Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
Department of Watershed Management, Faculty of Natural Resources, Malayer University, Hamadan, Iran.
Environ Sci Pollut Res Int. 2021 Sep;28(36):49529-49540. doi: 10.1007/s11356-021-14098-9. Epub 2021 May 2.
In recent years, the occurrence of floods is one of the most important challenges facing in Hamadan city. In the absence/inefficiency of urban drainage systems, rainwater harvesting (RWH) systems as low-impact development (LID) methods can be considered as a measure to reduce the floods. In this study, three scenarios concerning the RWH from the roof surfaces are studied to evaluate the type of the harvested water on reducing flooding. In the first scenario, which indicates the current situation in the studied area, it is indicated that there is no harvest of the roof surfaces in the studied area. The second scenario is about the use of water harvested from the roof surfaces for household purposes. The third scenario also refers to the use of harvested water for irrigation of gardens. The simulation results of these three scenarios using the Soil Conservation Service (SCS) method in the Hydrologic Modeling System (HEC-HMS) model reveal that if the second scenario is implemented, the runoff volume decreases from 28 to 12% for the return period from 2 to 100 years. However, in the third scenario, this reduction in runoff volume will be 48 and 27% for return periods of 2 to 100 years, respectively. Therefore, the results of this study indicate that the use of harvested water can also affect the reduction on runoff volume.
近年来，洪水的发生是哈马丹市面临的最重要挑战之一。在城市排水系统不完善/效率低下的情况下，雨水收集（RWH）系统作为低影响开发（LID）方法，可以被视为减少洪水的一种措施。在这项研究中，研究了三种涉及屋顶表面雨水收集的情景，以评估收集的雨水在减少洪水中的作用。在第一种情景中，表明了研究区域的现状，表明研究区域的屋顶表面没有雨水收集。第二种情景是关于将屋顶表面收集的雨水用于家庭用途。第三种情景也涉及将收集的雨水用于灌溉花园。使用水文模型系统（HEC-HMS）中的土壤保护服务（SCS）方法对这三种情景进行模拟的结果表明，如果实施第二种情景，对于 2 至 100 年的重现期，径流量将减少 28%至 12%。然而，在第三种情景中，对于 2 至 100 年的重现期，径流量的减少将分别为 48%和 27%。因此，本研究的结果表明，收集的雨水的使用也会影响径流量的减少。
