JOURNAL OF NATURAL RESOURCES ›› 2013, Vol. 28 ›› Issue (3): 437-449.doi: 10.11849/zrzyxb.2013.03.009

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Land Use Change Induced Land and Water Resources Balance——A Case Study on the Xiliaohe Watershed

YANG Yan-zhao1, ZHANG Wei-ke2,1, FENG Zhi-ming1, LIU Dong3   

  1. 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. Handan College, Handan 056005, China;
    3. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2012-02-03 Revised:2012-06-15 Online:2013-03-20 Published:2013-03-20

Abstract:

As the intersection area and transitional zone of agriculture and animal husbandry, farming-pastoral zone of northern China is the important ecological barrier for east and central China. In recent years, so many land and water resources have been developed and used that the ecological environment was deteriorated. Land desertification, salinization and other ecological and environmental problems become increasingly severe. For investigating the matching degree of regional land and water resources and promoting sustainable utilization of them, this paper performed a study on land use and water balance over the farming-pastoral zone of northern China during the period from 1995 to 2005. By applying the methods of quantitative statistic, geographic spatial analysis, model building, remote sensing interpretation and GIS technology, this paper took the Xiliaohe watershed which is located in the east of farming-pastoral zone of northern China as a case study area to interpret the Landsat TM images in 1995 and 2005, and to quantitatively analyze the spatio-temporal variation trends and characteristics of land use change during the recent 10 years; building water balance models to calculate the amount of water balance at different periods of time and further to reveal the spatio-temporal distribution of water balance with different land use types at different stages in the farming-pastoral zone of northern China; finally we established the index of water deficit model to comprehensively assess the effects of land use change on water balance. The results showed that: 1) from 1995 to 2005, the whole characteristics of land use did not change, generally, the situation of land use was farmland area increased and grassland area reduced. 2) The main feature of land use and water balance was moderately water deficit. The extremely water deficit areas relatively concentrated in the central Xiliaohe alluvial plain. 3) The land use and cover change made the water deficit situation further intensified in the Xiliaohe watershed from 1995 to 2005. The seriously water deficit area increased by 25%.

Key words: LUCC, land and water resources balance, farming-pastoral zone of northern China

CLC Number: 

  • F323.2