Mountain torrent forecasting method combining rainfall and soil water observation
A technology of soil water and soil water content, applied in forecasting, instrumentation, climate change adaptation, etc., can solve the problems of missing important data, complex causes of mountain torrent disasters, and unclear disaster mechanism, and achieve the effect of improving adaptability
Pending Publication Date: 2021-11-12
ZHEJIANG UNIV
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Problems solved by technology
These prediction methods rely to a certain extent on the real-time data feedback of monitoring equipment. The causes of mountain torrent disasters are complex, and the mechanism of disaster formation is still uncle
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[0035] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0036] A typical small watershed in a certain province was selected as the research object, and the method of flash flood forecasting combined with rainfall and soil water observation was analyzed. By applying the two-dimensional mountain torrent forecasting model to this watershed, it is possible to determine the confluence of the watershed under different rainfall intensities and different soil water contents, and provide a scientific basis for mountain torrent early warning.
[0037] 1) Obtain the hydrological data and soil property parameters of the watershed according to the geological data and hydrological conditions of the watershed;
[0038] Step 1) is specifically:
[0039] The geological data are specifically the distribution of soil layers and vegetation, and the hydrological conditions are specifically historical di...
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The invention discloses a mountain torrent forecasting method combining rainfall and soil water observation. The method comprises the steps of obtaining hydrological data and soil property parameters of a drainage basin according to geological data and hydrological conditions of the drainage basin; judging whether the soil is layered or not according to the soil property parameters, and determining the soil layer distribution condition of the soil in the drainage basin; establishing sensitivity between rainfall and runoff and the soil water content of each soil layer; dividing rainfall sessions of the drainage basin by using a random time-varying rainfall runoff model to obtain hydrological characteristics of each rainfall session; constructing a two-dimensional mountain torrent prediction model of the drainage basin and a relationship between the initial soil water content and the peak present time; and determining predicted runoff in the drainage basin, comparing the predicted runoff with the warning runoff, and judging whether the predicted runoff belongs to mountain torrents or not to realize mountain torrent prediction. The conditions of rainfall and soil water content are comprehensively considered, and the method is closer to the real rainfall runoff production process; the method provides a scientific theoretical basis for mountain torrent prediction of a drainage basin with data, and has positive guiding significance for mountain torrent early warning.
Description
technical field [0001] The invention relates to a mountain torrent forecasting method in the field of mountainous small watershed flood forecasting, in particular to a mountain torrent forecasting method combined with rainfall and soil water observation. Background technique [0002] Existing flash flood early warning methods are mostly reflected in the monitoring and early warning of a single element, and then obtain more accurate prediction results by capturing the natural characteristics of the elements, such as flash flood prediction considering the spatial heterogeneity of rainfall, real-time correction of soil moisture to disaster dynamics, different soil moisture Net rain runoff under the grade, etc. These prediction methods rely to a certain extent on the real-time data feedback of monitoring equipment. The causes of mountain torrent disasters are complex, and the mechanism of disaster formation is still unclear. The objective environment in mountainous areas is also...
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Login to View More IPC IPC(8): G06Q10/04G06Q50/26
CPCG06Q10/04G06Q50/26Y02A10/40
Inventor冉启华叶盛刘琳
OwnerZHEJIANG UNIV