A distributed watershed hydrological simulation method based on irregular plot units

Abstract

The invention discloses a distributed watershed hydrological simulation method based on irregular plot units. The method comprises the following steps of carrying out partition discretization on a watershed by adopting the irregular units; designing a data structure supporting irregular plot units; extracting model parameters corresponding to the irregular plot units; designing a distributed basinsimulation framework; improving the slope confluence module, so that the influence of irrigation and drainage activities of paddy fields and ponds on the confluence process can be considered; carrying out parameter optimization; and obtaining an optimized parameter combination and an optimized simulation result according to the obtained parameter range. According to the invention, the distributedwatershed hydrological simulation based on irregular plot units is supported, and the confluence relationship between units is displayed and simulated, and compared with traditional distributed hydrological simulation based on spatial discrete units such as a grid / hydrological response unit, the method has a better practical situation and has a wide application prospect in the fields of drainagebasin scientific management, water pollution treatment and the like in areas with severe agricultural activity influence.

Description

technical field [0001] The invention relates to watershed scientific management and water pollution control, in particular to a distributed watershed hydrological simulation method based on irregular plot units. Background technique [0002] Water is an irreplaceable resource that supports the sustainable development of society and economy. However, under the complex influence of economic development, global climate change and human activities, ecological and environmental problems such as water resource shortage and water pollution have appeared in many areas, which seriously restrict the sustainable development of the country and the region. There is an urgent need for scientific watershed management and governance. As a flexible and effective auxiliary decision-making method, watershed process simulation has been widely used in watershed scientific management. [0003] Hydrological processes in different regions often have different characteristics due to their unique n...

AI Technical Summary

Problems solved by technology

In the existing distributed hydrological models, the spatial discretization is mostly based on raster data models, but it is difficult to accurately express irregular ground objects such as rice terraces and ponds only based on raster data.

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