Caracterização hidrogeológica da Bacia do Ribeirão Sobradinho - Brasília (DF)

Zoby, José Luiz Gomes; Duarte, Uriel

doi:10.5327/s1519-874x2001000100006

Cited by 5 publications

(9 citation statements)

References 2 publications

(3 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For areas with sandy saprolites, developed on sandy metarythmite and quartzite, groundwater recharge will be rather high. In contrast, low groundwater recharge might be found in areas with fine-grained saprolites (Zoby and Duarte 2001).…”

Section: Effects On Water Resourcesmentioning

confidence: 96%

“…1 m) and has low hydraulic conductivities of 6.1 9 10 -5 to 1.2 9 10 -5 m s -1 (Souza and Campos 2001). Average groundwater recharge in DF is estimated to be around 28% of annual precipitation (Zoby and Duarte 2001). Recharge rates for the fractured domains depend mostly on thickness and properties of the regolith cover.…”

Section: Effects On Water Resourcesmentioning

confidence: 99%

“…Araxa´/Bambuı´complex, Canastra complex and Paranoa´complex, most of surface geology of the DF comprises weathering mantles (regolith/saprolite) (Zoby and Duarte 2001), which act as porous aquifer system for shallow groundwaters (Campos 2004 saprolite varies between several cm to [80 m (Campos 2004). The porous domain can be divided into four aquifer systems (P 1 , P 2 , P 3 , and P 4 ).…”

Section: Effects On Water Resourcesmentioning

confidence: 99%

See 2 more Smart Citations

Challenges of an integrated water resource management for the Distrito Federal, Western Central Brazil: climate, land-use and water resources

et al. 2011

View full text Add to dashboard Cite

Land-use/cover change (LUCC) and climate change are major controlling factors for water resources in the Distrito Federal in Western Central Brazil. Dynamic LUCC in the region has severe impacts on water resources, while climate changes during the last three decades is thought to have only moderate effects. LUCC affects water quantity mostly during base flow conditions. River basins with substantial expansion of agriculture since the end 1970s show a dramatic decrease of base flow discharge by 40-70%, presumably due to irrigation. In contrast, the effects of urbanization on runoff are less distinct, since factors controlling runoff generation might be more variable. For water quality, we found urban areas to have a strong influence on the parameters CSB, NH 4 ? , and suspended solids. In addition, we assume emerging pollutants, e.g. organic (micro)pollutants, might play a major role in the future. The project IWAS-Á GUA DF focuses on creating the scientific base to face these problems in frame of an IWRM concept for the region. Results of our study will be a contribution to an IRWM concept for the Distrito Federal and will help to maintain high standards in water supply for the region.

show abstract

Section: Effects On Water Resourcesmentioning

confidence: 96%

Section: Effects On Water Resourcesmentioning

confidence: 99%

Section: Effects On Water Resourcesmentioning

confidence: 99%

See 1 more Smart Citation

Challenges of an integrated water resource management for the Distrito Federal, Western Central Brazil: climate, land-use and water resources

et al. 2011

View full text Add to dashboard Cite

show abstract

“…It presents an altimetry amplitude of approximately 350m and average annual temperature around 22°C. In relation to land use and occupation, this region is marked by intense subdivision, which has increased significantly since the 1990s (Zoby and Duarte, 2001). Sarandi Stream is a tributary Ana Luiza Litz Passos et al of the right bank of the Mestre d'Armas River, both belonging to the Hydrographic Unit of the Upper São Bartolomeu River, located in the north of the Federal District, with a drainage area of approximately 30 km 2 .…”

Section: Study Areas and Sample Collectionmentioning

confidence: 99%

Selection of variables in the definition of a water quality index for the Brazilian Federal District

Passos¹,

Muniz²,

Rangel³

et al. 2019

Rev. ambiente água

View full text Add to dashboard Cite

Water Quality Indices (WQIs) are based on a small number of variables that establish categories for water quality. This method presents some problems with the evaluations, since WQIs do not consider the multiple uses of the water or differences in regional characteristics. The present study proposes a regional and more appropriate variable group for the definition of a Water Quality Index for the Brazilian Federal District, based on water quality monitoring of surface waters in the region. The monitoring was carried out monthly between August 2016 and July 2017, at three points on the Jardim River, Sobradinho Stream and Sarandi Stream, where 21 variables were evaluated. Among physical-chemical and microbiological analyses, the regional characteristics of these water bodies were noted, as well as their differences, and the main anthropogenic interferences that generate changes in water quality. In the urban area, the disposal of treated sewage from the wastewater treatment plant of Sobradinho was highlighted as the main anthropic interference, and agricultural activities stood out in the rural region of the study area. The impacts in the urbanized area were of greater weight. Thus, based on the results of the Principal Component Analysis (PCA), two groups of variables were selected, one representative of urban areas and the other of rural areas, to compose two probable water quality indices (WQIs) for the Federal District.

show abstract

“…It presents an altimetry amplitude of approximately 350m and average annual temperature around 22°C. In relation to land use and occupation, this region is marked by intense subdivision, which has increased significantly since the 1990s (Zoby and Duarte, 2001). Sarandi Stream is a tributary of the right bank of the Mestre d'Armas River, both belonging to the Hydrographic Unit of the Upper São Bartolomeu River, located in the north of the Federal District, with a drainage area of approximately 30 km 2 .…”

Section: Study Areas and Sample Collectionmentioning

confidence: 99%

Untitled

2019

Rev. ambiente água

View full text Add to dashboard Cite

With the goal of assessing possible impacts of fish farming in great-volume cage systems on the water quality of a reservoir, the authors provided abiotic data from 72 samples obtained before and after farming site implementation. The figure shows the principal components analysis results for seven limnological variables. The highest dissolved oxygen (OD) concentrations were observed before the fish farm became operational. During the post-production period, the highest phosphorous (PT) and ammonium (NH4) concentrations were observed as well as high conductivity and turbidity values. Authors concluded that fish farming in cage systems located in Solteira Island Reservoir, Brazil, caused significant temporal and sudden spatial changes in water physical and chemical variables. Source: ROSINI, E. F. et al. Water quality in Ponte Pensa Aquaculture Park, Solteira Island Reservoir, SP, Brazil, where fish are cultivated under greatvolume cage system.

show abstract

Caracterização hidrogeológica da Bacia do Ribeirão Sobradinho - Brasília (DF)

Cited by 5 publications

References 2 publications

Challenges of an integrated water resource management for the Distrito Federal, Western Central Brazil: climate, land-use and water resources

Challenges of an integrated water resource management for the Distrito Federal, Western Central Brazil: climate, land-use and water resources

Selection of variables in the definition of a water quality index for the Brazilian Federal District

Untitled

Contact Info

Product

Resources

About