Hydrological simulation method and system for shrimp and rice co-cropping area based on swat improved model

Abstract

The present invention provides a hydrological simulation method and system for a shrimp-rice co-cropping area based on the improved SWAT model, which can quickly and accurately perform hydrological simulation on the shrimp-rice co-cropping area, and provide scientific and rational implementation of shrimp-rice co-cropping water resource allocation and regional flood control and drainage Provided a reliable guarantee. The method includes: step I. improving the pothole module configuration of the SWAT model, improving the cone setting in the original SWAT model to a shrimp-rice co-cropping area structure with a rectangular shrimp ditch in the middle of the paddy field; and setting the improved Calculation method of effective water storage area in shrimp-rice co-cropping area; Step II. Improvement of evapotranspiration algorithm; Step III. Improvement of infiltration amount algorithm; Step IV. Construction of irrigation module; Step V. Construction of drainage module; Step VI .Hydrological simulation: Based on the measured data and simulation requirements of the area to be simulated, input the parameter data required by the model, and then run the model to perform hydrological simulation under the co-cropping of shrimp and rice.

Description

technical field [0001] The invention belongs to the field of computing systems based on a specific computing model, and in particular relates to a hydrological simulation method and system for a shrimp-rice co-production area based on an improved SWAT model. Background technique [0002] The co-cropping model of shrimp and rice has significantly improved the socio-economic and ecological benefits in rural areas. Since farmers in Qianjiang City, Hubei Province explored the continuous cropping model of shrimp and rice in 2000, the model of shrimp and rice breeding has rapidly spread to 21 provinces including Hubei, Anhui, Hunan, Jiangsu, Jiangxi, and Henan. As of 2018, the area of ​​my country's shrimp and rice breeding model reached 840,000 hectares. Shrimp-rice co-production solves the spatio-temporal conflict between crayfish farming and rice planting, and has significant advantages in terms of economic and ecological benefits. Shrimp-rice co-cropping is 3 to 4 times more ...

AI Technical Summary

Problems solved by technology

[0003] However, the co-cropping of shrimp and rice significantly changed the characteristics of field water demand and its requirements for irrigation and drainage, and had a significant impact on the underlying surface conditions and water use process of regional rainfall and runoff production.

At present, the hydrological model is basically developed for natural watersheds, and is not suitable for the simulation of water conversion in irrigation areas strongly affected by human activities, let alone the water simulation in shrimp-rice co-cropping areas

Water balance elements and water cycle processes can be observed through experiments at the field scale, but at the regional scale, it will inevitably consume a lot of time, manpower and material resources if the experimental observation method is used, and sometimes the relevant water balance elements cannot be obtained limited by existing observation methods

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