765 results about "Flood prevention" patented technology

The invention relates to a modeling method of an on-line hydraulic model of a municipal drainage pipe network, belonging to the technical field of municipal engineering information; the modeling method can construct a municipal drainage pipe network on-line model and realize to input real-time rainfall data to the on-line model continuously when flood situation is forecasted, and analog computation is carried out to the model; furthermore, the model provides analog computation data of whole future water recession process for a drainage pipe network system continuously, so as to achieve real-time forecasting water regimen and timely warning functions. The method overcomes the disadvantages that the conventional drainage pipe network event model only can simulate the complete rainfall events in the city flood simulation and can not simulate real-time rainfall events, can effectively forecast the generating and changing process of the city flood in a real-time and on-line way, ensure long-term and stable operation of the on-line model system and provide technical support for city flood-prevention strategic decision.

The washing machine flood prevention system provides an interruptible power supply to a washing machine. In the event of potential flooding by the washing machine, power to the washing machine is interrupted and an alarm is delivered to the user. The washing machine flood prevention system includes a control box housing a control circuit. The control circuit includes at least one alarm and a power outlet adapted for receiving the electrical plug of the washing machine. A water level sensor, such as a float switch, is in communication with the control circuit. A ground fault circuit interrupter is in electrical communication with the control circuit. The ground fault circuit interrupter provides interruptible electrical power to the control circuit and the washing machine. The electrical power is interrupted if a control signal is generated by the water level sensor responsive to a flood.

The invention discloses a construction method of a flat shoal flow prediction model based on joint control of upstream-downstream borders over a lower reach. The construction method specifically comprises the steps of adopting a one-dimensional hydrodynamic model to calculate and study a water level-flow relation curve of each fixed section in the reach; determining flat shoal flow in each section according to flat shoal elevation in each fixed section; adopting a method based on the combination of geometric average of logarithmic transformation and weighted average of section spacing to calculate the flat shoal flow of reach dimension; analyzing a response relationship of the flat shoal flow adjustment on an upstream water-sediment condition and downstream water level change, and constructing the prediction model based on joint control of the upstream-downstream borders over the lower reach. According to the construction method of the flat shoal flow prediction model based on joint control of the upstream-downstream borders over the lower reach, the calculated and obtained flat shoal flow of reach dimension is capable of better describing the flow passing capacity of the whole reach, and thus the flat shoal flow is more representative; the constructed flat shoal flow prediction model is capable of well reflecting the variation trend of the flat shoal flow along with the upstream water-sediment condition when the downstream water level changes sharply, and thus the constructed flat shoal flow prediction model has a guidance significance in the flood prevention and riverway management.

The invention discloses a method for calculating dynamic water storage capacity runoff yield in soil freeze-thaw process, and belongs to a hydrological science category in geophysical science categories. The method comprises the following steps of: calculating frozen soil depths at different times in grids of a watershed according to soil temperature distribution; analyzing day-by-day spatial distribution conditions of the frozen soil depths so as to obtain field capacities, distributed along with time, of aeration zones in different grids of the watershed; finding out the maximum field capacities in different grids of the watershed, and calculating the maximum water-holding capacity of the watershed; and calculating a soil freeze-thaw runoff yield of the watershed according to the obtained maximum field capacities in different grids and the maximum water holding capacity of the watershed. According to the method disclosed by the invention, the day-by-day soil freeze / thaw, frozen soil depths and soil temperatures can be simulated according to observed air temperatures, and the day-by-day process of thaw / rainfall runoff can be calculated according to rainfall observation, so that the runoff simulation precision in soil thaw periods in spring is improved, scientific basis is provided for the spring flood prevention decisions, and the gap of frozen soil area runoff yield calculation in the existing home and aboard hydrological models is filled.

The invention provides a method for calculating the riverway cross-section flow measured by a non-contact radar. On a riverway cross-section on which a radar probe measurement point is located, cross-section measurement is carried out at a certain distance interval, based on the measured cross-section data, the cross-section polynomial curve fitting is carried out, and the riverway cross-section water surface slope is calculated by combining with a hydraulics manning formula according to the position of a probe, the actually-measured water level, the surface flow velocity and the bed roughness, then based on a hydraulics natural riverway flow calculation principle, a certain number of vertical lines are chosen to divide the riverway cross-section evenly, the depth of water of the verticallines and the corresponding vertical line flow velocity are calculated in sequence, and then virtual vertical lines are made in interval midpoint of each vertical line, a plurality of virtual verticallines and cross-section fitted curves and a riverway water line form a plurality of irregular polygons, the area of each polygon is calculated in sequence, and finally, a weighted area method is usedfor calculating the flow of a riverway large section. The method for calculating the riverway cross-section flow measured by the non-contact radar has important practical value for the popularizationof online flow measurement technology and the high real-time flow monitoring of flood prevention.

The invention discloses an urban flood prevention decision support system based on a big data technique. The urban flood prevention decision support system comprises steps as follows: S1, establishment of a historical water regimen database; S2, acquisition and storage of real-time water regimen data; S3, establishment of a combined water level prediction model; S4, real-time water regimen display and water level prediction; S5, statistical analysis of historical water regimen data. The system has the benefits as follows: the water level in 1-6 hours can be effectively predicted, so that decision support is provided for flood control and disaster reduction work when the urban flood season approaches. The system adopts a distributed database HBase and can effectively store mass water regimen data and cope with rapid growth of data, besides, a big data analysis engine Impala is used for real-time processing and analysis on mass historical water regimen data, intrinsic value of the historical data is explored with a data visualization technology and information guidance is provided for flood prevention work.

The invention provides a method for setting a city initial rainwater interception standard. The city overflow pollution event reduction efficiency and the rainfall pollution reduction efficiency are counted, and high-efficiency areas of the city overflow pollution event reduction efficiency and the rainfall pollution reduction efficiency are found; and required initial rainwater interception rainfall is obtained and enabled to meet requirements of the high-efficiency areas, the flood prevention standard and the water environmental capacity. According to the city initial rainwater interception standard set with the method, initial rainwater with higher pollutant concentration can be intercepted effectively, so that pollution loads of rainfall runoffs to the water environment are substantially reduced.

The invention discloses a complex step reservoir group water storage period optimized scheduling method which comprises the steps of S1, collecting basic information of a river basin; S2, dividing a complex step reservoir group into a plurality of sub-river-basin areas, and respectively calculating an after flood season of each sub-river-basin area; S3, estimating a probability that the flow of a branch flood prevention node exceeds a safe flow in each sub-river-basin area, and demonstrating feasibility of seasonal flood end water storage scheduling optimization by means of the probability; S4, constructing a multi-target water storage scheduling optimization model; S5, solving the multi-target water storage scheduling optimization model by means of a Pareto dynamic dimension searching method, and obtaining a certainty optimization scheduling result of a seasonal flood end water storage period; S6, extracting an optimization scheduling rule of the seasonal flood end water storage period by means of a large system polymerization / decomposition model; and S7, performing flood prevention safety examination on the optimization scheduling rule through using river basin designed flood as an input. The complex step reservoir group water storage period optimized scheduling method is a new method for complex step reservoir seasonal flood end water storage period optimized scheduling under a precondition that a flood prevention standard of the basin is not reduced.

The flood prevention device includes a plurality of barrier walls interconnected around a structure or area to be protected. Each barrier wall includes a base sand tube adapted to be filled with sand. At least one gill tube may be stacked atop the sand tube and stitched together to form a wall of desired height. Each gill tube includes a plurality of reinforced gills adapted to permit water flow to fill the gill tube. A hanging tube is operatively disposed above each wall. A pulley mooring system may be disposed on the sides of the structure with one end operatively attached to interlocking poles disposed in the hanging tubes. Opposing sides of each barrier wall include interlocks that may be selectively attached to a locking corner track or a locking extender track to form the overall barrier. Once assembled, the flood prevention device may be lifted or rapidly deployed by the pulley mooring system.

The invention belongs to the technical field of water circulation of water conservancy projects and particularly relates to a distributed-type river basin water deficit calculating method based on terrain and soil characteristics. The method comprises the following steps: step1, processing basic data of an underlying surface of a river basin; step 2, counting grid terrain indices within basin perimeters; step 3, calculating soil characteristic parameters within the basin perimeters; step 4, quantitatively expressing distribution of river basin water deficit; and step 5, drawing cumulative distribution curves of river basin water deficit to acquire a calculating model of distributed-type river basin water deficit. when being applied to real-time flood forecasting, The distributed-type river basin water deficit calculating method based on the terrain and soil characteristics can substantially improve accuracy of flood forecasting and provide reliable scientific support for river basin flood-prevention early warning and the like. The distributed-type river basin water deficit calculating method based on the terrain and soil characteristics is not only suitable for a lumped-type hydrological model but also suitable for a distributed-type hydrological model and can effectively promote in-depth development of river basin hydrology science research.

The invention relates to a structuring method of a self-adaptive drainage basin medium-long-term runoff forecasting model. The structuring method includes steps of classifying a forecasting runoff tobe different sub-streams according to the forecasted drainage basin feature to forecast in different basins; building forecasting factor sets of different sub-streams; applying a gathered forecastingmethod to every sub-stream; adjusting different model parameters in the forecasting method by the self-adaptive method; applying a riverway calculation method to the forecasting result of the sub-stream to obtain the final drainage basin forecasting value; periodically testing the certainty coefficient of the forecasting result to judge if the forecasting factor and the formation of the forecasting method are required to update. The runoff forecasting result acquired through the method can provide a reliable basis for the forecasting of urban flood prevention or inflow of large reservoirs.

The invention provides a water quality safety early warning decision making system. The system is a full-process complete system formed by an on-line monitoring base station layer, a server layer and a water quality safety early warning platform layer. On the basis of the on-line monitoring base station, the server layer serves as a support, and a water quality safety early warning platform serves as a core. The on-line monitoring base station comprises a water inlet unit, a water quality on-line monitoring unit, a pump station operation monitoring unit, an automatic control unit and a remote transmission unit. The water quality safety early warning platform comprises the eight service modules of station measuring information management, water quality data management, statistics and analysis management, operation alarm management, water quality safety early warning and information issuing management. The system can achieve the multiple functions of pipeline running water quality and amount on-line monitoring, remote transmission, data storing, real-time issuing, water quality early warning and remote decision making in rainfall events of a drainage system. Supports can be provided for optimization operation of a city drainage pump station, and decision making bases can be provided for a win-win scheduling model of flood prevention safety and water quality safety of the drainage system.

A floor drain assembly with integrated flood prevention, comprising a unitary construction which may be retrofitted into existing floor drain plumbing without modification to the plumbing or surrounding floor. The floor drain assembly comprises an integrated check valve, which under normal circumstances remains open, allowing spilled or poured liquids to drain through the assembly into the sewer plumbing. In an event such as storm flooding or sewage water back up, the water level within the pipe will exert buoyant force upon the check valve, causing it bias against a sealing means, thereby preventing liquid and sewage waste from rising up through the pipe opening and entering a building, causing flooding.

The invention relates to a river channel water and sediment real-time prediction method based on data assimilation, and belongs to the technical field of water conservancy projects. The method includes the steps of firstly, collecting topographic data of a water channel to be predicated, upstream boundary condition data, downstream boundary condition data and fracture surface data of the river channel, setting up a one-dimensional non-steady-flow and non-balance sediment transport model, and solving the model; secondly, conducting water and sediment model assimilation on real-time observation data while receiving the real-time observation data, and enabling the assimilation value to serve as an initial field for calculation; thirdly, calculating the changes of the future water level, the further flow and the future sediment concentration according to information of the initial field and the boundary condition data. According to the method, the water level and flow speed prediction function, the flood forecast function and other functions are achieved on the basis of data such as the assimilation real-time water level, the flow speed and the sediment concentration, and the method has the advantages of being strong in pertinency, comprehensive in function, convenient to use, practical and the like, can be applied to river channel flood real-time forecasting of great rivers, and provides the decision-making support for the practical flood prevention command work.

The invention discloses a rainfall observation method integrating satellite remote sensing and mobile communication base station signals, which comprises the following steps of: for each microwave link in a target area, respectively establishing the connection between rain attenuation and rain intensity by adopting different rain attenuation and rain intensity models, and deducing the corresponding link rainfall intensity; dividing grids for the target area, and deducing the regional rainfall capacity under different rain attenuation and rain intensity models in the historical period; optimizing a rain attenuation and rain intensity model through large-scale observation data in a historical period of satellite remote sensing; and observing real-time rain intensity information with high spatial resolution based on real-time dynamic rain attenuation data of the mobile communication base station by adopting the optimized rain attenuation and rain intensity model. The method gives full play to the advantages of a satellite remote sensing rainfall observation technology and a microwave link real-time rainfall intensity observation technology, provides a real-time, dynamic and high-precision rainfall observation mode, and can provide important and highly operable reference basis for flood prevention and disaster reduction and drainage basin planning.

The invention relates to hydraulically automatic lifting flood prevention walls which are arranged along the inner side of a river levee in a paralleling manner. Each hydraulically automatic lifting flood prevention wall comprises a driving device, locking mechanisms, vertical columns, a base and a baffle, wherein the base is a hollow cavity; the baffle is assembled in the inner cavity of the base through the vertical columns in the vertical direction; sliding chutes corresponding to the baffle are formed in the side parts of the vertical columns; the driving device corresponding to the baffle is arranged in the inner cavity of the base, and comprises a waterwheel and a pulley group; the waterwheel drives the baffle to move up and down through the pulley group along the sliding chutes; by the arrangement of the lifting baffle, the baffle is hidden in the base of each flood prevention wall in the non-flood season; when flood occurs and reaches a specific water level, the flood prevention baffle automatically rises up under the action of the traction force of the waterwheel; after the baffle rises up and reaches the upper parts of the vertical columns, bayonets at the top of the baffle are connected to the locking mechanisms on the vertical columns, to form a fixed connection relation; and the baffle is used for blocking the flood, to complete the flood prevention task.

The invention discloses a hydropower-station flood optimization dispatching method which takes gate operation rules into consideration. The method includes five steps: (1) structural description of the gate operation rules, which solves an expression problem of the complex gate operation rules; (2) instantiation of the gate operation rules, which solves a problem of how to use the structural-body examples of the gate operation rules to describe specific hydropower-station gate operation rules; (3) optimization generation of a gate opening combination number sequence, which solves a problem of coupling of the gate operation rules and traditional hydropower-station flood optimization dispatching methods; (4) optimization adjustment of the gate opening combination number sequence, which solves problems that in a flood dispatching process, during specific periods, water level exceeds the limit and at the end of a dispatching period, deviation exists between the water level and a target water level; (5) generation of a gate operation plan, which solves a problem of generating the gate operation plan dynamically according to the gate opening combination number sequence. The hydropower-station flood optimization dispatching method which takes the gate operation rules into consideration improves prediction accuracy of a later-period flood-discharge flow process and improves the rapid response capability of a flood prevention decision of a hydropower station.

The invention provides an urban accumulated water prediction and safety early warning system based on a flood drainage model. The urban accumulated water prediction and safety early warning system combines the flood drainage model, weather forecast, an accumulated water on-line monitoring system and a decision support system, and achieves support for urban accumulated water prediction and safety early warning. The urban accumulated water prediction and safety early warning system comprises the following steps: (1) combining a pipe network model with a production and confluence model to construct a flood drainage model; (2) depending on a flood drainage model, performing multi-scenario rainfall simulation and warehousing; (3) collecting and reporting real-time rain condition data; (4) calling a multi-scene rainfall bank; and (5) carrying out online prediction and safety early warning on road ponding. The urban accumulated water prediction and safety early warning system based on a flooddrainage model can effectively, accurately and dynamically forecast the flood prevention and drainage conditions of urban ponding-prone points in real time, and can facilitate decision support of a management department.

The invention discloses an intelligent lighting control system employing Internet of things for an intelligent city. The intelligent lighting control system comprises an intelligent lighting street lamp, wherein the intelligent lighting street lamp is provided with an environment monitoring system, an image collection system, a lighting system, an information broadcast system, an intelligent charging system, a main control system, a wireless communication system and a micro-base station; the environment monitoring system, the image collection system, the lighting system, the information broadcast system and the intelligent charging system are connected with the main control system; the main control system is connected to a cloud platform through the wireless communication system or the micro-base station; the cloud platform is connected to an intelligent measurement and control terminal server and a data storage server through a 3G or GPRS network; and the intelligent measurement and control terminal server and the data storage server are connected to a public client and a dedicated client through the Internet of things. According to the intelligent lighting control system, relevant information is transmitted to relevant departments; urban departments can conveniently know the information in real time and issue the information of flood prevention, early warning and the like; the intelligent control degree is high; and a highly-centralized intelligent management control system is achieved.

The invention relates to the field of flood prevention informatization and weather application, in particular to a typhoon landing similarity analytical method based on the GIS. According to the method, the range of coastlines where a typhoon possibly lands is analyzed by means of the GIS through a forecasted path of the typhoon, a needed list of typhoons which land on similar places is obtained through analysis of the typhoons passing through the coastlines and historical typhoons, and the list of typhoons with similar landing places and similar strength in history can be provided before the typhoon lands, when the typhoon lands and after the typhoon lands, and historical experience references are provided for scientific typhoon prevention.

The invention relates to an alarm system for disaster and flood prevention, which comprises: a sensing device for monitoring disaster situation information and converting the information into electric signals; a field controller for receiving the electric signals from the sensing device and sending out alarm commands; an alarm device for receiving the alarm commands and giving an alarm; a central controller for remotely controlling the field controller; and a power supply for supplying electric power for the sensing device, the field controller, the alarm device and the central controller. The alarm system can effectively alarm and forewarn flood disaster situation, and can achieve field and remote centralized control.

The invention relates to a flood prevention dispatching decision support system, which comprises an on-line model server, a database, a data interface and a WEB application server, wherein the on-line model server is used for receiving hydrologic remote measurement data, and performing flood prediction simulation according to the hydrologic remote measurement data; the database is connected with each piece of hydrologic remote measurement equipment, and is used for storing hydrologic remote measurement data collected by the hydrologic remote measurement equipment; and the data interface and the WEB application server are respectively connected with the database and the on-line model server, are used for pushing the hydrologic remote measurement data in the database to the on-line model server, receiving the prediction simulation result and issuing the prediction simulation result to a remote network terminal. Compared with the prior art, the flood prevention dispatching decision support system has the advantages that the on-line model server performs flood prediction simulation according to the hydrologic remote measurement data; the outward issuing of the prediction result is realized through the data interface and the WEB application server; the rainfall water accumulation condition is simulated in real time according to the rainfall condition; the water accumulation point positions, the water accumulation depth and the water subsiding time are predicted; and the decision support is provided for water discharge emergency rescue and pump station optimization operation.

The invention relates to a dynamic operation water level control method for a 3D or higher cascaded reservoirs in flood season. The method comprises the steps that 1) the relation of upper pre-impounded water level limits among the 3D or higher cascaded reservoirs is analyzed on the basis of an aggregation-decomposition theory and a pre-impounding pre-discharge method; 2) an optimized scheduling module which takes the minimal flood prevention risk rate, the minimal under-generation risk rate and the minimal under-impounding risk rate in the effective forecast period of a flood forecast as target functions, the operation water level in the flood season as a decision variable, and a manual fish swarm algorithm as an optimized solution algorithm is established, a non-inferior solution set is provided for dynamic operation water level control in the flood season, and a decision scheme set is provided for a multi-target decision module; and 3) the multi-target decision module which takes the minimal flood prevention risk rate, the minimal under-generation risk rate, the minimal under-impounding risk rate, the maximal generation capacity and the maximal impounding rate as evaluation indexes and a network analysis method as a multi-target evaluation method is established, and a preferable decision scheme of the dynamic operation water level control in the flood season is selected. Thus, theoretical basis and technical support are provided for scientifically making a combined dynamic operation water level control scheme for the cascaded reservoirs in the flood season.

The invention discloses a combined model water level prediction method based on similarity search. Water level of previous days related to a day to be predicted is confirmed to be sequences to be matched by utilizing correlation coefficient. A series of water level time sequences which are not similar to the sequences to be matched are searched from historical data on the basis of similarity search and eliminated from original time sequences and then act as training sets of a prediction model. The method mainly comprises data preprocessing, similarity search and a combined prediction model. Data preprocessing aims at filling gap data and restoring error data. According to similarity search, a series of time sequences which are not similar to the sequences to be matched are eliminated from the historical data of previous years by utilizing dynamic bending distance and the fixed slide window technology. The combined prediction model has two basic models: a BP neural network improved by an LM algorithm and a support vector machine, and proportion of the basic models in current prediction is dynamically adjusted by utilizing the Bayes theorem according to prediction performance of each basic model at the previous moment. The high-precision and real-time requirements required by flood prevention and disaster resistance can be realized.

The invention relates to a novel modeling and controlling method of a drain pipe network hydraulics system. The conventional computation method is more time-consuming and not beneficial to real-time control. The novel modeling and controlling method disclosed by the invention is a method for rapidly computing the water depth of a pipeline by utilizing a transfer function model. Through the adoption of the method disclosed by the invention, the regional sewage overflow pollution is minimized on the premise of fully utilizing all water storage equipment of a system so that the urban flood-prevention and anti-waterlogging capabilities are improved; in addition, a basis is settled for the conversion from manual operation to automatic operation of a combined sewerage system; meanwhile, the situation that sewage overflow happens while residual water storage systems are idle at a specific region is avoided; and therefore the regional sewage overflow pollution is finally minimized.

The invention relates to a method of decreasing sewage overflow in combined flow pipe, which is controlled by fuzzy control under the base of layered control principle. For decreasing the generation of sewage overflow in combined flow pipe, prior methods have many shortages. The invention makes use of the urban multi-pump pipe network system built by the urban GIS system to divide the multi-pump pipe network system into several layers; each layer can be divided into several water drainage cells; each water drainage cell solves the minimum problem of partial sewage overflow by using fuzzy control; finally the sewage overflow in the whole system area is controlled to improve the urban flood prevention and anti-waterlogging ability and establish the foundation of operation of combined water drainage system from hand to automation.

The invention relates to a smart city flood disaster processing system based on geographic integration informatization. The smart city flood disaster processing system comprises a flood situation datamonitoring module, a video monitoring module, an underground pipe network flow control module, a big data comprehensive management module, a command and dispatch module and an information storage module. The big data comprehensive management module analyzes the flood situation and change of each point monitored by the flood situation data monitoring module in combination with a database accordingto the monitoring data provided by the flood situation data monitoring module, and timely responds to the flood situation and change of each point monitored by the flood situation data monitoring module; the flow meters are arranged at an inlet and an outlet of each ground or underground drainage pipe network; the flow dynamic state in each pipe network is monitored in real time, and the purposesof balancing the drainage capacity of each area when the rainfall is severely uneven and preferentially guaranteeing drainage and flood prevention of important areas are achieved by reasonably prejudging and deploying the states of each valve and each water pump in the underground pipe network flow control module.

The invention provides a navigation channel rectifying social stability risk automatically analyzing method and a system. The method comprises the following steps: inputting all risk indexes required of an index system for the navigation channel rectifying social stability risk grade evaluation wherein the risk indexes include natural environment, social environment, flood prevention, navigation and other security factors; carrying out weight assignment to the risk indexes and confirming risk grades; and according to the risk analyzing results, comprehensively evaluating the risk of a project, outputting key risk points and providing warnings. With the technical schemes to comprehensively analyze risks, it is possible to make corresponding precautions and emergency measures to key risk points in a more targeted manner so as to ensure that a project is smoothly implemented while the costs to prevent risks as well as to find emergency measures are reduced. Therefore, the method and the system have an importance marketplace.

The invention provides an intelligent flood prevention well lid, the well lid comprises an outer lid, an inner lid, a gear plate, a driving mechanism, a water level sensor and a control box, wherein the diameter of the inner lid is less than the same of the outer lid, the inner lid is connected with the lower surface of the outer lid through a pivot mechanism, inner drainage holes are arranged on the inner lid, outer drainage holes corresponding to the inner drainage holes are arranged on the outer lid, a oblique water check hole is arranged on the edge of the outer lid far away from the inner lid, the circumference surface of the inner lid is a gear surface, the gear plate is arranged on the side of the inner lid and is engaged with the inner lid, the driving mechanism is connected with the gear plate, the water level sensor is arranged in the water check hole, the control box is arranged on the lower surface of the inner lid, the control box is electrically connected with the driving mechanism and the water level sensor; when the water level sensor is flooded, the control box controls the driving mechanism to drive the inner lid rotating from a first position to a second position according to a sensor signal, when the inner lid is on the second position, the inner drainage holes and the outer drainage holes are matched with each other. The well lid can block the rubbish and other things and can drain according to the water yield.