宁夏引黄灌区地下水三维非均质模拟与预测OA

This study aims to analyze the dynamic changes in groundwater levels within the Ningxia Yellow River Irrigation District.By integrating hydrogeological and engineering geological survey data,it precisely characterized the geological heterogeneity of the study area and developed a three-dimensional heterogeneous transient groundwater flow model.Using numerical simulation methods,it forecast groundwater dynamics in the irrigation district.The results indicate that the constructed three-dimensional heterogeneous transient groundwater flow model accurately reflects the dynamic changes in groundwater within the irrigation district.Projections suggest a continued rise in groundwater levels,necessitating corresponding management measures to ensure safety for both residential and agricultural activities.The Baoditan village area exhibits poor soil permeability,rendering it one of the most severely affected regions by groundwater issues,with water table depths ranging from 0.3 to 0.8 m.It proposed various management strategies to address the existing groundwater level challenges.The high-efficiency water-saving strategy resulted in the most significant decrease in groundwater levels,followed by the channel interception strategy,with average groundwater level decline rate of 0.35 and 0.18 m/a,respectively.Considering both effectiveness and practical feasibility,the channel interception strategy is identified as the optimal solution for effectively mitigating groundwater hazards in the irrigation district.