. Van Pelt SC, Swart RJ. Climate change risk management in transnational river basin: The Rhine. Water Resource Management, 2011; 25(1): 3837-3861.
. IPCC (Intergovernmental Panel on Climate Change). Summary for policy makers. In: IPCC. Climate change: The physical Science basic, Contribution of working group first to the Fourth assessment report of the intergovernmental panel on climate change, Cambridge university press, 2007: 450p.
. Quevauviller P. Adapting to climate change: reducing water-related risks in Europe – EU policy and research considerations. Environmental Science and Policy, 2011; 14(7): 722-729.
. Parvaneh B, Dargahian F, Shiravand H. Prediction of Drought in Lorestan province during 2011-2030 by downscaling 4 GCM models. Quarterly Geographical Journal of Territory, 2015; 12 (45):1-13. [Persian].
. Golmohammadi M, Massah Bavani A. The Perusal of Climate Change Impact on Drought Intensity and Duration, Journal of Water and Soil, 2011; 25(2): 315-326. [Persian].
. Kiem AS, Austin EK. Drought and the future of rural communities: Opportunities and challenges for climate change adaptation in regional Victoria, Australia. Global Environmental Change, 2013; 23:1307-1316.
. Philip GO, Babatunde JA, Gunner L. Impacts of climate change on hydro-meteorological drought over the Volta Basin, West Africa. Global and Planetary Change, 2017; 155; 121-132.
. Vidal JP, Wade S. A multimodel assessment of future climatological droughts in the United Kingdom. International Journal of Climatology, 2009; 29(14): 2056-2071.
. Babaeian E, Nagafineik Z, Zabolabasi F, Habibie M, Adab H, Malbisei S. Climate Change Assessment over Iran During 2010-2039 by Using Statistical Downscaling of ECHO- G Model, 2010; 7(16): 135-152. [Persian].
. Abdul Hosseini M, Eslamian S, Musavi SF. Analysis of variation of drought socio-economic characteristics and the effect of climate change, First National Conference on Meteorology and Water Management, Tehran, University of Technology, Department of Irrigation Engineering. 2010: 1-10. [Persian].
. Dastorani MT, Massah Bavani A, Poormohammadi S, Rahimian MH. Assessment of potential climate change impacts on drought indicators (case study: Yazd Station, Central Iran), Journal of Desert, 2011; 16(2):159-167. [Persian].
. Abbasi F, Asmari M. Forecasting and Assessment of Climate Change over Iran During Future Decades by Using MAGICC-SCENGEN Model, Journal of Water and Soil, 2011; 25(1): 70-83. [Persian].
. Vrochidou AE, Tsanis IK, Grillakis MG, Koutroulis AG. The impact of climate change on hydro meteorological droughts at a basin scale. Journal of Hydrology, 2013; 476(8): 290-301.
. Salehpour jam A, Mohseni Saravi M, Bazrafshan J, Khalighi S. Investigation of Climate Change Effect on Drought Characteristics in the Future Period using the HadCM3 model (Case Study: Northwest of Iran), Journal of Range and Watershed Management, 2015; 67(4): 537-548. [Persian].
. Nikbakht Shahbazi A. Standard Precipitation Index (SPI) analysis in Karoon 3 Watershed under climate change, Journal of Science Water Engineering, 2013; 3(8): 83-98. [Persian].
. Hoseinizade A, Seyed Kaboli H, Zarei H, Akhond Ali AM. The Intensity and Return Period of Drought under Future Climate Change Scenarios in Dezful Iran, Journal of Irrigation Science Engineering, 2016; 39(1): 33-43. [Persian].
. Sajjad Khan M, Coulibaly P, Dibike Y. Uncertainty analysis of statistical downscaling methods. Journal of Hydrology, 2006; 319(1-4): 357-382.
. McKee TB, Doesken NJ, Kleist J. The relationship of drought frequency and duration to time scales. In Proceedings of the 8th Conference on Applied Climatology, 1996; 17(22):179-183.
. Thom HCS. A note on the gamma distribution, Weather Review, 1958; 86(4):117-122.
. Abramowitz, M., Stegun, I.A. Handbook of Mathematical Functions. Dover Publications, 1965; New York.
. Edwards DC, McKee TB. Characteristics of 20th century drought in the United States at multiple time scales. Colorado State University, Climatology Report Number 97–2, Fort Collins, Colorado, 1997.
. Pirnia A, Golshan M, Bigonah S, Solaimani Karim. Investigating the drought characteristics of Tamar basin (upstream of Golestan Dam) using SPI and SPEI indices under current and
future climate conditions, Journal of Ecohydrology, 2018; 5(1); 215-228. [Persian].
. Bazrafshan O, Mohseni Saravi M, Malekian A, Moeini A. A study on drought characteristics of Golestan Province using Standardized Precipitation Index (SPI). Iranian Journal of Range and Desert Reseach, 2011; 18 (3):395-407. [Persian].