Subarea optimization method for crop irrigation system in underground water shallow-buried area

Abstract

The invention discloses a subarea optimization method for a crop irrigation system in an underground water shallow-buried area. The method comprises the steps of obtaining local historical data; based on the local historical data, utilizing an Aquacrop model to obtain first simulation yield and simulation water consumption of each growth stage of crop wheat in different areas under different set irrigation systems, wherein different areas take set groundwater burial depths as partition boundaries; according to all the first simulated yields and the simulated water consumption of the corresponding growth stages, acquiring second simulated yields of all the regional crops under the water production function models and stage sensitivity coefficients or indexes of the different growth stages by adopting the set multiple water production function models; calculating a decision coefficient between the first simulated yield and the second simulated yield; determining an optimal moisture production function model corresponding to each region by adopting a phase sensitive coefficient or an index and a decision coefficient; and taking the stage sensitive coefficient or index under the optimal moisture production function model as an irrigation decision variable, and obtaining an irrigation system by using Aquacrop in combination with a set irrigation quota.

Description

technical field [0001] The invention relates to the field of agriculture, in particular to a partition optimization method for crop irrigation systems in shallow groundwater buried areas. Background technique [0002] Shallow groundwater buried areas include the Hetao Irrigation Area, the Northwest Shandong Plain, the Jianghan Plain, the Yellow River Delta, and the Yellow River Diversion Irrigation Area in the Yinchuan Plain. [0003] In shallow groundwater burial areas, groundwater recharges the vadose zone soil through capillary rise and transforms into soil water that can be used by crops. The degree of interaction between soil water and groundwater varies with groundwater burial depth. In areas with large spatial variations in groundwater depth in shallow groundwater burial areas, crop irrigation measures are mostly obtained from field experiments under groundwater level conditions at test sites in specific years, and there are great limitations in the promotion and appl...

AI Technical Summary

Problems solved by technology

In areas with large spatial variations in groundwater depth in shallow groundwater burial areas, crop irrigation measures are mostly obtained from field experiments under groundwater level conditions at test sites in specific years, and there are great limitations in the promotion and application of relevant results

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