Cost -Benefit Analysis Of Sustainable Rain Water Harvesting System Of A Residntial Building Of Dhanmondi Areaat Dhaka-1205

Abstract

The study was conducted to develop and analysis cost benefit analysis of rainwater harvesting system of a residential building project from different types of system. Also find the optimal quality of the rain water. Firstly we selected three rainwater harvesting system existing project in Dhaka city. After detailed analysis rainwater harvesting system (RHS) project at Dhanmondi, Dhaka a B+9 is seemed to be sustainable RHS. Water quality test of rain water and mixed ration of rainwater and tape water of pH value, Total dissolve solid, Conductivity and Chloride shows all values except chloride meet WHO guideline. Rain water thus needs to treat drinking purpose but it can be used for other purposes like toilet flushing, car washing etc