A Calculation Method of Water Resources Consumption in Grassland Irrigated Land

Abstract

The invention discloses a method for calculating the consumption of water resources in grassland irrigated land, which uses the stable and gradual change characteristics of the reference crop coefficient in the grassland area on the time scale, and expands the ET long sequence of the equivalent decomposition area, and uses the improved reference crop coefficient method to couple The regional reference crop evapotranspiration realizes the expansion of the long sequence of evapotranspiration in the grassland region under the absence of remote sensing images, especially under the interference of non-sunny days, and solves the difficult problem of ET calculation in the remote sensing region, and improves the accuracy of the long sequence calculation of evapotranspiration in the grassland region. Aiming at the calculation problem of water resource consumption in grassland irrigated land, the present invention quantifies and determines the GW value of water resource consumption in crop growing season in irrigated grassland area through the calculation model of water resource consumption in grassland area, and defines the real-time monitoring and management of groundwater resources in grassland area It provides a typical case analysis reference for the development and utilization management of groundwater resources in grassland areas and grassland ecosystem research.

Description

technical field [0001] The invention belongs to the field of water resource management and water monitoring in pastoral areas, and in particular relates to a calculation method for water resource consumption in grassland irrigated land. Background technique [0002] For grassland areas with relatively fragile ecological structures, irrigation will not only increase the yield of forage and food crops, improve the disaster resistance and livestock protection capacity of pastoral areas and the carrying capacity of grasslands, but also change the water cycle process of grassland ecosystems, making them appear "natural- society” duality. At the same time, grasslands will consume local water resources and directly affect ecological environment changes. Reasonable calculation of water consumption in irrigated land plays a decisive role in grassland ecosystems and economic and social stability in pastoral areas. [0003] In the process of calculating the water consumption of grassl...

AI Technical Summary

Problems solved by technology

Existing methods such as constant evaporation ratio method, sinusoidal curve method, canopy resistance method, constant reference crop coefficient method, etc., are used to carry out time-scale long-sequence expansion, using two regional ET remote sensing calculation results, and by interpolating the missing regional ET of remote sensing images, In addition to subjectively weakening the interference of changes in surface temperature and soil moisture on ET, it is easier to weaken the influence of meteorological parameter changes caused by weather, especially non-sunny days, and ignore the gradual change caused by vegetation growth on the underlying surface. The accuracy of long-sequence ET results obtained by changing vegetation parameters cannot be guaranteed, and it is difficult to effectively control the convergence and dispersion of errors, which seriously affects the calculation results and accuracy

Images