Effects of DEM Source, Spatial Resolution and Drainage Area Threshold Values on Hydrological Modeling

Priyamitra Munoth () and Rohit Goyal ()
Additional contact information
Priyamitra Munoth: Malaviya National Institute of Technology, Jaipur
Rohit Goyal: Malaviya National Institute of Technology, Jaipur

Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), 2019, vol. 33, issue 9, No 21, 3303-3319

Abstract: Abstract Automated computation of hydrological and morphometric parameters of any watershed are not only depended on Digital Elevation Model (DEM) resolution but also affected by their sources and drainage Area Threshold Value (ATV). In present study, the effects of different resolution of freely available DEMs are analysed in QSWAT model at different ATVs. The performance of QSWAT model and processing time were also evaluated. DEM derived from ASTER, CARTOSAT and SRTM were used at 30, 90 and 180 m spatial resolutions with six different ATV’s, in QSWAT model. Result shows that DEM resolutions and ATVs have significant impacts on hydrological and morphometric parameters. QSWAT output like sub-basin count and surface runoff were less impacted by DEM resolutions while these components were affected by ATV, while HRU counts and sediment yield were affected by DEM resolution. It was also observed that fine resolution DEM increases processing time at smaller threshold values as compared to coarser resolution DEM. Result of this study could be used for selection of optimum DEM resolution and ATV.

Keywords: DEM; Modeling; Resolution; Threshold and QSWAT (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
http://link.springer.com/10.1007/s11269-019-02303-x Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:spr:waterr:v:33:y:2019:i:9:d:10.1007_s11269-019-02303-x

Ordering information: This journal article can be ordered from
http://www.springer.com/economics/journal/11269

DOI: 10.1007/s11269-019-02303-x

Access Statistics for this article

Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA) is currently edited by G. Tsakiris

More articles in Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA) from Springer, European Water Resources Association (EWRA)
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().