1. Abbasnejad A; Shahidokht A. 2013. Study of the vulnerability of Sirjan plan with attention to over extraction of groundwater. Geography and territorial spatial management. 3(7):85-96. 2. Alizadeh A. 2004. Principal of applied hydrology. 16th addition .Ferdowsi University of Mashhad. 816p.p 3. Assimacopolous, D,)2005( An Integrated Decision Support System for Evaluation of Water Management Strategies, http://environ.chemeny.ntua.gr. 4. Chitsazan, M., Saatsaz, M., 2005. Application of MOFLOW model in water resources management in Ramhormoz plain, Shahid chamran University Journal of science. 14 (1); 1-16 5. Dileep, K. Panda, Mishra, A., Jena, S.K., James, B.K. Kumar, A,)2007( The Influence of Drought and Anthropogenic Effects on Groundwater Levels in Orissa, India Journal of Hydrology .343: 140– 153. 6. Eslamian S. S; Nasri M; Rahimi N. 2009.Wet and Dry Periods and it's Effects on Water Resources Changes in Buin Plain Watershed. Geography and Environmental Planning. 33(1):79-90. 7. Ghafori S. 2003. Development of water resource management in Iran for drought management. 3th conference of water resources management in Iran. University of Tabriz. 8. Imani M, Talebi A. 2012. Study the eefects of drought on groundwater level change in Bahabad plain using GRI and SPI indexes.4th Iran Water Management Conference. AmirKabir University. Tehran. Iran 9. Khan, S., Gabriel, H.F., Rana, T, ) 2008(. Standard precipitation index to track drought and assess impact of rainfall on watertables in irrigation areas, IrrigDrainageSyst, 159–177, online at: Springer Science + Business Media B.V. 10. McKee, Thomas B., Doesken, Nolan J., Kleist, John, (1993) The relationship of drought frequency abd duration to time scales, Eighth Conference on Applied Climatology, Department of Atmospheric Science Colorado State University Fort Collins. 11. Mendicino, G., And Senatore, A, (2008). A Ground water resourse index (GRI) for drought motitoring and forecasting in a Mediterranean climate .j.of hydrology.357,282-302. 12. Naderiyanfar M; Ansari h: Ziyai A; Davari K. 2012. Evaluating the groundwater level fluctuations under different climatic conditions in the basin Neyshabour. Irrigation & Water Engineering. 3: 22-37. 13. Polemo, M., Casano, D, (2008) Climate Change, Drought and Ground water Availability in Southern Italy, Geological Society, London. special publication , 288: 39-51,doi:10.1144/SP2. 14. Rahimi D; Movahedi S; Barghi H.2009. Study of drought intensity using SPI ( A cas study; Systan and Blochestan Provence) . Geography and Environmental Planning. 36(3):43-56. 15. Shakiba, A., Mirbagheri, B., Khairi, A., 2010. Drought and its effects on groundwater resources in the East of Kermanshah Provence using SPI index. Geography. 8(25) : 104-124 16. Steinemann, A.C., Cavalcanti, L.F.N, (2006) Developing multiple indicators and triggers for drought plans. J. Water Resour. Plann. Manage. ASCE 132 (3), 164–174. 17. Talebi A; Imani M; Dastorani M. 2012. Study the effects of drought on groundwater level and hydrology of the subterranean canal in Bahabad. International symposium on traditional knowledge for water management. Yazd. Iran. 18. Ziya H. 2004. Hydrology of Birjand aquifer and its relationship with artificial water harvesting. M.S. thesis. Tabriz University.
)