Modelling topographic potential for erosion and deposition using GIS

被引:17
作者
Mitasova, H
Hofierka, J
Zlocha, M
Iverson, LR
机构
[1] UNIV ILLINOIS, DEPT GEOG, URBANA, IL 61801 USA
[2] COMENIUS UNIV BRATISLAVA, FAC NAT SCI, BRATISLAVA 84215, SLOVAKIA
[3] ILLINOIS NAT HIST SURVEY, CHAMPAIGN, IL 61820 USA
来源
INTERNATIONAL JOURNAL OF GEOGRAPHICAL INFORMATION SYSTEMS | 1996年 / 10卷 / 05期
关键词
D O I
10.1080/02693799608902101
中图分类号
P9 [自然地理学]; K9 [地理];
学科分类号
0705 ; 070501 ;
摘要
Modelling of erosion and deposition in complex terrain within a geographical information system (GIS) requires a high resolution digital elevation model (DEM), reliable estimation of topographic parameters, and formulation of erosion models adequate for digital representation of spatially distributed parameters. Regularized spline with tension was integrated within a GIS for computation of DEMs and topographic parameters from digitized contours or other point elevation data. For construction of flow lines and computation of upslope contributing areas an algorithm based on vector-grid approach was developed. The spatial distribution of areas with topographic potential for erosion or deposition was then modelled using the approach based on the unit stream power and directional derivatives of surface representing the sediment transport capacity. The methods presented are illustrated on study areas in central Illinois and the Yakima Ridge, Washington.
引用
收藏
页码:629 / 641
页数:13
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