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38results about How to "Extended forecast period" patented technology
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Coupled numerical meteorological and hydrological aggregate forecasting reservoir scheduling risk decision method
InactiveCN108764515AExtended forecast periodImprove forecast accuracyClimate change adaptationForecastingData assimilationOptimal scheduling
The invention discloses a coupled numerical meteorological and hydrological aggregate forecasting reservoir scheduling risk decision method comprising the steps that the numerical meteorological and hydrological aggregate forecasting model of the reservoir basin is established, and the flood process of the basin is forecasted in a rolling way; the uncertainty of hydrological aggregate forecastingis assessed by using the Bayes model averaging method, the Bayes posteriori probability is reckoned and the probability of the flood scene in the future is updated in real time; a flood scene tree isconstructed by using the method based on the probability distance on the basis of the hydrological aggregate forecasting result and branch cutting of the flood scene tree is performed; and a reservoiroptimal scheduling random change constrained programming model is established, the optimal scheduling decision of the reservoir is solved by using the optimization method and the decision risk is assessed. With application of the method, the forecast period of hydrological forecasting can be effectively extended and the forecast precision can be enhanced, and the uncertainty between modes and different data assimilation schemes is comprehensively considered; and the method is suitable for medium-and-short-term real-time reservoir scheduling and can significantly enhance the reliability of thereservoir scheduling decision.
Owner:HOHAI UNIV
Land-atmosphere coupling-based method and system for flood forecast of minor watersheds
ActiveCN102314554AAchieving Rolling ForecastsThe calculation result is accurateSpecial data processing applicationsFlood forecastModel parameters
The invention provides a land-atmosphere coupling-based method and a system for flood forecast of minor watersheds, which are used for solving the problem of low accuracy for the flood forecast of the minor watersheds. The method comprises the following steps: setting model parameters; inputting initial data; judging a runoff-generation manner through analyzing the initial data, calculating surface runoff if the runoff-generating manner is infiltration excess runoff, and taking the surface runoff as simulation runoff; calculating the infiltration amount of soil if the runoff-generating manner is saturation excess runoff, and calculating base runoff and subsurface runoff by using the soil infiltration amount; calculating to obtain the simulation runoff according to the base runoff and the subsurface runoff when the soil is unsaturated; and further calculating the surface runoff and calculating to obtain the simulation runoff according to the base runoff, the subsurface runoff and the surface runoff when the soil is saturated. The land-atmosphere coupling-based method and the system provided by the invention are suitable for calculating the simulation runoff of the minor watersheds, and the calculating result is more accurate through the combination of theory and practice, thus the land-atmosphere coupling-based method and the system are suitable for short-term or ultra-short-term runoff forecast and have high forecast accuracy.
Owner:DATANG SOFTWARE TECH
Novel distributed Hebei model construction method and application thereof
ActiveCN106202790AAchieve forecastFully consider the problem of uneven spatial distributionHuman health protectionForecastingWater resource planningWater circulation
The invention relates to a novel distributed Hebei model construction method and application thereof. The novel distributed Hebei model construction method comprises the following steps that firstly, drainage basin generalization is carried out; secondly, grids serve as study units, a Hebei model is used for establishing a grid runoff producing module; thirdly, a lag-and-route method and a Muskingum method are used for establishing grid-by-grid distributed confluence modules. The mature Hebei model is used for conducting grid runoff producing calculation, then, grid-by-grid confluence calculation is carried out, the situation that the space distribution of factors such as an underlying surface is uneven is fully considered in the model, the model can be coupled with an atmospheric mode, the forecast accuracy of storm flood is improved, the meeting period is prolonged, and the novel distributed Hebei model construction method has important significance for storm flood forecasting, a drainage basin water circulation mechanism, water resource planning, unified water resource management scheduling in the northern semiarid and semihumid regions in China.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Ensemble forecast flood forecasting method for improving forecast rainfall based on data assimilation
ActiveCN107403073AHigh precisionExtended forecast periodClimate change adaptationSpecial data processing applicationsFlood forecastData assimilation
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Method of advanced flood early-warning and forecasting
ActiveCN108416468AExtended forecast periodClimate change adaptationForecastingCloudburstDecision taking
The invention discloses a method of advanced flood early-warning and forecasting. According to a rainstorm similarity comprehensive-measurement method based on a total-quantity similarity index, a process similarity index, an earth-mover distance index and a rainstorm distribution similarity index, a similar rainstorm and a typical flood process corresponding thereto are found in historical rainstorms, then the typical flood process is scaled according to a rainstorm quantity ratio, and thus advanced flood early-warning and forecasting are realized. According to the method of the invention, aflood process forecasted period by period can be continuously updated with increasing of rainstorm flood process information, forecast precision shows gradual rising, thus a longer forecast period isobtained, and decision support can be provided for reservoir dispatching.
Owner:HOHAI UNIV
Auxiliary system for flood defense dispatching decision
InactiveCN106355274AReduce the impactQuickly judge the flood situationClimate change adaptationForecastingDecision makerFlood defense
This invention provides decision makers with an auxiliary system for flood defense dispatching decision serving as a basis of decision making. The auxiliary system for flood defense dispatching decision comprises a basic module database used for storing historical flood hydrograph and relevant rainfall amount as well as rainfall duration of each historical flood hydrograph; a basic database used to store units parameters; a flood forecasting module to forecast flood by scaling the adopted historical flood hydrograph in according with the total rainfall amount and rainfall duration predicted by weather forecast; a flood dispatching module used to set present parameters of flood releasing units and flood releasing facilities to simulate flood defense dispatching accordingly as well as in according with the total rainfall amount and rainfall duration predicted by weather forecast and the historical flood hydrograph. The auxiliary system for flood defense dispatching decision applicates to a technology field of computer-based flood defense dispatching.
Owner:DATANG CHENCUN HYDROPOWER PLANT
Feature extraction hydrological forecasting method based on deep learning
ActiveCN110619432AExtended forecast periodImprove applicabilityClimate change adaptationForecastingFeature extractionWater resources
The invention provides a feature extraction hydrological forecasting method based on deep learning, and belongs to the field of water resource efficient utilization and hydrological forecasting. The method comprises the following steps: firstly, obtaining a watershed hydrological forecasting characteristic factor set by utilizing watershed historical information; secondly, training the characteristic factor set by utilizing a data mining algorithm, and obtaining a plurality of groups of session flood process sets with similar magnitudes and process forms under the action of different factors;then, carrying out parameter calibration of all models and methods in traditional hydrological forecasting based on a deep learning algorithm, forming a model library and a method library matched withthe models, the methods and parameter schemes, and finally completing hydrological forecasting calculation in combination with clustering analysis. Compared with an existing method, the method has the advantages that the defects that a traditional hydrological forecasting method is low in forecasting precision, short in effective forecasting period and the like are effectively overcome, the forecasting precision can be obviously improved and the forecasting period can be obviously prolonged when hydrological forecasting is carried out, good applicability and feasibility are achieved, and an effective technical method is provided for basin hydrological forecasting.
Owner:BUREAU OF HYDROLOGY CHANGJIANG WATER RESOURCES COMMISSION
Flood forecasting method based on synthetic flow and shape fitting
ActiveCN107609335AExtended Forecast PeriodThe forecast is accurateClimate change adaptationOpen water surveyBusiness forecastingComputer science
The invention discloses a flood forecasting method based on synthetic flow and shape fitting and relates to the technical field of hydrological simulation and forecasting. The method comprises the steps that a correlation between target cross section flow and upstream cross section flow is inquired and forecasted; distributed hydrological model modeling is conducted on forecasting drainage basin,and obtained runoff generation and confluence parameters of each calculation unit in a distributed hydrological model are calibrated; according to flood peak data of each time and flood volume data ofeach time of a forecasting target cross section, the corresponding relation of the flood peak and the flood volume is fit; corresponding exponential-type water subsiding curve parameters in the actual water subsiding process are inquired; a flow forecasting result of the forecasting target cross section in the confluence forecast period is obtained through flow synthesis; the forecasting flood volume and the forecasting flood peak of the forecasting target cross section in the flood on the spot are acquired; the corresponding flow forecasting result which meets a preset requirement is used asa final result of flood forecasting of each time. According to the flood forecasting method, the forecast period of flood forecasting is prolonged, so that the forecasting result is more reasonable and precise.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Regional atmospheric and hydrological coupling early warning decision-making system and method
ActiveCN112782788AAccurateEffective simulationWeather condition predictionICT adaptationHydrometryInformation processing
The invention relates to the technical field of meteorological and hydrological forecasting and meteorological information processing, in particular to a regional atmospheric and hydrological coupling early warning decision-making system. The system comprises a regional data acquisition module for acquiring the regional data in real time; an artificial intelligence module which is used for obtaining a rainfall analysis model in the region; a rainfall forecast analysis module which is used for obtaining the rainfall amount and the rainfall path forecast in the region; a correction module which is used for obtaining the corrected precipitation amount and precipitation path forecast and storing the corrected precipitation amount and precipitation path forecast in a database; a hydrological data acquisition module which is used for acquiring the surface runoff data; a hydrological forecasting module which is used for providing water level forecasting, early warning and pre-discharging decisions in the region; a response demonstration module which is used for simulating the rainfall runoff trend in the region in several hours in the future and the convergence of rainfall to a low position on the ground so as to realize the runoff early warning and prediction; and an early-warning decision-making module which is used for determining an early-warning decision-making scheme according to a preset runoff monitoring point threshold value.
Owner:NAT SPACE SCI CENT CAS
Medium and long term mountain torrent disaster early-warning and pre-judging method
ActiveCN110737875AReduce riskThe purpose of effective disaster prevention and mitigationClimate change adaptationNeural architecturesAtmospheric sciencesComputer science
The invention relates to a medium and long term mountain torrent disaster early warning pre-judgment method. The method comprises the steps of mountain torrent early warning index calculation, basin rain type analysis, medium and long term rainfall prediction based on a neural network, mountain torrent disaster early warning pre-judgment and the like. Mountain torrent early warning is mainly carried out in a short duration in the past. According to the method, large-scale atmospheric data changes are considered, and the medium and long-term rainfall is forecasted by adopting a neural network method, so that the mountain torrent disaster occurrence trend is pre-judged, the forecast period can be greatly prolonged, good technical support is provided for mountain torrent disaster prevention and control, and meanwhile, the method has great significance in infrastructure construction and macroscopic decision making.
Owner:ZHEJIANG INST OF HYDRAULICS & ESTUARY
Predictor identification method of medium-long-term runoff and medium-long-term runoff predicting method
ActiveCN107622322AExtended forecast periodImprove forecast accuracyForecastingNeural learning methodsPredictive methodsLag
The invention provides a predictor identification method of a medium-long-term runoff and a medium-long-term runoff predicting method. The predictor identification method comprises: step one, standardization processing is carried out; step two, a forecast period is set, a standardized runoff sequence Q and a climatic factor set sequence F that include a series of different lag phases form a candidate predictor set X and a corresponding standardized runoff sequence Q is used as a set Y in Lasso regression; step three, a parameter lambda is given, crossed verification is carried out and a prediction set Y' is calculated, the prediction set Y' is compared with the set Y to obtain a first evaluation index of the parameter lambda; step four, M different parameters lambda are selected, first evaluation indexes are normalized, and the results are added and then scoring is carried out; step five, statistics of total scores of the parameters lambda is carried out, and the parameter lambda withthe highest total score is selected as an optimal parameter; and step six, on the basis of the optimal parameter, regression coefficients of all climate factors obtained at the step three are obtained, wherein the climate factor corresponding to the non-zero regression coefficient is identified to be a predictor.
Owner:STATE GRID QINGHAI ELECTRIC POWER +2
System for achieving real-time exchange of outdoor monitoring data of hydrological environment
InactiveCN105978978AEnsure real-time synchronizationEnsure safetyMeasurement devicesMessaging/mailboxes/announcementsInstrument DataInstrumentation
The invention discloses a system for achieving the real-time exchange of the outdoor monitoring data of a hydrological environment, and the system is characterized in that the system comprises a hydrological environment monitoring instrument, a mobile terminal, a central database, an overall processing module, a geographical information database, a task database, a task processing module, an employee database, a personal task list, a short message gateway cross certification system, and an instrument database. The invention relates to the field of hydrological environment outdoor monitoring, especially the system for carrying out real-time data exchange in the outdoor monitoring of the hydrological environment. The beneficial effects of the invention are that the system technically guarantees the real-time synchronism and safety of data; the system improves the position precision of section measurement; the system enables the monitoring data to be corrected and checked in real time, reduces the invalidation and repeated measurement of emergency monitoring data, improves the reliability of emergency monitoring data, and prolongs the forecast period of pollutant dispersion.
Owner:太湖流域管理局水文局(信息中心)
Reservoir flood limit water level dynamic control risk analysis method coupled with meteorological-hydrological uncertainty
InactiveCN112149983AEasy to operateExtended forecast periodClimate change adaptationResourcesHydrometryWater storage
The invention discloses a reservoir flood limit water level dynamic control risk analysis method coupled with meteorological and hydrological uncertainty, and the method comprises the following steps:calculating a deterministic flood limit water level dynamic control domain based on a two-stage prediction pre-discharge method; collecting and sorting data information, and obtaining risk source sample series data for distribution fitting; deducing a distribution density function of the total water storage surcharge, and calculating distribution parameters; defining and calculating a surcharge risk, and performing risk assessment and decision making. According to the reservoir flood limit water level dynamic control risk analysis model coupled with meteorological-hydrological uncertainty, numerical weather forecast information is applied to flood resource utilization in the flood season, and the flood resource utilization potential is improved; a forecasting pre-discharge method risk analysis model is established, risk decision information guidance is provided for a decision maker in real-time scheduling, and a reasonable and feasible flood resource utilization strategy is formulated.
Owner:HOHAI UNIV
Stream-river channel-estuary distributed flood process simulation method suitable for coastal region
PendingCN113723024AImprove forecast accuracyExtended forecast periodClimate change adaptationArtificial lifeSource dataMulti source data
The invention discloses a'stream '-'riverway'-'estuary 'distributed flood process simulation method suitable for a coastal region, which comprises the following steps of: firstly, collecting basic information data of a system, and generalizing a complex watershed system; then establishing a multi-source heterogeneous data three-dimensional monitoring system for rainstorm flood of the watershed, and carrying out multi-source data fusion; secondly, a high-resolution stream-river channel-estuary distributed flood simulation model considering water engineering such as barrages and reservoirs in the drainage basin at the same time is constructed; and finally, completing model calibration and verification based on multi-source fusion data, and carrying out dynamic real-time simulation on a key section and an easily waterlogged region. By adopting the method, distributed flood simulation from a stream to an estuary can be realized, the effectiveness, scientificity and calculation precision of coastal region flood forecasting are expected to be improved, and flood simulation and prediction theories and methods are perfected.
Owner:ZHEJIANG UNIV
Prediction method of flood peak value and peak time of storm water inrush from underground river in karst tunnel
ActiveCN102930357BSimple structureEasy to calculateClimate change adaptationForecastingPredictive methodsKarst
The invention discloses a method for forecasting water burst flood peak and peak time for a karst tunnel underground river. The method comprises the following steps: (1) computing point rainfall; (2) determining areal rainfall according to the point rainfall; (3) computing effective precipitation according to the areal rainfall; (4) computing time interval unit hydrograph; (5) computing effective precipitation unit hydrograph according to the time interval unit hydrograph; (6) computing surface runoff according to the effective precipitation and the effective precipitation unit hydrograph; (7) computing subsurface runoff; (8) adding the surface runoff at each time interval and the subsurface runoff at the corresponding time intervals to obtain flood discharge; (9) performing fitting on value of the flood discharge to obtain a flood hygrograph; and (10) obtaining the flood peak and the corresponding peak time on the flood hygrograph and determining construction time for a karst tunnel according to the flood peak and the corresponding peak time. According to the method provided by the invention, the water burst flood peak in the tunnel and the arrival time of the flood peak can be accurately forecasted, so that the construction time for the tunnel can be reasonably arranged, and the lives of people and the safety of mechanical equipment can be ensured.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
Small watershed flood forecasting and early warning method and terminal
PendingCN113673765AExtended forecast periodOvercome limitationsHuman health protectionForecastingHydrometryAtmospheric sciences
The invention discloses a small watershed flood forecasting and early warning method and a terminal, and the method comprises the steps: obtaining historical hydrological data and watershed basic data, building a hydrological-hydrodynamic coupling initial model based on MIKE series software and the watershed basic data, and calibrating the hydrological-hydrodynamic coupling initial model through the historical hydrological data, obtaining a calibrated hydrological-hydrodynamic coupling model; acquiring grid weather forecast data and evaporation capacity data in a research basin and preheating period rainfall data of each rainfall station, obtaining forecast period rainfall data according to the grid weather forecast data, and importing the preheating period rainfall data, the evaporation capacity data and the forecast period rainfall data into a hydrological-hydrodynamic coupling model, and generating and displaying flood forecasting and early warning information. According to the method, real-time, convenient, accurate and high-forecast-period small watershed flood forecasting and early warning can be realized.
Owner:SICHUANG TECH CO LTD
Runoff prediction system and method based on satellite microwave observation data
PendingCN112766531AEffective simulationEffective forecasting abilityWeather condition predictionForecastingHydrometryAnalytic model
The invention relates to the technical field of runoff forecasting, in particular to a runoff forecasting system based on satellite microwave observation data, which comprises a satellite data collection module used for collecting satellite data in real time; an artificial intelligence module is used for establishing a database and obtaining a rainfall analysis model; a rainfall forecast analysis module is used for obtaining rainfall amount and rainfall path forecast; a correction module is used for obtaining the corrected precipitation amount and precipitation path forecast and storing the corrected precipitation amount and precipitation path forecast in a database; a hydrological data collection module is used for collecting surface runoff data; a hydrological forecasting module is used for simulating a hydrological process under a complex terrain condition based on an atmospheric hydrological coupling mode and providing water level forecasting, early warning and pre-discharging decisions in the region; a response demonstration module is used for simulating a rainfall runoff trend in a few hours in the future and convergence of rainfall to a low position on the ground according to the obtained corrected rainfall amount and rainfall path forecast in combination with surface runoff data so as to realize runoff prediction.
Owner:NAT SPACE SCI CENT CAS
Total variation decreasing method for improving riverway calculation stability
ActiveCN112560230ANo oscillationImprove computing efficiencyClimate change adaptationDesign optimisation/simulationHydrometryFlood forecast
The invention discloses a total variation decreasing method for improving the riverway calculation stability. The method is mainly used for riverway calculation in hydrological forecasting. Accordingto the total variation decreasing method, a monotonous and non-oscillating first-order form and a non-monotonous and high-precision second-order form are combined by introducing a limiter, so that thesimulated river cross section flow keeps the second-order precision as much as possible in a relatively gentle water volume increase and decrease time period, and a first-order form is introduced ina time period when the water quantity is greatly increased or decreased to maintain the stability of corresponding riverway calculation. After the riverway calculation method is combined with the total variation decreasing format, the riverway calculation efficiency is higher, the result is more stable, oscillation or diffusion is not generated, and good simulation precision can be kept. Therefore, the total variation decreasing method can promote the development of a hydrological forecasting model and reservoir scientific management, can be used for real-time flood forecasting, and improves the forecasting period and the simulation precision.
Owner:HOHAI UNIV
Cascade reservoir group two-stage water abandoning risk assessment method based on coupling forecasting
ActiveCN113077163AImprove accuracyExtended forecast periodForecastingResourcesEnvironmental engineeringRisk assessment
The invention relates to a cascade reservoir group two-stage water abandoning risk assessment method based on coupling forecasting. The method comprises the following steps: carrying out multi-scenario forecast on reservoir incoming water in a forecast period; establishing a cascade reservoir two-stage water abandoning risk assessment model, assessing the water abandoning risks of two stages within and outside a forecast period of the cascade reservoir, and coupling to obtain a cascade reservoir two-stage total water abandoning risk; carrying out rationality verification on the cascade reservoir two-stage water abandoning risk assessment model; and updating the forecast information in the forecast period in a rolling manner to obtain a water abandoning risk assessment result of the whole scheduling period. According to the method, quantitative calculation is carried out on the water abandoning risks inside and outside the prediction period, the total water abandoning risk of the two stages is obtained through coupling, and the water abandoning risk of the cascade reservoir group is reasonably evaluated; according to the method, the water abandoning risk outside the prediction period is considered, the accuracy of the calculated water abandoning risk is better, and the actual scheduling risk of the cascade reservoir is better met.
Owner:HUBEI QINGJIANG HYDROPOWER DEV +1
A Flood Forecasting Method and System for Medium and Small Rivers Based on Multi-Feature Fusion Technology
ActiveCN108388957BGood prediction accuracyIncrease defense warning timeClimate change adaptationForecastingHydrometryHourly rainfall
The present invention relates to a method for forecasting floods of medium and small rivers based on multi-feature fusion technology and its forecasting system, belonging to the field of water conservancy information technology processing, comprising the following steps: S1, obtaining the hourly rainfall of each rainfall station for historical flood events and actual flood events Observational data; then perform similarity feature matching on these rainfall observation data to obtain multiple different matching results, and put the above multiple different matching results into different sets; S2. Adopt the principal component analysis voting algorithm based on water conservancy data , vote on the matching results of each hydrological feature, and find the flood event with the highest number of votes, so as to obtain the most similar flood process, which is used for flood forecasting of small and medium rivers. The invention solves the problem of flood forecasting of medium and small rivers in humid and semi-arid and semi-humid regions of my country, and improves the precision of flood forecasting and forecasting of medium and small rivers.
Owner:HOHAI UNIV
Periodic time transaction volume prediction method and device
PendingCN110287086AExtended forecast periodImprove accuracyHardware monitoringTransaction dataData mining
The invention provides a periodic time transaction volume prediction method and device. The method comprises the steps of obtaining first time sequence data corresponding to a to-be-predicted moment according to historical transaction data; wherein each first sample data in the first time sequence data has the same trading volume date attribute; obtaining a transaction volume reference value at the to-be-predicted moment according to the first time sequence data; obtaining a transaction volume prediction value at the to-be-predicted moment according to the transaction volume difference value and the transaction volume reference value; wherein the transaction volume difference value is obtained in advance according to the historical transaction data. The device is used for executing the method. Accuracy of transaction volume prediction is improved.
Owner:INDUSTRIAL AND COMMERCIAL BANK OF CHINA
Distributed unit line flood forecasting method
ActiveCN111861014APracticalImprove forecast accuracyDigital data information retrievalClimate change adaptationHydrometryModel parameters
The invention discloses a distributed unit line flood forecasting method, which comprises the following steps of: 1, collecting hydrological data in a whole watershed, and dividing the whole watershedinto a plurality of single small watersheds; 2, respectively calculating the rising duration and the unit calculation period length of the unit line of each single small watershed; 3, calculating thenumber of pre-peak time periods and the number of post-peak time periods of the initial unit line; 4, calculating an initial unit line distribution proportion and a time segment numerical value of each time segment; 5, calculating a deformation tool line and K groups of unit lines; 6, calculating the initial lag time of each single small watershed; 7, calculating a line number corresponding to each single small watershed, and selecting a corresponding runoff production unit line according to the line number; and step 8, establishing an initial basin flood forecasting model, calculating runoffproduction results, and accumulating the runoff production results to obtain a forecasting result. The method has the advantages of few model parameters, convenience in calculation and high fitting degree.
Owner:广东省水文局梅州水文分局
Medium and small river basin geological disaster and flood early warning method based on critical rainfall
InactiveCN113743658AAccurate captureEasy to distinguishClimate change adaptationForecastingHydrometryFluvial
The invention discloses a medium and small river basin geological disaster and flood early warning method based on critical rainfall. The method comprises the following steps: step 1, calculation of area rainfall: generally adopting an arithmetic mean method and a Thiessen polygon method. The Thiessen polygon method firstly calculates time period rainfall of each station of a river basin; and then, according to the weight of the area of the drainage basin occupied by each rainfall station, superposes the time period rainfall of each rainfall station in the drainage basin by adopting a weighting method. The method has indexes which are easy to distinguish, can accurately capture geological disaster events caused by rainstorm, heavy rain and the like in small and medium watershed areas, has good forecasting effect, has high practical application value and is worthy of popularization, has important guiding significance for currently developed hydrological monitoring and early warning of flood-prone areas of medium and small rivers and national mountain torrent disaster prevention and control pilot work, and effectively avoids the problem that the height of flood cannot be predicted in time when the existing medium and small river basins encounter flood seasons.
Owner:KUNMING UNIV OF SCI & TECH
A Flood Forecasting Method Based on Synthetic Flow and Shape Fitting
ActiveCN107609335BExtended forecast periodThe forecast is accurateClimate change adaptationOpen water surveyBusiness forecastingComputer science
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
A Distributed Hebei Model Construction Method and Its Application
ActiveCN106202790BAchieve forecastFully consider the problem of uneven spatial distributionHuman health protectionForecastingWater resource planningWater circulation
The invention relates to a novel distributed Hebei model construction method and application thereof. The novel distributed Hebei model construction method comprises the following steps that firstly, drainage basin generalization is carried out; secondly, grids serve as study units, a Hebei model is used for establishing a grid runoff producing module; thirdly, a lag-and-route method and a Muskingum method are used for establishing grid-by-grid distributed confluence modules. The mature Hebei model is used for conducting grid runoff producing calculation, then, grid-by-grid confluence calculation is carried out, the situation that the space distribution of factors such as an underlying surface is uneven is fully considered in the model, the model can be coupled with an atmospheric mode, the forecast accuracy of storm flood is improved, the meeting period is prolonged, and the novel distributed Hebei model construction method has important significance for storm flood forecasting, a drainage basin water circulation mechanism, water resource planning, unified water resource management scheduling in the northern semiarid and semihumid regions in China.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
An Intelligent Method of Real-time Flood Forecasting Based on Face Recognition Algorithm
ActiveCN112711917BHigh precisionExtended forecast periodClimate change adaptationForecastingHydrometryAlgorithm
The present invention discloses a real -time flood forecasting intelligent method based on face recognition algorithms. By extracting and identifying the characteristic factor that affects the evolution of the flood, it clearly affects the factors and indicators of the flooding process of the field, and establishes a characteristic factor combination and historical field floods.One -to -one correspondence; by establishing a static parameter library, the combination of different feature factor, the matching relationship between the flood process and hydrological forecasting model and parameter of the scene; when facing the current floods, the current hydrological meteorological conditions and history are achieved through the face recognition algorithmThe matching of the farming process corresponds to the combination of feature factor combinations, and then realize the real -time forecast of the flood process.
Owner:BUREAU OF HYDROLOGY CHANGJIANG WATER RESOURCES COMMISSION
Land-atmosphere coupling-based method and system for flood forecast of minor watersheds
ActiveCN102314554BAchieving Rolling ForecastsThe calculation result is accurateSpecial data processing applicationsFlood forecastModel parameters
The invention provides a land-atmosphere coupling-based method and a system for flood forecast of minor watersheds, which are used for solving the problem of low accuracy for the flood forecast of the minor watersheds. The method comprises the following steps: setting model parameters; inputting initial data; judging a runoff-generation manner through analyzing the initial data, calculating surface runoff if the runoff-generating manner is infiltration excess runoff, and taking the surface runoff as simulation runoff; calculating the infiltration amount of soil if the runoff-generating manner is saturation excess runoff, and calculating base runoff and subsurface runoff by using the soil infiltration amount; calculating to obtain the simulation runoff according to the base runoff and the subsurface runoff when the soil is unsaturated; and further calculating the surface runoff and calculating to obtain the simulation runoff according to the base runoff, the subsurface runoff and the surface runoff when the soil is saturated. The land-atmosphere coupling-based method and the system provided by the invention are suitable for calculating the simulation runoff of the minor watersheds, and the calculating result is more accurate through the combination of theory and practice, thus the land-atmosphere coupling-based method and the system are suitable for short-term or ultra-short-term runoff forecast and have high forecast accuracy.
Owner:DATANG SOFTWARE TECH
Reservoir flood season operation water level dynamic control method and system based on typhoon path
PendingCN114118554AExtended forecast periodClimate change adaptationForecastingEngineeringEnvironmental engineering
The invention discloses a reservoir flood season operation water level dynamic control method and system based on a typhoon path, and the method comprises the steps: predicting the path length of a typhoon center and a reservoir through calculating the typhoon path, and predicting the time for the typhoon center to reach the reservoir according to the path length and the typhoon operation speed; according to the relation between the typhoon distance and the rainfall intensity, the pre-drainage time duration of the reservoir is predicted; solving the maximum operating water level of the reservoir, and dynamically determining the maximum operating water level of the reservoir according to the predicted period length and the pre-discharge capacity; and finally, dynamically controlling the water level of the reservoir according to the dynamically determined highest operating water level of the reservoir. According to the method, typhoon information is considered, the prediction period of dynamic control of the running water level in the flood season is prolonged, the calculation result is closer to the actual reservoir dispatching, and the reservoir flood resources are utilized to the maximum extent.
Owner:WUHAN UNIV
Automatically-calibrating rolling forecasting method for flood
PendingCN113987767ARaise the base level and look aheadAccurately reflectData processing applicationsClimate change adaptationNumerical modelsStream flow
The invention relates to an automatically-calibrating rolling forecasting method for flood. The method is characterized by comprising the following steps of: acquiring a forecasting site determined by a user in a simulation area, and determining a topological relation between the forecasting site and upstream and downstream sites and a river reach according to a spatial topological relation of a river channel in the simulation area; extracting actually-measured water level or flow data of the along-way river channel in the simulation area at a simulation calculation moment, conducting interpolation on the actually-measured water level or flow data, and inputting the interpolated data into a verified rolling forecasting model for flood; outputting the forecast water level and flow data of the forecasting site according to the input data, the forecasting site and the upstream and downstream topological relation of the forecasting site through the rolling forecast model for flood; and carrying out data assimilation on the forecast water level and flow data by adopting measured data, wherein the rolling forecasting model for flood comprises a one-dimensional non-constant flow numerical model corresponding to the simulation area and an NAM hydrological model coupled with the one-dimensional non-constant flow numerical model. The method is applicable to the flood forecasting field.
Owner:POWERCHINA HUADONG ENG COPORATION LTD +1
Medium and long term runoff prediction method based on numerical rainfall forecast
PendingCN114372623AExtended forecast periodImprove long-term power generation efficiencyForecastingGeographical information databasesAtmospheric sciencesWeather prediction
Owner:STATE GRID FUJIAN ELECTRIC POWER CO LTD +1
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