A method for reconfiguration runoff simulation based on underlying surface characteristics

Abstract

The invention discloses a reconfiguration runoff production simulation method based on underlying surface features, and belongs to the technical field of hydrology, and the method comprises the following steps: S1, packaging runoff production calculation modes, and respectively numbering the runoff production calculation modes; S2, calculating to obtain a terrain index grid based on the basin DEMdata; S3, extracting to obtain vegetation grids and soil grids in the drainage basin; and S4, dividing the drainage basin into four areas of GX, DX, GC and FC based on the terrain index grid, the soilgrid and the vegetation grid, and respectively matching different runoff production modes in different areas to perform runoff production calculation. The accuracy and reliability of the calculationresult solve the problem of runoff calculation in mountainous small and medium-sized watersheds with obvious underlying surface feature spatial variation; a basin digital elevation model is mainly applied, rapid and automatic judgment suitable for different runoff production calculation method areas in a basin and direct calling of a runoff production calculation method based on underlying surfacecharacteristics are facilitated, and deep development of digital hydrology and mountain torrent prevention and treatment research of mountainous small and medium-sized basins is promoted.

Description

technical field [0001] The invention belongs to the technical field of hydrology, and in particular relates to a reconfiguration runoff simulation method based on the characteristics of an underlying surface. Background technique [0002] In recent years, affected by climate change, sudden floods of small and medium-sized rivers caused by local heavy rainfall have occurred frequently, and have become the main disasters causing casualties. There are many rivers in my country, with a drainage area of ​​200 to 3000 km 2 There are nearly 9,000 small and medium watersheds in China. Because small and medium-sized watersheds are usually located in remote mountainous areas with complex terrain and steep slopes, rapidly rising floods can easily cause flood disasters that endanger the personal safety of local residents and the social economy. Therefore, accurate and reliable early warning and forecasting of sudden floods in small and medium-sized watersheds has become an urgent need....

AI Technical Summary

Problems solved by technology

The way of fully storing runoff is often not generally realized in areas with steep slopes, but it is easy to occur in gentle areas

Therefore, topography, vegetation coverage and soil texture are the main factors affecting the areas where full storage and overseepage occur. If the influence of these factors on the runoff process is ignored, the simulation of the runoff process will be inaccurate. Flash flood control leaves hidden dangers

[0006] Therefore, ignoring the spatial variability of underlying surface characteristics is not conducive to the development of runoff methods for hydrological models.

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