CAPACIDADE DE ARMAZENAMENTO DE RESERVATÓRIOS DE ÁGUA DOCE DERIVADOS DE DADOS SRTM E ALOS – PALSAR

Abstract

Freshwater reservoirs are essential sources of storage and supply; however, their quantification and volumetric characterization are neglected due to several factors. One way to monitor them is by using digital elevation models. Its reasonable accuracy makes the method reliable and cost-effective. Thus, the study aimed to identify and determine the storage capacity of reservoirs in the West Frontier region of Rio Grande do Sul through DEMs. The identification of the reservoirs occurred through the SRTM and ALOS – PALSAR data in the generation of the TIN (Irregular Triangular Network). Then, the volume and area values ​​of the reservoirs were estimated for their volumetric characterization. Once the spatial distribution of the reservoirs for the study area was established, the volumetric capacity, surface area, and depth data were transformed into logarithmic equations for validation through statistical analysis. The data derived from the TIN SRTM and TIN ALOS – PALSAR models demonstrate the potential of using these tools in the identification and characterization of reservoirs in a detailed and precise manner. The reliability of the area and volume estimation is also demonstrated by combining estimates of the extent of these reservoirs using radar data in relation to area, volume, and depth.