论文部分内容阅读
石津灌区地下淡水区以井灌为主,地下水咸水、微咸水区以渠水灌溉为主,近50年来,地下水埋深发生了不同的变化特征,井灌区地下水位埋深持续下降,由20世纪50年代的普遍小于4m下降到目前的15～36m;而渠灌区地下水位埋深常年在地下水强蒸发带区间波动,以蒸发排泄为主,由此提出了渠水和地下咸水、微咸水混合灌溉增加农灌水源的措施,并计算了混合后矿化度为1g/L、1.5g/L、2g/L、2.5g/L、和3g/L时,可增加的农灌开采的地下咸水微咸水资源量为2472.6×104～21872.4×104m3。
The underground freshwater area in Shijin Irrigation District is dominated by well irrigation. The groundwater is brackish and brackish water is dominated by canal water. In the recent 50 years, the underground water depth has different characteristics. The depth of groundwater table in the well irrigated area continues to decrease from 20 In the 1950s, generally less than 4m dropped to the current 15 ~ 36m; while the underground water table in the drainage irrigation area fluctuated in the period of strong groundwater evaporation zone, mainly evaporative emission, thus proposed drainage and underground salt water, slightly salty Water mixed irrigation to increase the irrigation source irrigation measures, and calculate the mixed salinity of 1g / L, 1.5g / L, 2g / L, 2.5g / L, and 3g / L, The quantity of brackish water in groundwater is 2472.6 × 104 ~ 21872.4 × 104m3.