GEOSPATIALIZATION OF INDEXES: WATER, ARIDITY AND MOISTURE AND IN THE IPOJUCA RIVER WATERSHED

Abstract

The indexes: water, aridity and humidity have as purpose the climatic distinction of an area.  The objective is to calculate the Water Balance and analyze its indices: humidity, water and aridity in addition to deficiencies and water surpluses from 1962 to 2019 for the ipojuca river hydrography basin and its surroundings, seeking to ascertain possible changes. The water balance was carried out following the methodology of Thornthwaite and Mather, through the computer program Normal Water Balance using an electronic spreadsheet. The aridity rates in the central region of the basin are strong to moderate, surpassing the values set for desertification. In the humidity index there were reductions in the Zona da Mata region and in the upper Ipojuca River. Significant reductions in some municipalities were recorded in moisture indices. Water deficiencies oscillate when it reduces the water capacity available in the soil, becoming notorious in some municipalities, while water surpluses depend exclusively on inhibitory or rain-causing factors in the studied area.