• A simple depression-filling method for raster and irregular elevation datasets

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      https://www.ias.ac.in/article/fulltext/jess/124/08/1653-1665

    • Keywords

       

      Digital elevation model; depression filling; pseudo flow direction; irregular terrain dataset.

    • Abstract

       

      A variety of methods have been developed to process digital elevation models (DEMs) in order to extract morphological properties of land surfaces. Almost all rely on depression filling to facilitate drainage analysis. This study proposes an intuitive and relatively simple depression-filling algorithm, which is readily applicable to raster and irregular datasets. In this study, topographic data of two watershed areas were provided to test the capability of this new algorithm. The results show that the proposed algorithm can accurately identify the locations of depressions and efficiently assign pseudo flow directions across the filled depressions.

    • Author Affiliations

       

      Pin-Chun Huang1 Kwan Tun Lee1 2

      1. Department of River and Harbor Engineering, National Taiwan Ocean Univ., Keelung 202, Taiwan, Republic of China.
      2. Taiwan Typhoon and Flood Research Institute, National Applied Research Lab., Taipei 100, Taiwan, Republic of China.
    • Dates

       
  • Journal of Earth System Science | News

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      Posted on July 25, 2019

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