Banca de QUALIFICAÇÃO: THAÍS LOPES PINHEIRO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : THAÍS LOPES PINHEIRO
DATA : 06/09/2018
HORA: 14:00
LOCAL: Auditório da Eng. Ambiental (Sala 212 do CTEC)
TÍTULO:

CO2 AND CH4 FLUXES IN EXPOSED SEDIMENTS OF SEMI-ARID REGION RESERVOIRS AFTER EXPERIMENTAL SIMULATION OF FILLING

PALAVRAS-CHAVES:

Greenhouse gases. Prolonged drought. Artificial reservoirs. Sediment.

PÁGINAS: 17
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Sanitária
RESUMO:

Inland aquatic ecosystems (rivers, lakes and reservoirs) play a key role in the carbon (C) cycle, and may act as sinks of organic carbon or as sources of carbon dioxide (CO2) and methane (CH4) into the atmosphere, and the sediments of these compartments are active storage and mineralization sites of C. CO2 and CH4 are two of the main greenhouse gases (GHG), acting directly in the intensification of global warming and, consequently, climate change. Such climate changes have increased the frequency of extreme events (prolonged droughts and heavy rains) all over the world. The semi-arid regions, already naturally stressed by the low availability of water, go through profound changes in precipitation amounts. These alterations have compromised the operation of the reservoirs used for the multiple uses of the population due to the abrupt reduction of their volumes. With the occurrence of new rains, eventually, they are supposed to refill. Due to the large water level fluctuations that these reservoirs experience, the sediments of these compartments can be exposed. Considering that the fluctuation of the water level can affect the dynamics of the gases and that the reservoirs of the semi-arid regions are prone to the phenomena of water depletion and subsequent filling, the objective of this study is to analyze the effect of the drought (response of exposed sediments) to the emission of CO2 and CH4 after the filling of systems located in the semi-arid tropical region. The study will be conducted on an experimental scale in order to understand if long droughts caused by climate change attenuate or intensify the emission of greenhouse gases in the reservoirs when they are full again.

MEMBROS DA BANCA:
Externo ao Programa - 1639731 - ANDRE MEGALI AMADO
Interno - 052.716.174-83 - FABIANA OLIVEIRA DE ARAUJO SILVA - UFRN
Interno - 1177742 - RONALDO ANGELINI
Presidente - 1764855 - VANESSA BECKER