Carolina Cerqueira Barbosa , Maria do Carmo Calijuri , Phelipe da Silva Anjinho , André Cordeiro Alves dos Santos 

Itupararanga reservoir is a large reservoir built in the Southeast of Brazil to support multiple uses, mainly hydropower generation and drinking water supply for almost 1 million people. We applied a process-based biogeochemical model and a distributed basin load model to assess the responses of dissolved oxygen and nitrate concentrations in the Itupararanga reservoir based on three land use and land cover (LULC) scenarios. The proposed LULC management actions resulted in a set of diverse ecosystem responses of the Itupararanga reservoir and the biogeochemical model highlighted the impact of allochthonous nutrient loads on reservoir water quality conditions, as well as the overall low biogeochemical turnover in the Itupararanga reservoir. The proposed modeling framework is a coupling of open science tools, which can be used to estimate future changes in the water quality of standing freshwater bodies due to likely changes in the land use and land cover in watersheds.