7 results about "Urban runoff" patented technology

The application provides a method for determining inflow hydrograph of urban stormwater inlet, which is in line with actual urban runoff conditions and can effectively reduce the error of calculation results. The urban area is divided into multiple sub-regions according to the road network, and the net rainfall is discharged from the stormwater inlet, and the single stormwater inlet in the sub-region is calculated respectively; the urban surface runoff is calculated by using the comprehensive runoff coefficient method, and the runoff coefficient not greater than 1 is used to represent the runoff after the rainfall is intercepted and lost on the ground; for the rainfall in the small urban area, the ground water flow is in the form of slope flow and shallow concentrated flow; the catchment time is the sum of the two, the slope flow with a flow line not greater than 90m is calculated by using the Manning dynamics method to calculate the surface runoff flow time; after the slope flow stops flowing for 90m, the shallow concentrated flow with a water depth greater than 3cm appears at this time, and the stormwater inlet design flow inflow calculation formula is: Q = F * (P - S) / (T + 90) wherein Q is the stormwater inlet inflow, L / min; F is the average catchment area controlled by each stormwater inlet, m 2 .

The application discloses a kind of based on RF-GA fitting biological retention facility construction design method and electronic equipment, comprising: with existing biological retention facility hierarchical structure parameter and existing environmental parameter establish original data set;Existing environmental parameter includes when running city runoff rainwater concentration and the concentration data of effluent after treating pollutant;Original data set is used for training RF model after being preprocessed;Acquire target city environmental parameter, determine the numerical range of different structure parameters in existing biological retention facility hierarchical structure parameter, and splice with target city environmental parameter;Spliced data is input into the RF model trained, combined with GA algorithm, obtain the parameter combination of target city biological retention facility hierarchical structure and the effluent concentration of pollutant under this combination;Based on this method, the hierarchical structure of biological retention facility can be designed specifically, and the effluent quality of this hierarchical structure is predicted, which helps to improve the purification effect of biological retention facility.

The application provides a kind of urban drainage system river-entering water quantity calculation method and system based on GIS platform and open source data, which comprises obtaining open source data of drainage area to construct basic database and store it in GIS platform;Based on the spatial resolution of open source GIS data in the basic database, the drainage area is divided into multiple independent calculation units and the parameter value of each independent calculation unit is obtained;Construct the runoff model of each independent calculation unit and combine the parameter value of each independent calculation unit to obtain the runoff and sewage flow of each independent calculation unit;The concentration flow of the drainage area is obtained by using the transport time algorithm;Based on the concentration flow of the drainage area and combined with the treatment capacity of the sewage plant in the drainage area, the river-entering water quantity of the drainage area is obtained.The method of the application is easy to obtain, widely applicable, and has high reliability and high time accuracy of the calculation result, which is helpful for the control and management of urban runoff pollution.

The invention provides an urban pavement rainfall runoff particulate matter transmission rate calculation method based on a control layer concept, and the method comprehensively considers the influence of raindrop splashing and runoff shearing composite driving effect on particulate matter transmission by establishing a double-layer conceptual model comprising a static control layer and a dynamic runoff layer. The particulate matter concentration change process under the action of different driving forces is solved through a mass conservation equation, a slope rainfall runoff analytical solution equation is combined, an improved Euler method is adopted for numerical solution, and accurate calculation of the urban pavement particulate matter transmission rate is achieved. According to the method, traditional empirical parameters are converted into variables with clear physical significance, the problems that an existing model is unclear in physical mechanism and low in prediction precision are solved, a scientific basis can be provided for urban runoff pollution load calculation and accurate prevention and control, and the method has the advantages of being clear in physical significance, high in calculation efficiency, good in prediction precision and high in engineering applicability.

The invention discloses a sponge city runoff evaluation method and system, and belongs to the technical field of runoff monitoring, and the method comprises the steps: processing image data obtained based on an unmanned plane oblique photography technology, and obtaining a DOM and a DEM of a sponge city research region; according to the DOM and the DEM, using ArcGIS software to divide sub catchment areas and extracting geometric parameter data of the sub catchment areas; obtaining infiltration parameter data required by the SWMM model based on the unmanned aerial vehicle oblique photography technology through a soil infiltration experiment; and inputting the geometric parameter data and the infiltration parameter data into the SWMM model, carrying out manual calibration on residual parameters of the SWMM model, adding rainfall data, constructing the SWMM model based on an unmanned aerial vehicle oblique photography technology, and evaluating a sponge city total runoff amount control target by simulating and researching a regional surface runoff process. According to the method, the evaluation accuracy of sponge city runoff simulation is improved, and the requirement for simulation of total runoff control of a single facility or a higher-precision model in sponge city construction can be met.

The invention relates to a watershed runoff pollution characteristic dynamic integration clustering zoning method fusing multi-source spatio-temporal data and landscape ecological characteristics, and the method comprises the steps: carrying out the data collection and preprocessing of related impact factors, such as urban rainfall runoff pollution data, meteorological element data, urban humanity attribute data, land utilization landscape pattern distribution data, and the like; establishing a multi-source heterogeneous data set; constructing a runoff pollution characteristic clustering system of different spatial scales of the watershed; and constructing a rainfall runoff pollution zoning system in combination with a clustering result. According to the method, runoff pollution data, meteorological element data, urban humanity attribute data and landscape pattern distribution data are combined, the influence of climate, urban humanity and land utilization on space-time distribution of surface runoff pollution is comprehensively considered, and runoff pollution characteristics of different regions are evaluated; and further support is provided for urban runoff pollution treatment and sponge city construction.

The invention discloses a bioretention facility construction design method based on RF-GA fitting and electronic equipment. The method comprises the following steps: establishing an original data set according to existing bioretention facility hierarchical structure parameters and existing environmental parameters; the existing environmental parameters comprise urban runoff rainwater concentration during operation and treated pollutant effluent concentration data; the original data set is preprocessed and then used for training an RF model; obtaining target city environment parameters, determining numerical value ranges of different structure parameters in the hierarchical structure parameters of the existing bioretention facility, and splicing the numerical value ranges with the target city environment parameters; inputting the spliced data into a trained RF model, and combining a GA algorithm to obtain a parameter combination of the hierarchical structure of the target urban bioretention facility and the pollutant effluent concentration under the combination; based on the method, the hierarchical structure of the bioretention facility can be designed in a targeted manner, the effluent quality condition of the hierarchical structure can be predicted, and the purification effect of the bioretention facility can be improved.