| On average, 70 percent of the precipitation that reach Earth's surface, returns to the atmosphere through evapotranspiration, and this rate reaches 90 percent in arid areas. Meanwhile, watershed measures directly related to water, soil and plant, and ultimately to evapotranspiration on the natural resources region (ecochydrology). In this study, in order to study the effect of biological activities of watersheds (enhancement and increase of vegetation) on the process of soil moisture and evapotranspiration changes, paired watersheds of Taleghan, Alborz Province were selected. In order to calculate evapotranspiration by soil moisture balance method, soil moisture monitoring points were selected using field and laboratory studies in three main areas (northwest, eastern and southeast) and three replications and at three depths of 0-20, 40-20 and 40 -60 cm during plant growth period in 2017. Data were analyzed by ANOVA method, and Duncan test. The results showed that the actual evapotranspiration in the treated watershed and control watersheds were not statistically significant and, respectively, they showed 181 mm and 159 mm in a period of growth. In other words, the actual evapotranspiration value in the treated watershed was 14% higher than the control one during the growth period. Also, the results showed that evapotranspiration under different aspect slopes had a significant difference. The total actual evapotranspiration in the northwestern slopes were 229 and 226 mm, in east slopes were 207 and 171 and in the southeastern slopes were 109 and 80 mm in the treated and control watersheds, respectively. |
- Alizadeh, A., Gh. Kamali, M.J. Khanjani and M.R. Rahnavard. Evaluation of estimation methods of evapotranspiration in arid regions of Iran. Geographic Research, 19(2): 97-105 (in Persian).
- Black, C.A. 1965. Method of soil analysis, part 2, chemical and microbiological properties. American Society of Agronomy, Inc Publisher, Madison, Wisconsin, USA.
- Bahravifar, T., A. Sabzi Parvar and H. Nozari. Investigation of correlation relationship between reference evapotranspiration and evaporation data of class A in dry and wet conditions using with minimum meteorological data. MSc Thesis, Buali Sina University, 115 pages (in Persian).
- Bolhasani, K. and H. Zarei. 2016. Spatial estimation and zoning reference evapotranspiration using geostatistical methods and geographic information system, case study: Bakhtegan Basin. Journal of Water Science and Engineering, 6(13): 7-21.
- Ehsani, A., H. Arzani, M. Farahpur, H. Ahmadi, M. Jafari and M. Akbarzadeh. 2012. Evapotranspiration estimation using climatic data, plant characteristics and cropwat 8.0 software, case study: steppic region of Markazi Province, Roodshore Station. Iranian Journal of Range and Desert Research, 19(1): 1-16 (in Persian).
- Karimi Jafari, M. and S. Aslamian. 2012. Evaluation of geostatistical methods in estimating potential evapotranspiration. First National Conference on Meteorology and Agricultural Water Management, Campus of Agriculture and Natural Resources, University of Tehran (in Persian).
- Geroy, I.J., M.M. Gribb, H.P. Marshall, D.G. Chandler, S.G. Benner and J.P. McNamara. 2011. Aspect influences on soil water retention and storage. Hydrological Processes, 25(25): 3836-3842.
- Hanson, R.L. 1391. Evapotranspiration and droughts, in Paulson, R.W., E.B. Chase, R.S. Roberts and D.W. Moody, Compilers, National Water Summary 1988-89-Hydrologic Events and Floods and Droughts: U.S. Geological Survey Water-Supply Paper 2375, p. 99-104.
- Houérou. H.N.L. 2010. Restoration and rehabilitation of arid and semiarid Mediterranean ecosystems in North Africa and West Asia: a review. Arid Soil Research and Rehabilitation, 14: 3–14.
- Jian, Sh., Ch. Zhao, Sh. Fang and K. Yu. 2015. Effects of different vegetation restoration on soil water storage and water balance in the Chinese Loess Plateau. Agricultural and Forest Meteorology, 206: 85-96.
- Khaleghi, N. 2016. Comparison of effective rainfall estimation methods in agriculture. Journal of Water and Sustainable Development, 2(2): 51-58 (in Persian).
- Knapp, A.K., J.M. Blair, P.A. Fay, M.D. Smith, S.L. Collins and J.M. Briggs. 2005. Long-term responses of mezic grassland to manipulation of rainfall quantity and pattern. International Grass Land Congress, Ireland, United Kingdom.
- Lieberman, E.S. 2005. Nested analysis as a mixed-method strategy for comparative research. American Political Science Review, 99(3): 435-452.
- Lin, B.B. 2010. The role of agroforestry in reducing water loss through soil evaporation and crop transpiration in coffee agro ecosystems. Agriculture and Forest Meteorology, 150: 510-518.
- Mobasheri, M.R., H. Khavarian, P. Ziaeian and Gh. Kamali. 2005. Estimation of actual evapotranspiration using MODIS images and SEBAL algorithm, geomatics. National Mapping Agency, Tehran, 12 pages (in Persian).
- Paulo, A.A., R.D. Rosa and L.S. Pereira. 2012. Climate trends and behavior of drought indices based on precipitation and evapotranspiration in Portugal. Natural Hazards and Earth System Sciences, 12: 1481–1491.
- Piazza, A.D, F. Conti, F. Viola, E. Eccel and L.V. Noto. 2015. Comparative analysis of spatial interpolation methods in the mediterranean area: application to temperature in Sicily. Water, 7: 1866-1888.
- Rasoulzadeh, A. and M. Raoof. 2014. Principles and methods of irrigation. Second Edition, Amidi Publisher, 286 pages (in Persian).
- Santos, C., B. Bezerra, B. Silva and C. Neale. 2009. Assessment of daily actual evapotranspiration estimated by remote sensing algorithms. Anais XIV Simposio Brasileiro de Sensoriamento Remoto, 2: 427-434.
- Tromble, J.M. 1988. Water interception by two arid land shrubs. Arid Environment, 15: 65–70.
- Wang, X.P., Z.N. Wang, R. Berndtsson, Y.F. Zhang and Y.X. Pan. 2011. Desert shrub stream flow and its significance in soil moisture replenishment. Hydrological Earth System Science, 15: 561–567.
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