集约化农业生产区浅层地下水埋深的时空变异规律  

Spatiotemporal variation of shallow groundwater depth in intensive agricultural areas

作　　者：李新波[1] 郝晋珉[1] 胡克林[1] 路鹏[2] 牛灵安[1] 

机构地区：[1]中国农业大学资源与环境学院,北京100094 [2]中科院遥感应用研究所,北京100101

出　　处：《农业工程学报》2008年第4期95-98,共4页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家科技攻关计划(2004BA50801);长江学者和创新团队发展计划(IRT0412)资助

摘　　要：揭示区域地下水埋深的时空变异规律,可为地下水资源评价和管理提供科学依据。通过收集和实测河北南部平原—曲周县1990和1999年两个时期地下水埋深的资料,应用地统计学方法对其进行了分析。结果表明,两个时期地下水的平均埋深分别为4.64m和9.81m,它们的空间相关距离分别为13.6km和10.4km,呈递减趋势。由于该区地形地貌和种植业布局的转变,导致了地下水埋深空间分布呈南深北浅的趋势。从1990年到1999年,地下水埋深具体变化为>9.81m的区域从无增加到324.0km2,<4.6m的区域从281.8km2减少至15.3km2。地下水大量开采和种植业布局的转变是该区地下水位下降的主要原因。Revealing the spatiotemporal variation characteristics of shallow groundwater depth （GWD） can provide scientific basis for evaluating and managing groundwater resources. The data for groundwater depth in 1990 and 1999 at Quzhou County, Hebei province were measured in situ and obtained from history data. Descriptive statistics and geostatistics were used to analyze the data. The results indicated that average groundwater depth in 1990 and 1999 were 4.64 m and 9.81 m, respectively. The semi-variation analysis showed that their spatial correlation distances in 1990 and 1999 were 13.6 km and 10.4 km, respectively, which showed a descending trend. The increasing trend of GWD from north to south across the county was caused by the change of topography and land use types in this region. During the past 10 years, the area where GWD was higher than 9.81 m increased from 0 to 323.99 km^2, while the area where GWD was lower than 4.64 m decreased from 281.8 km^2 to 15.33 km^2. The main factors affecting GWD descending trend were land use change and overdraw of groundwater by farmers in this area.

关 键 词：集约化农区 地下水埋深 地统计学 时空变异 

分 类 号：S273.4[农业科学—农业水土工程]