宁夏平罗县井渠结合灌区地下水盐运移规律研究

发布时间：2018-06-14 23:46

本文选题：井渠结合灌区 + 地下水　；参考：《水利水电技术》2017年03期

【摘要】：以综合治理井渠结合灌区土壤盐碱化为目标,针对宁夏平罗县井渠结合灌区下游灌水难、排水难和盐碱化严重等问题,采用渠灌井排、井沟联合使用等措施,对作物进行适量和适时灌溉,充分利用地下水资源,并监测井渠结合灌溉条件下田间土壤含盐量、地下水矿化度和水位埋深的变化情况,分析地下水埋深和矿化度对土壤含盐量的影响。结果表明:井渠结合灌溉对降低地下水位效果显著。以黄河水为主要灌溉水源的宁夏银北自流灌区,地下水矿化度变化幅度较小;灌溉后的土壤表层含盐量骤降,0~40 cm土层的盐分变化较大;土壤盐分与地下水矿化度具有较强的线性正相关性,与地下水埋深呈负相关。研究成果对干旱半干旱区灌区水资源优化配置、盐碱地改良具有参考价值。
[Abstract]:Aiming at the aim of comprehensive treatment of soil salinization in well and canal combined irrigation area in Pingluo County, Ningxia, aiming at the problems of difficult irrigation, difficult drainage and serious salinization in the lower reaches of well and canal combined irrigation area in Pingluo County of Ningxia, the measures such as canal irrigation and well drainage and combined use of well and ditch are adopted. Proper and timely irrigation of crops, making full use of groundwater resources, and monitoring the changes of soil salinity, groundwater salinity and water table depth in the field under the condition of well and canal irrigation combined with irrigation, The effects of groundwater depth and salinity on soil salinity were analyzed. The results show that the well-canal combined irrigation has remarkable effect on lowering groundwater level. The variation of groundwater salinity in Yinbei Artesian Irrigation area of Ningxia with Yellow River water as the main irrigation water source is relatively small, and the salt content in the surface layer of the irrigated soil decreases sharply in the soil layer of 40 cm. There is a strong linear positive correlation between soil salinity and groundwater salinity, and a negative correlation between soil salinity and groundwater depth. The research results have reference value for the optimal allocation of water resources and the improvement of saline-alkali land in arid and semi-arid irrigated areas.
【作者单位】：宁夏回族自治区水利科学研究院;
【基金】：水利部世行节水灌溉项目“宁夏回族自治区平罗县土壤盐碱化综合治理措施应用研究与推广”(NXPLS1200)
【分类号】：S27;S156.4

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