Document Type : Research Paper
Authors
1 PhD Student, Synoptic Climatology, Faculty of Human Science, University of Mohaghegh Ardabili, Iran
2 Professor, Faculty of Human Science, University of Mohaghegh Ardabili, Iran
3 Assistant Professor, Soil Conservation and Watershed Management Research Institute (SCWMRI), Agricultural Research, Education and Extension Organization (AREEO), Iran
Abstract
Climate change is an effective phenomenon on many natural processes, including hydrologic cycle. The evapotranspiration as one of the parts of the hydrologic cycle will be at the forefront of these changes. Due to the importance of evapotranspiration in water resources management and agricultural planning, the present study was conducted to investigate the effect of climate change on this parameter in Moghan Plain. For this purpose, the HadGEM2 atmospheric and oceanic circulation model was used under RCPS and Lars-WG6 downscaling in 2011-2030 and 2030-2060 periods. Also, Penman-Monteith and Hargreaves-Samani methods were used to calculate evapotranspiration. This study showed an increase of 6 to 8.4% of calculated evapotranspiration with Penman-Monteith method in each of the scenarios in 2030-2011 and 2030-2060 periods compared to the observed years. Also, calculated evapotranspiration of the Hargreaves-Samani method will increase from 4.5 to 7.7% in each scenario in 2030-2011 and 2030-2030 periods compared to the observation years. These increases affects on water demands of Moghan and Khodafarin irrigation and drainage networks in the maximum months, which requires appropriate solutions to adapt to climate change conditions.
Keywords
- Akhavan, S., Ghabaei Sough and A. Mosaedi. 2016. Investigation of the effect of climate change on net irrigation requirement of main crops of Hamadan-Bahar Plain using LARS-WG downscaling model. Journal of Water and Soil Conservation, 22(4): 25-46 (in Persian).
- Alizadeh, A. 2005. Principles of applied hydrological. Astan Quds Razavi, Mashhad, 807 pages (in Persian).
- Babaeian, I. and Kouhi. 2012. Agro climatic indices assessment over some selected weather stations of Khorasan Razavi Province under climate change scenarios. Journal of Water and Soil, 26(4): 953-967 (in Persian).
- Babaeian, I., Najafinik, F. Abbasi, M. Habibi Nohandan, H. Adab and Sh. Malbousi. 2009. Assessment of the country's climate change in the period 2010-2039, using the finer scale of the data of the general circulation of atmosphere. Geography Magazine and Developmental, 16: 152-132 (in Persian).
- Bormann, B. 2011. Sensitivity analysis of 18 different potential evapotranspiration models to observed climatic change at German climate stations. Climatic Change, 104(3–4): 729–753.
- Allen, R.G., S. Pereira, D. Raes and M. Smith. 1998. Crop evapotranspiration-Guidelines for computing crop water requirements. FAO Irrigation and Drainage, No.56.
- Daneshfaraz, R. and Razzaghpour. 2014. Assessment of climate change effects on potential evapotranspiration in West Azarbaijan Province, Iran. Journal of Geographic Space, Azad University of Ahar, 14(46): 323-333 (in Persian).
- Goudarzi, M., B Salahi and A. Hosseini. 2018. Estimation of evapotranspiration rate due to climate change in the Urmia Lake Basin, Iran. Journal of Watershed Management Science and Engineering, 13(41): 1-12 (in Persian).
- Goyal, R.K. 2004. Sensitivity of evapotranspiration to global warming: a case study of arid zone of
Rajasthan (India). Agricultural Water Management, 69: 1–11. - Hargreaves, G.H. and Samani. 1985. Reference crop evapotranspiration from ambient air temperature. Applied Engineering in Agriculture, 1(2): 96-99.
- Houerou, H.N. 1993. Changements climatiques et d ́esertisation. Secheresse, 4: 95-111.
- 2007. Summary for policymakers climate change: the physical science basis. Contribution of Working Group I to the Forth Assessment Report. Cambridge University Press, 881 pages.
- 2014. Climate change 2014: Synthesis report. Contribution of Working Groups I, II and III to
the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, IPCC, Geneva, Switzerland, 151 pages. - Jahanbani, H., T. Shui, A.M. Bavani and A.H. Ghazali. 2011. Uncertainty of climate change and its impact on reference evapotranspiration in Rasht City, Iran. Journal of Water Climate Change, 2(1): 72–83.
- Mehrazar, A., Massah Bavani, M. Mashal and H. Rahimikhoob. 2018. Assessment of climate change impacts on agriculture of the Hashtgerd Plain with emphasis of AR5 models uncertainty. Irrigation Sciences and Engineering, 41(3): 45-59 (in Persian).
- Pouryazdankhah, H., Razavipour, M.R. Khaledian and M. Rezaei. 2012. Determining proper methods to estimate the reference evapotransiration in Rasht region. Third National Conference on Integrated Water Resource Management, University of Agricultural Sciences and Natural Resources, 11 pages (in Persian).
- Rasouli, A., Rezaei-Banafsheh, A. Massah, R. Khorshiddoust and B. Ghermezcheshmeh. 2014. Investigation impact of morpho-climatic parameters on accuracy of LARS-WG Model. Iranian Journal of Watershed Management Science and Engineering, 8(24): 9-19 (in Persian).
- Sabziparvar, A.A. and Tabari. 2010. Regional estimation of reference evapotranspiration in arid and semi-arid regions. Journal of Irrigation and Drainage Engineering, 136(10): 724–731.
- Semenov, M.A. and P. Stratonovitch. 2010. The 16 use of multi-model ensembles from global climate models for assessment of climate change impacts. Climate Research, 41: 114-135.
- Wilby, R.L., M.L. Wigley, D. Conway, P.D. Jones, B.C. Hewitson, J. Main and D.S. Wilks. 1998. Statistical downscaling of general circulation model output: a comparison of methods. Water Resources Research, 34: 2995–3008.
- Yaghoobzadeh, M., Ahmadi and B. Salahi. 2016. The effect of climate change on evapotranspiration changes during the growth period, plants of water and water fields using AOGCM models. Water Research in Agriculture, 30(4): 22-35 (in Persian).
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