%0 Journal Article
%T Risk of water deficit related to land-use type-A case study in the Loess Plateau Region of the farming-pastoral zone in northern China<br>土地利用类型与水分亏缺的风险程度关系--以北方农牧交错带黄土高原区为例
%A CHEN Hai
%A KANG Mu-yi
%A <br>陈海
%A 康慕谊
%J 自然资源学报
%D 2004
%I 
%X The Loess Plateau Region of the farming-pastoral zone in northern China is considered as an ecologically sensitive area due to its special landscape pattern and varied regional water reg-imes.Based on the ecological regionalization of suitable trees,shrubs and herbages for vegetation restoration in the farming-pastoral zone of northern China,this paper firstly graded the spatial and temporal variations of water regimes through calculating the Regional Water Stress Index (RWSI) from 1989 to 2000.Meanwhile,combining with the classification map of land use and cover type in the Region,the paper then mainly analyzed the relationship between the spatial and temporal variations of water regimes and the different land use and cover types,through setting up an index RIWD(Risk Index of Water Deficit)concerning agricultural,pastoral and forestry production in the whole Region and within its each ecological sub-region.The results of the analyses show that:(1)from 1989 to 2000,the water deficit in the Region existed over time, though the variation range of the RWSI of the study area was diminishing;(2)comparing the RWSI of 1999 with that of 1989,the water deficit of the whole study area was abated a little,yet there were spatial variati-ons within every ecological sub-region,which meant in some places the water deficit was still serious;(3)for the whole study area,the order of RIWD for every main land use type,from high to low,was woodland,arable land and grassland,implying its conditions favorable for pastoral practices;and (4)because of the spatial and temporal variations of the water regimes caused by t-he complicated geographical features in the Region,the RIWD was obviously different and the sequence of it varied somewhat among the ecological sub-regions.
%K Regional Water Stress Index(RWSI)
%K Risk Index of Water Deficit(RIWD)
%K land use and cover type
%K the Loess Plateau Region
%K the farming-pastoral zone in northern China<br>缺水指数
%K 水分亏缺风险指数
%K 土地利用类型
%K 黄土高原区
%K 农牧交错带
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=4DCB9A3AF3395AF0101DE5302EF3C300&aid=AEC29F341E33A382&yid=D0E58B75BFD8E51C&vid=2A8D03AD8076A2E3&iid=94C357A881DFC066&sid=52B9DFFFCC2EB041&eid=E04FC1B5BC47587B&journal_id=1000-3037&journal_name=自然资源学报&referenced_num=0&reference_num=12