How large is the Critical review on arcgis modeling paper pdf Indus Basin? Auto pit-filling applied to DEMs can result in significant errors in catchment areas.
The Pangong Tso catchment is not part of the UIB, for at least past thousand years. Past studies based on the over-estimated watershed areas of the UIB need revision. However, accurate delineation depends on the quality of the DEM and the methodology adopted. Automatic delineation defined a basin area of c. UIB, but included a large area of internal drainage in the western Tibetan Plateau. For the UIB we have identified critical points where spurious addition of catchment area has arisen, and use Google Earth to examine the geomorphology adjacent to these points, and also examine the basin boundary data provided by the HydroSHEDS database. We show that the Pangong Tso watershed and some other areas in the western Tibetan plateau are not part of the UIB, but are areas of internal drainage.
This matches the catchment area measured by WAPDA SWHP. An important lesson from this investigation is that one should not rely on automated delineation, as iterative pit-filling can produce spurious drainage networks and basins, when there are areas of internal drainage nearby. Check if you have access through your login credentials or your institution. Critical review of models, frameworks and tools for sustainable urban water management, and the potential of GIS-MCDA. A comprehensive spatial suitability assessment framework for WSUD placement, that can form the basis for new planning tools.