XDA28100105 - Paper - Matching and Regulation Technology of Water and Land Resources in the Sanjiang Plain

Differing water interests between regional managers and farmers, along with poor WFE coordination, have impeded large-scale sustainability. To address this, we developed a multi-objective programming model at dual scales (regional and farm) that considers the feedback between water and arable land resources.

The model was applied to a major irrigation region in Northeast China, which has seen substantial cropland expansion and groundwater depletion. Results show that the dual-scale model can link sustainability with water use (equilibrium amount of groundwater), food production (economic benefits of agricultural systems), and ecosystem integrity (satisfaction of wetland ecological water use). Changes in water supply and demand under different scenarios affect the total arable land area and the structure of crop cultivation.