Document Type : Research Paper
Authors
1 MSc, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
2 Professor, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
3 Associate Professor, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
4 -
Abstract
Urban watersheds due to their development, have more complex hydrological behavior than natural watersheds, and understanding their hydrological response will help to design appropriate flood control facilities. In this study, SWMM model was used to investigate the potential of urban runoff production in a part of Babolsar urban area. The purpose of this study was to analyze the water availability of rainwater collected during different return periods for urban use. For this purpose, the SWMM model defined 65.65 ha of study area in the form of six hydrological units (from 5.94 to 16.82 ha), six output nodes and four channels were defined, and the height of runoff from 24-hour rainfall was obtained with different return periods. According to these results, the 24-hour rainfall with a 25-year return period is 70.37 mm, of which 33.73 mm for infiltration and 35.60 mm for runoff. Results showed that about 52.1% of rainfall of Babolsar City plan could have the ability to become runoff. The highest runoff coefficient is in the hydrological unit S3, which has a value of 0.637 at the 100 year return period. However, the lowest runoff coefficient is in hydrological unit S1 which has a value of 0.352 at 2-year return period. The results also showed that the runoff coefficient is directly related to the return period and the larger rainfall has a higher runoff coefficient. Through the collection systems, in addition to reducing the flood hazards of Babolsar City, a water supplement that offsets part of household consumption in the non-urban sector, also water resources management can be done.
Keywords
- Belmeziti, A., O. Coutard and B.D. Gouvello. 2013. A new methodology for evaluating Potential for Potable Water Savings (PPWS) by using rainwater harvesting at the urban level: the case of the municipality of Colombes (Paris region). Water, 5(1): 312-326.
- Evenari, M., L. Shanan and N. l982. The Negev, the challenge of a desert. 2nd Edition, Harvard University Press, 464 pages.
- Mukheibir, P. 2008. Water resources management strategies for adaptation to climate-induced impacts in South Africa. Water Resources Management, 22: 1259-1276.
- Mehrabadi, M.H. and B. Saghafiyan. 2013. The optimization of reservoir levels in residential homes in the cities. 9th International Congress of Civil Engineering, University of Isfahan) in Persian).
- Mofidi, A., A. Zarin and Gh.R. Janbazeghobadi. 2008. Determining the synoptic pattern of severe winter precipitation and compare it with the pattern of severe precipitation on the southern shores of the Caspian Sea. First International Conference of Environmental Changes in the Caspian Region, Mazandaran (in Persian).
- Nix, S.J. 1994. Urban storm water modeling and simulation. Lewis Publishers, Boca Raton, 212 pages.
- Oni, S., I.E. Ege, Ch. Asenime and S.A. Oke. 2008. Rainwater harvesting potential for domestic water supply in Edo State. Journal of Management and Social Sciences, 2(2): 87-98.
- Pandey, D.N., A.K.G. Upta and D.M. Anderson. 2003. Rainwater harvesting as adaptation to climate change. Current Science, 85(1): 46-59.
- Parvanehkhah, R., M. Toloie and K. Siamardi. 2007. Application of direct rainwater harvesting system in urban environments. The 2nd Iranian National Conference on Applied Research in Water Resources, Zanjan) in Persian).
- Rostami Khalaj, M., M. Mahdavi, Sh. Khalighi Sigarodi and Salajaghe. 2012. Sensitivity analysis of the variables influencing the urban flooding using SWMM model. Journal of Watershed Management, 3(5): 12-23 )in Persian).
- Rutashobya, D.G. 2008. Climate change scenarios, impacts and adaptation strategies in Africa. In: Petermann, T. (Ed.), Towards Climate Change Adaptation, Building Adaptive Capacity in Managing African Transboundary River Basins, a Case Studies from African Practitioners and InWEht-Internationale Weiterbildung und Entwicklung gGmbH Capacity Building International, Germany. ISBN: 978-3-939394- 28-0.
- Salas, J.C., K.W.K. Nig and A. Lo. 2009. Rainwater harvesting providing adaptation opportunities to climate change. A Report Prepared for UNEP by Stockholm Environment Institute York, UK/Stockholm Resilience Centre, Stockholm, Sweden. ISBN: 978-92-807-3019-7.
- Telvari, A., M. Ghanbarpoor, N. Ghiasi, A. Abbasi and M. Arabkhedri. 2004. Investigation of rainfall characteristics in relation to flood estimation methods. Research Final Report, Soil Conservation and Watershed Management Research Institute, 98 pages (in Persian).
- Tripathi, A.K. and U.K. Pandey. 2005. Study of rainwater harvesting potential of Zura Village of Kutch District of Gujarat. Journal of Human Ecology, 18(1): 63-67.
- Yaziz, M.I., H. Gunting, N. Sapari and A.W. Ghazali. 1989. Variations in rainwater quality from roof catchments. Water Research, 23: 761-765.
- Younos, T. and S. Lawson. 2011. Rainwater harvesting: a holistic approach for sustainable water management in built environments. Extended Abstract, Low Impact Development Symposium, September 26-28, 2011, Philadelphia.
- Zaghloul, N.A. and B.L. Al-Mutairi. 2010. Water harvesting of urban runoff in Kuwait. Sharif University of Technology, 2010: 236-
- Zolfaghari, H. 2011. Take a look at ways to collect rainwater for domestic use. The 2nd Iranian National Conference on Applied Research in Ware Resources, Zanjan) in Persian).
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