ABSTRACT
The amount of residual rainwater that flows as runoff on the ground is known as surface runoff. With the development of urbanization, human encroachment on nature and the loss of vegetation, the infiltration of water into the ground has decreased and the possibility of flooding of cities has increased. On the other hand, due to the phenomenon of climate change, the possibility of heavy and short-term rainfall has increased, which can lead to urban floods and cause remarkable financial and human losses. Also, because of limited access to water resources, the use of new management methods such as green roofs, rainwater storage at homes, permeable surfaces, mulched areas, stormwater ponds, and infiltration trenches, further to qualitative and quantitative management of urban runoff, reduces the volume and peak of runoff and prevents the transfer of pollution and erosion to some extent. In this research, after introducing the abovementioned methods, the methods of rainwater harvesting and their use for irrigation are discussed in detail.
