Evaluation of the impacts of past watershed projects provides useful insights for future projects. In this study, the hydrology and water resources status of Akujan Catchment of Qazvin Province has been the object of the study in which the effects of various measures of watershed managements were evaluated. For this purpose, the changes of water resources discharge, increased infiltration, water storage, peaks and volumes of catchment floods, were compared before and after the implementation of watershed management projects. Results showed that 114000 m3 more runoff storage has been carried out by watershed management operations that 20.1% of this volume was related to the structural operations and 79.9% of it was due to biological and biomechanical projects of the catchment. Results of the flood analysis indicated that the role of structural measures in the change of time of concentration is low and even negative. Therefore the reduction of the peak flow and flood volume at the outlet of the catchment is due to the implementation of biological and biomechanical measures which reduces the peak flows by 42.7, 25.4, 20.8, 17.1, 15.3 and 13.8% and flood volumes by 41.8, 24.8, 20.2, 16.5, 14.8 and 13.3% respectively for the return periods of two, five, 10, 25, 50 and 100 years. Another observation is that the effect of watershed management practices on the reduction of flood peak and volume decreases when the return period of flood is increased. |
- Ahmadi, H. 2007. Monitoring and evaluation process is important in the sustainable management of the watershed. Proceedings of the Fourth National Conference on Science and Watershed Engineering, Tehran (in Persian).
- Amini, A. and Roghani. 2014. The effects of check dams on runoff storage in Gav-Darreh Watershed, Kurdistan, Iran. Geographic Space, 14(47): 145-162 (in Persian).
- Azmodeh, A., M. Zarei, H. Rahnama and H. Amirnejad. 2010. Stakeholder approach towards watershed management projects carried out in the Brnjstanyk Watershed Dam. Proceedings of the 6th National Conference on Science and Engineering, Tehran (in Persian).
- Department of soil and water conservation engineering (SWCE), G.B.P.U.A and T. 1997. Evaluation of soil and water conservation measure. 250 pages.
- Forests, Ranges and Watershed Management Organization. 2017. Evaluation of the effects of watershed management measures in Parrud Watershed. Office of Engineering and Studies, Volume 2, 53 pages.
- Hayashi, S., S. Murakami, K. Xu and M. Watanabe. 2008. Effect of TGP Dam on flood control in Dongting Lake area. Research, 2(3): 148-163.
- Ildoromi, A. and M. Dashti Marvili. 2014. Quantitative evaluation of watershed management measures in Ekbatan Dam Watershed. Iran Watershed Management Science and Engineering, 7(23): 63-66 (in Persian).
- Kabir, A., A. Najafi Nejad, Y. Hemmatzadeh and M. Corkinejad. 2007. Time to focus on the establishment of structural reform (Golestan Watershed Roudbar Gheshlagh). Journal of Gorgan University of Agricultural Sciences and Natural Resources, 14: 1-7 (in Persian).
- Kamali, M., K. Solaimani, K. Shahedi, A. Noshahri and A. Gomrokchi. 2015. Determining the flooding points and prioritizing sub-catchments of Barajin Catchment of Qazvin using Hec-HMS and GIS. Iran Watershed Management Science and Engineering, 9(29): 27-34 (in Persian).
- Kerr, J. and K. Chung. 2002. Evaluating watershed management projects. Journal of Water Policy, 3(6): 537-554.
- Meyjani, K., M. Shahsavari and A. Pouraboli. 2001. Evaluation of the results of watershed operations in Kerman Province. Proceedings of the First Conference on Watershed Management and Water Management in the Watershed, Tehran, 95-101 (in Persian).
- Mikaeilzade, H., A. Talebi Karimian and A. Mokhtari. 2014. Evaluation of the effects of watershed management projects (mechanical and biologic) on runoff using HEC-HMS model, case study: Nahand Watershed. MSc Thesis, Yazd University, 145 pages (in Persian).
- Moghaddasi, N., V.B. Sheikh and A. Najafinejad. 2015. Qualitative evaluation of watershed management projects using descriptive-correlation method, case study: Boostan Dam Watershed. Journal of Water and Soil Conservation, 22(2): 205-218 (in Persian).
- Mohammadi, M.A., M. Zarea Khormizi and A. Kavian. 2015. Storm-wise analysis of hydro-sedimentary response of Khamsan Watershed. Journal of Water and Soil Science, 19(72): 115-125 (in Persian).
- Mosaffaie, J. and A. Salehpour Jam. 2018. Economic assessment of the investment in soil and water conservation projects of watershed management. Arabian Journal of Geosciences, DOI: 10.1007/s12517-018-3706-0.
- Mosaffaie, J., M.R. Ekhtesasi, M.T. Dastorani, H.R. Azimzadeh and M.A. Zare Chahuki. 2015. Temporal and spatial variation of the water erosion rate. Arabian Journal of Geosciences, 8: 5971–5979.
- Mosaffaie, J. 2015. Comparison of two methods of regional flood frequency analysis by using L-moments. Water Resources, 42(3): 313-321.
- Mosaffaie, J. 2016. Application of artificial neural network, multiple-regression and index-flood techniques in regional flood frequency estimation. International Journal of Water, 10(4): 328-342.
- Mostafazadeh, R., A. Sadoddin, A. Bahremand, V. Sheikh and H. Nazarnejad. 2010. Assessing hydrological effects of Jafar-Abad watershed management project in Golestan Province using HEC-HMS model. Journal of Watershed Engineering and Management, 2(2): 83-93 (in Persian).
- Nourali, M. and B. Ghahraman. 2016. Assessment of watershed management projects on flood hydrograph using HEC-HMS model, case study: Goosh-Bahreh Watershed. Journal of Watershed Management Research, 7(13): 60-71 (in Persian).
- Radwan, A. 1999. Flood analysis and mitigation for an area in Jordan. Journal of Water Resources and Management, 125(3): 170-177.
- Rajora, R. 1998. Integrated watershed management, a field manual for equitable, productive and sustainable development. Rawat Publication, New Delhi, India, 616 pages.
- Roghani, M. 2012. Surveying the mechanical implementation roles in runoff controlling on the watershed, case study in Hydarie Catchment. Iranian Journal of Irrigation and Water Engineering, 2(7): 11-23 (in Persian).
- Sadeghi, S.H.R., F. Sharifi, A. Foorootan and M. Rezaei. 2004. Quantitative evaluation of watershed management practices, case study: Keshar sub-watersheds. Journal of Research and Development, 65: 96-102 (in Persian).
- Sreedevi, T., S. Wani, R. Sudi, M. Patel, T. Jayesh, S. Singh and S. Tushar. 2006. On-site and off-site impact of watershed development, a case study of Rajasamadhiyala, Gujarat, India. Global Theme on Agro Ecosystems Report No. 20, Patancheru 502 324, Andhra, 52 pages.
- Suraj, B. 2013. Land degradation and integrated watershed management in India. International Soil and Water Conservation Research, 1(1): 49-57.
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