Banca de DEFESA: CARMEM JÚLIA SANT'ANNA DE OLIVEIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : CARMEM JÚLIA SANT'ANNA DE OLIVEIRA
DATA : 16/05/2019
HORA: 14:00
LOCAL: Sala 212 do CTEC/UFRN - Auditório da Engenharia Ambiental
TÍTULO:

PHOSPHORUS LOAD CAPACITY OF SIX RESERVOIRS IN THE BRAZILIAN SEMI-ARID REGION

PALAVRAS-CHAVES:

Eutrophication.  Phosphorus. Critical load.

PÁGINAS: 33
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Sanitária
RESUMO:

The excessive enrichment of water bodies by nutrients and the increase in primary production is a natural process that happens slowly, however, this process has occurred in recent decades quickly, due to the increase in the external load of anthropogenic nutrients. Since phosphorus is considered the limiting nutrient for phytoplankton growth in lakes and reservoirs, the best way to control the effects of eutrophication is to control the intake of this nutrient in the system. In order to reduce this entry, models have been developed to calculate the maximum load of phosphorus, that is, their load capacity, but most of the models used do not consider the temporal variation of the volume occurring in reservoirs and lakes of semiarid regions. Therefore, this study estimated maximum phosphorus loads for six reservoirs in the Brazilian semiarid region, from a mass balance coupled to a water balance. This load is the maximum so that in 90% of the simulation period the concentration of phosphorus in the reservoir was up to 30 mg/m³, which is the limit established by law (CONAMA Resolution 357/05) for freshwater, in the remainder of the time the concentration could exceed the limit established. Scenarios with three vertical flow of phosphorus, four water demands, three initial concentrations and two initial volumes were simulated. The results showed the strong influence of the parameters adopted for each scenario, highlighting the influence of the incorporation of the variation of volume levels in the reservoirs.

MEMBROS DA BANCA:
Externo à Instituição - ADRIANO ROLIM DA PAZ - UFPB
Presidente - 2190974 - JOANA DARC FREIRE DE MEDEIROS
Interno - 1362202 - JOSE LUIZ DE ATTAYDE
Interna - 1764855 - VANESSA BECKER