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[1]LIU Yan-guo,WANG Qing,WANG Jun.Landscape Stability and Environment Effect of Land Covers in Guansihe Watershed[J].Research of Soil and Water Conservation,2012,19(03):166-169,174.

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Landscape Stability and Environment Effect of Land Covers in Guansihe Watershed

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 03 Page number: 166-169,174 Column: Public date: 2012-06-20

Title:: Landscape Stability and Environment Effect of Land Covers in Guansihe Watershed

Author(s):: LIU Yan-guo¹, WANG Qing¹, WANG Jun²; 1. School of Environment and Resources, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China;
2. Remote Sensing Centre of Sichuan Province, Chengdu 610081, China

Keywords:: RS/GIS; Guansihe watershed; landscape patches; stability; environmental effect

CLC:: X171.1

DOI:: -

Abstract:: TM remote sensing data of Guansihe watershed in the two periods of 1995 and 2005 was taken as the basic information source, and vector data of landscape types was extracted with the RS, GIS and mathematical statistics method. Three indices such as matrix proportion, change rate of patch number and area, change rate of patch density as well as transform rule of landscape types were used for landscape stability study in this watershed. The results showed that: (1) in the whole watershed, cultivated land was matrix of the artificial landscape which was in frequent farming and dynamic change, the stability was not high; Pinus massioniana woodland was matrix of the semi-natural landscape whose stability was also low, but had improved; both of them played a leading role in maintaining the regional ecological environment for the better development; (2) patch stability of town and water areas were the highest, Pinus massioniana woodland, Quercus aliena woodland and Cupressus funebrius woodland were ranked as the second place, cultivated land and villages were the lowest; this was consistent with the position of the watershed as a typical compound ecological agriculture and forestry areas; (3) dramatic transformation of cultivated land, water areas and woodlands were the most, which was closely related to the land conversion projects implemented in the watershed since 1998, but the stability of water areas and woodlands still depended on their natural stability, and the landscape pattern presented good development tendency; (4) stability of medium and small patches of Pinus massionian woodland and Cupressus funebrius woodland played an important role in the stability of the watershed, which were also in the node location of ecological environment change trend, should be protected, planed and constructed scientifically and reasonably.

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