3 results about "Urban runoff" patented technology

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 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.