Distributed-type river basin water deficit calculating method based on terrain and soil characteristics

Abstract

The invention belongs to the technical field of water circulation of water conservancy projects and particularly relates to a distributed-type river basin water deficit calculating method based on terrain and soil characteristics. The method comprises the following steps: step1, processing basic data of an underlying surface of a river basin; step 2, counting grid terrain indices within basin perimeters; step 3, calculating soil characteristic parameters within the basin perimeters; step 4, quantitatively expressing distribution of river basin water deficit; and step 5, drawing cumulative distribution curves of river basin water deficit to acquire a calculating model of distributed-type river basin water deficit. when being applied to real-time flood forecasting, The distributed-type river basin water deficit calculating method based on the terrain and soil characteristics can substantially improve accuracy of flood forecasting and provide reliable scientific support for river basin flood-prevention early warning and the like. The distributed-type river basin water deficit calculating method based on the terrain and soil characteristics is not only suitable for a lumped-type hydrological model but also suitable for a distributed-type hydrological model and can effectively promote in-depth development of river basin hydrology science research.

Description

technical field [0001] The invention belongs to the technical field of water cycle of hydraulic engineering, and in particular relates to a method for measuring and calculating water shortage in a distributed watershed based on topography and soil characteristics. Background technique [0002] The natural water cycle process has an extremely important impact on human economic and social activities. The floods, droughts and uneven distribution of water resources caused by water cycle activities have caused huge losses to the world. In order to be able to understand the process of the water cycle, and to avoid floods and droughts as much as possible through scientific means, hydrology has made a lot of in-depth research on the process of the water cycle. Modern hydrology summarizes the law of water cycle through experiments and physical process analysis, and on this basis combines mathematical and physical methods to establish a hydrological model that can describe the process...

AI Technical Summary

Problems solved by technology

[0004] Although there are currently studies on the impact of topography on soil water shortage in watersheds, most of the research results are described by empirical curves. For example, the Xin'anjiang model proposes a parabolic water storage capacity curve, in which there are empirical parameters Calibration is required, and the theoretical degree of the model structure is not high

Water shortage is closely related to watershed topography and soil texture, but there is no report on combining topography and soil properties to jointly determine soil water shortage

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