Keywords

Watershed Delineation, eRAMS, CSIP, GDAL, TauDEM

Start Date

27-6-2018 3:40 PM

End Date

27-6-2018 5:00 PM

Abstract

Watershed delineation tool was developed in the Environmental Resource Assessment & Management System (eRAMS) platform using open source software technologies. This tool processes Digital Elevation Model (DEM) and DEM-driven raster data to delineate watersheds using two open source software technologies, TauDEM and GDAL. Users can upload their own DEM or create one using NHDPlusV2, which is provided by default in eRAMS watershed delineation tool. During processing of the DEM, it was found that the flat area was excluded in the stream raster pixels calculated from TauDEM ‘Peuker Douglas’ module; therefore this module was modified to include stream pixels on flat areas, which had a larger flow accumulation value than the threshold. This threshold was decided as the average of flow accumulation values on Peuker Douglas Stream pixels. To provide users flexibility, three options, Advanced, Basic, and Watershed Extraction, were developed. The Advanced option lets users run every module required for watershed delineation one by one. The basic option allows users to run every module automatically at once without configuring intermediate processes if DEM and outlet points are provided. Watershed extraction module uses NHDPlusV2 flow direction raster to extract watershed rapidly using the outlets and an area of interest. TauDEM modules were used in the Cloud Service Innovation Platform (CSIP), which were called by the eRAMS platform. The tool can be used any place in the continental US.

Stream and Session

Stream A: Advanced Methods and Approaches in Environmental Computing

A6: Innovation in Continental Scale Modelling for Decision-making, Research, and Education

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Jun 27th, 3:40 PM Jun 27th, 5:00 PM

Development of Watershed Delineation Tool Using Open Source Software Technologies

Watershed delineation tool was developed in the Environmental Resource Assessment & Management System (eRAMS) platform using open source software technologies. This tool processes Digital Elevation Model (DEM) and DEM-driven raster data to delineate watersheds using two open source software technologies, TauDEM and GDAL. Users can upload their own DEM or create one using NHDPlusV2, which is provided by default in eRAMS watershed delineation tool. During processing of the DEM, it was found that the flat area was excluded in the stream raster pixels calculated from TauDEM ‘Peuker Douglas’ module; therefore this module was modified to include stream pixels on flat areas, which had a larger flow accumulation value than the threshold. This threshold was decided as the average of flow accumulation values on Peuker Douglas Stream pixels. To provide users flexibility, three options, Advanced, Basic, and Watershed Extraction, were developed. The Advanced option lets users run every module required for watershed delineation one by one. The basic option allows users to run every module automatically at once without configuring intermediate processes if DEM and outlet points are provided. Watershed extraction module uses NHDPlusV2 flow direction raster to extract watershed rapidly using the outlets and an area of interest. TauDEM modules were used in the Cloud Service Innovation Platform (CSIP), which were called by the eRAMS platform. The tool can be used any place in the continental US.