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[1]CAI Ke-ke,HE Zheng-wei,NI Zhong-yun,et al.Extraction and Analysis of Destroyed Land Information of Pengzhou Based on RS and GIS[J].Research of Soil and Water Conservation,2010,17(04):43-45,51.

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Extraction and Analysis of Destroyed Land Information of Pengzhou Based on RS and GIS

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 17 Number of periods: 2010 04 Page number: 43-45,51 Column: Public date: 2010-08-20

Title:: Extraction and Analysis of Destroyed Land Information of Pengzhou Based on RS and GIS

Author(s):: CAI Ke-ke^1,2, HE Zheng-wei^1,2,3, NI Zhong-yun^1,2, GAO Hui^1,2, WANG Le^1,2; 1. State Key Laboratory of Geohazard Prevention & Geoenvironment Protection, Chengdu 610059, China;
2. College of Earth Sciences, Chengdu Univerdity of Technology, Chengdu 610059, China;
3. Key Labortory of Resource Environment and GIS, Beijing Normal University, Beijing 100037, China

Keywords:: Wenchuan Eearthquake; disaster-destroyed land; elevation; slope; aspect

CLC:: TP79;P316

DOI:: -

Abstract:: Basing on TM images,according to the special topographical features and distribution characteristics of the disaster in study area,this paper divided research areas into several parts,extracted land-use maps of Pengzhou city before and after‘5·12’earthquake by zoning processing method.The disaster area of Pengzhou city is 200.53km²,occupying 14% of the total area.Images with R (4) G (2) B (7) band combination for distinguishing rivers and disaster,can greatly improve the speed and accuracy of extracting disaster.Overlay analysis disaster information with elevation data,gradient data,and aspect data showed that the relationship between disaster and elevation was positive correlation,disaster percentage first increased and then decreased.Along with the increase of slope,the most serious disasters happened on the slope of 35°～55°.West-southwest disaster percentage was relative higher,and that of east-southeast was the lowest.

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