2019
DOI: 10.1590/2318-0331.241920180047
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Cumulative changes in water quality caused by six cascading hydroelectric dams on the Jauru River, tributary of the Pantanal floodplain

Abstract: The present study examines the individual and cumulative environmental effects of the six cascading hydroelectric dams currently in operation on in the Jauru River, a direct tributary of the Paraguay River, the main river in the Pantanal, as well as presenting a general characterization of water quality in the Jauru River. Water quality was evaluated at eight sites along the longitudinal gradient of the Jauru River. A total of 339 water quality samples from between 1990 and 2013 were considered, including 72 s… Show more

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Cited by 7 publications
(7 citation statements)
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“…If hydropower development plans are fully implemented, about 40% of the flow to the Pantanal would go through one or more hydropower plants in the future (Souza Filho, 2013), which could significantly change the ecological dynamics of the Pantanal, altering not only the hydrology but also the thermal, nutrient, sediment and water chemistry regimes, geomorphology, and ecology (Olden and Naiman, 2010;Gao et al, 2012). Specific impacts resulting from impoundments include the reduction of aquatic and terrestrial productivity within the flooded areas (Burford et al, 2011;Schindler and Smits, 2017); instability of river channels (Brooks et al, 2012); reduction of available habitats and landscape alteration (Miranda et al, 2015;Aguiar et al, 2016); reduced connectivity between the river and the riparian zone; disturbance of hydrological regime (Stevaux et al, 2012); and changes in water quality (Fantin-Cruz et al, 2016;Silva et al, 2019).…”
Section: Introductionmentioning
confidence: 99%
“…If hydropower development plans are fully implemented, about 40% of the flow to the Pantanal would go through one or more hydropower plants in the future (Souza Filho, 2013), which could significantly change the ecological dynamics of the Pantanal, altering not only the hydrology but also the thermal, nutrient, sediment and water chemistry regimes, geomorphology, and ecology (Olden and Naiman, 2010;Gao et al, 2012). Specific impacts resulting from impoundments include the reduction of aquatic and terrestrial productivity within the flooded areas (Burford et al, 2011;Schindler and Smits, 2017); instability of river channels (Brooks et al, 2012); reduction of available habitats and landscape alteration (Miranda et al, 2015;Aguiar et al, 2016); reduced connectivity between the river and the riparian zone; disturbance of hydrological regime (Stevaux et al, 2012); and changes in water quality (Fantin-Cruz et al, 2016;Silva et al, 2019).…”
Section: Introductionmentioning
confidence: 99%
“…Oliveira et al (2020) also evaluated nutrient limitation based on concentrations and ratios of total N and P, and note that even modest nutrient retention by SHPs in the most nutrient‐poor river systems, which include the Tenente Amaral system, may ultimately lead to decreased aquatic and floodplain productivity (oligotrophication) in downstream ecosystems. Earlier studies by Silva, Fantin‐Cruz, Lima, and Figueiredo (2019) in the Jauru River and de Oliveira (2016) in the Correntes River showed that cascades of SHPs with longer aggregate residence times were associated with changes in water quality downstream.…”
Section: Discussionmentioning
confidence: 91%
“…Since 2002, a series of run‐of‐river hydropower was built in the Jauru River, and in 2003, a large reservoir was implanted (ANA, 2018; Silva et al, 2019). From then on, the streamflows patterns in stations 5, 6 and 7 showed signs of interference by operations in lakes and reservoirs (i.e.…”
Section: Resultsmentioning
confidence: 99%
“…Along the Jauru River, a series of run‐of‐river enterprises were installed and are in operation, they are mainly used for electricity generation. The first one of them was inaugurated in 2002 and the next year, a reservoir enterprise started its operations in the same area (ANA, 2019; Silva et al, 2019).…”
Section: Methodsmentioning
confidence: 99%