Mountain torrent early warning method considering rainfall spatial heterogeneity
A space heterogeneity and mountain torrent early warning technology, applied in the direction of alarms, engine lubrication, climate sustainability, etc., can solve the problems of insufficient comprehensive index information, the impact of mountain torrent early warning accuracy, and the inability to reflect the distribution of rainstorm centers, etc., to achieve The effect of improving accuracy
Active Publication Date: 2020-07-28
HUAZHONG UNIV OF SCI & TECH +1
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Problems solved by technology
Although these indicators can reflect the spatial differences of rainfall, they cannot reflect the distribution of rainstorm centers. The information contained in the indicators is not comprehensive enough to directly calculate the critical rainfall, which will affect the accuracy of flash flood warnings.
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[0043] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0044] Such as figure 1 As shown, the present invention provides a kind of flash flood early warning method considering the spatial heterogeneity of rainfall, comprising:
[0045] S1: Obtain the soil saturation and composite rainfall in the set time period before the occurrence of multiple historical flood peaks in the basin to be warned; the composite rainfall is calculated based on the area a...
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The invention discloses a mountain torrent early warning method considering rainfall spatial heterogeneity, and belongs to the field of hydrological forecasting. The method comprises the steps that: the soil saturation and composite rainfall in a set time period before the occurrence of multiple historical flood peaks of a to-be-warned drainage basin are obtained, wherein the composite rainfall considers both rainfall capacity and rainfall space distribution; a mountain torrent early warning model is constructed according to the soil saturation and the composite rainfall; the soil saturation of the to-be-warned drainage basin is collected, a critical composite rainfall index corresponding to the current soil saturation is obtained according to the mountain torrent early warning model, andthe current composite rainfall of the to-be-warned drainage basin is compared with the critical composite rainfall index, so that whether the flood generated by rainfall is an over-warning flood or not can be judged. According to the method, the non-uniformity of rainfall spatial distribution and a rainstorm center distribution condition can be specifically quantified; the calculated critical composite rainfall index considers both the rainfall capacity and the rainfall spatial distribution, and thus the precision of mountain torrent early warning can be improved.
Description
technical field [0001] The invention belongs to the technical field of hydrological forecasting, and more specifically relates to a flash flood early warning method considering the spatial heterogeneity of rainfall. Background technique [0002] Affected by global warming, the frequency of local heavy rainfall in hilly areas is increasing. With the intensification of human activities in hilly areas, mountain torrent disasters have gradually become the shortcoming of flood control and disaster reduction in my country. To this end, my country has carried out a nationwide survey and evaluation of mountain torrent disasters from 2010 to 2016, and has made considerable progress in the key technologies of mountain torrent disaster prevention, such as mountain torrent disaster risk zoning, forecasting and early warning, and initially established a mountain torrent disaster prevention system. However, on the one hand, my country’s mountain torrent disaster prevention and control is ...
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Login to View More IPC IPC(8): G08B21/10G08B21/18G01F23/00G06F30/20
CPCG01F23/00G08B21/10G08B21/182Y02A50/00
Inventor 闫宝伟杨文发张俊刘昱李正坤江慧宁霍磊曹琛
Owner HUAZHONG UNIV OF SCI & TECH