A watershed hydrological forecast method and system with self-adaptive runoff model

Abstract

The invention discloses a watershed hydrological forecasting method and system with self-adaptive runoff mode, belonging to the field of hydrological forecasting in hydrology. According to the characteristics of soil water content and precipitation process in different early stages of the watershed, the invention constructs a watershed runoff model discrimination method based on the integration of full storage runoff, hyperosmosis runoff and mixed runoff; further, according to the dimensionless unit line According to the historical flood process of the basin, the dimensionless comprehensive confluence unit line based on the topography and geomorphological characteristics of the small watershed is deduced; and the flood peak target, peak time target, and deterministic target are used as evaluation indicators to determine the sub-basins. The parameters involved in the optimal runoff model are optimized and calibrated to form a complete forecast system. The invention can determine the optimal infiltration mode of the watershed according to the characteristics of different soil water content and rainfall in the watershed, and determine the unit line of the watershed confluence according to the topographical features of the watershed, and has the advantages of simple calculation, wide application range and high fitting accuracy.

Description

technical field [0001] The invention belongs to the field of hydrological forecasting in hydrology, and more particularly relates to a watershed hydrological forecasting method and system with self-adaptive runoff mode. Background technique [0002] In the past few decades, my country's hydrological forecasting work has been greatly developed, and rich experience has been accumulated, and a large number of flood forecasting methods have achieved remarkable results. Precise situation. The reason is mainly due to the complex underlying surface conditions of small and medium-sized watersheds and the frequent changes in rainfall, resulting in complex and diverse runoff mechanisms. The traditional single runoff theory cannot analyze its infiltration process at all, while the runoff simulation is based on watershed runoff simulation. In the first step, if the runoff simulation effect is not good, the entire runoff process basically cannot achieve satisfactory accuracy. [0003] I...

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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a watershed hydrological forecast method and system with self-adaptive runoff model, the purpose of which is to solve the problems of single runoff method and unanalyzable infiltration mechanism of the watershed in the hydrological forecasting technology. Technical problems, and furthermore, it is impossible to give high-precision forecasts for runoff forecasts in small and medium watersheds

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