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:: Volume 11, Issue 39 (1-2018) ::
jwmseir 2018, 11(39): 89-99 Back to browse issues page
Assessment of Hydrological Drought Using Constand Treshold Level
Ali Salajeghe Mr, Taibe Mesbahzade Ms , Farshad Soleimani Sardoo Mr, Nahid Alipour Ms
university of tehran
Abstract:   (2726 Views)
Drought is an insidious environmental phenomena. This phenomenon causes water shortage for some activity, group or environment. Drought Should compared With Climate Conditions and  Hydrologycal Moderate in Long-term. Hydrological drought by reducing water storage in lakes, underground water levels and reduced river flow is detected And often "to affect a large area. The most common definition of a hydrological drought by defining a threshold that, if the river is less than a hydrologic drought is considered to be in this study, the threshold fixed (Q70 and Q90) to evaluate the hydrologic drought in the Karaj dam Basin. The results show that 1377 year was one of the driest years in this area and in Karaj station drought in 1377 year 284 days in 255 days Gachsar station is continued. The results show a total lack of water in Gachsar station Q70 threshold equal to 68/11 million cubic meters, equivalent to 75.2 million cubic meters Kalavan stations as well as in Karaj station 44/42 million cubic. As well as the general extreme value (GEV) best fit the parameters of the drought. The results can be used in water resources management and planning necessary to prevent or mitigate the effects of drought in the area.
Keywords: hydrological drought, the threshold fixed, general extreme value (GEV), Karaj Dam Basin
Full-Text [PDF 922 kb]   (573 Downloads)    
Type of Study: Research | Subject: Special
Received: 2017/02/17 | Accepted: 2017/12/28 | Published: 2018/01/7
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Salajeghe A, Mesbahzade T, Soleimani Sardoo F, Alipour N. Assessment of Hydrological Drought Using Constand Treshold Level. jwmseir. 2018; 11 (39) :89-99
URL: http://jwmsei.ir/article-1-714-en.html

Volume 11, Issue 39 (1-2018) Back to browse issues page
مجله علوم ومهندسی آبخیزداری ایران Iranian Journal of Watershed Management Science and Engineering
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