Banca de DEFESA: ESTEPHANIA SILVA JOVINO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ESTEPHANIA SILVA JOVINO
DATE: 27/07/2021
TIME: 08:30
LOCAL: videoconferência
TITLE:

Spatiotemporal changes in land use affect sediment production simulation in a subtropical basin drainage

KEY WORDS:

Soil use; Erosion; Water balance; SWAT 

PAGES: 49
BIG AREA: Engenharias
AREA: Engenharia Sanitária
SUMMARY:

The change of natural landscapes by anthropic activities is the main reason for the deepening of erosion, negatively affecting natural resources in a general way. In this context, it is necessary to know the processes that determine the hydrological balance to avoid erosion. Due to the complexity of a basin and the necessity of making predictions, the development of mathematical models is essential to decision making. These tools, when integrated into a Geographic Information System (GIS), can couple the space-time modeling in a single quantitative structure. Among the existing models, the SWAT (Soil and Water Assessment Tool) model can integrate the GIS technics with water balance equations, becoming one of the most utilized models in the world for different purposes. The objective of this study is to evaluate the hydrological response and quantify the soil loss in a basin (Ribeirão do Feijão, in Brazilian southeast), using the SWAT + model. The simulation was performed by dividing the basin into 31 sub-basins and assigning multiple HRU. The metrics used to analyze the efficiency of the model indicates that the results were satisfactory, NSE = 0.53 and 0.54 for calibration and validation of the flow, respectively. The other metrics used represented a good response, demonstrating that the observed data and the model being simulated well correlated and follow similar patterns. For the production of sediments in the watershed Ribeirão do Feijão Basin, using the current scenario, with increased presence of vegetation and reforestation, the results indicated a low production of sediments in most of the channels present in the basin. Calibration was not performed for sediments due to lack of monitoring data. The model represented in this study can help guide future planning for the use and occupation of the basin, enabling the forecast of different scenarios and their possible impacts on water production. 

BANKING MEMBERS:
Interno - 3060504 - CARLOS WILMER COSTA
Externa à Instituição - DANIELLE DE ALMEIDA BRESSIANI - UFPel
Interna - 1662859 - KARINA PATRICIA VIEIRA DA CUNHA
Presidente - 1177742 - RONALDO ANGELINI