A new method for the determination of flow directions and upslope areas in grid digital elevation models
書誌事項
- 公開日
- 1997-02
- 権利情報
-
- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
-
- 10.1029/96wr03137
- 公開者
- American Geophysical Union (AGU)
この論文をさがす
説明
<jats:p>A new procedure for the representation of flow directions and calculation of upslope areas using rectangular grid digital elevation models is presented. The procedure is based on representing flow direction as a single angle taken as the steepest downward slope on the eight triangular facets centered at each grid point. Upslope area is then calculated by proportioning flow between two downslope pixels according to how close this flow direction is to the direct angle to the downslope pixel. This procedure offers improvements over prior procedures that have restricted flow to eight possible directions (introducing grid bia) or proportioned flow according to slope (introducing unrealistic dispersion). The new procedure is more robust than prior procedures based on fitting local planes while retaining a simple grid based structure. Detailed algorithms are presented and results are demonstrated through test examples and application to digital elevation data sets.</jats:p>
収録刊行物
-
- Water Resources Research
-
Water Resources Research 33 (2), 309-319, 1997-02
American Geophysical Union (AGU)
