Water Scarcity Index Calculation, Atlas Animas, Tecoanapa Municipality, Guerrero, Mexico

Water consumption is a problem, as it is used inefficiently, besides that, the demand is growing much faster than nature can supply, so in the present study an analysis was conducted to determine the amounts of water used in domestic and agricultural activities in a rural town, that allows us to obtain the water shortage index. To define and know the different uses, a survey of people’s perception of household water expenditure is used, both personal hygiene and at home, as well as the use in agricultural activities. Then, the water shortage index is calculated with the model IDEAM (Hydrology, Meteorology and Environmental Studies Institute) modified by Romero and Ortiz (2016), which was adapted to a rural area. The agricultural and domestic activities need 868, 500, 660 L/ha, equivalent to 72.8 % of the total water rains in the study area and, the amount that is not used is 344,982,477 L/ha, what represents the 27.2 % of the total 100 %, the latter is for the recharges of wellsprings to feed the micro-basin, representing problems of water scarcity.