28 results about "Flood regulation" patented technology

The invention discloses a river and lake regulation and storage system flood routing intelligent forecasting method based on a dynamic storage and discharge relation, and the method comprises the steps: constructing a space-time dynamic association diagram structure which reflects the waterpower relation of a drainage basin, and mapping multi-source hydrological data to generate a model input set with a unified space-time scale; establishing an aggregation reservoir parameterized structure model which comprises a dynamic water level-reservoir capacity relation driven by inflow change characteristics and a composite water level-flow relation integrating a time lag effect and backwater jacking feedback; constructing a flood regulation calculation equation set, and according to the real-time delay state in the composite relationship, adopting an adaptive solution mechanism to switch among different algorithm channels so as to solve the equation set; and correcting the model state by using the real-time observation data and executing rolling prediction. The method effectively solves the problems that in a complex river and lake system, dynamic characteristics of the storage and discharge relation are difficult to depict, the non-in-phase evolution process is unstable to solve, and high-dimensional parameters are difficult to calibrate, and the continuity and physical consistency of flood forecasting are improved.

The application provides a built hydropower station operation water level lifting method based on staged design flood, comprising: analyzing flood seasonal variation law of a target hydropower station reservoir, carrying out flood staging on the target hydropower station reservoir flood, and proposing design flood and design flood hydrograph of different periods; constructing a hydropower station reservoir area water surface line calculation model, combining the design flood of the target hydropower station reservoir to calculate the reservoir water surface line under each starting push water level of different periods; constructing a hydropower station flood regulation model, combining the design flood hydrograph of the target hydropower station reservoir to calculate the reservoir highest flood regulation water level under each starting regulation water level of different periods; based on the reservoir water surface line and the highest flood regulation water level, combing the water level lifting opportunity, the water level lifting scheme is drafted. Through the application, the problem that the existing related technology cannot fully tap the comprehensive benefits of the project is solved.

The invention discloses a pumped storage power station flood regulation control method for water exchange between a lower reservoir sand blocking reservoir and a special reservoir, belongs to the technical field of water conservancy project and pumped storage power station flood control design, and aims to solve the problem that dynamic water exchange between the sand blocking reservoir and the special reservoir and multiple uncertain factors are difficult to process in an existing flood regulation calculation technology. Structuring and storing physical and hydraulic characteristic parameters of the power station by constructing an engineering parameter database; generating a state space set covering all potential unfavorable combinations based on a discretization principle; executing nested iterative calculation for each working condition, and dynamically calculating the water balance of the two reservoirs and the exchange flow driven by the water level difference; and finally, flood regulation high water levels of the sand blocking reservoir and the special reservoir are determined through global search. According to the method, the flood process, power generation dispatching and inter-reservoir hydraulic connection are systematically considered, the accuracy of flood regulation calculation and the engineering safety are effectively improved, and a reliable basis is provided for reservoir flood control design of the pumped storage power station with the sediment storage dam.

The invention provides a reservoir spillway flood regulation calculation method and device and electronic equipment, and the method comprises the steps: firstly selecting a reservoir original design flood hydrograph of a frequency corresponding to a target standard, then selecting a gate control working condition of a reservoir spillway, and carrying out the regulation calculation of the flood of the reservoir spillway based on the reservoir original design flood hydrograph and a reservoir original discharge capacity curve; and determining a reservoir design flood hydrograph and a reservoir discharge capacity curve corresponding to the gate control working condition, and then performing flood regulation calculation by adopting a water balance method based on the gate control working condition, the reservoir design flood hydrograph, the reservoir discharge capacity curve, the normal storage level of the reservoir and the water level storage capacity curve of the reservoir to obtain a reservoir flood regulation hydrograph. By adopting the method, the efficiency and the accuracy of reservoir flood regulation calculation can be improved, so that the working efficiency of reservoir project spillway type comparison and selection can be improved.

The application provides a method for determining a scheduling mode of reservoir flood control storage capacity released in stages at the end of flood season, and relates to the technical field of reservoir scheduling. The method comprises the following steps: collecting and arranging basic data, including hydrological and meteorological data, information of flood protection objects downstream, and data of reservoir scheduling parameters; determining a release time of reservoir flood control storage capacity based on multiple factor conditions; determining a release discrimination index of reservoir flood control storage capacity according to water level characteristics of a flood control station; carrying out risk analysis and risk atlas drawing of reservoir flood control storage capacity release; and determining a recommended flood control storage capacity release scheduling mode according to the flood control risk atlas. The application determines the release time of reservoir flood control storage capacity and the corresponding discrimination index by comprehensively considering multiple factor conditions, and draws a downstream flood control risk atlas on the basis of flood regulation calculation, and finally determines the recommended flood control storage capacity release scheduling mode in stages, which is of great significance for flood resource utilization at the end of flood season, improvement of reservoir storage guarantee rate, guarantee of downstream flood control safety and water safety.

The invention discloses a flood control project emergency disposal management method and system, and belongs to the technical field of flood control projects. The method comprises the following steps: collecting meteorological data and hydrological data; preprocessing the meteorological data and the hydrological data to obtain a complete meteorological data set and a complete hydrological data set; performing feature extraction on the complete meteorological data to obtain meteorological feature data; training a rainfall forecasting model for predicting rainfall based on the meteorological characteristic data, and generating rainfall forecasting data through the rainfall predicted by the trained rainfall forecasting model; forecasting calculation is carried out based on the complete hydrological data set and the rainfall forecasting data, and a forecasting scheme is generated; performing optimal scheme evaluation on the forecasting scheme to obtain an optimal forecasting scheme; and flood scheduling is carried out based on the optimal forecasting scheme. The flood control emergency response speed and accuracy are greatly improved.

The application discloses a flood scheduling gate operation logic anti-misoperation method and device based on rule self-learning, and particularly relates to the technical field of gate scheduling control systems. Trend results are generated by differentially determining the signs of the inflow and reservoir water level, consistency checking is performed in combination with the discharge variation direction and gate opening instruction to form an effective instruction sequence; the residual space amount of the downstream sensitive area is calculated, and the channel impact coefficient is generated in combination with the discharge impact amount and channel conditions; on this basis, the over-limit channel flow is reduced and distributed to the normal channel to form a rechecked sharing result. The application can realize trend dynamic judgment and instruction direction matching, guarantee discharge adjustment and hydrological condition consistency, and through the closed logic of reduction and distribution, the multi-channel flow sharing structure is optimized, the gate adjustment sequence logic is set according to the gate operation principle of the power station design, automatic matching of the discharge and gate adjustment is realized, and the situation of lower gate operation order is prevented.

The invention discloses an intelligent water conservancy multi-modal perception and decision optimization system, and relates to the technical field of urban water network security, and the system comprises a multi-modal perception and fusion module which is used for generating a comprehensive perception data flow; the intelligent diagnosis and early warning module is used for carrying out abnormal feature extraction and event positioning on the comprehensive perception data flow and generating a preliminary diagnosis result; carrying out risk research and judgment to obtain an early warning risk result; the physical constraint risk deduction module is used for deducing by utilizing the physical constraint solving model to generate a risk evolution field; the multi-objective cooperative control module is used for constructing a multi-objective optimization function, reinforcing a learning framework by utilizing a meta-strategy gradient, and generating a cooperative scheduling strategy; the digital twinning and strategy rehearsal module is used for constructing a water network twinning body; and performing verification and screening by using a bidirectional state synchronization mechanism, and outputting an optimal decision set. According to the invention, the core problems of difficult positioning of pipe network aging, low multi-source monitoring precision, rainfall flood regulation lag and the like in urban water network management can be solved.

The invention discloses a rainfall flood regulation and storage efficiency evaluation method and a related device, and relates to the technical field of data analysis, and the method comprises the steps: calculating the rainfall depth based on the rainfall scene parameters of a target region; determining a first maximum water storage depth of a blue space in the target area, and calculating a first net water storage volume of the blue space based on the first maximum water storage depth and the rainfall depth; determining a second maximum water storage depth of a green space in the target area based on a runoff curve method so as to analyze a second net water storage volume of the green space; determining the runoff volume of the impervious surface in the target area, and calculating a rainfall flood regulation and storage efficiency index based on the runoff volume, the first purified water storage volume and the second purified water storage volume; and comparing the rainfall flood regulation and storage efficiency index with a preset threshold value, and determining classification information of the rainfall flood regulation and storage efficiency based on a comparison result. According to the method, the calculation cost of a complex hydrological model and excessive simplification of an empirical parameter method are avoided, and efficient and accurate urban rainfall flood regulation and storage efficiency evaluation and classification are realized.

The invention relates to the technical field of flood regulation, and discloses an underground space flood regulation and storage structure which comprises a bottom plate, side walls, retaining walls and partition walls, the side walls are sequentially connected end to end and fixedly connected with the bottom plate to form a basement, the retaining walls are sequentially connected end to end and fixedly connected with the bottom plate, and a fertilizer groove is defined by the side walls and the bottom plate. A plurality of partition walls are arranged in the fertilizer tank and divide the fertilizer tank into a primary sedimentation flood storage bin, a secondary sedimentation flood storage bin and a filtering flood storage bin, a water inlet pipe communicated with a municipal sand well is arranged on a retaining wall of the primary sedimentation flood storage bin, a flap valve is arranged in the water inlet pipe, and a fine grid is arranged between the primary sedimentation flood storage bin and the secondary sedimentation flood storage bin. And an activated carbon filtering block is arranged between the secondary sedimentation flood storage bin and the filtering flood storage bin. Compared with the prior art, the foundation pit fat groove cavity around the basement is permanently reserved as the distributed flood storage bins, the water storage space can be flexibly allocated by means of the multiple flood storage bins under the extreme waterlogging working condition, the municipal drainage pressure is relieved, and the flood control toughness is enhanced.

The present application relates to the technical field of flood control optimal scheduling, in particular to a reservoir group flood control optimal scheduling method and system based on quadratic programming, the method comprising the following steps: according to the water conservancy facilities and hydrological elements in the basin, the system sorts out the spatial distribution of key nodes and their hydraulic connection, constructs a flood control scheduling topological network, and obtains a reservoir group flood control optimal scheduling topological graph; a reservoir group flood control optimal scheduling quadratic programming model is established according to the reservoir group flood control optimal scheduling topological graph; based on the MINOS library of GAMS, the least gradient method and quasi-Newton method are used to optimize and solve the reservoir group flood control optimal scheduling quadratic programming model. The present application couples the propagation of flood between reservoir groups in the mathematical equation set, avoids complex simulation sequential coding, is easy to model, has good universality, and the model is easy to seek an optimal solution, can balance the reasonable scheduling of the flood control capacity, peak shaving effect and reservoir storage capacity of the reservoir, and improve the accuracy and efficiency of flood regulation.

The application discloses a kind of river and lake regulation system flood evolution intelligent prediction method based on dynamic storage and discharge relationship, comprising: constructing the space-time dynamic correlation graph structure reflecting the hydraulic connection of basin, mapping multiple-source hydrological data to generate the model input set of unified space-time scale;Establish an aggregated reservoir parameterization structure model, including the dynamic water level-storage relationship driven by inflow variation characteristics, and the composite water level-flow relationship integrating the time lag effect and backwater jacking feedback;Construct flood regulation equation set, according to the real-time time lag state in the composite relationship, switch between different algorithm channels to solve the equation set using adaptive solving mechanism;Use real-time observation data to correct model state and perform rolling prediction.The application effectively solves the problems of difficult to describe the dynamic characteristics of storage and discharge relationship in complex river and lake system, unstable solution of non-same phase evolution process and difficult to determine high-dimensional parameters, and improves the continuity and physical consistency of flood prediction.

The application discloses a rain flood regulation and storage efficiency evaluation method and related device, and relates to the technical field of data analysis, the method comprises the following steps: calculating rainfall depth based on rainfall scenario parameters of a target area; determining the first maximum water storage depth of blue space in the target area, calculating the first net water storage volume of the blue space based on the first maximum water storage depth and the rainfall depth; determining the second maximum water storage depth of green space in the target area based on the runoff curve method to analyze the second net water storage volume of the green space; determining the runoff volume of the impervious surface in the target area, calculating the rain flood regulation and storage efficiency index based on the runoff volume, the first net water storage volume and the second net water storage volume; comparing the rain flood regulation and storage efficiency index with a preset threshold, and determining the classification information of the rain flood regulation and storage efficiency based on the comparison result. The application avoids the calculation cost of a complex hydrological model and the excessive simplification of an empirical parameter method, and realizes efficient and accurate evaluation and classification of the urban rain flood regulation and storage efficiency.

The application discloses a gate scheduling optimization method considering reservoir flood discharge process homogenization, and comprises the following steps: reservoir gate group object-oriented modeling; specific gate object instantiation; gate group combination use rule modeling; reservoir flood control scheduling rule modeling and flood regulation calculation; gate group opening degree combination initial result set calculation; and gate group opening degree combination result set optimization adjustment. The application improves the accuracy of the reservoir flood control scheduling calculation process, makes the gate scheduling calculation closer to the actual situation, and realizes the intellectualization, practicality and convenience of the flood control decision.

The invention discloses a method for quantitatively evaluating the influence of the pattern change of a watershed ecosystem on a wading function. The method comprises the following steps: constructing an SWAT model; performing watershed discretization and HRU (hydrological response unit) division, parameter setting and model operation, and calibrating and verifying the model; replacing ecological system types of forests, grassland and wetlands in the land utilization data with bare lands, and operating the watershed hydrological model again; carrying out watershed hydrological process simulation under different land utilization scenes to obtain corresponding rainfall, evapotranspiration, runoff depth, water yield and river runoff; the basin water source conservation amount is calculated; the water yield is obtained; a standardized runoff index is calculated through the runoff volume of the river channel, and flood / drought occurrence months are counted. The method provided by the invention can quantitatively evaluate the influence of the pattern change of the main natural ecosystem on the watershed water source conservation effect, the water production effect, the flood regulation and storage and the drought relief effect, and provides theoretical support for scientific management, protection and recovery measures of the watershed ecosystem.

The invention relates to the technical field of reservoir dispatching, and provides a quick algorithm for dynamic reservoir capacity of a variable backwater area of a river-type reservoir, comprising the following steps: acquiring basic parameters of the river-type reservoir; the initial water level, the end water level, the initial storage flow and the end storage flow in the flood regulation process are obtained; based on the starting water level and the ending water level, static reservoir capacity changes are calculated according to the basic features of the river; determining a starting natural water level and an ending natural water level from the dam site natural water level and flow relation curve based on the starting reservoir flow and the ending reservoir flow; calculating an initial water return length and an end water return length based on the initial water level, the end water level, the initial natural water level, the end natural water level and the river channel gradient; and based on the initial water return length, the ending water return length, the initial storage flow, the ending storage flow, the initial water level and the ending water level, calculating dynamic storage capacity change by using a parabolic water return curve equation, and calculating the ratio of the dynamic storage capacity change to static storage capacity change.

The application discloses an integrated simulation method for flood evolution, characterized in that the method comprises the following steps: sketching the plane profile of ground objects in a research area, identifying and classifying the ground objects; performing fine modeling of the ground objects in the research area; performing time-space numerical discretization of two-dimensional control equations describing water flow movement on a calculation grid, and constructing a two-dimensional water dynamic solver; establishing a ground object calculation module of a river channel and towns along the river channel / retaining and detention flood storage areas, and a connection calculation module; establishing a time-space connectivity control module of the river channel and the towns along the river channel / retaining and detention flood storage areas, and performing simulation of flood evolution and regulation of the river channel and the towns along the river channel / retaining and detention flood storage areas at a time step; saving the results of a water flow plane physical field, a cross-section water level and a flow process calculated by a flood pre-forecast cooperative work system in a hard disk, and performing flood regulation analysis and evaluation. The application has the advantages of good stability, high reliability, high calculation efficiency and strong universality.

The application relates to the field of environmental protection and water resource recycling, and discloses an intelligent regulation and storage revetment, which comprises a regulation and storage pool, a water inlet, a first water pump, a second water pump, a water level sensor and a water pump controller arranged in the revetment. A partition plate with a height lower than that of the regulation and storage pool is arranged in the regulation and storage pool, and the partition plate divides the regulation and storage pool into a first chamber and a second chamber which are isolated at the lower part and connected at the upper part. The water inlet guides water into the first chamber. The inlet of the first water pump is in the first chamber, and the outlet is connected with a sewage pipe network; the inlet of the second water pump is in the second chamber, and the outlet is arranged towards a river channel. The water pump controller is configured to: when detecting that the water level of the first chamber exceeds a first water level threshold, starting the first water pump to discharge the water in the first chamber towards the sewage pipe network; and when detecting that the water level of the second chamber exceeds a second water level threshold, starting the second water pump. The application effectively realizes the functions of non-point source pollution interception, reduction of the load of the sewage pipe network and rainwater and flood regulation and storage.

The application provides a hydraulic structure structure of flood discharge, discharge and diversion, comprising a vertical shaft type spillway tunnel, a diversion tunnel communicated with the vertical shaft type spillway tunnel is arranged on one side of the vertical shaft type spillway tunnel, a water retreating tunnel connected with the vertical shaft section and the stilling basin section in the vertical shaft type spillway tunnel respectively is arranged in the vertical shaft type spillway tunnel, the tunnel body part of the diversion tunnel comprises a connecting section intersected with the water retreating tunnel, so that the diversion tunnel can share the water retreating tunnel tunnel section intersected through the connecting section with the vertical shaft type spillway tunnel; a water discharge pipe is arranged at the bottom of the water retreating tunnel, so that the water discharge pipe and the vertical shaft type spillway tunnel are arranged in a compact mode. The vertical shaft type spillway tunnel, the water discharge pipe and the diversion tunnel are combined, the tunnel body part of the diversion tunnel is combined with the water retreating tunnel of the vertical shaft type spillway tunnel, so that the construction period diversion requirement is met, and the reservoir emptying and flood regulation requirement in the operation period is met.

The underwater dredging robot comprises a vehicle seat and a negative pressure adsorption hopper, sliding arms are slidably connected to the upper portions of the two sides of the vehicle seat, rotating arms are rotatably connected to the interiors of the front sides of the sliding arms, and a first rotating shaft and a second rotating shaft are rotatably connected to the interiors of the other ends of the rotating arms correspondingly; the lower part of the first rotating shaft penetrates through the outer side of the rotating arm and is sleeved with a lifting cylinder, the lower part of the lifting cylinder is fixedly connected with a rotating disc, the lower part of the rotating disc is fixedly connected with a plurality of groups of brushes, and the upper part of the second rotating shaft penetrates through the rotating arm and is fixedly connected with a rake-shaped hook claw; the outer side of the first rotating shaft and the outer side of the second rotating shaft are fixedly connected with turning gears which are meshed with each other, so that the industrial problems that traditional dredging equipment is easy to wind and block and needs to be frequently shut down for cleaning are fundamentally solved, and the continuity and the working efficiency of dredging operation are greatly improved; and the method is completely adapted to the emergency dredging working condition of the riverway with high impurity content after the flood.

The application discloses a multi-dimensional quantification method for flood non-uniform evolution law, comprising the following steps: constructing a physically constrained regular path through a multi-channel Bayesian grey weight and a water balance penalty to physically align the measured and natural flood processes; constructing a local deformation tensor field along the trajectory distribution in the reconstructed high-dimensional phase space; decoupling the mixed regulation and storage effect into a stretching tensor component representing the peak clipping effect and a rotating tensor component representing the mispeak effect by using polar decomposition technology to generate a decoupling index set; obtaining a water engineering state vector, constructing a dynamic causal diagram containing a physically constrained regularization term, and quantifying the path-level contribution of the water engineering regulation path to the non-uniform evolution. Through tensor decoupling and physically constrained causal learning, the application realizes accurate extraction and physical attribution of the non-uniform full attribute characteristics of flood, and improves the scientificity of flood regulation and control decision.

The invention relates to the field of environmental protection and water resource recycling, and discloses an intelligent regulation and storage revetment which comprises a regulation and storage pond, a water inlet, a first water pump, a second water pump, a water level sensor and a water pump controller which are arranged in the revetment. A partition plate lower than the storage pond is arranged in the storage pond and divides the storage pond into a first cavity and a second cavity, the lower portions of the first cavity and the second cavity are separated, and the upper portions of the first cavity and the second cavity are communicated. The water inlet directs water into the first chamber. An inlet of the first water pump is arranged in the first cavity and an outlet is connected with a sewage pipe network; an inlet of the second water pump is arranged in the second chamber; the water pump controller is configured to start the first water pump to discharge water in the first chamber to the sewage pipe network when detecting that the water level of the first chamber exceeds a first water level threshold value; and when detecting that the water level of the second chamber exceeds a second water level threshold value, starting the second water pump. The functions of non-point source pollution interception, sewage pipe network load reduction and rainfall flood regulation and storage are effectively achieved.

The utility model relates to the technical field of sponge city pavements, and discloses a double-layer water-filtering permeable pavement structure suitable for sponge city construction, which consists of a functional surface layer, a leveling layer, an isolating layer, a double-filtering layer assembly, a structural plate, a reinforced concrete layer and a base layer. The functional surface layer integrates anti-skid textures and a hydrophobic coating, so that the safety performance is improved; rainwater gradient purification is achieved through the double-filtering-layer design, and the interlayer connection stability is strengthened by combining the inserting connection structure of the side connecting blocks and the side inserting rods and the supporting side rods. A flow guide plate, a liquid guide hole and a drainage concealed pipe are embedded in the reinforced concrete layer, an efficient guide and drainage system is constructed, and rapid infiltration and directional drainage of rainwater are achieved in cooperation with the drainage hole. According to the scheme, the technical problems that a traditional permeable pavement is poor in skid resistance, a filtering layer is prone to being blocked, the structure is prone to cracking, drainage lags and the like are solved, the pavement bearing capacity, the purification efficiency and the rainfall flood regulation and control capacity are remarkably improved, the comprehensive requirements of sponge cities are met, and remarkable ecological and engineering application value is achieved.

The invention relates to an early warning and evaluation method for a flood scheduling scheme, and relates to the field of water conservancy project management and reservoir scheduling. The scheme process of the plan scheme and the key node event library are imported into an early warning model in advance, and events meeting the triggering requirements in the process are reminded or warned; obtaining an optimization plan scheme according to the alarm event content and the output flow and output of the reservoir in the constraint adjustment plan scheme; in the process, the index quantity of reservoir entering flood is calculated according to the process of optimizing the plan scheme, actual incoming water and current reservoir operation data, and damaged events and constraints are reminded in real time; afterwards, the actual process simulation scheme and the redisk scheme are compared, weight distribution is carried out on the indexes to obtain scheme scores, and finally scheme recommendation is carried out according to the scores. According to the method, an early warning and recovery route from plan scheme dynamic optimization and real-time risk early warning to post-event quantitative evaluation is constructed, and scientific support is provided for drainage basin flood dispatching.

The invention provides a drainage pipe network pre-emptying waterlogging prevention system based on rainstorm early warning and water level linkage, and belongs to the technical field of urban waterlogging prevention, the drainage pipe network pre-emptying waterlogging prevention system based on rainstorm early warning and water level linkage comprises a weather early warning unit, a pipeline liquid level monitoring unit, a reservoir water level monitoring unit, a drainage device and a controller. The weather early warning unit is used for receiving weather information; the pipeline liquid level monitoring unit is used for monitoring the water level in the rainwater pipe; the reservoir water level monitoring unit is used for monitoring the water level of a pump station reservoir; the drainage device is used for draining water in the reservoir; the controller is configured to start the drainage device in advance when the weather early warning unit responds to heavy rain or rainstorm in the future, and accumulated water in the water storage pool and the rainwater pipeline is gradually drained or lowered to the low position. The internal space of the rainwater pipeline and the reservoir is used as a pre-flood regulation and storage space, and the pipe network is emptied in advance, so that the resistance of rainwater entering the pipeline during rainfall is small, the flood drainage efficiency is greatly improved, and urban waterlogging is radically relieved.

The invention relates to the technical field of hydrology and water resource prediction, in particular to a cross-border river short and medium hydrology meteorological numerical forecasting method and system based on an ensemble forecasting system and multi-model collaboration and a medium. Multi-mode weighted fusion is realized by adopting probability matching correction and combining with improved geometric averaging, and regression-based threshold probability quantitative rainfall forecast is constructed; making a set average and set probability product according to the basin boundary, performing precision verification and subjective correction on the result, and generating a basin precipitation distribution diagram; the corrected rainfall is input into a subarea hydrological model, a three-water-source Xinanjiang model is used for calculating runoff and confluence, a Muskinggen method is adopted for river channel confluence, reservoir flood regulation is completed in combination with static reservoir capacity flood regulation calculation, and the runoff process, the flood peak and the occurrence time are obtained; and selecting a typical flood process to carry out inspection.

The invention provides a method for determining the critical overtopping flood scale of a reservoir dam, and belongs to the technical field of water conservancy project evaluation, and the method comprises the steps: S1, obtaining key basic data of a reservoir; s2, fitting the flood peak flow data and the flood process detailed data of the flood in different recurrence periods to obtain a corresponding flood flow hydrograph Q in (t); s3, a certain flood flow hydrograph Q < in > (t) is combined with the water level-reservoir capacity-floodway discharge capacity curve to obtain a corresponding flood regulation discharge flow hydrograph Q < out > (t); s4, judging whether the flood process is critical overtopping flood or not by utilizing the flood flow hydrograph Q in (t) and the flood regulation discharge flow hydrograph Qout (t); and S5, outputting the flood parameters of the critical overtopping flood. According to the method, the reservoir inventory and the critical overtopping flood scale are combined, and the flood parameters can be accurately determined.

An urban rainfall flood regulation and storage space identification and screening method based on multi-target quantitative comparison and selection comprises the steps of data construction and preprocessing, quantitative evaluation and assignment and high-potential region screening, specifically, firstly, multi-dimensional data are obtained, the data format is unified through rasterization and normalization processing, then the weight of each index is objectively calculated through an entropy weight method, and the weight of each index is calculated through combination of a TOPSIS method. A region comprehensive evaluation score is obtained through weighted standardization, ideal solution calculation, Euclidean distance measurement and calculation and relative close degree analysis, finally, a screening threshold value is set to preliminarily screen a high-potential region, fragmented land parcels are removed through spatial continuity analysis, a position is calibrated and verified through a GIS platform, a multi-target optimization model is solved in combination with an NSGA-II algorithm, and a high-potential region is obtained. A Pareto optimal solution set is obtained; according to the method, overall balance of social benefits and water conservancy requirements is achieved, scientificity, objectivity and accuracy of site selection are improved, and the method is suitable for urban new district planning and built-up district updating and transformation and wide in application prospect.