Implementação e estudo da aplicabilidade do modelo hidrológico DHSVM à micro-bacia representativa em mata atlântica, Jacarepaguá, Rio de Janeiro.

• Autor(a) principal: Luz Júnior, Willker Figueirêdo da
• Data de Publicação: 2016
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/11042
• topic: DHSVM; Exploratory analysis; Atlantic forest; Engenharia Ambiental; DHSVM; Análise exploratória; Mata Atlântica; Hidrologia; CNPQ::ENGENHARIAS

The forests provide important ecosystem services as they contribute to the thermal balance of the water, reducing the extremes of temperature and maintaining the oxygenation of the water environment, nutrient uptake by trees, shrubs and herbaceous plants avoiding excessive leaching of mineral soil salts into river streams and ensuring the availability of water by dampening events of floods and ensuring the maintenance water levels during dry weather periods. In Brazil the Atlantic Forest where about 120 million people lives, is one of the most threatened biomes, with only 8.5% of its initial coverage. Uncertainty about the effects of climate change on forests contributes to higher risks towards their preservation in the future. In this sense it is important to deeper understanding of hydrological processes for better water management and preservation of their remaining. This work appropriated methodological process for the Implementation and exploratory analysis of the applicability of DHSVM to an experimental small-scale catchment (2.55 km²) in Atlantic Forest located in the Pedra Branca State Park, Jacarepaguá, Rio de Janeiro. The methodology involved the acquisition of the computer code as well as the hydrological system documentation in the website of the University of Washington. It was also observed mailing lists, which the participation, facilitated the implementation and execution of the model tests. The model was implemented in the laboratory of hydrological studies of UERJ and an exploratory analysis was carried out. In addition to the tests available in the documentation, it was performed an uncertainty analyzes of the model design and of the small-scale catchment s database, object of the study. The exploratory analysis also involved a sensitivity study of model parameters. It was also carried out some calibration attempts and adjustment of the parameters. It was observed that the model is of high complexity and some uncertainties in its design were observed. In the data analysis, it was identified the need for prolonged observation of climatological and hydrological series, as well as the expansion of basic data on physical soil water parameters, which generated some uncertainties in the model calibration process. In the sensitivity analysis the field capacity parameter emerged as the most sensible among parameters studied. It was observed the need for further studies in order to improve the model s calibration and improve parameters physical identifiability. The continuation of studies with DHSVM model may allow studies of scenarios involving the analysis of the impact of climate change on conservation of the atlantic forest, as well as in the water distribution and availability.