Feasibility of roof top rainwater harvesting potential - A case study of South Indian University

Rainwater harvesting system as a strategy for adaptation on climate change: A review

“…The RWH system can reach a reliability close to 100%, meaning that it can meet the total water demand [13], which depends on the size of the area where rainwater is captured; the amount of annual precipitation, which is why data from multi-year weather stations of each study area are generally used before implementing the collection system [19,20,21,22] and water demand to perform water balance and determine the reliability of a system [15].…”

“…In addition, it reduces greenhouse gas emissions by reducing energy consumption [31]. Within the components for the implementation of the system, the cost of the tank represents more than half [13], even up to 95%, of the total cost [22] and the replacement of materials 50% [15], so [12] recommend including recharge wells to increase groundwater as an economic solution.…”

“…[34] as can be seen in figure 2, where the uptake in roofs represents 70%. However, attention has been paid to the type of roofing material such as clay tiles, wood, corrugated steel sheets, cement, galvanized iron, concrete, fiber cement, aluminum, asbestos or zinc [16,22,35,36] due to the impact they have on water quality and the runoff coefficient of the material, which affects the amount of water that can be collected. Shaheed R. et al [37] determined that the highest quality water is collected from a steel roof, followed by an asphalt tile roof, galvanized iron and, finally, a concrete tile roof.…”

“…It is reported that rainwater quality parameter values hang on several factors, such as the number of dry days before precipitation [17,35,42,51,52], quality of the air and materials of the catchment system [31,37], but it is one of the alternatives that does not contain high levels of pollutants, so it does not need large treatment units [22,37,51]. According to the microbiological quality of rainwater, direct human consumption is not one of the recommended activities unless purifications are carried out [42].…”

“…According to the microbiological quality of rainwater, direct human consumption is not one of the recommended activities unless purifications are carried out [42]. Despite this, some of the physicochemical parameters that are evaluated may be within the standards for water for human consumption [22,41,48].…”