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:: Volume 12, Issue 40 (4-2018) ::
jwmseir 2018, 12(40): 105-114 Back to browse issues page
Temporal trend study of hydrological and meteorological drought in Karkheh watershed
Tayybe MesbahZadeh Ms , Farshad SoleimaniSardoo Mr
Abstract:   (2280 Views)

Drought is one of the known environmental phenomenon and impartible part of change climate that occurs in each geographic region. In this study was used Standardized Precipitation Index (SPI) and streamflow drought index (SDI) for assessment and analysis of droughts incidence temporal. For this purpose, were used monthly statistics of 10 rain gauge and 5 hydrometric stations in Karkheh watershed and indicators investigated in 3 timeframes (12, 24, 48 months). At the first, relationship of precipitation and runoff investigated for drought effect study on surface water resources.  Then the standardized data rate (SDI) with SPI time series at varies temporal interval using Pearson correlation was studied in the whole of basin and sub basin also compared separately. The results showed that temporal relationship of hydrological and meteorological drought occurrence is meaningful in level of 99 % with together and this correlation is maximum in 48 months. Drought occurrence in case study showed its effect on surface water resources with a delay of 2 months or 1 month that due to the karstic region. 

Keywords: Standardized Precipitation Index, Streamflow drought index, Pearson correlation, Karkheh watershed
Full-Text [PDF 1607 kb]   (567 Downloads)    
Type of Study: Research | Subject: Special
Received: 2017/04/25 | Accepted: 2018/02/16 | Published: 2018/03/14
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MesbahZadeh T, SoleimaniSardoo F. Temporal trend study of hydrological and meteorological drought in Karkheh watershed. jwmseir. 2018; 12 (40) :105-114
URL: http://jwmsei.ir/article-1-728-en.html

Volume 12, Issue 40 (4-2018) Back to browse issues page
مجله علوم ومهندسی آبخیزداری ایران Iranian Journal of Watershed Management Science and Engineering
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