Banca de DEFESA: DOUGLAS LEONARDO SALES PEDROSA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : DOUGLAS LEONARDO SALES PEDROSA
DATE: 21/02/2022
TIME: 14:00
LOCAL: Videoconferência
TITLE:

ANALYSIS OF FLOW EXTREMES IN THE MUNDAÚ RIVER AND ASSOCIATED SYNOTIC SYSTEMS IN THE PERIOD FROM 1990 TO 2019

KEY WORDS:

extreme flow, synoptic systems, mundaú river, disturbance of trades winds.

PAGES: 72
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUBÁREA: Meteorologia
SUMMARY:

This study aimed to analyze extreme flow events in the Mundaú River and identify the synoptic scale systems that directly influenced these cases, between the years 1990 to 2019. For this analysis, daily flow data from the Agência Nacional de Águas (ANA) for four fluviometric stations located in the cities of Murici; Rio Largo; Santana do Mundaú and União dos Palmares, and with these data the percentile technique was applied, and then a value equal to or greater than the 95th percentile was considered an extreme flow event. With these values, 19 cases were identified where the flow was considered extreme in at least one fluviometric station. Soon after, the systems that acted in the region of the River Mundaú Watershed (RMW) were identified, through the data of the ECMWF model in 10 levels of the atmosphere and satellite images. The year 2000 was the year with the highest number of occurrences of extreme flow (03), which represents 16% of the total. Dividing the three decades, from 1990 to 1999 it concentrated 31.5% of the events, from 2000 to 2009, 52.5%, and from 2010 to 2019, 16%. Extreme flow events in the Mundaú River had a concentrated distribution between the months of autumn and winter, with the months of June (9) and August (4) showing the highest number of cases within the series. As for the systems that were identified, 15 cases with Wave Disturbance of Trades Winds (WDTW); 2 with Upper Tropospheric Cyclonic Vortices (UTCV) and 2 with Tropical Waves (TW).

BANKING MEMBERS:
Interna - 1653612 - MARIA LUCIENE DIAS DE MELO
Externo à Instituição - MIKAEL TIMÓTEO RODRIGUES
Externo à Instituição - RANIERI CARLOS FERREIRA AMORIM - F.M.Nassau
Presidente - 1349968 - RICARDO FERREIRA CARLOS DE AMORIM