Paper Details

Lithology effects on gully erosion in Ghoori chay Watershed using RS & GIS

Ghader Golestani, Lida Issazadeh, Reza Serajamani

DOI: https://dx.doi.org/10.12692/ijb/4.2.71-76

Int. J. Biosci. 4(2), 71-76. January, 2014. (PDF)

Abstract:

Gully erosion, which is the most damaging effect on soil, is occurred in agricultural lands in Iran and caused diminishing soil fertility and filling dams and reservoirs, also it is a threatening for roads, buildings and agricultural lands.Gullies are the extensive kind of soil erosion and for controlling it, you should know the factors effects on gully extension. One of the factors which control erosion in watersheds is lithological characteristics of the watershed.In this study, after digitizing the lithological map by using ILWIS3.4 software, resistance to corrosion coefficient factor and the map of erosion susceptibility was obtained.The map of gully erosion in watershed was prepared based on the Field trials by GPS, IRS, satellite images and aerial photographs. Finally, by using statistical analysis, the map of susceptible to erosion in ILWIS software was segmented with the gully erosion map. Results showed high Correlation coefficient with 0.97 and indicated gully erosion in Ghoorichay watershed is more influenced by the kind of lithological structure.