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Paper Information

Journal:   MODARRES HUMAN SCIENCES   FALL 2006 , Volume 10 , Number (TOM 48) GEOGRAPHY; Page(s) 213 To 234.
 
Paper: 

AN INVESTIGATION ON THE WATER CRISIS IN KHORASAN PROVINCE

 
 
Author(s):  VELAYATI S.A.*
 
* FERDOWSI UNIVERSITY, MASHHAD, IRAN
 
Abstract: 
Volume of the annual renewable waters in Khorasan province is about 11.9 billion cubic meters. Out of which 3.9 Bm3 belongs mainly to surface waters and 8 Bm3 to ground waters. These ground waters are found in aquifers of the province basins, and qualitatively are better than surface resources. About 9.7 Bm3 of the ground waters are extracted annually from the aquifers of the basins and consumed in different ways mainly in agriculture. Development in the from of ground water over draft by water wells (more than annual recharge) caused 58 out of 76 basins to face reservoirs deficits, creating severe water crisis in the province. The ground water reservoir deficit is 1.7 Bm3 per year. The reports prepared concerning the water crisis in Khorasan province till now attributed the main reason for the crisis to the droughts, while in this research, the main reason was proved to be the continuous over draft by the water wells, though the draughts also had an effective role in the water crisis. In proving the case, mean annual precipitation (5 years moving average) of each basin was compared and analyzed with its aquifer’s hydrograph, The obtained results showed that, though the ground water level should be high during the wet years, but they continued drop-off. Research method was scientific and comparative using software, statistical methods and field observations. Irrecoverable consequences of water crisis are:
Increasing pumping charges, ground water saltiness, ground subsidence producing fractures on the surface and environmental impacts.
 
Keyword(s): WATER CRISIS, AQUIFER, OVER DRAFT, HYDROGRAPH, GROUND SUBSIDENCE, DRAUGHT, MEAN OF MOVING PRECIPITATION
 
References: 
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