自然资源学报

自然资源学报 ›› 2004, Vol. 19 ›› Issue (5): 577-584.doi: 10.11849/zrzyxb.2004.05.005

• 资源保护与利用 • 上一篇    下一篇

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

陈海1,2,3, 康慕谊1,2   

  1. 1. 北京师范大学资源学院,北京100875;
    2. 北京师范大学中国生态资产评估研究中心,北京100875;
    3. 西北大学城市与资源学系,陕西西安710069
  • 收稿日期:2004-04-06 修回日期:2004-05-19 出版日期:2004-10-25 发布日期:2004-10-25
  • 通讯作者: 康慕谊，E-mail:kangmy@bnn.edn.cn E-mail:E-mail:kangmy@bnn.edn.cn
  • 作者简介:陈海(1971～），男，山西太原人，博士生，讲师，主要从事区域资源合理利用与开发力而的研究.
  • 基金资助:

    国家重点基础研究发展规划(973(项目)G2000018607)资助。

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

CHEN Hai1,2,3, KANG Mu-yi1,2   

  1. 1. College of Resources Science and Technology, Beijing Normal University, Beijing 100875,China;
    2. China Ecological Capital Assessment and Research Center at Beijing Normal University, Beijing 100875,China;
    3. Department of Urban and Resources Sciences, Northwest University, Xi'an 710069,China
  • Received:2004-04-06 Revised:2004-05-19 Online:2004-10-25 Published:2004-10-25

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摘要： 在北方农牧交错带植被重建中适宜乔、灌、草种生态区划的基础上,以该区域黄土高原区作为研究区,结合该区1989和1999两年的土地利用分类图,通过计算区域缺水指数及对其分级,探讨了缺水指数在时间和空间上的变化规律,分析了耕地、林地、草地等该区主要土地利用类型在时间和空间上与缺水指数的关系。在此基础上,构建水分亏缺风险指数(RiskIndexofWaterDeficit),从研究区整体和各生态分区两个尺度上探讨了不同土地利用类型的RIWD时空分异。得出如下结论:①1989～2000年,研究区缺水指数均在中度以上,其变化幅度有逐年减少的趋势;②对比1989年和1999年两年的缺水指数,区域整体缺水状况有所缓解,但各生态分区内的缓解程度在空间上仍存在差异;③从研究区整体而言,各土地利用类型的水分亏缺风险指数逐渐减少,依次为林地、耕地、草地;④因各生态分区内的地理特征包括水分状况存在变化,故各土地利用类型的水分亏缺风险程度排列顺序与区域整体有所不同。

关键词: 缺水指数, 水分亏缺风险指数, 土地利用类型, 黄土高原区, 农牧交错带

Abstract: 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.

Key words: Risk Index of Water Deficit(RIWD), land use and cover type, the Loess Plateau Region, Regional Water Stress Index(RWSI), the farming-pastoral zone in northern China