Irrigation drainage process simulation and prediction method

Abstract

The invention belongs to the technical field of irrigation, and discloses an irrigation drainage process simulation and prediction method. The method comprises the following steps: 1, constructing a hydrological model of an irrigation area according to the water circulation characteristics of the irrigation area; 2, determining parameters, needing to be calibrated, of the hydrological model; 3, simulating the scene scheme by using the hydrological model after parameter calibration to obtain an irrigation drainage process and a drainage amount; 4, calculating the water discharge amount of the irrigation area through a water balance method, a subentry method and a drainage ratio method; 5, according to the displacement obtained by the multi-method collaborative optimization strategy coupling hydrological model, the water balance method, the subitem method and the drainage ratio method, obtaining the checked total drainage amount; 6, selecting a simulated irrigation drainage process of the hydrological model as a typical drainage process, and performing same-multiple amplification according to the total drainage amount to obtain a day-by-day drainage process of the irrigation area. The drainage process obtained through the method better conforms to the actual situation.

Description

technical field [0001] The invention belongs to the technical field of irrigation, in particular to a method for simulating and predicting irrigation and drainage processes. Background technique [0002] Irrigation and drainage in irrigated areas is an inevitable accompanying process in agricultural irrigation. Research on the law and process of irrigation and drainage is one of the effective ways to improve the efficiency of agricultural water resources utilization. At present, the research on the irrigation and drainage process mostly uses the establishment of distributed hydrological models of irrigation areas to simulate and analyze the hydrological cycle process of irrigation areas. Hydrological model is an important method to study the process of watershed or regional hydrological cycle. Through the model, the physical process of water movement is described, and the interaction between rainfall, evapotranspiration, slope flow, river channel flow, underground runoff and...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problem of errors in the simulation and prediction of the irrigation and drainage process only through the hydrological model, and proposes a method for the simulation and prediction of the irrigation and drainage process

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