河西走廊地下水位的趋势性与持续性分析--以黑河干流中游地区为例

Tendency and persistence of groundwater level in the Hexi corridor area——An example in the middle reaches of Heihe River main stream area

依据河西走廊黑河干流中游地区地下水位观测点时间序列观测资料,利用Kendall秩次相关和Hurst指数分别分析了53个观测点1985-2007年地下水位的趋势性和持续性特征。结果表明：河西走廊戈壁带和绿洲区地下水位的趋势性和持续性各不相同,地下水位的年均值与月均值都通过了显著性检验,呈下降趋势,且戈壁带下降幅度大于绿洲区,并具有一定持续性。

Groundwater level have characteristics of tendency and persistence. Ten Kendall analysis and Hurst index were applied to analyze the characteristics of tendency of groundwater level in the 53 observation points in the middle reaches of Heihe River main stream area in the Hexi corridor area during 1985 -2007. The results showed there had different tendency and persistence of groundwater level of gobi area and oasis area in the Hexi corridor area, the year average data and month average data all passed the significance test not only showing a continuous decline trend, but also persistence to a certain extent.