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Field flood rainfall runoff process defining method

A technology of rainfall runoff and flood, applied in the direction of informatics, instruments, etc.

Active Publication Date: 2019-05-21
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for defining the rainfall runoff process of floods, thereby solving the aforementioned problems in the prior art

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  • Field flood rainfall runoff process defining method
  • Field flood rainfall runoff process defining method
  • Field flood rainfall runoff process defining method

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specific Embodiment

[0062] In this embodiment, the definition of the rainfall runoff process of the 1989 flood in the Lihe River Basin in Hubei is taken as an example to show the effect achieved by the present invention.

[0063] refer to figure 2 , The Li River Basin is located in the north of the Yangtze River in Hubei Province, the southern foot of the Dabie Mountains, and the Xiaogan City area in the northern part of the Jianghan Plain. The total length of the main stream is 8km, and the drainage area is 2590.88km 2 . The terrain of the basin is high in the northeast and low in the southwest, and low eroded mountains and cutting hills are interspersed with each other. The landform is dominated by hills and mountains, with low mountainous areas in the northeast, with an altitude of 500-1000 meters and a relative height of 100-300 meters, and low and gentle hills in the southwest, with an altitude of 100-500 meters. There are 7 rainfall stations in the basin, which are recorded as Station A...

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Abstract

The invention discloses a field flood rainfall runoff process defining method, and relates to the technical field of hydrological forecasting. The method comprises the following steps: determining starting time and ending time of a flood rainfall runoff process; when the rainfall runoff process is defined through the starting time and the ending time, the rainfall process and the flow rising process of the drainage basin outlet section are comprehensively considered; Therefore, by the adoption of the method, under the complex rising conditions that the flood season rainfall duration is long, the rainfall interval time is short, the multi-peak and compound flood occurs in the flood process and the like, the field flood rainfall runoff process can still be clearly and accurately divided through simple operation. The defects in the prior art are overcome.

Description

technical field [0001] The invention relates to the technical field of hydrological forecasting, in particular to a method for defining the rainfall runoff process of a flood. Background technique [0002] At present, in order to study hydrological forecasting, reservoir scheduling, water resources management and other issues, the definition of rainfall runoff process of each flood is one of the essential steps. [0003] At present, the widely used method to define the rainfall runoff process of a flood is: take the flow rise and rise moment of the outlet section of the watershed as the starting point of the flood rainfall runoff process, and take the moment when the flow of the water flow at the outlet section of the watershed is equal to the rise and fall flow as the flood rainfall Termination point of runoff process. This method is based on the flow fluctuation process of the outlet section of the watershed, the identification method is simple, and the identification eff...

Claims

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Application Information

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IPC IPC(8): G16Z99/00
Inventor 常文娟马海波严登华雷晓辉田雨杨明祥王旭王浩李英海彭涛董鑫
Owner CHINA THREE GORGES UNIV