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《Acta Geographica Sinica》 2006-03
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Developments of Alluvial Fans and Their Catchments in Houma Basin

LI Xinpo1, MO Duowen1, ZHU Zhongli2(1. College of Environmental Sciences, Peking University, Beijing 100871, China;2. School of Geography, Beijing Normal University, Beijing 100875, China)  
We collected indexes of alluvial fans and their drainage basins from DEM data, and analyzed distribution of these indexes. By comparison of distribution curves of these indexes with elevation distribution curve of piedmont landforms, we did some research on the developments of alluvial fans and their drainage basins. As a result, we find that the alluvial fans and their drainage basins in the uplift region of Houma basin differ greatly from those in the sunken region; distributions of drainage basin indexes are mainly influenced by tectonic activity of boundary fault; alluvial fans are influenced by factors of drainage basin, tectonic movement of boundary fault and base level together; and lithological difference between rocks and underlying drainage basins is not the main factor leading to difference in alluvial fans in the study area.
【Fund】: 国家自然科学基金项目(40271013);; 教育部博士点基金项目(99000149)~~
【CateGory Index】: P931.1
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