Assessment and management of land degradation using remote sensing and geographic information systems in Soughia river watershed, Crete, Greece
1998
Sdiri, E.
LANDSTAT TM images and GRASS GIS were used to build up the database. Topographic maps (1:50,000), geological maps (1:50,000) and other data in the form of tables and reports were incorporated into the GIS thus helping to generate new data sets in the geomorphologic variables, lock soil and rainfall distribution. GRASS GIS programs offered very efficient ways in obtaining information on environmental variables from database in the form of maps and statistics. The estimated soil erosion areas were delineated using the universal soil loss equation (USLE). Valuable information on rangeland planning and management was obtained by modeling soil erosion based on the rate and weight assignments into categories of soil, rainfall, vegetation cover, geology and slope gradient and length. The most severely soil eroded areas were recorded on steep land covered by sparse vegetation.
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