آثار و پيامدهاي خشكسالي بر منابع آب حوضه مركزي گناباد طي دوره 1385-1365

The Drought Effects on Gonabad Central Basin Water Resources (Period 1986-2006)

Drought is a natural hazard temporarily affecting almost every region in the world. The temporary shortage of water poses a great threat on nature, quality of life and economy. This have at sec sectors and mealy more stringency. Wastage unlike usage normal rainfall motive hack accession drought. Medication drought is Impressive in water poses, agronomy and locale economy If the drought author become, decrease sister-in-lawʹs water downfall surface under ground water and reduction quantity water poses, then will down hydrological drought. Soften thither perennial stream have not of this extent, water resources is dependent to under ground water for example Qantas, shafts and in springs who trace vengeful of rainfall commutation. The object this research is scrutiny drought in the central region who (is soften under extents Dasht-e-Loot) and efficacy for this basin water resources. At this research conspicuous grow outbreak drought and that proportion with two indexes: percent of normal and Standardized Precipitation Index) SPI). Then receipt proof with two indexes: downfall surface water tablecloth subterranean, reduction water measure, plurality shattering bottom in shafts extent and reduction plurality fountains water who n fountains water and author became hydrological drought in the study instances precinct. Therefore analyses threshold 48 times rainfall in statistic term and influence division rainfall at sensation drought. Then receipt proof with fore indexes: downfall surface water tablecloth subterranean, reduction water measure, plurality shattering bottom in shafts extent and reduction plurality fountains water who affected drought of year 1986 than 2006 result leaved upon fountains water and author became hydrological drought in the study instances precinct. This droughts author reduction quantity water resource precinct on affect drought result leaved upon measure %48 in Qantas, %30 in shafts and %31 in spry.