Pollution Research Paper

MATRIX OVERLAY FOR EVALUATION OF DROUGHT VULNERABILITY

ABDOL RASSOUL ZAREIEE *, MASOMEH HAYDARI AND MARJAN TALEBINEYA

Abstract

The purpose of this study was to make a model of the drought vulnerability area using matrix overlay (with emphasis in Meteorological and hydrological Drought). Matrix overlay function in ArcGIS developed by IRRFIB model and expert judgment. Vulnerability indicators have different severity of vulnerability classification. The drought Vulnerability indicator maps take into account the meteorological and hydrological that related to drought vulnerability. Each of the Vulnerability indicator maps and also final Vulnerability map are classified into 4 Vulnerability classes of drought: mild, moderate, severe and very severe. Result of this paper show that in the plains of Ghareh Aghaj basin the mild and moderate drought Vulnerability area cover mainly surface of the region, mild and moderate drought vulnerability covers approximately 37% and 32%of the regain .Almost the severe drought vulnerability area covers approximately 22% and very severe drought vulnerability area covers approximately 9% of the regain.