基于地统计学的泾惠渠灌区地下水位时空变异性研究  

Spatio-temporal Variability of Groundwater Table in Jinghui Irrigation District Based on Geostatistics

作　　者：邓康婕 魏晓妹[1] 降亚楠[1] 李建承 

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《灌溉排水学报》2015年第3期75-80,共6页Journal of Irrigation and Drainage

基　　金：水利部公益性行业科研专项(201301016);国家科技支撑计划项目(2012BAD08B01);陕西省水利科技计划项目(2011-07)

摘　　要：根据泾惠渠灌区43眼长期观测井2002、2004、2007年和2009年地下水埋深资料,利用趋势分析法和ArcGIS地统计分析模块,研究了灌区地下水埋深时空分布规律及变异特性。结果表明,地下水埋深样本服从对数正态分布,球状模型拟合变异函数的效果较好。灌区地下水埋深样本存在几何各向异性,并略有增强趋势。地下水埋深样本具有中等的空间相关性,是结构性因素和随机性因素共同作用的结果。灌区地下水埋深从西北向东南逐渐变浅。灌区地下水埋深年内呈双峰曲线变化,最小埋深值出现在春灌期,最大埋深值出现在夏灌期;灌区地下水埋深年际呈减小趋势,具有浅埋区面积明显增大、深埋区面积不明显增大的特征。Based on the groundwater table data of 43 observation wells in 2002,2004,2007 and 2009in the Jinghui irrigation district,the trend analysis and geostatistics of ArcGIS software were used to research the spatial distribution and spatial-temporal variability of the groundwater table.The results showed that the groundwater table distribution fitted the log-normal variogram.Spherical model fitted variogram better through the comparison of different models.The sample of groundwater table existed geometric anisotropy and had an enhancing tendency.The sample of groundwater table had medium spatial correlation,which was the joint action of structural factors and random factors.The groundwater depth decreased gradually from northwest to southeast in space.Its annual changes was bimodal with the different irrigation seasons.The minimum groundwater depth appeared in spring irrigation period and the maximum appeared in summer irrigation period.The groundwater depth showed a trend of decreasing in inter-annual variability.The shallow area increased significantly and the deep area increased unobviously.

关 键 词：泾惠渠灌区 地统计学 ARCGIS 地下水埋深 时空变异 

分 类 号：P641.7[天文地球—地质矿产勘探] P628.2[天文地球—地质学]