Method and system for hydrological simulation of shrimp-rice co-cropping area based on SWAT improved model

Abstract

Disclosed are a method and system for hydrological simulation of a shrimp-rice co-cropping area based on SWAT improved model. Hydrological simulation can be rapidly and accurately carried out on the prawn and rice co-culture area, and reliable guarantee is provided for scientific and reasonable implementation of prawn and rice co-culture water resources allocation and regional flood control and drainage. The method comprises the following steps: step I, improving a pot hole module configuration of an SWAT model, and setting and improving a cone in an original SWAT model into a shrimp-rice co-cropping area structure with rectangular shrimp ditches on the periphery and a rice field in the middle; setting an improved calculation method for the effective water storage area of the shrimp-rice co-cropping area; step II, improving an evapotranspiration algorithm; step III, improving an infiltration amount algorithm; step IV, constructing an irrigation module; step V, constructing a drainage module; and VI, making hydrological simulation: inputting parameter data required by the model based on actual measurement data and simulation requirements of a to-be-simulated region, then operating the model, and carrying out hydrological simulation under shrimp-rice co-culture.

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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