Part One: Application of CAD and GIS in Hydraulic Modeling
1.1 Rapid modeling of complex urban drainage network systems: Through standardized steps, use CAD data and GIS data to establish SWMM models. Take advantage of different software at different stages of modeling to achieve efficient data processing, accurate parameter assignment, and rapid model establishment. Under the condition of not increasing the cost, the establishment of the hydraulic model is realized by using commonly used software.
1.2 Production of thematic maps of the hydraulic performance of the pipe network: use the calculation results of the SWMM model, combined with the rich rendering and mapping capabilities of GIS, to create thematic maps for drainage system performance evaluation. Typical thematic maps include: node overflow color map, pipe segment flow rate color map, and pipe segment response return period color map. Visually display the problems of the drainage system and the implementation effect of the planning scheme
Part II: In-depth application of SWMM model
Judgment and control of pumps, pipes, orifices, weirs and vent pipes.
2.2 SWMM water quality simulation function: Realize the simulation of the accumulation of ground pollutants and the process of rain erosion to obtain the calculation results of the concentration of pollutants at different positions of the pipe network over time.
2.3 SWMM water quality treatment function: use the treatment attribute of the node to use the node as a water treatment structure to realize the water quality treatment function.
Part III: One-dimensional and two-dimensional coupling simulation of urban waterlogging
3.1 One-dimensional and two-dimensional coupling simulation of urban waterlogging: use Huitian drainage digital analysis platform to realize one-dimensional and two-dimensional coupling simulation calculation of urban waterlogging, and give simulation results of submerged depth, flow direction, and flow velocity point of ground waterlogging water body .
3.2 Production of thematic map of waterlogging submergence depth: Through the one-dimensional and two-dimensional coupling simulation results of urban waterlogging, the urban waterlogging situation is analyzed, and the analysis can be successfully made into a thematic map of urban waterlogging submergence depth.
3.3 Statistical analysis of waterlogging simulation results: Statistical analysis of submerged depth can be carried out on designated plots, and statistical results of data such as the maximum, minimum, average, and total submerged area of submerged depths of different plots can be obtained, and statistics of submerged depth and area can be customized .
3.4 Submerged depth-time curve: the submerged depth-time curve of the submerged area can be drawn.
Part IV: Calculation of Key Control Indicators for Sponge City
4.1 Modeling for sponge cities: establish hydrological and hydrodynamic models for sponge cities, and calculate the annual runoff control rate and pollutant reduction rate of plots based on the principle of water conservation.
4.2 Calculation of the total annual runoff control rate: the calculation results of the total annual runoff control rate of the model as a whole and a single catchment sub-area can be obtained with one click.
4.3 Calculation of pollutant reduction rate: The calculation results of the pollutant reduction rate of the model as a whole and a single catchment sub-area can be obtained with one click.
Part V: Secondary Development Basis of SWMM
5.1 Calling of interface functions of SWMM dynamic link library: compile SWMM source code to generate dynamic link library files, and introduce interface function functions and calling methods. On-site programming realizes the simulation function.
5.2SWMM binary simulation result file structure analysis: parsing the out file enables flexible extraction of simulation results. On-site programming realizes the specified result extraction function in the out file.
