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A simulation method of reconfiguration and confluence based on the characteristics of the underlying surface

A simulation method and reconfiguration technology, applied in the direction of instrumentation, design optimization/simulation, calculation, etc., can solve problems affecting the effect of early warning and forecasting, calculation deviation of hydrological model confluence, and hidden dangers of mountain torrent disaster prevention, so as to achieve stable and reliable data sources and promote In-depth development to ensure the effect of objective rationality

Active Publication Date: 2020-10-02
HOHAI UNIV
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Problems solved by technology

[0005] Therefore, the use of a single confluence calculation method often fails to take into account the influence of the spatial variability of the underlying surface characteristics of the watershed on the confluence process, which brings certain deviations to the confluence calculation of the hydrological model, which in turn affects the final early warning and forecasting effect. Bring certain hidden dangers to mountain torrent disaster prevention and control

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  • A simulation method of reconfiguration and confluence based on the characteristics of the underlying surface
  • A simulation method of reconfiguration and confluence based on the characteristics of the underlying surface
  • A simulation method of reconfiguration and confluence based on the characteristics of the underlying surface

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Embodiment 1

[0086] 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. The rainstorm centers are mostly concentrated in the middle and upper reaches of the basin, and the average rainfall in the basin lasts about 30 hours. 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.

[0087] Step 1. Encapsulate the confluence calculation mode and number them respectively, which specifically includes the following steps:

[0088]Step 1.1, based on the principle of diffusion wave confluence, construct the confluence pattern KP in the slope;

[0089]

[0090] Where: h s is the water ...

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Abstract

The invention discloses a reconfiguration confluence simulation method based on underlying surface features, and belongs to the technical field of hydrology. The reconfiguration confluence simulationmethod comprises the following steps: 1, packaging confluence calculation modes and numbering the confluence calculation modes respectively; 2, calculating to obtain a gradient grid Raster_Slope, a flow direction grid Raster_Dir and a confluence accumulation grid Raster_Acc on the basis of the basin DEM data; 3, extracting and obtaining river channel grids and slope surface grids in the drainage basin, and grading the river channel grids; and 4, dividing grids in the graded drainage basin based on the gradient grids and the riverway into four areas of KP, YP, MH and FH, and respectively matching different confluence modes in different areas to perform confluence calculation. The reconfiguration confluence simulation method guarantees the precision and reliability of a calculation result, solves a problem of confluence calculation in mountainous small and medium-sized watersheds with obvious underlying surface feature spatial variation, facilitates the direct call of a confluence calculation method based on underlying surface features, and promotes the deep development of digital hydrology and mountainous small and medium-sized watershed mountain torrent prevention and control research.

Description

technical field [0001] The invention belongs to the technical field of hydrology, and in particular relates to a reconfiguration and confluence 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 urge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/28G06T13/60G06F113/08
CPCG06T13/60G06T2210/24Y02A10/40
Inventor 姚成童冰星李致家朱跃龙
Owner HOHAI UNIV
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