Temporal soil erosion risk evaluation: a CORINE methodology application at Elmalı dam watershed, Istanbul

Geographical information systems (GIS)-based soil erosion risk assessment models continue to play an important role in soil conservation planning. In the present study, soil erosion risk of Istanbul–Elmalı dam watershed was determined within GIS-based COoRdination of INformation on the Environment (...

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Bibliographic Details
Published in:Environmental earth sciences 2010-10, Vol.61 (7), p.1457-1465
Main Authors: Aydın, Abdurrahim, Tecimen, Hüseyin Barış
Format: Article
Language:English
Subjects:
Anthropogenic factors
Biogeosciences
Dams
Drought
Drought index
Earth and Environmental Science
Earth Sciences
Environmental Science and Engineering
Erosion rates
Geochemistry
Geographic information systems
Geology
Hydrology/Water Resources
Land use
Original Article
Risk assessment
Soil conservation
Soil depth
Soil erosion
Soil texture
Terrestrial Pollution
Watersheds
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Summary:Geographical information systems (GIS)-based soil erosion risk assessment models continue to play an important role in soil conservation planning. In the present study, soil erosion risk of Istanbul–Elmalı dam watershed was determined within GIS-based COoRdination of INformation on the Environment (CORINE) soil erosion risk assessment method. Initially soil texture, soil depth, and surface stoniness maps were created and were intersected in GIS environment in order to generating erodibility map. Then, Fournier precipitation and Bagnouls–Gaussen drought indices determined based on meteorological data and erosivity were calculated. The composed erodibility map was co-evaluated within erosivity value and slope map of the site for composing potential erosion risk map. At the final step, the previous yearly land use maps which belong to years 1984, 1992, and 2003 intersected with potential erosion risk maps and temporal actual erosion risk alteration were assessed. In conclusion, according to our results in Elmalı watershed dam in 1984 there have been low, medium, and high erosion risks at rates 29.67, 52.49, and 17.84%, respectively, whereas in 2003 the erosion risk values have changed from low to high as 26.43, 46.57, and 27.00%, respectively. Inter-year comparison alteration to the advantage of the high erosion risk could have resulted from over degradation and high exposure to anthropogenic activities.
ISSN:1866-6280
1866-6299
DOI:10.1007/s12665-010-0461-2