Banca de QUALIFICAÇÃO: JEYMISON MARGADO BEZERRA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : JEYMISON MARGADO BEZERRA
DATE: 27/05/2020
TIME: 09:00
LOCAL: Vídeo conferência
TITLE:

EFFECT OF REFORESTATION ON THE HYDROCLIMATOLOGY OF TOCANTINS-ARAGUAIA RIVER BASIN


KEY WORDS:

Hydroclimatic Modeling; RegCM; Reforestation; Tocantins-Araguaia River Basin


PAGES: 73
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUBÁREA: Meteorologia
SPECIALTY: Meteorologia Aplicada
SUMMARY:

The changes related to deforestation and its impacts on climate and environment have been the subject of several studies in different areas of knowledge, which brings up the debate about the role of forests in the influence of hydrology, climate and ecosystem services. The reforestation by natural species opens space for the implementation of eco-hydrological services for human well-being, mechanisms for the management of watersheds and the adoption of mitigation measures. However, before embarking on reforestation activities, it is necessary to investigate its influence on regional climate and hydrology. The study area chosen for this investigation was the Tocantins River Basin, where its natural ecosystems have been reduced while it has expanded its agricultural areas. In recent times, numerical studies to verify the effect of vegetation cover have been carried out. However, these focused mainly on the validation of models and studies of processes and impacts of deforestation. The objective of this study is to quantify the impact of different reforestation activities on the hydroclimatology of the Tocantins River Basin, and thus to better understand the role of ecosystem conservation in the water and energy cycle at the basin scale. The investigation will be carried out from simulations with the Regional Climate Model (RegCM), widely used in climate studies on the effects of land use on the climate. The hydroclimatic database collection,  the model implementation for the hydrographic basin and its integration for 10 years have already been carried out. Preliminary results indicate that RegCM satisfactorily simulates the spatial and seasonal variability of precipitation and air temperature, with R² and PBIAS ranging from 0.81 to 0.97 and -7.3 to - 0.9%, respectively, calculated with different observations. The runoff was overestimated, although it followed the seasonality of the runoff observed, while evapotranspiration was underestimated and showed an almost constant pattern over the months. Although the model has presented limitations in the simulations of hydrological components, this situation will be solved with the improvement of the RegCM biosphere-atmosphere interaction module. It is hoped that this study will contribute to clarifying the benefits of maintaining ecosystems in providing water regulation and climate control services, and thus, contributing to the formulation of the best practices to mitigate the effects of deforestation on climate and hydrology.


BANKING MEMBERS:
Presidente - 2411669 - JONATHAN MOTA DA SILVA
Interno - 1752417 - CLAUDIO MOISES SANTOS E SILVA
Externa à Instituição - MARTA PEREIRA LLOPART - UNESP
Externa à Instituição - SANDRA ISAY SAAD - UFCG
Notícia cadastrada em: 19/05/2020 08:22
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