摘要
选取额济纳三角洲14口自动观测井日尺度的地下水位埋深观测值(2010.4-2011.4)作为数据基础,运用SPSS 18.0软件中的描述性分析,趋势分析和K-means聚类分析模块,对额济纳三角洲地下水位年内动态变化特征进行了分类分析。结果表明:研究区地下水位年内动态变化空间上存在着较大的差异性,其地下水位动态可分为四种波动类型。其中,类型Ⅰ主要分布在远离河道的荒漠地带,地下水位动态变化较为稳定;类型Ⅱ的观测井靠近东西河,地下水与河水不断的发生交换,多次的抬升下降是该类型地下水位动态变化的典型特征。类型Ⅲ主要分布于东河下游绿洲区,地下水位动态变化主要受人为调控的地表径流影响,地下水位剧升后缓慢下降是该波动类型的典型特征;类型Ⅳ分布在远离河道的绿洲区周边地带,其地下水位动态变化呈显著的下降趋势,地下水位缓慢下降是此波动类型的典型特征,这与地下水不断以蒸散发形式排泄,且得不到补给有关。
In this paper,the groundwater depth dynamic in a year in Ejina Delta was analyzed based on groundwater depth monitoring data（2010.4-2011.4） on one day intervals in 14 monitoring wells in Ejina Delta with descriptive statistical analysis,one variant linear regression direct analysis and K-means cluster analysis in SPSS18.0.The results showed that the groundwater depth dynamic had significant spatial heterogeneity in Ejina Delta,and could be divided into four fluctuation types.TypeⅠmainly occurred in the desert zone being remote from river.Groundwater table had weakly fluctuated but not significantly changed;typeⅡmainly occurred in riparian zone where groundwater and surface water continuously exchanged.Frequent lifting and decline of groundwater table was typical characteristics of the fluctuation type;type Ⅲ mainly occurred in the oasis zone located in the lower reaches of the Donghe River.The dynamic change of groundwater table was affected by human activities.Rapid lifting and slow decline of groundwater table was the typical characteristics of the fluctuation type;type Ⅳ mainly occurred in oasis surrounding area where was far from river.Groundwater table had been continuously declining in the study period.Constant and slow decline of groundwater table was the typical characteristics of the fluctuation type,which was related to groundwater with constant evapotranspiration and without recharge.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2013年第4期135-140,共6页
Journal of Arid Land Resources and Environment
基金
国家重点基础研究发展计划项目(2009CB-421305)
国家自然科学基金重大研究计划培育项目(91025023)资助
