عنوان مقاله [English]
Introduction:Iran is facing shortage of water resources due to the climate in which it is located. Since large areas of urban surfaces are Impenetrable streets, the volume of water harvested from these surfaces is significant and can reduce the pressure on water resources and meet a large portion of the non-potable demands, it also prevents the spread of pollution caused by overflows and backlogs in surface water collection facilities and uneconomic increase of their volumes.
Materials and Methods:In this paper, the design of rainwater harvesting system from asphalt surfaces was carried out with the aim of meeting part of the green space demand of Tarbiat Modares University faculty of agriculture, using drone images. For this purpose, available data of 22 years of daily precipitation and 761 aerial images were obtained using DJI Phantom3 Professional drone. Then, the digital elevation map of the case study was prepared and to determine the runoff direction, the basin of the area was carried out in the GIS. Reliability percentage and overflow ratios of the tanks were estimated for each level for different tank volumes. Then the optimal volume of each tank was determined using genetic algorithm.
Findings:The results showed that due to the topographic status of the faculty street surfaces, the runoff from them could not be collected in one tank, so 4 tanks A, B, C and D with optimized volumes of 6.15, 3.46, 1 and 20 cubic meters were considered in different parts of the street surfaces, respectively.
Conclusion:With designing rainwater harvesting systems, a significant amount of rainwater can be stored for non-potable consumption.
applications. Hydrologic Engineering. 2007; 12: 197-205.
10. Imteaz MA, Matos C, Shanableh A. Impacts of climatic variability on rainwater tank outcomes for an inland city, Canberra. Hydrology Science and Technology. 2014; 4:177-191.
11. Jing X, Zhang S, Zhang J, Wang Y, Wang Y. Assessing efficiency and economic viability of rainwater harvesting systems for meeting non-potable water demands in four climatic zones of china. Resources, Conservation and Recycling. 2017; 126:74-85.
12. Jones MP, Hunt WF. Performance of rainwater harvesting systems in the southeastern United States. Resources, Conservation and Recycling. 2010; 54:623-629.
13. Kim K, Yoo C. Hydrological modeling and evaluation of rainwater harvesting facilities: case study on several rainwater harvesting facilities in Korea. Hydrologic Engineering. 2009; 14:545-561.
14. Lani NHM, Syafiuddin A, Yusop Z, Bin Mat Amin MZ. Performance of small and large scales rainwater harvesting systems in commercial buildings under different reliability and future water tariff scenarios. Science of the total Environment. 2018; 636:1171-1179.
15. Li Y, Ye Q, Liu A, Meng F, Zhang W, Xiong W, Wang P, Wang C. Seeking urbanization security and sustainability: Multi-objective optimization of rainwater harvesting systems in China. Hydrology. 2017; 550:42-53.
16. Liaw CH, Tsai Yl. Optimum storage volume of rooftop rain water harvesting systems for domestic use 1. The American Water Resources Association. 2004; 40:901-912.
17. Mehrabadi MHR, Saghafian B, Fashi F. Assessment of residential rainwater harvesting efficiency for meeting non-potable water demands in three climate conditions. Resources, Conservation and Recycling. 2013; 73:86-93.
18. Mun JS, Han MY. Design and operational parameters of a rooftop rainwater harvesting system:definition, sensitivity and verification. Environmental Management. 2012; 93:147-153.
19. Rahman A, keane J, Imteaz MA. Rainwater harvesting in greater Sydney: water savings, reliability and economic benefits. Resources, Conservation and Recycling. 2012; 61:16-21.
20. Rostad N, Foti R, Montalto FA. Harvesting rooftop runoff to flu sh
lets: Drawing conclusions from four major US cities. Resources, Conservation and Recycling. 2016; 108:97-106.
21. Sample DJ, Liu J. Optimizing rainwater harvesting systems for the dual purposes of water supply and runoff capture. Cleaner Production. 2014; 75:174-194.
22. Walsh TC, Pomeroy CA, Burian SJ. Hydrologic modeling analysis of a passive, residential rainwater harvesting program in an urbanized, semi-arid watershed. Hydrology. 2014; 508:240-253.
23. Wang R, Zimmerman JB. Economic and environmental assessment of office building rainwater harvesting systems in various US cities. Environmental Science and Technology. 2015; 49:1768-1778.