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33 results about "Kinematic wave" patented technology
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In gravity and pressure driven fluid dynamical and geophysical mass flows such as ocean waves, avalanches, debris flows, mud flows, flash floods, etc., kinematic waves are important mathematical tools to understand the basic features of the associated wave phenomena. These waves are also applied to model the motion of highway traffic flows.
Underground velocity model building method
ActiveCN106483559AAvoid manual/semi-automatic pickingSeismic signal processingKinematicsKinematic wave
The invention discloses an underground velocity model building method, and belongs to the technical field of oil and gas exploration and development. The process of pre-stack seismic event artificial / semi-automatic pick-up is avoided, and the building process of an underground velocity model is speeded up. The underground velocity model building method comprises the following steps: acquiring a common reflection surface stacking operator; acquiring the kinematic wave field attribute parameters of seismic wave according to the common reflection surface stacking operator; and building an underground velocity model based on a built regularization chromatography equation, the kinematic wave field attribute parameters and a built initial underground velocity model.
Owner:CHINA PETROLEUM & CHEM CORP +1
Mixed containing cavity heat dissipation gas wave refrigerating machine
ActiveCN101762110AShorten the receiving tube lengthDissipativeCompression machinesShock waveKinematic wave
The invention relates to a mixed containing cavity heat dissipation gas wave refrigerating machine, belonging to the field of gas expansion refrigeration low temperature technology, a pressure gas is jetted to a receiving pipe to generate kinematic waves to dissipate energy, thereby realizing refrigeration, the rotating speed is low and the operation is simple. The mixed containing cavity heat dissipation gas wave refrigerating machine is mainly composed of a machine body, a rotating jet flow distributor, a short receiving pipe, a receiving pipe cylinder, a mixed containing cavity and a heat exchanging unit and is characterized in that the end of the short receiving pipe is opened and is communicated with the mixed containing cavity, the heat exchanging unit is arranged in the mixed containing cavity, and the energy of a compression wave or a shock wave, which is transmitted to the mixed containing cavity from the short receiving pipe, is adsorbed by the heat exchanging unit. The heat dissipation and buffer structure that the mixed containing cavity is spliced by the short receiving pipe is adopted in the invention, therefore, the complete machine volume is small, the pipe can not be broken by vibration, the refrigeration efficiency is high, the changing fluctuation is little, the exhaust of refrigeration gas condensate is very convenient, and the transformed energy is easy to be recycled. The mixed containing cavity heat dissipation gas wave refrigerating machine can be widely used in the field of condensation separation of mixed gas, light dydrocarbon recycle in petroleum gas, low temperature dehydration of natural gas, low-temperature gas source supply and the like.
Owner:DALIAN UNIV OF TECH
USRAMS-based optimization design method of rainwater pipe network
ActiveCN106650053AReliable Design ResultsSimple and fast to buildGeometric CADSpecial data processing applicationsKinematic waveRunoff coefficient
An USRAMS-based optimization design method of a rainwater pipe network belongs to the crossing field of drainage pipe line design and hydraulic models. Aiming at the imperfection of the rational formula method and the requirements of the new version Outdoor Drainage Specifications, the invention is based on rainwater pipe network design data to establish a USRAMS rainwater pipe network hydraulic model; kinematic wave is adopted for simulating calculation; pipe section overload is used as the verification standard according to the model results; the design scheme is optimized according to the model results so that the reliability of rainwater pipe network design is increased. The number of required parameters is less and the parameters are easy to obtain; the runoff coefficient and the water catchment time can be directly obtained; the process of establishing models is simple and quick; the model results are reliable; the applicability of the method is guaranteed; the method has operability; complicated programming is not required; steps can be finished by means of present software; the operation is simple and easy; the feasibility of the invention is guaranteed.
Owner:BEIJING UNIV OF TECH
Sub-basin confluence simulation method based on slope channel river three-level structure
ActiveCN110717231AImprove the simulation effectGeometric CADGeographical information databasesHydrometryRiver routing
The invention discloses a sub-basin confluence simulation method based on a slope channel riverway three-level structure, and relates to the technical field of distributed hydrological model confluence simulation. The method comprises the following steps: extracting a river channel and a channel based on DEM data, and dividing drainage basin grids into slope grids, channel grids and river channelgrids according to categories; calculating the length of a confluence path from each grid to a basin outlet, and counting the number of channels and the average length of the channels according to thetypes of the channel grids; setting the confluence attribute of each grid in the drainage basin according to the riverway or channel grid into which each grid finally converges; and according to thegrid confluence attribute, determining equal-height zone slope, channel and river channel runoff distribution coefficients respectively, and adopting a motion wave equation as a basic simulation formula of slope, channel and river channel confluence to perform confluence simulation on the sub-basins and the equal-height zones. According to the method, the influence of the channel confluence process on water circulation can be considered, and the confluence process simulation effect is improved.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Numerical simulation method combining kinematic waves with dynamic waves for flood process in mountainous area
ActiveCN107451372AGuaranteed stabilityAvoid false wet and dry problemsClimate change adaptationDesign optimisation/simulationMomentumKinematic wave
The invention discloses a numerical simulation method combining kinematic waves with dynamic waves for a flood process in a mountainous area. According to the method, on the basis of a triangular unstructured mesh finite volume numerical discretization frame, kinematic wave and dynamic wave control equations are both in conservation forms, variables have cell centers, and the discretization format is a Godunov format. Solution methods are distinguished by conducting property assignment on a grid cell solver, when the property is 0, the kinematic wave control equation is solved, and when the property is 1, the dynamic wave control equation is solved. The continuous equations of the kinematic waves and dynamic waves are same, and continuous equations of all grid cells are uniformly solved in a Roe format. When the grid property is 0, a kinematic wave momentum equation is adopted to directly solve conservation variables of the next moment; when the grid property is 1, interfacial momentum numerical flux is calculated in a Roe format, and conservation variables of the next moment are solved by the summation of the momentum flux, bottom slope items and frictional items. According to the method, the practical application capability of a hydrodynamic model during simulation of the flood process in the mountainous area can be effectively improved, and the deficiency of current hydrologic methods is made up.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Method for estimating surface roughness and soil moisture absorption rate of slope under rainfall conditions
InactiveCN105138761ADetermination of moisture absorptionSpecial data processing applicationsSoil scienceEstimation methods
The invention discloses a method for estimating the surface roughness and soil moisture absorption rate of a slope under rainfall conditions. The movement process of water flow on a slope is described with the help of a kinematic wave equation, the kinematic wave equation is approximately solved by an analytical method to obtain the relation between changes in water flow and depth in different positions of the slope with time, and the surface roughness and soil moisture absorption rate are determined based on the change relation and observed data of rainfall. The method for estimating the surface roughness and soil moisture absorption rate of a slope under rainfall conditions is different from previous measurement methods which cause large error and have limitations. By using the method of the invention, as long as there is data of one rainfall, the volume of runoff at the exit is measured and a water balance equation is established based on a relational expression of changes in water flow and depth in different positions of the slope with time, the surface roughness and soil moisture absorption rate can be determined.
Owner:XIAN UNIV OF TECH
Diffracted wave separation method based on kinematic wave field attribute
The invention provides a diffracted wave separation method based on a kinematic wave field attribute, and belongs to the field of seismic exploration data processing. The method comprises (1) inputting a seismic data body, (2) performing automatic CMP superposition based on a CMP gather to obtain a parameter q and a ZO profile, (3) searching a parameter [beta] and a parameter R<N> based on the ZO profile, (4) calculating a parameter R<NIP> by utilizing the parameter q and the parameter [beta], and (5) performing wave field separation by utilizing the parameter R<N> and the parameter R<NIP> to obtain a diffracted superposition profile. A difference of a diffracted wave and a reflected wave in a kinematic characteristic is fully used, a filter formula of a separated diffracted wave is designed through the kinematic wave field attribute parameters obtained in a superposition process, and diffracted wave information is separated on the superposition profile.
Owner:CHINA PETROLEUM & CHEM CORP +1
Method for estimating raindrop-induced moisture transfer rate and mixed layer depth
PendingCN110968933AEasy to getImprove universal applicabilityEarth material testingDesign optimisation/simulationWave equationKinematic wave
The invention discloses a method for estimating raindrop induced moisture transfer rate and mixed layer depth, which comprises the following steps of: establishing a motion wave equation, and solvinga slope runoff motion process; then establishing a runoff and solute concentration change equation in the mixed layer, calculating the raindrop induced moisture transfer rate and the depth of the mixed layer in combination with the loss data of NO3 <->-N in the actually measured runoff, and finally verifying the calculated raindrop induced moisture transfer rate and the depth of the mixed layer byusing the loss data of NH4 < + >-N in the actually measured runoff. The method solves the problem that it is difficult for an existing model to conveniently and accurately determine the raindrop-induced moisture transfer rate and the depth of the mixed layer.
Owner:XIAN UNIV OF TECH
Sub-basin confluence simulation method considering influence of silt dam
The invention discloses a sub-basin confluence simulation method considering the influence of a silt dam, and relates to the technical field of distributed hydrological model sub-basin confluence simulation. The method includes: adopting a sub-basin contour zone sleeving mode as a model basic calculation unit; dividing the sub-basins into equal-height zones with different numbers according to theelevation based on DEM; and counting relevant parameters, extracting channel grids, setting channel length thresholds, elimiating dummy channels, carrying out generalization on the silt dam in the equal-height zone and carrying out statistics on related parameters of the silt dam; carrying out slope confluence process simulation on each equal-height zone and caryring out confluence process simulation on sub-basin channels by adopting a kinematic wave equation, carrying out regulation and storage correction on channel confluence amount by adopting a silt dam water balance principle, and simulating a riverway confluence process by adopting the kinematic wave equation. According to the method provided by the invention, the influence of silt dam construction in the calculation unit on the confluence process can be simulated.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Estimation method of slope roughness and silt erosion rate under rainfall condition
ActiveCN110568152AEasy to getImprove universal applicabilityEarth material testingPermeability/surface area analysisEstimation methodsErosion rate
The invention discloses an estimation method of a slope roughness factor and a silt erosion rate under the rainfall condition. The method comprises the following steps of firstly building an infiltration model under the rainfall condition to obtain the accumulated infiltration quantity in the rainfall process; then, building a kinematic wave equation; obtaining the rope roughness and the slope water depth by combining with the balance relationship of the accumulated infiltration quantity, the kinematic wave equation and the water quantity; then, building a silt conveying equation; and determining the silt erosion rate according to practically measured rainfall data and the slope water depth. Under the condition of the time of once rainfall, the unit time flow rate and silt quantity in a position of a flow outlet are measured; the slope roughness factor and the silt erosion rate can be obtained by combining with the relationship between the flow rate and the water depth and the relationship among the rain intensity, the water depth and the silt generating quantity; a parameter obtaining method of the infiltration process is simplified; and the general applicability of the estimationresult is improved.
Owner:XIAN UNIV OF TECH
Flow confluence calculation method in complex underlying surface condition of city
InactiveCN105844076AHigh solution accuracySpecial data processing applicationsInformaticsTerrainKinematic wave
The invention discloses a flow confluence calculation method in a complex underlying surface condition of a city. The method comprises following steps of: step 1, constructing a kinematic wave equation describing an overland flow motion and setting initial conditions and boundary conditions; step 2, constructing an evolution equation on the basis of a discrete velocity model; step 3, processing and calculating multi-scale problems of the Lattice Boltzmann method; step 4, determining an equilibrium state distribution function; step 5, processing the initial conditions and the boundary conditions; and step 6, solving an overland flow motion equation through the improved Lattice Boltzmann method. Compared with the prior art, the flow confluence calculation method can be applied for solving the overland flow motion equation, and by means of the processing method of the multi-scale problems, solving precision of the overland flow motion equation is effectively improved, and problems of increasing complexity of the underlying surface terrains and covering features of a drainage basin in a background of acceleration of urbanization processes are solved.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES +1
Wave-driven blower and electric motor/generator
InactiveUS20130195616A1Improve power densityReduce decreaseWind motor controlPump controlChemical compositionClassical mechanics
The present invention provides a wave-driven blower and a wave-driven generator. Embodiments can accelerate fluid flows with waves requiring with no or minimal moving parts. The waves driving the flow can be surface-thermal waves on the walls of the device. The velocity of the surface-thermal wave entrains the fluid near the surface and imparts a velocity to the fluid. Other types of waves can generate fluid flow. These other waves can be produced by variations in chemical composition, ionic concentration, chemical potential, total pressure, partial pressure and surface texture. Operating as a generator, the device extracts energy from a flowing fluid to amplify wave motions. The wave motions in turn generate electrical power or some other form of useable power
Owner:EPSTEIN RICHARD
Six-degree-of-freedom pool trial trip instrument suitable for submerged body icebreaking research
ActiveCN110926756AAdjust Surge Forced MovementAdjust its motion amplitudeHydrodynamic testingWater dischargeWave shape
The invention discloses a six-degree-of-freedom pool trial trip instrument suitable for submerged body icebreaking research. The trial trip instrument mainly comprises a guide rod movement mechanism,a cam movement mechanism and a waveform monitoring mechanism, wherein the guide rod movement mechanism and the cam movement mechanism are cooperated and matched, so that a submerged body can generatethe six-degree-of-freedom combined movement of surging, swaying, heaving, rolling, pitching and yawing; and the waveform monitoring mechanism is used for recording the ice layer bending deformation response excited when the submerged body moves at different combination degrees of freedom. According to the ice pool trial trip instrument provided by the invention, the motion state of the submerged body in a pool can be flexibly adjusted according to the experimental research requirements, so that the ice breaking efficiency of the submerged body in different motion states is explored, and the data support is provided for the ice breaking and water discharging operation of the submerged body.
Owner:JIANGSU UNIV OF SCI & TECH
Sub-basin confluence simulation method considering influence of terrace silt dam
The invention discloses a sub-basin confluence simulation method considering the influence of a terrace silt dam, and relates to the technical field of hydrological model simulation. The method comprises the following steps: taking a mode of sleeving equal-height zones in sub-basins as a basic calculation unit of a model, dividing the sub-basins into unequal-number equal-height zones according toelevation based on DEM, counting related parameters, extracting channel grids, setting a channel length threshold, and removing pseudo-channels; generalizing the terraces and the silt dams in the equal-height zone, calculating the interception ratio of the terraces to slope runoff, and counting related parameters of the silt dams; and simulating the confluence process of the slope surface, the single channel and the riverway of each equal-height zone based on a motion wave equation. According to the method, the influence of silt dam construction and terrace construction in the calculation uniton the confluence process can be simulated.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Method for estimating earth's surface roughness coefficient and infiltration parameters of slope under the condition of water flow erosion
InactiveCN105095669AReduced measurement timeImprove accuracySpecial data processing applicationsEstimation methodsKinematic wave
The invention discloses a method for estimating earth's surface roughness coefficient and infiltration parameters of a slope under the condition of water flow erosion. The method comprises the steps of establishing a kinematic wave equation, then solving the kinematic wave equation by means of an analytical method to obtain the changing relation with time of slope flow and water depth, and determining the earth's surface roughness coefficient and infiltration parameters according to actually-measured data under the condition of water flow erosion. Compared with an existing trace method for flow speed measurement, the measurement time is shortened, the estimating accuracy is improved, the earth's surface roughness coefficient and infiltration parameters (a, b) can be simultaneously determined under the condition that inflow and outflow are known, and the operation is simple and easy.
Owner:XIAN UNIV OF TECH
Anti-vibration device for underwater equipment
PendingCN107843917AReal-time direct or indirect monitoring of motion statusEffective anti-seismicEarthquake measurementSeismic signal receiversOcean bottomElectricity
The invention discloses an anti-vibration device for underwater equipment, and the device comprises an earth crust displacement monitoring module which is fixedly installed on a detected earth crust rock stratum and is used for monitoring the displacement of the earth crust rock stratum in real time to obtain an earth crust displacement signal and obtaining an earth crust displacement electric signal through processing; a crust movement sound wave monitoring module which is fixedly installed in the detected earth crust rock stratum and is sued for directly monitor the earth crust movement or amovement sound wave generated by sea quake in real time, or is installed on underwater engineering equipment and is used for indirectly monitoring the movement of the seabed earth crust and sound wave signals generated by earthquake or tsunami, and converting the movement sound wave into a movement wave electric signal; and a signal processing module, wherein the input end of the signal processing module is connected to the earth crust displacement monitoring module and the crust movement sound wave monitoring module, and the signal processing module is used for carrying out the analysis processing of the earth crust displacement electric signal and / or the movement wave electric signal, and obtaining corresponding result information. The device can directly or indirectly monitor the movement state of the seabed crust and the state of the sea quake in real time.
Owner:MSP DRILEX SHANGHAI
DEM-based dynamic basin sediment yield simulation method
The invention discloses a dynamic drainage basin sediment yield simulation method based on a DEM, and relates to the technical field of water and soil loss analys.The loess gully area is divided into three vertical distribution units including a ridge and loess slope area, a valley slope area and a trench area according to the terrain by obtaining terrain data and rainfall data of the loess gully area; a distributed runoff movement numerical model based on DEM grids is established by adopting a slope flow movement wave equation, the runoff depth, the flow velocity and the flow of each grid at any moment in the loess gully area drainage basin are calculated, the runoff and sediment yield is deduced according to a mechanical concept, and the simulation work of the dynamic drainage basin sediment yield is completed.
Owner:HOHAI UNIV +1
Wave direction self-adaptive multi-water-channel wave focusing type wave energy power generation device
PendingCN110714873ALow environmental requirementsLimit kinetic energyBatteries circuit arrangementsHydro energy generationA wave amplitudeGear wheel
The invention belongs to the technical field of ocean energy utilization, and provides a wave direction self-adaptive multi-water-channel wave focusing type wave energy power generation device. The wave direction self-adaptive multi-water-channel wave focusing type wave energy power generation device comprises an energy collecting system, an energy conversion system and a supporting system. Wavesare focused through double water channels, and the motion wave amplitude of water mass points behind a box body is doubled. A device and a fixed pile column are connected through a universal bearing,an opening of the device always faces the flowing direction of the waves, and the device adapts to different seasons and water area conditions, is low in requirement for the environment and can be putinto use in a wide sea area. A plurality of circles of pre-stretching spring pressing pieces are arranged in a winding barrel, it is guaranteed that no matter a floater is positioned at the wave crest or the wave trough, a nylon rope connected with the floater is always in a straightened state, and the situation that due to loosening, the rope is derailed to a pulley block, and consequently normal work cannot be achieved is avoided. A pawl is fixed to a fixed connection gear connected with a ratchet wheel, so that only rotation in one direction in the two-way rotation of the winding barrel drives the ratchet wheel to operate, accordingly, one-way energy storage of a flywheel rotor in a power generation cabin is determined, and meanwhile the kinetic energy upper limit of a flywheel is limited.
Owner:DALIAN UNIV OF TECH
A Construction Method of Subsurface Velocity Model
ActiveCN106483559BAvoid manual/semi-automatic pickingSeismic signal processingKinematicsSemi automatic
Owner:CHINA PETROLEUM & CHEM CORP +1
Application of alhagi sparsifolia extract in preparation of medicine for treating irritable bowel syndrome
InactiveCN105943592AGood treatment effectRaised Capacity ThresholdDigestive systemPlant ingredientsSide effectIrritable bowel
The invention relates to the technical field of traditional Chinese medicine and application thereof, in particular to application of an alhagi sparsifolia extract in preparation of medicine for treating an irritable bowel syndrome. The alhagi sparsifolia extract has the good treatment effect on IBS-D, particularly, the alhagi sparsifolia extract has the effects of increasing the abdominal withdrawal reflex capacity threshold value, reducing jejunal smooth muscle kinematic wave amplitude, reducing fecal water content, increasing serum K + content, reducing packed cell volume and the like and has the good effects in the aspect of inhibiting visceral hypersensitivity or relieving abnormal defecation caused by stress or irritable bowel, multiple measures are simultaneously taken in multiple pathological processes, the good treatment effect is achieved on IBS-C, IBS-D and IBS-A, a pure traditional Chinese medicine formula is adopted, and few side effects are produced.
Owner:新疆维吾尔自治区中药民族药研究所
A method for simulating sub-basin confluence based on the three-level structure of slope channels and channels
ActiveCN110717231BImprove the simulation effectGeometric CADGeographical information databasesHydrometryRiver routing
The invention discloses a sub-basin confluence simulation method based on a slope channel riverway three-level structure, and relates to the technical field of distributed hydrological model confluence simulation. The method comprises the following steps: extracting a river channel and a channel based on DEM data, and dividing drainage basin grids into slope grids, channel grids and river channelgrids according to categories; calculating the length of a confluence path from each grid to a basin outlet, and counting the number of channels and the average length of the channels according to thetypes of the channel grids; setting the confluence attribute of each grid in the drainage basin according to the riverway or channel grid into which each grid finally converges; and according to thegrid confluence attribute, determining equal-height zone slope, channel and river channel runoff distribution coefficients respectively, and adopting a motion wave equation as a basic simulation formula of slope, channel and river channel confluence to perform confluence simulation on the sub-basins and the equal-height zones. According to the method, the influence of the channel confluence process on water circulation can be considered, and the confluence process simulation effect is improved.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
A six-degree-of-freedom tank navigator suitable for submerged ice-breaking research
ActiveCN110926756BMotion Amplitude AdjustmentAdjust the range of motionHydrodynamic testingIce waterWave shape
Owner:JIANGSU UNIV OF SCI & TECH
A Method for Estimating Slope Roughness and Sediment Erosion Rate under Rainfall Conditions
ActiveCN110568152BEasy to getImprove universal applicabilityEarth material testingPermeability/surface area analysisSediment transportSoil science
The invention discloses a method for estimating slope surface roughness and sediment erosion rate under rainfall conditions, comprising: first establishing an infiltration model under rainfall conditions to obtain cumulative infiltration during the rainfall process; and then establishing a motion wave equation , combined with the cumulative infiltration, kinetic wave equation and water balance relationship to obtain the slope surface roughness and slope water depth; then establish the sediment transport equation, and determine the sediment erosion rate according to the measured rainfall data and slope water depth. Under a rainfall time, measure the flow rate and sediment volume per unit time at the outlet, and combine the relationship between flow velocity and water depth, as well as the relationship between rain intensity, water depth and sediment yield, to obtain the slope surface roughness and sediment yield. The erosion rate simplifies the parameter acquisition method of the infiltration process and improves the general applicability of the estimation results.
Owner:XIAN UNIV OF TECH
A three-dimensional frequency-domain numerical method for predicting drift loads of multi-floating structures
ActiveCN109344531BImprove convergence rateAccurately predict hydrodynamic coefficientsGeometric CADDesign optimisation/simulationKinematic waveEngineering
The invention provides a three-dimensional frequency domain numerical method for predicting the wave drift load of a multi-floating body structure. Read the grid file and use the grid information to calculate the hydrostatic force of the ship; calculate the influence coefficient matrix of the simple Green's function; calculate the influence coefficient matrix of the complex frequency-domain Green's function; apply the Taylor expansion boundary element method to solve the radiation velocity potential and surrounding The firing velocity potential and its spatial derivatives; the hydrodynamic coefficients of each unit of the multi-floating body structure; the equation of motion of the multi-floating body; the wave force and drift load of the whole of the multi-floating body structure and each unit; Carry out the analysis and calculation of the motion spectrum of floating bodies in irregular waves. The method of the invention can accurately predict the hydrodynamic coefficient, motion RAO, wave force, wave drift load in the six-degree-of-freedom direction and the motion spectrum analysis result of the floating body of each single body of the multi-floating body structure.
Owner:HARBIN ENG UNIV
An optimization design method of rainwater pipe network based on usrams
ActiveCN106650053BReliable Design ResultsSimple and fast to buildGeometric CADSpecial data processing applicationsKinematic waveEnvironmental engineering
An USRAMS-based optimization design method of a rainwater pipe network belongs to the crossing field of drainage pipe line design and hydraulic models. Aiming at the imperfection of the rational formula method and the requirements of the new version Outdoor Drainage Specifications, the invention is based on rainwater pipe network design data to establish a USRAMS rainwater pipe network hydraulic model; kinematic wave is adopted for simulating calculation; pipe section overload is used as the verification standard according to the model results; the design scheme is optimized according to the model results so that the reliability of rainwater pipe network design is increased. The number of required parameters is less and the parameters are easy to obtain; the runoff coefficient and the water catchment time can be directly obtained; the process of establishing models is simple and quick; the model results are reliable; the applicability of the method is guaranteed; the method has operability; complicated programming is not required; steps can be finished by means of present software; the operation is simple and easy; the feasibility of the invention is guaranteed.
Owner:BEIJING UNIV OF TECH
A Kinetic Wave Infiltration Method for Quantitatively Describing Preferential Flow Phenomena
ActiveCN109709015BSolve the difficult problem that cannot quantitatively describe the phenomenon of preferential flowPermeability/surface area analysisPreferential flowSoil science
The invention discloses a kinematic wave infiltration method capable of quantitatively describing preferential flow phenomena, and belongs to the field of soil hydrology. In this method, the soil moisture profile is divided into the preferential flow region and the matrix flow region, and an infiltration model is proposed in which the preferential flow region and the matrix flow region are bidirectionally coupled through the free water surface according to the kinetic wave infiltration theory. The infiltration method provided by the invention can reflect the change of wetting front and the mutual feed of soil moisture between preferential flow and matrix flow, solves the problem that it is difficult to quantitatively describe the phenomenon of preferential flow in the current infiltration method, and has strong engineering significance.
Owner:HOHAI UNIV
A Sub-basin Confluence Simulation Method Considering the Effect of Warping Dam
The invention discloses a sub-basin confluence simulation method considering the influence of a silt dam, and relates to the technical field of distributed hydrological model sub-basin confluence simulation. The method includes: adopting a sub-basin contour zone sleeving mode as a model basic calculation unit; dividing the sub-basins into equal-height zones with different numbers according to theelevation based on DEM; and counting relevant parameters, extracting channel grids, setting channel length thresholds, elimiating dummy channels, carrying out generalization on the silt dam in the equal-height zone and carrying out statistics on related parameters of the silt dam; carrying out slope confluence process simulation on each equal-height zone and caryring out confluence process simulation on sub-basin channels by adopting a kinematic wave equation, carrying out regulation and storage correction on channel confluence amount by adopting a silt dam water balance principle, and simulating a riverway confluence process by adopting the kinematic wave equation. According to the method provided by the invention, the influence of silt dam construction in the calculation unit on the confluence process can be simulated.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Estimation Method of Slope Surface Roughness and Soil Moisture Absorption Rate under Rainfall Conditions
InactiveCN105138761BDetermination of moisture absorptionSpecial data processing applicationsSoil scienceEstimation methods
Owner:XIAN UNIV OF TECH
Large-scale typhoon flood simulation and calculation method
PendingCN113779814AImprove applicabilityComputationally efficientDesign optimisation/simulationSpecial data processing applicationsHydrometryData set
The invention discloses a large-scale typhoon flood simulation and calculation method. The method comprises the following steps of firstly, generalizing a grid into an upper-layer soil aquifer and a lower-layer soil aquifer by using the spatial data sets, such as landform, soil texture, land utilization, etc., as a basis for model calculation based on a grid distributed hydrological simulation method; considering the rainfall, evaporation, excess infiltration runoff, full storage runoff, soil lateral flow and drainage water flow towards an underground aquifer on each grid, wherein the lateral flow comprises the lateral flow flowing into the grid from the upstream grid, the lateral flow flowing to the downstream grid from the grid and the groundwater runoff; on the basis of runoff production calculation, adopting an improved kinematic wave backflow calculation method to carry out simulation calculation on the backflow of a slope and a river channel. According to the method, in the large-scale typhoon flood simulation calculation, high calculation efficiency and certain accuracy are displayed, and the problem of balance between accuracy and timeliness is solved.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Mixed containing cavity heat dissipation gas wave refrigerating machine
ActiveCN101762110BShorten the receiving tube lengthDissipativeCompression machinesShock waveKinematic wave
Owner:DALIAN UNIV OF TECH
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