干旱引黄灌区地下水位变化特征分析

Changing Characteristics of Groundwater Level of the Yellow River Irrigation Area in Arid Region

为研究干旱引黄灌区不同地下水运动带的地下水位变化特征,以甘肃省景电一期灌区为例,利用其1982—2011年实测地下水位数据,采用Mann—Kendall趋势检验法分析了地下水位的年际变化趋势,并根据每15 a逐月的地下水位均值曲线,对地下水位的年内变化特征进行了研究。结果表明:受季节性灌溉、区域地势、人为开采等因素的影响,不同地下水运动带地下水位年际、年内变化趋势存在较大差异;在灌区汇水区域适当发展井灌,有利于土地盐渍化的控制。

In order to study the changing characteristics of groundwater River irrigation area, the stage I project of Jingtaichuan electrical lifting selected as the typical representative and the basic data was the real-time level of different groundwater movement zones in the arid Yellow irrigation area in Gansu Province （hereinafter called as ＂JID＂ ） was The inter-annual variation trend of groundwater level was analyzed based monitoring data of groundwater level in this area from 1982 to 2011. on Mann-Kendall test and the intra-annual variation was analyzed through the comparison of groundwater level monthly average curve of every regional terrain and artificial exploitation, the inter-annual and intra-annual 15 years. The results show that account for the seasonal irrigation, variation of different groundwater movement zones in the irrigation area has obvious difference; exploiting groundwater in groundwater accumulation zone for irrigation can effectively control the local salinization of the irrigation area.