Análise De Métodos De Interpolação Espacial Para Curvas Idf Da Bacia Hidrográfica Do Rio Madeira

Abstract

The maximum rainfall data result in several applications in the field of water resources engineering and can be used as a basis for the dimensioning of hydraulic works. Its spatialization and the realization of interpolation methods are of enormous importance for the Amazon, with many isolated areas that make it difficult to implement measurement tools. Thus, the objective of the research was to generate maps with the spatialization of intensity, duration and frequency (IDF) curves for the Madeira River basin, using the Bell methods together with the Inverse Distance Weighting (IDW) and Kriging (KRG). The results obtained by the IDW methods showed that there is the formation of "islands" in the spatialization maps. The maps interpolated by KRG showed greater smoothing in isohyets and more regular lines, allowing a better identification of intensity ranges. The KRG method presented, for the Madeira River basin, better interpolation results than the results presented by the IDW method, mainly in the identification of differences between return times and duration. It is concluded that performing the spatialization of IDF curve data in a hydrographic basin is a tool that can help in a better management of water resources, for the development of future works in regions where there is no monitoring of rainfall data.