Interaction of Land Use Change and Spatial and Temporal Dynamics of Soil Moisture and Salinity in Arid Land

  • 1. Research Center for Eco-Environmental Sciences, CAS, Beijing 100085, China;
    2. Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China;
    3. College of Resources and Environment Science, Xinjiang University, Urumqi 830046, China

Received date: 2003-05-16

  Revised date: 2003-08-29

  Online published: 2003-11-25

Supported by

National Key Project for Basic Research, No.G1999043503


In 2000 and 2001, the water content and salinity of soil, groundwater table and salt concentration were investigated in Sangonghe basin. Using the land use maps of 1987 and 1998, the dynamics of land use and the influence of spatio-temporal dynamics of water and salinity on land use are analyzed. In old oasis of the upper reaches of the rivers, farmland area increased gradually, and water used in old oasis also increased, acccounting for over 90% of the total runoff. Compared with 1988, 1998 witnessed a drop of groundwater table in old oasis but a rise in all investigation spots of new oasis in the lower reaches. In the new oasis of lower reaches of Songonghe, from oasis, ecotone to sand dune, soil salinity has not changed much, and no significant differences among these ecosystems have been found. Soil water content has decreased much from oasis, ecotone to sand dune. In ecotone, influenced by irrigation of the adjoining oasis, groundwater table has been raised and soil water content also increased compared with sand dune nearby, vegetation developed well, ecotone has been very stable and border of oasis has not changed for decades. From oasis to abandoned land and desert grassland, soil salinity changes much with significant difference in spatial variations. In abandoned land and peripheral desert of oasis, influenced by irrigation of oasis, groundwater table has been raised above the critical depth.Because the soil salt cannot be eluviated by irrigation water and precipitation, salt brought to the upper layers of soils by strong evaporation is especially concentrated on soil surface.

Cite this article

GU Fengxue, ZHANG Yuandong, PAN Xiaoling, CHU Yu, SHI Qingdong . Interaction of Land Use Change and Spatial and Temporal Dynamics of Soil Moisture and Salinity in Arid Land[J]. Acta Geographica Sinica, 2003 , 58(6) : 845 -853 . DOI: 10.11821/xb200306007


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