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Impacts of Accuracy and Resolution of Conventional and LiDAR Based DEMs on Parameters Used in Hydrologic Modeling

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  • Zhengyong Zhao
  • Glenn Benoy
  • Thien Chow
  • Herb Rees
  • Jean-Louis Daigle
  • Fan-Rui Meng

Abstract

Digital elevation model (DEM) is often used for hydrologic modeling, land use planning, engineering design and environmental protection. Research is required to assess the need of updating existing conventional DEM using higher resolution and more accurate DEMs, including light detection and ranging (LiDAR) DEM. The objective of this study was to evaluate effects of DEM accuracy and resolution on hydrologic parameters and modeling in an agriculture-dominated watershed. DEMs compared included 1 m and 10 m LiDAR based DEMs, and a conventional 10 m DEM obtained with aerial photogrammetry method. Hydrologic parameters assessed included elevation, sub-basin area and boundaries, drainage networks, slope and slope length. DEM derived hydrological parameters were used to estimate soil loss in Black Brook Watershed, New Brunswick using Revised Universal Soil Loss Equation (RUSLE). Results indicated that DEM resolution had substantial influence on the sub-basins boundaries, sub-basin area, and distribution of water flow lines. Field investigation confirmed that most of the water flow lines derived from 1 m LiDAR based DEM were accurate and a number of flow diversion terraces (FDT) failures had been identified with help of LiDAR 1 m DEM. Both conventional and LiDAR based 10 m DEM could not identify the impacts of soil conservation structures such as diversion terraces. The RUSLE predicted soil loss using 1 m LiDAR based DEM was considered to be better because both conventional and LiDAR based 10 m DEMs could not reflect the impact of FDTs on reducing soil loss. Copyright Springer Science+Business Media B.V. 2010

Suggested Citation

  • Zhengyong Zhao & Glenn Benoy & Thien Chow & Herb Rees & Jean-Louis Daigle & Fan-Rui Meng, 2010. "Impacts of Accuracy and Resolution of Conventional and LiDAR Based DEMs on Parameters Used in Hydrologic Modeling," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 24(7), pages 1363-1380, May.
    • Handle: RePEc:spr:waterr:v:24:y:2010:i:7:p:1363-1380
    DOI: 10.1007/s11269-009-9503-5
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    Citations

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    Cited by:

    1. Shizhou Ma & Karen F. Beazley & Patrick Nussey & Christopher S. Greene, 2021. "Assessing Optimal Digital Elevation Model Selection for Active River Area Delineation Across Broad Regions," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 35(14), pages 4825-4840, November.
    2. Junyu Qi & Kang Liang & Sheng Li & Lichun Wang & Fan-Rui Meng, 2018. "Hydrological Evaluation of Flow Diversion Terraces Using Downhill-Slope Calculation Method for High Resolution and Accuracy DEMs," Sustainability, MDPI, vol. 10(7), pages 1-13, July.
    3. Anita Kwartnik-Pruc & Aneta Mączyńska, 2022. "Assessing Validity of Employing Surveying Methods to Capture Data on Topography to Determine Hydrological and Topographic Parameters Essential for Selecting Locations for the Construction of Small Hyd," Energies, MDPI, vol. 15(4), pages 1-41, February.
    4. Xiaogang Ding & Zhengyong Zhao & Zisheng Xing & Shengting Li & Xiaochuan Li & Yanmei Liu, 2021. "Comparison of Models for Spatial Distribution and Prediction of Cadmium in Subtropical Forest Soils, Guangdong, China," Land, MDPI, vol. 10(9), pages 1-21, August.

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