Trend in hydrological series and land use changes in a tropical basin at Northeast Brazil

Flow is one of the hydrological variables greatest interest due to its connection with water availability and multiple uses. However, in recent years this resource has been threatened by intense land use climate change, affecting patterns previously considered be stationary. The goal study was evaluate trends changes flow, precipitation, a basin located Brazilian Cerrado. 33 rainfall, fluviometric, data were used, covering period 1985 2018 on an annual scale. Mann-Kendall Sen Slope’s nonparametric test applied temporal series, as well Spearman Rho Pettit, which used analyze correlations between detect point change respectively. results show statistically significant flow reduction over time. At same time, considerable natural areas occurred, increase +750% agricultural areas. also that although tendency reduce precipitation detected, magnitude not significant, being main factor for negative Rio Grande tributary.