A Coupling Simulation Method of Distributed Watershed Water-sediment Process

Abstract

The invention relates to a coupling simulation method of a flow and sediment process of a distributed watershed. The method comprises the steps of digital terrain processing, building of a contour strip, building of a contour strip erosion landform data file, data collecting and processing, watershed hydrological process computation, slope erosion and sediment transport process computation, flow and sediment process computation of a channel or a river or a reservoir, judgment, variable parameter transferring, model parameter calibration and model validation, and ending. According to the coupling simulation method, the contour strip is taken as a computing platform for the slope scale, and the real flow and sediment physical process of a slope is taken as a picture, so that the coupling simulation computing capability for rainfall-runoff and erosion-sediment processes of the contour strip slope is achieved; the computational accuracy is ensured on the premise of reducing the computing amount; and the flow and sediment process of the slope with any grid scale is effectively reduced and predicted. Compared with the prior art, the coupling simulation method has the advantages that the terrain adaptability and the scale adaptability are achieved by taking the contour strip as a basic computing unit; meanwhile, deeper recognition of the law of the flow and sediment process of the slope can be achieved on the basis of physical flow and sediment process simulation of the slope and a more complicated practical application is supported.

Description

technical field

[0001] The invention relates to a distributed river basin water-sediment process coupling simulation method, is a hydrological sediment process calculation method, and is a hydrological sediment process simulation calculation method using computer technology. Background technique

[0002] The water-sediment process of the watershed will ultimately be attributed to the water-sediment process of slopes and rivers. The slope water and sediment process is a complex collection of multiple processes, including rainfall, vegetation canopy interception, surface cover interception, surface runoff, soil infiltration, slope confluence, river channel confluence, and reservoir water processes, while associated processes include raindrops Splash erosion, thin layer water flow erosion, channel water flow erosion, gravity erosion, and sediment transport and deposition processes.

[0003] Most of the existing river basin water and sediment process simulations are empirical m...

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