The Design and Implementation of Drainage-Basin Extraction

Abstract:

The flow model was improved on, and the two kinds of circumstances were discussed. When the current flow point is on the borders, the flow direction is remained if the water doesn’t flow along the borders. When the current flow point is not next to the blank spots in two adjacent directions, the flow direction is remained. And then, I designed the algorithm of the follow-up processing steps to extract drainage-basin, such as process depression, the determination of river, river classification, partition side-area, search drainage- basin border, smooth river and smooth drainage-basin border. Finally, I solved the problems about the around-flows and the cross-flows. The input data contains the terrain elevation of the grid data, and the output data is MAPGIS open data.

• Periodical: Advanced Materials Research (Volumes 610-613)
• Pages: 2440-2444
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.610-613.2440
• Online since: December 2012
• Authors: Dan Dan Su, Guang Da Gao, Ji Zhang Fan, Guang Sheng Liu, Chuan Tao Guan
• Keywords: Control Area, Flow Direction, Random Flow Model

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