Rainwater harvesting for household use

Now days, water expenditure in households has increased due to the improper use of water in various activities such as: gardening, car washing or household cleaning. This causes water scarcity and an increase in household economic expenditure. In order to deal with this problem, a mathematical model was established, in which the amount of water collected during the year is calculated in order to carry out all the aforementioned activities, in which variables such as catchment area, Rainfall, expenditure on a house-room and the size of the tank. The calculations were made for a houseroom made up of five people, which gave us an expense of 600 liters per day (120 liters per person), liters of water distributed as follows: 240 WC, 120 shower, 60 clothes, 30 kitchen and 150 irrigation.