25 results about "Catchment area" patented technology

This invention relates to the fields of reservoir scheduling, flood control and disaster reduction, and hydrological forecasting, and particularly to a method for calculating reservoir rainfall carrying capacity based on a dynamic runoff coefficient. The method includes the following steps: collecting data including the target reservoir's catchment area, characteristic water level, and water level-capacity relationship curves; establishing a dynamic equation for rainfall-runoff coefficient based on reservoir storage using the initial water level, characteristic water level, and storage capacity relationship curves; collecting and analyzing historical flood data for the target reservoir to generate parameter statistics tables for each flood event; establishing a dynamic equation for rainfall-runoff coefficient based on underlying surface conditions based on the parameter statistics tables for each flood event; and solving the dynamic equations based on reservoir storage and underlying surface conditions simultaneously. This invention relies on real-time water level and real-time rainfall to dynamically calculate reservoir rainfall carrying capacity, thus improving the accuracy of reservoir rainfall carrying capacity calculation.

This invention relates to the field of environmental anomaly early warning technology, and discloses an automatic early warning system for environmental anomalies in urban ecologically sensitive areas based on spatiotemporal data mining. The system includes: extracting intermediate center scalars; calculating rainfall concentration coefficients; generating bottleneck boundary retention and collapse coefficients; generating a dynamic adjacency matrix; outputting predicted future anomaly intensity values; generating cumulative anomaly energy; and outputting automatic early warning values ​​for the entire area. This invention constructs structural segments by spatially overlapping the catchment area of ​​the total urban ecologically sensitive area with riverside or boundary strip areas. It uses intermediate center scalars to identify topological bottleneck segments, employs a dynamic adjacency matrix to allow the propagation weights between structural segments to change in real time with the boundary hydraulic conditions, and integrates the bottleneck boundary retention and collapse coefficients into the gating mechanism of the spatiotemporal graph convolutional network to achieve adaptive adjustment of the model's time memory. It outputs standardized early warning values ​​for the entire area, adapting to practical application scenarios for environmental management in urban ecologically sensitive areas.

The application provides a slope unit division and landslide susceptibility evaluation method, and belongs to the technical field of data processing, and specifically comprises the following steps: generating basic data required for slope unit division and susceptibility evaluation; identifying and skeletonizing the terrain boundary information of a study area based on the basic data; establishing a spatial connection relationship based on the terrain skeleton to form a closed initial catchment area; optimizing and integrating the initial catchment area in combination with terrain and hydrological constraints to obtain a final slope unit division result; extracting various evaluation factors required for landslide susceptibility evaluation based on the final slope unit, and constructing evaluation sample data; establishing a susceptibility evaluation model by using the evaluation sample, and training and optimizing the model parameters; and using the optimized susceptibility evaluation model to carry out prediction analysis on the slope units in the study area, and outputting the landslide susceptibility evaluation result. Through the scheme of the application, the evaluation efficiency, accuracy and adaptability are improved.

This invention discloses a method and system for simulating stormwater runoff infiltration and storage in rain gardens for sponge cities. First, using a centimeter-resolution three-dimensional topographic model of the target catchment area, the layered structure and geotechnical parameters of LID (Light Infiltration Device) facilities, and minute-by-minute rainfall intensity-duration curves of the design storm as input, an improved Green-Ampt infiltration model considering the layered media and surface water storage driving effects is constructed. This model is integrated with a two-dimensional shallow water equation surface runoff model driven by centimeter-resolution micro-topography through a two-way temporal coupling mechanism, achieving minute-by-minute dynamic simulation of the entire design storm process. This fully reproduces the entire hydrological process of surface runoff collection, LID facility infiltration and storage, and overflow. This invention significantly improves the accuracy and reliability of stormwater process simulation, and can simultaneously output spatiotemporal dynamic visualization results of runoff, quantitative hydrological indicators, and compliance assessment results of sponge city design specifications, providing reliable technical support for the refined design and effect verification of LID facilities.

This invention belongs to the field of water pollution source tracing technology, and specifically relates to a source tracing method for water pollution at monitoring sections in river basins. The method includes collecting seven types of basic data, such as industrial and agricultural sources; screening out exceeding pollution standards and corresponding catchment area pollution sources through standardized preprocessing; constructing standardized topological relationships between four types of pollution sources, discharge channels, and exceeding pollution standards, and marking pollution sources without topological relationships; calculating the correlation between nodes based on topological type differences, and calculating spatial correlation for nodes without topological relationships; designing differentiated methods to calculate relative emissions for industrial, agricultural, and domestic sources; combining correlation and relative emissions to calculate a comprehensive correlation, and outputting the source tracing results after sorting. This invention solves the problems of existing water pollution source tracing technologies, such as the lack of systematic topological relationships, biased calculation dimensions, and inaccurate results.

A method for calculating the water catchment of transmission towers considering the influence of multiple factors includes the following steps: calculating the component shape coefficient; calculating the tower frame filling coefficient; calculating the projected area of ​​rainfall blocked by the tower; calculating the rainfall intensity P at the tower location; determining the rainfall angle α; determining the environmental calibration factor λ; calculating the water catchment of the transmission tower; and verifying the calculation through on-site monitoring. This invention provides a method for calculating the water catchment of transmission towers considering the influence of multiple factors, enabling accurate quantification of the water catchment of transmission towers during rainfall.

This invention relates to the field of water treatment control technology, and provides an adaptive control method for bio-wax water purification based on runoff load prediction. The method includes: acquiring a geographic information system (GIS) layer of the drainage network in the catchment area; dividing the catchment area into multiple sub-catchment units and calculating the hydraulic transmission time of each sub-catchment unit; calculating the pollution accumulation density score and corresponding contribution weight of each sub-catchment unit by combining the number of drought days in the previous period, the impermeable area ratio, the area of ​​the sub-unit, and the pollution intensity coefficient; calculating the local concentration time series using an exponential decay model, and superimposing the local concentration time series of the sub-catchment units that have reached the inlet according to their contribution weights to obtain a superimposed predicted concentration time series; calculating the target influent flow velocity based on the superimposed predicted concentration time series, and generating a feedforward command sequence. This invention accurately reconstructs the initial flushing concentration time series, effectively avoiding the problem of insufficient early shock treatment capacity.

The invention discloses a hydrological data analysis and forecasting method based on machine learning, which comprises the following steps: acquiring a digital elevation model of a target area, and determining an earth surface confluence direction based on the digital elevation model; obtaining shrinkage crack trend information of the target area and determining a crack diversion direction; acquiring a rainfall time sequence and river channel monitoring time sequences of the first river channel and the second river channel; inputting the rainfall time sequence, the riverway monitoring time sequence of the first riverway, the riverway monitoring time sequence of the second riverway, the earth surface confluence direction and the crack diversion direction into a cross-catchment area water delivery judgment model, and outputting a cross-basin water delivery judgment result; and when the inter-basin water delivery judgment result represents that inter-basin water delivery exists, the effective rainfall of the rainfall event is redistributed from the basin corresponding to the first river channel to the basin corresponding to the second river channel, and a forecast water level or forecast flow is generated respectively. According to the method, the problems of false report and missing report caused by cross-basin hidden water delivery under the shrinkage crack condition are solved.

This utility model discloses an energy storage device for the utilization of rainwater resources in an open-pit mine catchment area, relating to the field of water resource management and utilization technology. The utility model includes a purification tank, with a transmission pipe fixedly connected to the inner wall of the bottom of the purification tank. A clear water tank is fixedly connected to the outer wall of the end of the transmission pipe furthest from the purification tank. Through a squeezing block, the limiting shaft squeezed by the squeezing block is released, and similarly, the spring that was originally squeezed is also released. The spring then rebounds, and the force of the spring rebound drives the limiting shaft to quickly reset. At this point, the end of the limiting shaft that was originally outside the mounting box retracts into the mounting box, and the limiting shaft no longer restricts the filter plate. The filter plate can then be replaced, achieving the effect of quick installation and removal of the filter plate. This minimizes equipment downtime, improves the overall operating efficiency of the system, and avoids resource waste or decreased efficiency caused by prolonged downtime.

The present application belongs to the technical field of basin hydrology monitoring, and particularly relates to a method for measuring winter runoff of a small basin in a cold region. A flow measuring weir is arranged at a water outlet of a catchment area of a small basin in a cold region, a flow guide pipe is arranged at the bottom of the flow measuring weir, and a low-temperature radar flowmeter is arranged at the top center position inside the flow guide pipe to measure the runoff. The present application provides a method for measuring winter runoff of a small basin in a cold region. The method constructs a flow measuring weir, sets a flow guide pipe to guide the flow, introduces the runoff of the small basin from the ground surface to the underground, ensures the normal flow of the runoff water during the ice formation period in winter, thereby avoiding the adverse effects of water freezing on the measurement of the runoff, and accurately measures the flow rate and flow of the winter runoff by using the low-temperature flowmeter.

The utility model discloses a kind of water-accumulation-free flowerpot trays, belong to flowerpot tray technical field, it includes disc body, the upper surface of the disc body is provided with recess, the inside of the recess is provided with catchment area, the catchment area is connected with water guide groove, the sidewall of disc body is provided with the butt joint pipe head being connected with the water guide groove, the butt joint pipe head is detachably connected with water guide pipe, the inside of the recess is provided with support protrusion, the space between flowerpot and tray is increased by the arrangement of support protrusion, increase breathability.When using, flowerpot is placed above support protrusion, when watering, water leaked from flowerpot can be stored in catchment area, the water liquid of catchment area flows into water guide pipe through butt joint pipe head via water guide groove, water liquid in tray can be promptly discharged, avoid tray water-accumulation or overflow, save manual force, avoid pollution environment, maintain hygiene.

The present application relates to the technical field of data processing, in particular to a kind of urban waterlogging water evolution monitoring and early warning method based on multi-source data.The method generates the rainfall intensity and water depth of each cycle end of each catchment unit pre-divided;According to its catchment area, rainfall intensity and water depth at the end of the current cycle and water depth at the end of the last cycle, the actual inflow is determined by inversion;And identify whether to generate reverse flow identifier for catchment unit;If the current rainfall intensity and water depth meet the preset condition, compare the theoretical drainage capacity value determined based on the current water depth with the actual inflow, determine the drainage resistance index;From the catchment unit that meets the preset condition, the to-be-monitored unit is obtained by screening;According to the drainage resistance index difference of each to-be-monitored unit and its neighbor catchment unit, generate drainage anomaly label, label is used to indicate that there is local physical blockage or hydraulic jacking in the corresponding unit, thereby improving the accuracy and efficiency of emergency response.

This invention discloses a drainage system and construction method for basements, belonging to the field of building engineering technology. It includes a three-dimensional drainage structure subsystem, an integrated drainage power subsystem, and an intelligent monitoring and maintenance subsystem. The three-dimensional drainage structure subsystem includes an active drainage module for post-cast strips, a multi-stage water interception module for vehicle ramps, and a drainage and guidance module for the basement slab. The integrated drainage power subsystem includes at least two sump pits arranged according to the basement's catchment area. The intelligent monitoring and maintenance subsystem enables distributed monitoring, centralized control, and remote operation and maintenance, including a field perception layer, a field control layer, and a platform application layer. This system improves drainage efficiency and reliability, enabling unattended and efficient operation of drainage facilities and ensuring the dryness of underground spaces. Simultaneously, the drainage structure is constructed concurrently with the main structure, without occupying additional construction time, and protects structural integrity; it also helps reduce the building's life-cycle cost, making it economical and environmentally friendly.

This invention discloses a distributed atomized rainfall measurement system and method for high dam flood discharge. The method includes: deploying a measurement matrix within a predetermined measurement space, consisting of multiple vector open-faced rain measuring devices with dynamically adjustable opening angles and water-facing attitudes, and acquiring their raw measurement data; identifying and separating effective measurement data corresponding to atomized raindrops based on the spatiotemporal characteristics of the raw measurement data; calculating the atomized rainfall intensity at the location of each rain measuring device by normalizing the effective catchment area corresponding to the real-time opening angle of each rain measuring device at the measurement time, based on the effective measurement data; and generating a three-dimensional atomized rainfall intensity distribution based on the atomized rainfall intensity and spatial location of multiple rain measuring devices. This invention solves the problem of atomized rainfall intensity measurement under extreme hydraulic environments by adaptively controlling the device attitude and opening angle, identifying the signal source, and dynamically normalizing the rainfall intensity calculation.

The application provides a kind of city waterlogging depth real-time prediction method based on artificial intelligence.The method is applied to the technical field of smart city, which comprises obtaining real-time meteorological data, pipe network liquid level and terrain elevation data of each catchment area of the target city; based on the meteorological and elevation data, surface runoff and rainwater aggregation characteristics are extracted, the initial waterlogging risk representation value is determined, the waterlogging potential category is divided, and it is determined whether to be included in the key monitoring queue; if yes, the drainage saturation is determined based on the pipe network liquid level fluctuation frequency; based on the drainage saturation and the runoff characteristics, a spatial topology graph is constructed, the adjacent area water flow spreading tightness is calculated, the AI model feature aggregation weight is adjusted, the real-time waterlogging depth is input into the model for prediction, and the waterlogging prediction accuracy and timeliness are improved. The accuracy of city waterlogging depth prediction is improved.

A neural network-based method for refined water level monitoring in reservoirs first divides the reservoir catchment area into different regions. Then, historical data for each catchment area is collected. Next, neural network models are constructed for each type of outflow in each region and trained. Following this, a mathematical model for water level is built based on the catchment areas. Real-time data is then used to predict water levels, and the predicted data is input into the mathematical model to solve for the water surface changes and water level heights in each region at each finely granular time point. An alarm is triggered when the water level exceeds a set threshold. This method can more accurately depict water surface changes and water level heights, capturing water level differences within minute time intervals, thus achieving refined monitoring and alarm functions.

The application discloses a multi-source data fusion drainage partition intelligent planning calculation method and system, relates to the technical field of urban drainage engineering, and comprises the following steps: acquiring geographic information data, drainage pipeline data and remote sensing image data of a target region; performing identification processing on the remote sensing image to extract building features; spatially registering the feature identification result and the geographic information data; calculating the roof inclination degree of the building to determine a catchment area; constructing a pipe network topology relationship to calculate catchwater capacity; generating a drainage path map based on an elevation difference and the topology relationship; and calculating the flow coupling degree between regions to divide independent catchment partitions. The application realizes building three-dimensional feature extraction and accurate runoff feature calculation through multi-source data fusion, and improves the accuracy and rationality of drainage partition planning.

The present application is applicable to the technical field of pollution control, and provides a catchment-based stormwater runoff non-point source pollutant load forecasting method and apparatus. The method comprises: acquiring satellite remote sensing image data of each sub‑catchment area of a target catchment cross section, and rainfall forecast information of each sub‑catchment area in a future rainfall period; dividing each sub‑catchment area into a plurality of functional areas; determining underlying surface distribution information of each functional area on the basis of the satellite remote sensing image data; forecasting a stormwater runoff non-point source pollutant load curve of each functional area in the future rainfall period on the basis of the functional type, the rainfall forecast information, and the underlying surface distribution information of each functional area; and finally determining a stormwater runoff non-point source pollutant load forecasting result for the target catchment cross section in the future rainfall period. The present application can achieve accurate stormwater runoff non-point source pollutant load forecasting.

The application discloses a method and system for identifying flat terrain in a no-man's land for machine vision, and relates to the technical field of terrain identification.The method comprises the following steps: obtaining digital elevation model data, ground optical images, multispectral remote sensing images, SAR images and near-real-time meteorological data of a window period of a target area; performing feature recognition and extraction to obtain visual recognition features; performing fusion processing to determine a static flat passable area; predicting potential catchment areas and soil moisture changes to generate a dynamic safety area; and performing spatial overlap alignment between the dynamic safety area and the static flat passable area to determine a passable flat area.The method solves the technical problem that the prior art cannot effectively respond to dynamic changes in the environment of a no-man's land, resulting in insufficient accuracy, comprehensiveness and safety of flat area identification.The method achieves the technical effect of improving the accuracy, comprehensiveness and safety of terrain identification in a no-man's land by combining multi-source data fusion and dynamic and static analysis.

The application provides a method for constructing a sub-catchment area of a SWMM model of a city drainage system, and relates to the technical field of city flood simulation and geographic information data analysis. Basic geographic information data of a modeling area is read and preprocessed; the sub-catchment area is automatically divided based on the inspection well node, and a unique drainage outlet is bound for each sub-catchment area; a plurality of characteristic width calculation schemes suitable for different scenes are preset, and can be selected according to requirements, and unit conversion is automatically completed after calculation. A slope grid is automatically generated based on DEM data, the average slope of each sub-catchment area is counted, and the result is corrected. Based on land use grid data, a group of preset hydrological parameter values is given to each sub-catchment area to form a complete parameter set for direct use of the model. The application overcomes the problems of traditional manual operation being complicated and inefficient, realizes rapid construction of a whole process from basic data to input of the sub-catchment area of the SWMM model, and improves the efficiency and consistency of city flood simulation modeling.

This information processing device comprises: an acquiring unit that acquires the catchment area and slope for each of a plurality of divided regions included in a prescribed area, and acquires the population density or distance from an urban area; a calculating unit that calculates a topographic wetness index on the basis of the catchment area and the slope for each of the plurality of divided regions; and an extracting unit that extracts a candidate site for a water source from among a plurality of target regions included in the area on the basis of the topographic wetness index and the population density or the distance from an urban area.

The application provides a calculation method for a short-duration heavy rainfall urban inundation area, and belongs to the technical field of urban waterlogging inundation calculation.The application simplifies a city ground water convergence process, divides a complex flow field into a plurality of unit sub-catchment areas, calculates the ground water amount in a unit, sequentially calculates the ground water amount in each catchment area, and further obtains the ground water amount of the whole flow field.The application converts the ground water amount into a ground surface inundation range according to the water level-topography and other surface features of the flow field, has few model parameters, a fast calculation process and strong principle universality, and can be comprehensively promoted.