Wateris the most necessary element of life. Although its covering the greater part of the earth, a tinny percent of its capacity is capable for human use. Human activity is putting an incredible strain on natural functions of the earth and it is mostly responsible for the disturbance of the hydrological cycle, the continuous circulation of water in the earth-atmosphere system.

 Water saving, is the first step that need to be taken for the prevention of this ecological disaster.At first it’s necessary to identify where and when, potable water is wastedand then to find ways of minimizing waste by using water efficiently.  

 Collecting and using water more than one time for tasks that drinking water quality is not required, can help reduce dependence on existing fresh water supplies.

 Rainwater, a primary source of water, can be collected from a catchment area and treated so that it can be capable for human use. The alternate water, that has been used one time and can be used a second time, even if it’s grey water (wastewater specifically from non-kitchen sinks, showers, baths and washing machines or laundry tubs)or black (water from any use) with little treatment could provide a new water supply that can be used for landscape irrigation, toilet flushing or as a way to limit human exposure to the water and the environment.

 Besides human consumption of water,it is essential to develop a more natural approach for designing open or semi-open urban spaces, by mimicking natural cycles and especially the hydrological cycle. This can be done by using appropriate plantsand materialsinopen spacesand by redesigning open air and roofs in a more sustainable way.

 Although the basic use of water is consumption, it is also can be used in designingoutdoor or indoor space,asa structural or an artistic element, or a way for human beings to be in state of thermal comfort.In conclusion, we need to change the way we use our freshwater and start designing for water as efficiently as possible.