Drought is a slow-onset phenomenon that evolves over season or even years. affects people more than any other natural disaster due to its widespread and significant negative impacts. Population growth associated water demand add further stress on resources, especially in periods of drought. indices represent single value resulting from processing considerable amount data. These provide short me...

drought is random and nonlinear phenomenon and using linear stochastic models, nonlinear artificial neural network and hybrid models is advantaged for drought forecasting. this paper presents the performances of autoregressive integrated moving average (arima), direct multi-step neural network (dmsnn), recursive multi-step neural network (rmsnn), hybrid stochastic neural network of directive ap...

drought is a major problematic phenomenon for the mostly semi-arid country of iran. the north centralregions of iran (north of esfahan and ghom province) have suffered from severe droughts several times duringthe last three decades. the frequent occurrence of drought in these regions is due to low and inconsistentprecipitation, abnormally high temperatures, increases in surface albedo and evapo...

In order to study the impact of drought stress and planting date on safflower yield and yield components, an experiment was performed in Tabriz region in 2011. The experiment was carried out as split-split plot based on randomized complete block design. The main factor which was applied as split plot includes drought stress  with three levels:  (S1) 80 ± 3 mm evaporation from basin level of cla...

Indonesia’s fire and haze problem is reviewed, and a model quantifying the relationship between drought and haze from biomass burning in western Indonesia is presented. Visibility observations from weather stations in Sumatra and Kalimantan were used as a haze indicator. The Drought Code component of the Canadian Forest Fire Weather Index System was used as a drought indicator. Using meteorolog...

isfahan province is located in the center of iran and has arid and semi-arid climate. in recent years, water shortage has increased in this region and has affected crop production. wheat is one of the most important crops of the province. in the present research, an index (dei) has been developed for drought evaluation using long term climatic data through application of principle components an...

Meteorological drought is among the key climate-related risks affecting Ethiopia. It indicates a shortage of precipitation over long period, usually for season or year. This study uses copula theory to analyze meteorological in upper Tekeze river basin, Northern part analysis using provides promising opportunity deal with such advance and improve sectoral resilience. In this study, long-year (1...

Understanding the response of vegetation to drought is great significance biodiversity protection terrestrial ecosystem. Based on MOD13A2 NDVI, GOSIF, and SPEI data Yellow River Basin from 2001 2020, this paper used methods Theil–Sen median trend analysis, Mann–Kendall test, Pearson correlation analysis analyze whether change trends monitored by MODIS GOSIF are consistent their sensitivity mete...

drought as a climatic phenomenon affected many different environmental issues and generally is associated with the decreasing in average precipitation. evaluation and monitoring of the drought is a fundamental step in proper programming of water resources management. regarding the recent conditions water scarcity in the urmia lake basin, assessment of the drought index in this region is inevita...