Avaliação da hidrodinâmica do Açude Olho D´Água, no Ceará

Abstract

Water is a vital resource for people's quality of life and plays a strategic role in sustainable development. In the semiarid region of northeastern Brazil, reservoirs aim to ensure water security and mitigate the effects of drought during dry spells; consequently, monitoring them is of utmost importance. This study seeks to apply hydrodynamic modeling to the Olho D’Água reservoir, located in the municipality of Várzea Alegre, Ceará, using the CE-QUAL-W2 software a two-dimensional (longitudinal-vertical) model. The methodology employed input data and the FLOWQUAL application, both provided by FUNCEME; FLOWQUAL, developed to operate in the R language, assisted in the calibration and validation of parameters within the CE-QUAL-W2 software. Meteorological data from INMET including air temperature (°C), dew point temperature (°C), cloud cover, wind speed (m/s), and wind direction (degrees) were also utilized, alongside reservoir bathymetry. Calibration and validation were performed using a historical dataset spanning 2016 to 2021. Simulation 12 (Type 1) yielded the best results for RMSE, MAE, Bias, and NSE metrics regarding temperature and evaporation variables; however, the values obtained for the water level variable were relatively high, indicating inconsistencies in the water balance. This necessitates a future review and a re-run of the simulations.