Developments of Alluvial Fans and Their Catchments in Houma Basin
Received date: 2005-08-26
Revised date: 2005-11-14
Online published: 2006-03-25
Supported by
National Natural Science Foundation of China, No.40271013; Supporting Project of The Ministry of Education on Doctorial Discipline, No.99000149
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.
Key words： alluvial fan; drainage basin; landform; Houma basin; Shanxi graben
LI Xinpo, MO Duowen, ZHU Zhongli . Developments of Alluvial Fans and Their Catchments in Houma Basin[J]. Acta Geographica Sinica, 2006 , 61(3) : 241 -248 . DOI: 10.11821/xb200603002
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