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40 results about "Flood stage" patented technology
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Flood stage is the level at which a body of water's surface has risen to a sufficient level to cause sufficient inundation of areas that are not normally covered by water, causing an inconvenience or a threat to life and/or property. When a body of water rises to this level, it is considered a flood event. Flood stage does not apply to areal flooding. Because areal flooding occurs, by definition, over areas not normally covered by water, any water at all creates a flood. Usually, Moderate and Major stages are not defined for areal floodplains.
Optimization method for joint flood dispatching of cascade reservoirs coupled with flood control and power generation
InactiveCN102296562AImprove power generation revenueImprove power generation efficiencyClimate change adaptationMarine site engineeringControl objectiveEngineering
The invention discloses a cascade reservoir combined flood scheduling optimization method coupled with flood control and power generation, which can coordinate flood control and power generation goals in flood scheduling, and adopt corresponding models for different standard floods, timely power generation pre-discharging and closing gates and staggered peaks, reducing flood seasons It is useless to abandon water to maximize the benefits of cascade reservoir flood control and power generation. The technical solution is: judge the level of the flood according to the real-time hydrometeorological information and flood forecast results. When the average inflow flow during the flood period is greater than the full flow of the power station, it will be judged as a major flood, otherwise it will be judged as a small flood; according to the different levels Different models are used to optimize the scheduling of different control objectives; under each different flow, constraint settings and control objectives, a number of different flood control schemes are obtained, which constitute a set of flood control schemes corresponding to a flood, as the basis for decision-making, if In the flood control scheme set, it is necessary to modify the inflow flow, so the simulated flood control calculation under various inflow conditions is repeated.
Owner:EAST CHINA GRID +3
Normalized and animated inundation maps
ActiveUS6947842B2Accurate forecastAccurate predictionWeather condition predictionClimate change adaptationAnimationFlood stage
Methods and systems for normalizing flood warnings and potential flood levels across multiple river gauges by converting localized flood stage levels to a datum-based normalized value are disclosed. The normalized flood levels can then be used to plot flood levels from multiple river gauges on an inundation map. Methods and systems are also disclosed for creating animated inundation maps that illustrate flood levels geographically, and may include an indication of the certainty that flooding will reach one or more of the indicated flood levels through the use of multiple colors, shades, dithering, or the like.
Owner:USER CENTRIC IP
Full-section water wetland purification system suitable for normal water level of river
InactiveCN102061677AReduce floodingEfficient purificationBarrages/weirsHydraulic engineering apparatusRiver routingWater flow
The invention discloses a full-section water wetland purification system suitable for a normal water level of a river. The system comprises four parts, namely an overflow weir, a water distribution dike, a wetland for purifying water and a main flood period overflowing river. In low water seasons and the normal water level, all the water from the upstream flows through the wetland, thus the system can play a role in purifying the water; and at a flood period, the water level exceeds the overflow weir, the water flows through all sections, a narrow trapezoidal diversion port constructed in the system plays roles of water bundling and damming during the flood, the resistance is higher if the flood is greater, and more flood is compelled to flow to the wider and tendency-along flood discharge trunk river so as to reduce the flood flow of the wetland on the premise of not obstructing the flood discharge capacity and effectively protect the wetland. Moreover, according to the specific terrain of the river, structure forms of the wetland purification system can be connected in series so that the river water can be subjected to multistage purification. The construction method can be used for effectively purifying the water.
Owner:HOHAI UNIV
Method for creating three-stage flow passage of meandering riverway in lower Yellow River
InactiveCN101713178AEnhance flood and sediment transport capacityAvoid collisionStream regulationThree stageFlood stage
The invention relates to a method for creating a three-stage flow passage of a meandering riverway in the lower Yellow River, of which the International Patent Classification (IPC) is E02B1 / 00 and E02B3 / 02. The method comprises the following steps of: constructing a control-guide engineering dam which comprises spur dikes made of waterproof earth-rock dams according to the radius of a river bend at the outermost side of a main design riverway; constructing a submerged dam at the chuting section at the tail part of the control-guide engineering dam, wherein the crest elevation is equal to the regulated-flow water level, and the top of the submerged dam is provided with a scour prevention facility; and distributing permeable pile dam at the two sides in a medium-size channel of a straight river section between two bends, wherein the crest elevation of the pile dam is the same as the water level with the local flow of 800m3 / s. The three-stage flow passage created by the method can control the river pattern flow passages in different states of the small-size flow passage, medium-size flow passage and flood period, realize the river stability, enhance the capabilities of releasing flood and transferring sands in the riverway, and prevent the Yellow River levee from avulsion, breakdown and other dangerous situations, thereby achieving the goal of the comprehensive treatment of the riverway in the lower Yellow River.
Owner:YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
Buried type anti-flood wall driven by lifting push rod
ActiveCN107653836AEasy to useTo achieve the role of flood control and flood protectionDamsDykesMarine engineeringFlood stage
The invention discloses a buried type anti-flood wall driven by a lifting push rod. The buried type anti-flood wall comprises a water stopping plate, a lower rotary shaft and a supporting mechanism. The water stopping plate is hinged to the surface of a foundation, and the supporting mechanism is arranged on the backwater side of the water stopping plate. A ground leakage channel is formed in oneside of the upstream face of the water stopping plate, a floating ball slideway and a push rod receding area are arranged below the water stopping plate, and the floating ball slideway communicates with the ground leakage channel. The lifting push rod is fixed to the middle of a cross slide block in a penetrating mode, and a water draining pipe is arranged at the bottom of the push rod receding area or the floating ball slideway. The buried type anti-flood wall can be in a hidden state at a normal non-flood stage, and normal using of the channel is not influenced. When flood comes, after onlya small amount of flood enters a ground leakage at the early stage, the floating ball slideway can be filled with water, and under the buoyancy of floating balls, the water stopping plate is driven tobe unfolded upwards, thus the effects of flood resisting and preventing are achieved, and the buried type anti-flood wall is good in using effect and extremely suitable for being applied and popularized.
Owner:NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
Once-closure and staging-closure combined dam type power plant construction diversion method
ActiveCN104032714APrevent buildupShorten the power generation periodBarrages/weirsDry seasonCofferdam
The invention relates to a once-closure and staging-closure combined dam type power plant construction diversion method and aims to reduce technical difficulty and risk, control construction flood season water level, reduce engineering cost and shorten generation period. The technical scheme includes steps of a, respectively building an entrance cofferdam and an exit cofferdam at the entrance and the exit of a diversion tunnel to be built on the first bank of a riverway; b, constructing the diversion tunnel, and excavating part of a first-stage foundation pit on the dry land on the first bank of the riverway; c, dismantling the entrance cofferdam and the exit cofferdam; d, constructing an upstream dry-season sub-cofferdam and a downstream dry-season sub-cofferdam of a once-closure riverbed on the riverway; e, constructing a longitudinal annual water-retaining cofferdam distributed along the riverway in the first-stage foundation pit close to the bank of the riverway by means of a dry season, and planning to excavate the second-stage foundation pit on the other side of the longitudinal annular water-retaining cofferdam; f, constructing behind-dam power generation plant in the dry season and the flood period in the first-stage foundation pit, and constructing a dam flood-discharge section in the second-stage foundation pit in the dry season.
Owner:POWERCHINA HUADONG ENG COPORATION LTD
Backwash combination type farmland non-point source pollution cut-off purification system
InactiveCN103011497AProlong settling timeIncrease hydraulic retention timeBarrages/weirsClimate change adaptationTerrainEngineering
The invention discloses a backwash combination type farmland non-point source pollution cut-off purification system. Emergent aquatic plants and algae are arranged in gradient by virtue of structures such as guide downflow weir, backwash vertical filler, ecological settling pit which are constructed by using a part of canal (creek) beds, so that a physical-plant-microorganism ternary stereo purification system is formed, the hydraulic power condition in the canal (creek) can be greatly improved, the hydraulic power staying time can be prolonged, and the farmland non-point source pollutant can be effectively blocked and settled and finally decomposed and purified in the ecological settling pit in the synergic action of organisms; the backwash vertical filler is reversely placed regularly to automatically remove clogging, and the blocking effect can be in effect continuously, so that manual management operation can be reduced; and the purification system does not influence flood discharge of the canals (creeks) under a condition of heavy rain run-off or flood stage. The cut-off purification systems can be used in a mode of serial connection according to particular terrain and topography, so that the water body can be purified in multiple stages.
Owner:TIANJIN UNIV
Ecological river and treatment method thereof
InactiveCN107956214ASolve the problem of flood drainageHabitat maintenanceStream regulationBiological water/sewage treatmentRiver routingEmergent plant
The invention provides a ecological river comprising an old river course and a new river course. The ecological river is characterized in that one end of the old river course is provided with a riverloop starting point, while the other end is provided with a river loop endpoint; both ends of the new river course are respectively connected with the river loop starting point and the river loop endpoint; the old river course and the new river course are respectively provided with an old river gate and a new river gate on the river loop starting point; a plurality of repair units are disposed onthe old river course; submerged plants are arranged between the repair units; a deep pool with the submerged plants inside is arranged in the center of the new river course; emergent plants are arranged around the deep pool. The ecological river and treatment method thereof have the advantages that with the old river course retained after the transformation of cutting and straightening the river,staging deployment of upstream water is implemented through the control of the two gates; flood drainage problem can be effectively solved when the new river gate is opened during the flood season; the original habitat of the river and the self purification capacity of the water body are maintained in the non-flood period as the upstream water mainly passes through the old river.
Owner:CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
Tidal waterway gate pump dispatching method and ecological restoration for tidal waterway
InactiveCN107354910AAccelerated dilutionImprove self-cleaning abilityWater resource protectionStream regulationRiver mouthDry season
The invention discloses a tidal waterway gate pump dispatching method and an ecological restoration for a tidal waterway. The tidal waterway gate pump dispatching method comprises the steps that in the waterway dry season, a gate of a river mouth is closed; in the waterway flood period, when the tide is located at the low tide level, the gate of the river mouth is opened, flood is discharged into the sea, and water flows into the sea in one direction; and in the waterway flood period, when the tide is located at the high tide level, the gate of the river mouth is closed, the flood is discharged into the sea through a pump station, and the water flows into the sea in one direction. According to the tidal waterway gate pump dispatching method, the water gate, the pump station and other water conservancy facilities in the river network area are utilized, the water conservancy facilities are combined with regulation and control measures, reciprocating flow is changed into one-way flow, it is guaranteed that the upstream water body of the waterway is not jacked by the tide, and the discharging speed is increased; meanwhile, the dilution and self-cleaning functions of the water body are improved, the virtuous cycle is formed, the problem that the tidal river network is subjected to dual actions of tide and runoff, and pollutants flow in the river network area in a reciprocating manner is solved, and meanwhile the effect of tidal river section ecological restoration is improved.
Owner:广州泰通环保科技投资有限公司
Siltation-preventing water intake facility achieving automatic flood prevention and pollution discharge
InactiveCN104831689AImprove anti-clogging effectEasy to clean manuallyBarrages/weirsTap waterWater flow
The invention discloses a siltation-preventing water intake facility achieving automatic flood prevention and pollution discharge. The siltation-preventing water intake facility comprises a sand flushing slope, an overflow dam, a water collection groove and a setting basin. The sand flushing slope is arranged between connected mountains. A flood-preventing dam is arranged on the left side of the sand flushing slope, the overflow dam is arranged on the right side of the sand flushing slope, a sand turning nozzle is arranged between the sand flushing slope and the flood-preventing dam, the water collection groove is formed in the sand flushing slope in the water flow direction and matched with the sand flushing slope in a bearing mode, an overflow slope is arranged in the direction, parallel to the sand flushing slope, of the water collection groove, the right side of the water collection groove is provided with the overflow dam, the left side of the water collection groove is led to a residue filter bed, the residue filter bed is provided with an overflow groove in the water flow direction and matched with the overflow groove in a bearing mode, a water stop dam is arranged at the front end of the overflow groove, the overflow groove is connected with the setting basin, and the setting basin is provided with a water intake gate and a sand discharge gate. The water intake problems of a mountain river hydropower station, a tap water plant and farm irrigation are fundamentally solved, and the purposes that siltation and blockage are never caused on a water intake dam in the flood period, and natural water intake is achieved in the drought period are achieved.
Owner:杨建能
Method for creating three-stage flow passage of meandering riverway in lower Yellow River
InactiveCN101713178BEnhance flood and sediment transport capacityAvoid collisionStream regulationThree stageFlood stage
Owner:YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
Flood staging time determination method
ActiveCN110738407AImprove accuracyAvoid subjective arbitrarinessClimate change adaptationResourcesAlgorithmFlood stage
The invention provides a flood staging time determination method. The flood staging time determination method comprises the steps of flood peak scatter diagram plotting, flood peak scatter upper and lower outsourcing line drawing, upper and lower outsourcing line overlapping section or minimum distance section determination and flood staging time calculation. According to the method, the distribution, magnitude and conversion point conditions of the flood peak occurrence time can be fully considered, and the flood time segmentation point determination accuracy is improved; according to the method, the flood stages can be obtained through calculation, and subjective randomness of time point determination of a conventional analysis method is avoided.
Owner:BUREAU OF HYDROLOGY CHANGJIANG WATER RESOURCES COMMISSION
Water taking system for shallow water river in water-depleted mountainous area
ActiveCN111255015AIncrease turbidityStable water productionWater conservationMaterial dimension controlWater qualityTurbidity
The invention discloses a water taking system for a shallow water river in a water-depleted mountainous area. The system involves an overflow weir, a water taking chamber and a radiation well, whereina spillway grid is arranged at an inlet of the water taking chamber, a floating mushroom head automatic water taking device and an on-line turbidity meter are arranged in the water taking chamber, and a submersible pump is arranged in the radiation well. When flooding does not occur, the overflow weir lifts the water level of the shallow water river, river water flows into the water taking chamber through the spillway grid, and then enters a water conveying pipe from the floating mushroom head automatic water taking device to flow to the radiation well, and finally, the submersible pump conveys the river water to a subsequent water purifying structure; a drought period relies on joint recharge of the above mentioned surface water recharge mode and the seepage of the radiation well; when the on-line turbidity meter in the water taking chamber during a flood period is displayed higher than 5 NTU, the on-line turbidity meter feeds back a signal to a self-control system, an electric butterfly valve mounted on the water conveying pipe is closed, and the radiation well supplies water through the self-seepage; according to the water taking system, the water supply amount of the shallow water river in the water-depleted mountainous area can be ensured, the water quality is reliable, the service life of the water taking system is prolonged, and the water taking cost is reduced.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
Flood staging determination method based on multiple characteristic indexes
PendingCN113626500ADetermine the stagingDigital data information retrievalClimate change adaptationAlgorithmGenetics algorithms
The invention discloses a flood staging determination method based on multiple characteristic indexes. The method comprises the following steps of dividing calculation time periods, selecting multi-feature indexes, constructing a projection index function, solving an optimal projection direction, calculating projection values of all the time periods and determining flood stages through ordered clustering. The method comprises the following steps: a projection index function is established by adopting a plurality of characteristic indexes capable of reflecting drainage and flood characteristics of a drainage basin on the basis of clearing the flood season duration of the drainage basin; then, through an accelerated genetic algorithm, a projection value which enables the projection index function to reach an optimal value is found, and through an ordered clustering analysis method, clustering analysis is carried out on the projection value; therefore, the flood staging is determined more objectively, and the defects of single analysis factor and subjective arbitrariness in a conventional analysis method are effectively avoided.
Owner:BUREAU OF HYDROLOGY CHANGJIANG WATER RESOURCES COMMISSION
Construction method of high-fall deepwater rock-socketed foundation
The invention discloses a construction method of a high-fall deepwater rock-socketed foundation. The construction method comprises the following steps that when a water level is lower than a preset height, a riverbed is cleaned to form a foundation pit operation area; a double-wall steel cofferdam is assembled, a bottom tray is arranged at the bottom of a blade foot of the double-wall steel cofferdam, a bottom section steel casing and a drilling platform steel pipe pile are fixed to the inner wall of the blade foot, a temporary platform is arranged on the top of the blade foot, and blade foot concrete is poured into a wall bin; the whole double-wall steel cofferdam is put into a river through an air bag method, and the bottom tray is dismantled after preliminary positioning; after accurate positioning is conducted, the double-wall steel cofferdam sinks for implantation; construction of leaking stoppage sand bags in the bottom section steel casing and construction of bottom sealing concrete in the cofferdam are conducted, and the temporary platform is dismantled; and the steel pipe pile is heightened, a drilling platform is erected, a small-diameter tool steel casing is inserted and hit in the bottom section steel casing, drilling pile construction is conducted in the flood period, the concrete is poured into the double-wall steel cofferdam wall bin in good time, and bearing platform construction is conducted after water is pumped in the cofferdam in the dry season. The construction method is high in construction efficiency and small in drilling platform work amount; the small-diameter tool steel casing can be used inversely, so that the construction cost is low.
Owner:CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
Floating anti-flood wall
InactiveCN105970877ADoes not affect continuationQuality improvementDamsClimate change adaptationFlood stageBuoy
Owner:江汇
Full-section water wetland purification system suitable for normal water level of river
InactiveCN102061677BReduce floodingEfficient purificationBarrages/weirsHydraulic engineering apparatusRiver routingWater quality
The invention discloses a full-section water wetland purification system suitable for a normal water level of a river. The system comprises four parts, namely an overflow weir, a water distribution dike, a wetland for purifying water and a main flood period overflowing river. In low water seasons and the normal water level, all the water from the upstream flows through the wetland, thus the system can play a role in purifying the water; and at a flood period, the water level exceeds the overflow weir, the water flows through all sections, a narrow trapezoidal diversion port constructed in thesystem plays roles of water bundling and damming during the flood, the resistance is higher if the flood is greater, and more flood is compelled to flow to the wider and tendency-along flood discharge trunk river so as to reduce the flood flow of the wetland on the premise of not obstructing the flood discharge capacity and effectively protect the wetland. Moreover, according to the specific terrain of the river, structure forms of the wetland purification system can be connected in series so that the river water can be subjected to multistage purification. The construction method can be used for effectively purifying the water.
Owner:HOHAI UNIV
Water diversion and drainage bidirectional pressure tunnel
PendingCN111305172AEasy to operate and manageSave landWater-power plantsHydro energy generationRiver routingStream flow
The invention discloses a water diversion and drainage bidirectional pressure tunnel. The water diversion and drainage bidirectional pressure tunnel comprises a water inlet pool section, an inlet pressure box culvert section, an inlet service gate, a pressure tunnel body section, an outlet pressure steel pipe section, an outlet control gate and a water diversion pump station. In the flood period,a working valve of the water diversion pump station is closed, and flood passes through the pressure tunnel and is controlled by the outlet control gate to drain the flood to a drainage area; and in the dry season, the outlet control gate is closed, and the water diversion pump station lifts water to a river channel through the pressure tunnel. Water diversion and drainage share the same tunnel, the tunnel function is not single any more, and the engineering operation management is facilitated while the land is saved, the engineering investment is greatly saved, and the economic benefits are remarkable.
Owner:浙江省水利水电勘测设计院有限责任公司
Flood disaster situation assessment method based on vector guidance
PendingCN113920338AQuick extractionRapid Decision SupportClimate change adaptationCharacter and pattern recognitionFlood stageData needs
The invention discloses a flood disaster situation assessment method based on vector guidance. The method comprises the steps of water body extraction, vector guidance, flood inundation range determination and flood disaster loss estimation. According to the method, the water body range is obtained through the flood period remote sensing image, then the water body range is matched with the geographic vector data to quickly position the flood site, disaster damage assessment can be performed to obtain disaster damage information, disaster information can be quickly extracted under the condition of overcoming the limitation of processing resources, implementation is simple and quick, the required cost is low, the auxiliary function of geographic vector information is utilized, coordination ability inside and among different data is fully and deeply excavated, flood disaster assessment is achieved, data needed in the assessment process is less, analysis is simple and convenient, compared with an existing assessment method, the efficiency is higher and more accurate, processing is conducted based on 0-level or 1-level data, and rapid decision support can be provided for disaster reduction and relief services.
Owner:CHENGDU UNIV OF INFORMATION TECH +1
Grass slope water entry type ecological bank protection structure of mountain river channel
PendingCN114541324ARestoring multiple natural propertiesQuickly restore multi-layered plant communitiesLife-buoysClimate change adaptationRiver routingDry season
Owner:广州市水务规划勘测设计研究院有限公司
Movable flood control dam for cities
The invention relates to a hydraulic building device, in particular to a movable flood control dam for cities. The movable flood control dam comprises a flood control plate and a supporting device which are disposed in a groove in the shape of a Chinese character 'ao', a foundation supporting frame with a conical top is arranged on one side of the ao-shaped groove, flood control plate brackets are mounted at the bottom and on one side of the ao-shaped groove, the top of the other side of the ao-shaped groove is in the shape of a step, the floor control plate is fixed on the flood control plate brackets by means of hard connection, a fixing end of the flood control plate is matched with the top of the foundation supporting frame while the tail end of the same is fixed at the upper end of the step of the ao-shaped groove in a clamped manner, the floor control plate is fixed in the ao-shaped groove in a clamped manner and is flush with the ground, and the supporting device is arranged on the lower portion of the flood control plate. The flood control plate and the supporting device are matched with the ao-shaped groove in corresponding shape, the flood control plate is erected to withstand flood at a flood stage and fixed in the ao-shaped groove in the ground in a clamped manner at a normal stage, and the movable flood control dam is flush with the ground, thereby being attractive, conducive to maintaining normal life of the cities and free of causing inconvenience to people's life.
Owner:YANTAI SUNNY RUBBER
Flood drainage method for construction period and operation period of channel type waste slag field
The invention relates to a flood drainage method for the construction period and the operation period of a channel type waste slag field, and belongs to the field of water conservancy and hydropower engineering. Before slag stacking, a drainage blind ditch is built at the bottom of the slag field; in the slag stacking period, a temporary flood drainage channel is reserved on the slag face, close to the hillside, of one side of the slag field, the upstream flood of the slag field is intensively drained to the downstream of the slag field, after the slag face is filled with a certain height, the temporary flood drainage channel is backfilled in the non-flood period, a temporary flood drainage channel of the filled slag face is reserved, it is guaranteed that a new flood drainage channel is formed in the slag stacking body in the next flood period, and the steps are repeated till slag discarding is finished; and after slag stacking is completed, a permanent flood drainage channel is built at the top of the slag field close to the mountain. The method has the advantages that the flood drainage channel is built on the slag surface, the construction is safer, simpler and faster, and the cost is low; a flood drainage channel is built on the slag surface, disturbance to hillsides on the two sides is reduced, and water and soil loss can be reduced; and the flood drainage channel is built on the slag surface, and land acquisition for building the flood drainage channel on the hillsides on the two sides is reduced.
Owner:CHINA WATER NORTHEASTERN INVESTIGATION DESIGN & RES
A Method for Determining Flood Stage Time
ActiveCN110738407BImprove accuracyAvoid subjective arbitrarinessClimate change adaptationResourcesAlgorithmFlood stage
The invention provides a method for determining the time of flood stages, including point drawing of a flood peak scatter diagram, drawing of the upper and lower outer lines of the scatter points of the flood peak, determination of the overlapping section or the minimum distance section of the upper and lower outer lines, and calculation of the flood stage time; the method can fully consider the flood peak. The distribution, magnitude and transition point of occurrence time improve the accuracy of determining the flood time division point; this method can obtain flood stages by calculation, avoiding the subjective arbitrariness of time point determination in conventional analysis methods.
Owner:BUREAU OF HYDROLOGY CHANGJIANG WATER RESOURCES COMMISSION
Remote sensing-based dynamic estimation method for outflow process of ungauged free overflow reservoir
A remote sensing-based dynamic estimation method for the outflow process of an ungauged free overflow reservoir comprising the following steps: estimating the storage volumes of the water reservoir at different water levels from the water level-area relation curve of the water reservoir by using a digital elevation model, and thereby establishing an area-storage volume relation curve of the water reservoir; obtaining the storage volumes of the water reservoir at the corresponding times; obtaining the change of the storage volume of the water reservoir through accumulative calculation on the change of the storage volume in the time periods corresponding to the two remote sensing images; gradually approximating an outflow coefficient of the water reservoir by using a bisection method; taking the final approximation result as the outflow coefficient of the ungauged reservoir, and calculating the outflow process of the water reservoir during floods.
Owner:HOHAI UNIV
Backwash combination type farmland non-point source pollution cut-off purification system
InactiveCN103011497BProlong settling timeIncrease hydraulic retention timeBarrages/weirsClimate change adaptationTerrainEngineering
The invention discloses a backwash combination type farmland non-point source pollution cut-off purification system. Emergent aquatic plants and algae are arranged in gradient by virtue of structures such as guide downflow weir, backwash vertical filler, ecological settling pit which are constructed by using a part of canal (creek) beds, so that a physical-plant-microorganism ternary stereo purification system is formed, the hydraulic power condition in the canal (creek) can be greatly improved, the hydraulic power staying time can be prolonged, and the farmland non-point source pollutant can be effectively blocked and settled and finally decomposed and purified in the ecological settling pit in the synergic action of organisms; the backwash vertical filler is reversely placed regularly to automatically remove clogging, and the blocking effect can be in effect continuously, so that manual management operation can be reduced; and the purification system does not influence flood discharge of the canals (creeks) under a condition of heavy rain run-off or flood stage. The cut-off purification systems can be used in a mode of serial connection according to particular terrain and topography, so that the water body can be purified in multiple stages.
Owner:TIANJIN UNIV
Folding plate structure for dam protection during flood period and mounting and using method thereof
PendingCN113981891AEasy to fixEasy to foldDamsClimate change adaptationArchitectural engineeringFlood stage
The invention relates to the technical field of dam flood control, and discloses a folding plate structure for dam protection during a flood period, the folding plate structure comprises a water baffle assembly and a group of triangular support frames arranged in parallel, and the front ends of the group of triangular support frames are jointly connected with a group of folding frames; the rear ends of one set of triangular support frames are jointly connected with one set of upper reinforcing rod assemblies, and the lower ends of one set of triangular supporting frames are jointly connected with one set of lower reinforcing rod assemblies. The water baffle assembly, the triangular supporting frames, the folding frames, the upper reinforcing rod assemblies and the lower reinforcing rod assemblies are all convenient to fold and store, so that installation on a construction site is facilitated, the folding plate structure is light and small in occupied area, the angle of the triangular supporting frame can be adjusted, practicability is high, the folding plate structure can be repeatedly used, the strength is high, and deformation is not prone to occurring. The triangular supporting frame can be firmly fixed through fasteners, and the triangular supporting frame can be used for flood prevention or isolation of polluted soil and is suitable for places lacking soil materials and sand bags.
Owner:EAST CHINA UNIV OF TECH
Method for determining drainage flow of drainage pump station
PendingCN114492035AAccurate calculation of drainage flow valueThe phenomenon of not being able to drain waterlogging at full capacityDesign optimisation/simulationSpecial data processing applicationsStream flowFlood stage
The invention discloses a flood drainage flow determination method of a flood drainage pump station. The method comprises the following steps: step 1, determining a flow process boundary of the upstream of a waterlogging area in a flood period and a water level process boundary of the downstream of the waterlogging area in the flood period; step 2, determining the initial adjustment water level value of the waterlogging area; calculating channel excess flow corresponding to different inland river water levels in the waterlogging area; 3, a plurality of drainage flow values are selected, and an inland river water level-inland river volume relation curve under different pump drainage flows is obtained through calculation; 4, the highest inland river water level corresponding to each drainage flow value is obtained; and 5, comprehensively considering, selecting an optimal scheme, and taking the pump drainage flow in the scheme as the drainage flow value of the drainage pump station. The invention provides an efficient and simple pump station scale design method, and the method can avoid the phenomena that waterlogging occurs in an upstream waterlogging area and a waterlogging drainage pump station at the downstream of the waterlogging area cannot run at full load in a pump station design stage.
Owner:PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
A water intake system for shallow rivers in water-poor mountainous areas
ActiveCN111255015BReduce water permeabilityStable water productionWater conservationMaterial dimension controlControl systemWater quality
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
Construction diversion method of dam-type hydropower station combined with one-time interception and stage-by-stage interception
ActiveCN104032714BPrevent buildupShorten the power generation periodBarrages/weirsDry seasonFlood stage
The invention relates to a once-closure and staging-closure combined dam type power plant construction diversion method and aims to reduce technical difficulty and risk, control construction flood season water level, reduce engineering cost and shorten generation period. The technical scheme includes steps of a, respectively building an entrance cofferdam and an exit cofferdam at the entrance and the exit of a diversion tunnel to be built on the first bank of a riverway; b, constructing the diversion tunnel, and excavating part of a first-stage foundation pit on the dry land on the first bank of the riverway; c, dismantling the entrance cofferdam and the exit cofferdam; d, constructing an upstream dry-season sub-cofferdam and a downstream dry-season sub-cofferdam of a once-closure riverbed on the riverway; e, constructing a longitudinal annual water-retaining cofferdam distributed along the riverway in the first-stage foundation pit close to the bank of the riverway by means of a dry season, and planning to excavate the second-stage foundation pit on the other side of the longitudinal annular water-retaining cofferdam; f, constructing behind-dam power generation plant in the dry season and the flood period in the first-stage foundation pit, and constructing a dam flood-discharge section in the second-stage foundation pit in the dry season.
Owner:POWERCHINA HUADONG ENG COPORATION LTD
A construction method for deep-water rock-socketed foundation with high drop
The invention discloses a construction method of a high-drop deep-water rock-socketed foundation. When the water level is lower than a predetermined height, the river bed is cleared to form a foundation pit operation area; a double-wall steel cofferdam is assembled, and the bottom of the blade foot of the double-wall steel cofferdam The bottom tray is set, the inner wall is fixed with the bottom section steel casing and the steel pipe pile of the drilling platform, and the top is provided with a temporary platform, and the wall warehouse is filled with concrete with blade feet; the double-wall steel cofferdam is put into the river as a whole by the air bag method, After preliminary positioning, the bottom tray is removed; after precise positioning, the double-walled steel cofferdam is sunk and planted on the bed; construction of sand bag plugging in the steel casing of the bottom section, bottom sealing concrete construction in the cofferdam, removal of the temporary platform; connection of high steel pipe piles, Set up a drilling platform, insert a small-diameter tool steel casing into the steel casing of the bottom section, carry out bored pile construction during the flood period, pour concrete into the double-wall steel cofferdam wall bin in a timely manner, and carry out bearing work after pumping water in the cofferdam during the dry season. platform construction. The construction efficiency of the method is high, and the engineering quantity of the drilling platform is small; the small-diameter tool steel casing can be used backwards, and the construction cost is low.
Owner:CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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