Abstract:
With climate change and economic and industrial development, accompanied by population
growth and improvement in the quality of life of populations, concerns arise regarding the
water deficit, because the demand for water has exceeded the supply capacity. Therefore, this
study aims to analyse the hydrological behaviour in the Lúrio river basin. For the study,
precipitation data from rain gauge stations, namely the Namapa and Nuite stations, located
along the Lúrio river basin area, were used. For data processing and analysis, geographic
information systems techniques were used. The results show that precipitation in the basin
area is quite irregular, presenting climatic seasonality, with two characteristic periods, the
rainy period from October to March and the dry period from April to September. The
different physical characteristics showed that the drainage area of the basin is 61.119,206
km 2 , the perimeter is 1.679,222 km, the compactness coefficient is 1,9, the shape factor is
0,23, the index circularity is 0,27, drainage density is 0,12 km/km 2 . The hierarchy of
watercourses is 4th order, the hypsometric amplitude was 2.080 m, with a higher elevation of
2.100 m and a lower elevation of 20 m. After analysing the results obtained, it was concluded
that the basin has an elongated shape, low drainage density, making it less susceptible to
flooding under normal precipitation conditions.
