Raster-network regionalization for watershed data processing

doi:10.1080/13658810600965255

Raster-network regionalization for watershed data processing

2007-03-01

10

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AI

DOI：10.1080/13658810600965255

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Difficulties exist in calculating watershed parameters from raster datasets over large regions because of the excessive computation time involved. A technique is presented which divides a large region into hydrologically distinct subregions, in each of which raster analyses are performed, in order to efficiently process large raster datasets. The results of raster analyses are stored as attributes on the resulting vector data. The vector data are then merged, and appropriate values accumulated to obtain regional parameter values for points of interest along the stream network. The technique, called Raster-Network Regionalization, uses the vector stream network as the backbone for the integration of subregions into a single region. A case study is presented which utilizes the technique to prepare geospatial inputs for the Water Rights Analysis Package simulation model.

Keyword:

regionalization

ArcGIS hydro data model (Arc Hydro)

WRAP hydro

water supply modelling

Raster-network regionalization for watershed data processing

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