不同节水条件对河套灌区典型灌域水盐动态的影响

• Published in: Guanʻgai paishui xuebao Vol. 44; no. 6; p. 72
• Main Authors: MI Boyu, JIA Zhijun, CHEN Haorui, CHANG, Xiaomin, WANG Huailiang, WANG, Shaoli, GUAN Xiaoyan, LIU, Yong
• Format: Journal Article
• Language: Chinese
• Published: Xinxiang City Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage 01.06.2025
• Subjects: Accumulation; Canal linings; Canals; Crops; Desalination; Dynamics; Evapotranspiration; Groundwater; Groundwater levels; Groundwater recharge; Irrigation; Irrigation districts; Irrigation practices; Irrigation water; Leaching; Moisture content; Salinity; Salinity effects; Salts; Soil profiles; Soil properties; Soil salinity; Soil water; Surface water; Transition zone; Water conservation; Water consumption; Water table

【目的】探究不同节水措施与强度对河套灌区典型灌域水盐动态的影响，为节水灌溉条件下的灌区水盐精准调控提供理论依据。【方法】以河套灌区沙壕渠分干灌域为研究区，构建水盐运移耦合模型，利用2018年和2019年实测数据进行模型率定和验证，设置基准方案和6种节水措施与强度的情景方案，分析其对地下水位、土壤盐分累积及作物腾发量的影响。【结果】减少灌溉定额导致地下水位显著下降并加剧盐分累积，渠道衬砌在节水的同时增加排盐量，井渠结合方案因使用微咸地下水灌溉，导致最终积盐量显著增加。地下水位降幅与节水强度呈显著线性关系，节水比例每增加10%（34.5 mm），地下水位降幅增加0.183 m。0~1 m土层可分为...