XU Yi-he,WEI Xiao-mei,CAI Ming-ke,et al.Geostatistics-based Study of Spatial Variability of Groundwater Level in Baoji Urban Area[J].Research of Soil and Water Conservation,2011,18(01):210-214.
基于地统计学的宝鸡市区地下水位空间变异特征研究
- Title:
- Geostatistics-based Study of Spatial Variability of Groundwater Level in Baoji Urban Area
- 分类号:
- P641
- 摘要:
- 借助地理信息系统软件（ArcGIS），从宝鸡市DEM数据中提取面积约100 km2的研究区图层，选取24眼监测井1990年、1995年、2000年和2004年的地下水位水位数据为样本资料，应用地统计学方法对市区地下水位进行了趋势分析、空间变异分析以及空间插值研究。结果表明，在单个年份中，市区地下水位在南北方向上存在明显的“U”型趋势，东西方向上的趋势变化稍显平稳；地下水位具有中等的空间相关性，在800 m以下尺度上的短距离变异所占比重较大，各年份地下水的空间连续性差，空间自相关距离较短，异性比从1990年的0.713减小到2004年的0.171，说明市区地下水位空间各向异性逐渐增强；球状模型交叉验证表明模型拟合效果良好，空间插值结果显示，研究区不同地方的地下水位年际变幅较大，且空间分布变化明显，主要受开采强度时空变化的影响。
- Abstract:
- Using geographic information system software (ArcGIS), extracting a layer of the study area about 100 km2 from the DEM data of Baoji city, selecting the groundwater level data of 24 monitoring wells in the year of 1990,1995,2000 and 2004 as the sample data, this paper made a research on the trend analysis, spatial variation analysis and spatial interpolation of the urban area groundwater level with geostatistics. The results showed that there was a clear ‘U’type trend in the north-south direction for the urban groundwater level, while the trend was not obvious in the east-west direction each year. Groundwater level was of moderate spatial correlation, more variation ingredients of the following scales in the 800 m short-range, poor spatial continuity each year and of short distance spatial autocorrelation. Anisotropy decreased from 0.713 in 1990 to 0.171 in 2004, which indicated a gradual increase of urban groundwater level spatial anisotropy. The cross validation of the spherical model turned to be good and the spatial interpolation showed that groundwater level and spatial distribution changed significantly between years in different parts of the study area as a result of the spatial-temporal exploitation intensity
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备注/Memo
收稿日期:2010-9-2;改回日期:2010-9-17。
基金项目:国家自然科学基金项目（50879071）
作者简介:许义和（1985- ），男，在读研究生，研究方向为水资源转化与调控。E-mail：xuyihe258815@126.com
通讯作者:魏晓妹（1957- ），女，教授，博导，主要从事水文水资源教学与科研工作。E-mail：weixiaomei@163.com