Assessment of drought hazard index using standardized precipitation indexandnbsp;(Case Study: Semnan province, Iran)andnbsp;

Nasrollahi, M.; Khosravi, H.; Moghaddamneia, A.; Malekian, A.

Assessment of drought hazard index using standardized precipitation indexandnbsp;(Case Study: Semnan province, Iran)andnbsp;

Authors

M. Nasrollahi

H. Khosravi

A. Moghaddamneia

A. Malekian

Abstract

Drought occurrence has great impact on the quantity and quality of ground and surface water which inandnbsp;turn affects different aspects of human life including agriculture, water resources and socio-economicissues. Few researches have been performed so far on spatial analysis of drought hazard in Iran. The aimandnbsp;of this study is to determine the spatial and temporal patterns drought hazard index (DHI) and producingandnbsp;the map of this index in Semnan province, Iran. The Standardized Precipitation Index (SPI) was deployedandnbsp;at 3 and 12 monthsandrsquo; time scale for generating the map of drought hazard Index (DHI). Kriging andandnbsp;Natural Break methods were elaborated in GIS environment for zoning and classification respectively.andnbsp;The results showed that in 3 month time scale, highest droughts hazard are observed in the northern andandnbsp;central parts of the province and for the 12 month time scale, droughts pose highest hazard to the southernandnbsp;parts would experience the highest values of DHI.andnbsp;

Keywords

Drought

Kriging

Hazard

Natural break

SPI

Semnan