Student:	Zeynep ALTAN
Supervisor:	Yrd.Doç.Dr. Aykut AKGÜN
Department:	Jeoloji Mühendisliği
Institution:	Graduate School of Natural and Applied Sciences
University:	Karadeniz Technical University, Turkey

Title of the Thesis:	GIS-Based Erosion Risk Assessment of The Şebinkarahisar (Giresun) and Surroudings
Level:	M.Sc.
Acceptance Date:	17/6/2010
Number of Pages:	88
Registration Number:	i2183

Summary:

The purpose of the this thesis is to make an erosion risk assesment of an area around

Şebinkarahisar (GİRESUN) by Geographical Information System (GIS) and remote sensing

techniques.

In this study, four main data set such as Lansad 5 TM (2001) satellite images and

1/25000 scale geological maps and greater soil grups map and rain fall data of the surveying

area were used. From the digital topographical sheets, slope gradients and digital elevation

model was optained. In order to generate land use map from the surveying area , to determin

higher risc regionns, the RUSLE model were used. For his purpose, rain fall data , soil

erodibility factor, slope length and gradient, land cover factor, erosion control application

factor data are generated. In the determination of errosive effect of rainfall data are optained

from “State Meteorological Service”. The relation beween Grater Land Groups and gradient

taking into account, erodibility classes in the Grater Land Groups are used. In the determining

of soil erodibility factor from early works made in Turkey are used. According to Conrad

(2002) slope legth and gradient are optained by DIGEM software program. In order to

determine erosion control application factors, even if partly precaution were taken in to

account, the P value in agricultural land is 0.5 and in forests and settling areas is assigned as

1. This map contains erosion susceptible classes of the surveying area.

Key Words: Erosion, Geographical Information Systems, Remote Sensingi RUSLE Model