DEM Resolution Impact on the Estimation of the Physical Characteristics of Watersheds by Using SWAT

<table class="table-group" id="tab13"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Watershed</td><td class="align_center">ASTER versus LDD</td><td class="align_center">SRTM versus LDD</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Huai-Sai-Khaw (small mountainous area)</td><td class="align_center">2.95%</td><td class="align_center">3.23%</td></tr><tr><td class="align_left">Huai-Por- Phan (small flat area)</td><td class="align_center">8.32%</td><td class="align_center">6.04%</td></tr><tr><td class="align_left">Huai-Sai-Bath (medium flat area)</td><td class="align_center">32.98%</td><td class="align_center">26.35%</td></tr><tr><td class="align_left">
                  Nam-Yang (large flat area)</td><td class="align_center">193.36%</td><td class="align_center">336.92%</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Difference in stream slopes extracted from LDD DEM, ASTER DEM, and SRTM DEM.

Advances in Civil Engineering

tab13

Table 13

Table 13: DEM Resolution Impact on the Estimation of the Physical Characteristics of Watersheds by Using SWAT 