Quantifying the effects of irrigation schedule on groundwater level variability using a linked APSIM-MODFLOW model framework

作者：Xia Liu, Zongzheng Yan, Yanjun Shen, Yanjun Shen, Leilei Min, Shiqin Wang, Yanjun Shen, Yanjun Shen, Ying Guo · 发表于：Agricultural Water Management · 年份：2025 · DOI：10.1016/j.agwat.2025.109610 · 被引用次数：6 · 研究领域：Hydrology and Watershed Management Studies、Water resources management and optimization、Water-Energy-Food Nexus Studies

Efforts to slow down groundwater depletion requires reliable estimates of the impacts of irrigation on shallow groundwater levels. However, spatial assessment of the effects of irrigation schedule on groundwater level change is still lacking. Here, we present a linked APSIM-MODDLOW model framework to reveal irrigation-groundwater linkages in the plain area of Ziyahe River Basin by considering irrigation schedules, crop yield, ETa and leakage. The linked APSIM-MODLFOW model effectively simulates grain yield and regional groundwater level fluctuations in the winter wheat-summer maize cropping system of the NCP. We found that the simulated grain yield and evapotranspiration increase rapidly with the increase of irrigation frequency, whereas the yield exhibits a gradual increase when irrigation exceeds three times (70 mm each time). The simulated regional average groundwater levels exhibit an increase under rain-fed and single-irrigation scenarios-with irrigation applied at the jointing stage of wheat-whereas a decline is observed under alternative irrigation regimes. These findings indicate that regional groundwater can be replenished through recharge when irrigation schedules range from single-irrigation (applied at the jointing stage of wheat) to double-irrigation (applied at both the jointing stage and the flowering and grain-filling stage of wheat) The unconfined aquifer maintains extraction-recharge equilibrium under the irrigation amount 70 – 140 mm (1-irrigation to 2-irri...