Banca de DEFESA: LAUDELINE DANTAS SANTANA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LAUDELINE DANTAS SANTANA
DATE: 26/01/2023
TIME: 09:00
LOCAL: Garanhuns/PE- UFAPE
TITLE:

Spatial variability of physical-chemical attributes of soil and groundwater in areas of the Água Doce Program in Paraíba

KEY WORDS:

Salinity, water quality, lithology, semiarid

PAGES: 65
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Ciência do Solo
SPECIALTY: Manejo e Conservação do Solo
SUMMARY:

Environmental factors such as vegetation and soil types vary between regions depending on temperature, precipitation and lithology, thus constituting chemically different waters. The objective was to verify the space-time variability and to find relationships between the physicochemical properties of the soil and the quality of the water. The research was carried out in the state of Paraíba, in municipalities that are part of the Água Doce Program (PAD), an initiative of the Federal Government, which were, Amparo, Boa Vista, Caraúbas, Cubati, São João do Cariri, Soledade and Tenório, in the years 2018 to 2020, with two annual collections, corresponding to dry and rainy periods. Soil collection was performed only once in these municipalities. The variables analyzed in the water were electrical conductivity, pH, calcium hardness, magnesium hardness, total hardness, sodium, potassium, total iron, alkalinity in carbonates, alkalinity in bicarbonates, total alkalinity, sulfate, chloride, nitrate, nitrite, ammonia, Langelier saturation index, and total dissolved solids. In the soil, pH, sodium, phosphorus, potassium, calcium, magnesium and sand, silt and clay fractions were analyzed. Data were submitted to multivariate statistical analysis. A more expressive variation of electrical conductivity, sulfate and sodium was observed between the years studied, the municipalities of Boa Vista and Soledade presented high levels of electrical conductivity, sodium, chloride and total dissolved solids, far above the other municipalities, showing variability in space and over time of factors that influence water quality. As for the correlation of soil and water physical-chemical properties, there was a strong correlation between the total iron in the water and the potassium and pH of the soil, the fraction of sand showing a correlation only with the pH of the water. In view of this, it is likely that the water quality evaluated in these environments is more influenced by the lithology of the region than by the physical-chemical characteristics of the soil.

COMMITTEE MEMBERS:
Interno - ALBERICIO PEREIRA DE ANDRADE
Externo à Instituição - RISELANE DE ALCÂNTARA BRUNO - UFPB
Externo à Instituição - ROBERTO GERMANO COSTA