Temporal and spatial variability response of groundwater level to land use/land cover change in oases of arid areas  

作　　者：YAN Jinfeng CHEN Xi LUO Geping GUO Quanjun 

机构地区：[1]Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China [2]Graduate School, Chinese Academy of Sciences, Beijing 100039, China [3]Yijian Hydro-geology Engineering Corporation of XPCC, Urumqi 830009, China

出　　处：《Chinese Science Bulletin》2006年第A01期51-59,共9页

摘　　要：这份报纸由使用地理信息系统(GIS ) 在 Sangong 河分水岭在干旱绿洲在地下水水平的时间、空间的可变性上在陆地使用 / 盖住变化(LUCC ) 的影响上进行案例研究，遥感(RS ) 和 geostatistical 方法。在在 1978， 1987 和 1998 的分水岭的地下水水平的时间、空间的可变性是由使用 semivariogram 模型和 Kriging 插值的 regressed。在 1978 从天线图象导出的 LUCC 分类地图，在 1987 的 Landsat TM 图象和在 1998 的 Landsat ETM 图象被用来迭加并且与地下水深度的不同等值线图在这些区域分析 LUCC 类型的变换关系。结果证明地下水的变化再装不在整个绿洲是那么重要的，但是时间、空间的 LUCC 在从 1978 ～ 1998 的 20 年的时期期间在正常流动时期或在高流动时期是重要的，并且在他们之间有靠近的关联。通常有地下水水平(33.4%) 的中等空间关联，并且空间自相关距离是 17.78 km。地下水水平严厉地被改变的区域也是陆地资源逐渐地被利用的区域，它主要包括农田，树林，和大楼的利用，工业并且采矿陆地。学习表明 LUCC 强烈在干旱绿洲影响地下水水平的时间、空间的可变性。学习结果具有为讲道理地利用浅地下水资源并且维持干旱绿洲的稳定性的直接、实际的意义。This paper conducts a case study on the impacts of land use/cover change （LUCC） on the temporal and spatial variability of the groundwater level in an arid oasis in the Sangong River Watershed by using the geographical information system （GIS）, remote sensing （RS） and geostatistical methods. The temporal and spatial variability of the groundwater level in the watershed in 1978, 1987 and 1998 is regressed by using the＇semivariogram model and Kriging interpolation. The LUCC classification maps derived from the aerial images in 1978, Landsat TM image in 1987 and Landsat ETM image in 1998 are used to superpose and analyze the conversion relationship of LUCC types in the regions with different isograms of the groundwater depth. The results show that the change of groundwater recharge was not so significant in the whole oasis, but the temporal and spatial LUCC was significant either in the normal flow periods or in the high flow periods during the 20-year period from 1978 to 1998, and there was a close correlation between them. There is generally a moderate spatial correlation of groundwater level （33.4%） and the spatial autocorrelation distance is 17.78 km. The regions where the groundwater level is sharply changed are also the regions where the land resources are increasingly exploited, which include mainly the exploitation of farmlands, woodlands, and building, industrial and mining lands. The study reveals that the LUCC affects strongly the temporal and spatial variability of the groundwater level in the arid oasis. The study results are of direct and practical significance for rationally utilizing shallow groundwater resources and maintaining the stability of the arid oasis.

关 键 词：LUCC 地下水位 水资源 半方差图 克里格法 

分 类 号：P641[天文地球—地质矿产勘探]