Reconfiguration runoff production simulation method based on underlying surface characteristics

A simulation method and reconfiguration technology, applied in 3D modeling, special data processing applications, image data processing, etc., can solve the problem that the spatial variability of underlying surface features is not conducive to the development of hydrological model runoff methods, and the simulation of runoff process is inaccurate , hidden dangers of mountain torrent prevention and control in small and medium-sized watersheds in mountainous areas, etc.

Active Publication Date: 2019-12-13
HOHAI UNIV
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  • Claims
  • Application Information

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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 f...

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  • Reconfiguration runoff production simulation method based on underlying surface characteristics
  • Reconfiguration runoff production simulation method based on underlying surface characteristics
  • Reconfiguration runoff production simulation method based on underlying surface characteristics

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Embodiment 1

[0117] Taking the Maduwang River Basin in Shaanxi Province as an example, the watershed area is 1601km 2 , located in the west of Shaanxi Province, has a warm temperate semi-humid continental monsoon climate with distinct seasons of cold, warm, dry and wet. Most of the rainstorm centers are concentrated in the middle and upper reaches of the basin. The original DEM data of the study area are 90m resolution SRTM (Shuttle Radar Topography Mission) data jointly provided by NASA and NIMA. The vegetation and soil data use the global 1km resolution soil type and soil use type data released by the University of Maryland.

[0118] Step 1. Encapsulate the production flow calculation model and number them respectively, which specifically includes the following steps:

[0119] 1) Based on the concept-based method, construct the first full-storage flow model, GX;

[0120] When P e ≤0 or P e +W 0 ≤W M Time:

[0121] R = 0

[0122] When P e +W 0 >W M Time:

[0123] R=P e +W 0...

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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....

Claims

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Application Information

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IPC IPC(8): G06T17/05G06F17/50
CPCG06T17/05
Inventor 姚成童冰星李致家朱跃龙
Owner HOHAI UNIV
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