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- Title
淅川县石质荒漠化土地坡度分级及岩性特征.
- Authors
徐建昭; 吴 卿; 孙俊青; 张 璐; 赵 培; 魏 冲; 陈子韶; 刘 哲
- Abstract
Xichuan County is the core source area and the main flood zone of the Mid-Route of the South-to-North Water Transfer Project and also the location of the head work, which the land area of the stone desertification is 745.539 3km2, which accounts for 26.44% of the total land area, which cause very serious problems of soil erosion and regional ecological resources. Slope and lithology are important factors of soil erosion development. Using DEM geological map, etc, the paper studied the land slope and lithology characteristics of stone desertification in Xichuan County based on 3S technique. The results show that the stone desertification in Xichuan County mainly occurred in the area of carbonate formation, range of 8°-25° and carbonate rocks; the total area of 8°-25° is 588.001 5 km2, which accounts for 78.87%; stone desertification land slope increases with the increase of slope at less than 25°, and the slope over 25° decreases with the increase of slope, the minimum area of >35° is 2.679 3km2, which is only 0.36%. The land lithology of Xichuan County is mainly carbonate rock group, clastic rock group, multilayer soil, metamorphic rock group and intrusive rock group. The land distribution area of stone desertification in each rock area is 461.59 km2, 164.54 km2, 119.20 km2, 66.86 km2 and 40.63 kin2 respectively and the average incidence are 58.26%, 23.56%, 1.96%, 30.74% and 24.98% respectively. The distribution area of stone desertification in carbonate formation area is obviously higher than that of other lithologic regions.
- Publication
Yellow River, 2018, Vol 40, Issue 10, p88
- ISSN
1000-1379
- Publication type
Article
- DOI
10.3969/j.issn.1000-1379.2018.10.019