[1]FENG Jianmin,GUO Lingxia,CHEN Lingxia.Analysis on Terrain Characteristic of Land Use Changes and Its Ecological Effect During the Last 10 Years in Shenmu County[J].Research of Soil and Water Conservation,2016,23(03):132-136.
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Analysis on Terrain Characteristic of Land Use Changes and Its Ecological Effect During the Last 10 Years in Shenmu County
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
23
Number of periods:
2016 03
Page number:
132-136
Column:
Public date:
2016-06-28
- Title:
- Analysis on Terrain Characteristic of Land Use Changes and Its Ecological Effect During the Last 10 Years in Shenmu County
- CLC:
- F301.24
- DOI:
- -
- Abstract:
- Taking Shenmu County as study area, based on the land use change information obtained from TM images in 2000 and 2010 and the data of DEM,using the method and mode about ecological value estimation, we comprehensively analyzed the change rule of land use and its ecological effect in different altitude and slope. The results show that: (1) the distribution and change of different land use types had obvious differentiation characteristics in every terrain factor level, arable area had sharply reduced in low gentle slope and gentle slope with altitude of 950～1 250 m. The areas of grassland, woodland, built-up and unused land increased significantly in flat, slight slope and gentle slope with altitude of 1 050～1 250 m. The phenomenon of the area increase of industrial land happened in the flat and slight slope with altitude of 950～1 250 m. The water body slightly increased at the altitude of < 950 m and 1 150～1 250 m, but obviously reduced at the other altitude grades with reduction in all slope levels, especially concentrated in flat and slight slope area; (2) the ecosystem service values had reduced in high altitude localities with altitude > 1 250 m or flat and slight slope area, meanwhile increased at the other elevation and slope levels. The modulus of ecological effects generally increased with the increase of elevation level, but appeared obvious ‘V’ shape characteristics in grade level. Thus the flat and abrupt slope land of high altitude localities with altitude more than 1 250 m strongly affected ecological environment in the studied area.
- References:
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