3 results about "Kinematic wave" patented technology

The application discloses a high-resolution flood simulation method coupling topological optimization motion wave and cellular automata, comprising the following steps: obtaining the basin data of a target region, and re-projecting the basin data to a high-resolution grid coordinate system to construct an upstream and downstream relationship grid graph; traversing the upstream and downstream relationship grid graph, taking the rainfall runoff obtained at a current time as a lateral inflow, combining a water flow state at a previous time step and an inflow state of a corresponding grid in an upstream to construct a one-dimensional motion wave equation, and solving the one-dimensional motion wave equation to obtain a river water level at the current time; taking the river water level as an initial condition, starting a two-dimensional diffusion process on the basis of the upstream and downstream relationship grid graph, and iteratively obtaining a submerged range and a water depth distribution graph at the current time step; and repeating the above steps to obtain the submerged range and the water depth distribution graph at all time steps. The method provided by the application can realize fast deduction of a large-scale, high-resolution and physically strictly conservative flood evolution process.

The invention relates to the technical field of hydrological analysis and calculation, particularly discloses a flood forecasting method based on structure optimization of a full storage and runoff production model, and aims at overcoming the structural defects of a traditional Xinanjiang model, so that the simulated water circulation process is more fit with the actual situation of a drainage basin by improving runoff production, runoff discharge and a multi-source confluence module of the model. The method comprises the following steps: firstly, introducing an infiltration model related to the soil water content in the aspect of a mixed runoff production mechanism, and deducing a calculation formula of the real-time infiltration capacity of a drainage basin based on a soil water storage capacity curve; secondly, a dynamic outflow and confluence module with a complete theoretical basis is constructed in combination with a water tank outflow and motion wave theory; by the adoption of the flood forecasting method based on structure optimization of the full storage runoff production model, the optimized model can more accurately reflect the hydrological process of dynamic change, can be better applied to runoff forecasting work under different scenes, and can greatly reduce the requirement for forecasting experience of technicians.

A rainwater pipe network design calculation method based on motion wave simulation belongs to the technical cross field of urban rainwater pipe network and hydraulic model. The method adopts the way of runoff coefficient and phi index method to simulate the surface runoff process, is coupled with the equal flow time line method, and completes the calculation of the inflow process line of the rainwater inlet. Based on the secondary development of SWMM, the motion wave module of SWMM is called to simulate the pipe section confluence process, and the simulation results are read. With the flow process line calculation as the core, from the upstream pipe section, the rainwater inlet inflow process line of the design pipe section and the flow process line of the upstream pipe section connected with the design pipe section are superposed, and the peak value is taken as the design flow of the pipe section. Based on the GDAL development technology, the traditional hydraulic design method is adopted to realize the step-by-step design of the pipe network from top to bottom. The motion wave is used to calculate the pipe section confluence, the whole flow process is considered, the actual flow state of the rainwater pipe network is closer, and the design precision of the rainwater pipe network is improved.