AGNPS and SWAT Model Calibration for Hydrologic Modelling of an Ecuadorian River Basin under Data Scarcity

Chemical fate assessment in a river basin requires flow and sediment characterization that can be performed by continuous field measurements or modelling. Once this step is completed, the environmental modelling can be started. In current assessments done in Ecuador, field data are not easily available and are also scarce. Therefore, the use of models is a challenge. Two models, AGNPS and SWAT, were tested to evaluate their potential applicability under data scarcity. After gathering all necessary data, the models were calibrated from a hydrological point of view. Some inverse modelling techniques were applied to overcome the lack of necessary data. This paper shows the results of the hydrological calibration of both models.