Wide and narrow alternate river reach mountain torrent flooding disaster vulnerable area identification method based on mountain river form and flood level change
An identification method, flood level technology, applied in climate change adaptation, mapping and navigation, open-air water source survey, etc., can solve problems such as lack of land
Active Publication Date: 2020-01-24
SICHUAN UNIV
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Problems solved by technology
Due to the extreme lack of usable land in mountainous areas, the rare floodplains of mountainous rivers are often used as farmland and building houses. At present, there is still a lack of scientific methods for the use of land along the wide and narrow sections of mountainous rivers and the identification of mountain flood disaster-prone areas. guide
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[0071] In this embodiment, a wide and narrow section of the Guanshan River, a tributary of the Han River, is taken as an example to illustrate a method for identifying disaster-prone areas for mountain torrent inundation based on the shape of rivers in mountainous areas and changes in flood levels.
[0072] Guanshan River is a tributary of the Han River, with a total length of 163km and a drainage area of 880km 2 . The topography of a certain wide and narrow section of Guanshan River is as follows: Figure 5 As shown in , the target reach has a narrowing-widening structure, that is, the target reach has the following Figure 5 The structure shown is that a narrowed river section is connected with a widened river section, and there are disaster prevention protection objects such as cultivated land, houses, and roads in the widened river section of the target river section. This embodiment takes the wide and narrow river section as an example. The method provided by the inve...
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The invention provides a wide and narrow interphase river reach mountain torrent flooding disaster vulnerable area identification method based on mountain river form and flood level change. The wide and narrow interphase river reach mountain torrent flooding disaster vulnerable area identification method comprises the following steps: (1) selecting a wide and narrow interphase river reach of a mountainous area river as a target river reach; (2) numbering the narrowing-broadening structure with the disaster prevention protection object at any broadening river reach as Mi, i = 1, 2,..., n; (3) measuring the river width of the narrowest part and the river width of the widest part of the narrowed-broadened river reach of the narrowed-broadened structure with the number of Mi, and measuring theriverbed gradient of the narrowed river reach and the broadened river reach; and (4) at the moment, taking the broadened river reach of the narrowing-broadening structure with the number of Mi as a mountain torrent flooding disaster-prone area. The wide and narrow interphase river reach mountain torrent flooding disaster vulnerable area identification method provided by the invention can quicklyand accurately identify the mountain torrent inundation disaster-prone area of the wide-narrow alternate river reach of the mountainous river, and provides scientific and reliable guidance for safetyplanning and mountain torrent inundation disaster prevention and control of the coastal human activity area of the wide-narrow alternate river reach of the mountainous river.
Description
technical field [0001] The invention belongs to the field of early warning of mountain torrent disasters in mountainous watersheds, and relates to a method for identifying disaster-prone areas of mountain torrent inundation disasters in alternate width and narrow river sections based on the shape of rivers in mountainous areas and changes in flood levels. Background technique [0002] my country is a mountainous country. Mountainous rivers are constrained by geological conditions in canyon areas. After a very long period of adjustment, they often form a wide and narrow shape. Affected by heavy rain, floods and river shapes, mountain torrent disasters occur frequently in areas along mountainous rivers. occur. There are more than 2,800 county-level administrative regions in my country, more than 1,500 of which are distributed in mountainous areas. The rivers in mountainous areas have steep slopes and rapid flows, and there are very few habitable lands. . However, due to the in...
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IPC IPC(8): G06F30/20G06Q50/26G01C13/00G06F111/10G06F119/14
CPCG01C13/00G06Q50/265Y02A10/40
Inventor 王协康刘兴年许泽星闫旭峰
Owner SICHUAN UNIV