Influência das diferentes formas de uso da terra em váriáveis limnológicas no arroio Tumurupará nos municípios de Cândido Godói, Ubiretama e Campina das Missões/RS.

Abstract

This study aimed to examine the land use, as well as its influence on the aquatic environment of the watershed of the Tumurupará stream, covering the municipalities of Cândido Godói, Ubiretama and Campina das Missões, Rio Grande do Sul, State. The methodology has been based on analysis of maps, hypsometric, slope and land use. It was used the computer programs: Spring 4.3 and Corel Draw12 . Similarly, the equipments used were: GPS (Global Position System), thermometer and in lab it was identified the variables pH, CE, TDS and Salinity. Besides, it was diagnosed the problems of the area under study in view of, the influence the agricultural sector operates in water was identified. In this understanding, the area under study had several problems about the environmental preservation, the presence of small areas where the land use is done so intensively with rudimentary techniques. This form of use is characterized predominantly for subsistence and its intensive uses the degradation of the environment. The limnological variables analyzed indicate changes in physical properties. It was collected seventeen (17) sampling points. Among the samples analyzed, the sample of point two (02) it is more critical, with high values and changes in the properties of water. The changes occur mainly on the salinity and electrical conductivity and total dissolved solids and in the sample of point (05) stands out the pH. On the land use map there is clearly a lack of vegetation, the presence of excessive farming, which influences the change of the natural way of the water. It is a necessary reflection and awareness of the population in alerts themselves of problems in the study area, and with the same search for a solution to minimize environmental impacts. The watershed is of fundamental importance for the local population, since the water supply of the population of the city of Campina das Missões comes from Tumurupará stream. Preserve the well spring requires incentives and awareness of the community in general. The preservation of these is essential, because the water is the source of life.