Riverine water transformation during retention in small lowland reservoirs

Suchowolec, Tomasz; Górniak, Andrzej

doi:10.2478/v10009-009-0047-z

Cited by 3 publications

(3 citation statements)

References 19 publications

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“…(2008) showed that hydrology, climatic forcing and retention time are major forcing functions that promote water circulation (vertical and horizontal) in the reservoir and most likely having a strong effect on dissolved and particulate material distribution. Small reservoirs with short water retention times could contribute to the reduced nutrient retention and also could control biological processes, as discussed by Suchowolec and Górniak (2009), based on research on six small reservoirs in Poland.…”

Section: Discussionmentioning

confidence: 99%

Characterization of water quality in a small hydropower plant reservoir in southern Brazil

Pimenta¹,

Albertoni

Palma‐Silva

2012

Lakes & Reservoirs

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The construction of large reservoirs can cause profound environmental changes. Reduced water flow, increased water residence time, thermal stratification, increased sedimentation rates and decreased dissolved oxygen concentrations are examples of such changes. These changes can affect water quality and the biota in the environments adapted to the natural conditions of a river. Small reservoirs developed in conjunction with hydropower plants, however, could reduce the degraded water quality. This study focuses on characterizing water quality in a small hydroelectric reservoir. The study reservoir has an area of 1.4 km2 and a short water retention time. The Monte Claro Hydroelectric Power Plant is part of a complex consisting of three plants on the Antas River in the north‐west of Rio Grande do Sul state, Brazil. The reservoirs associated with these plants are operated as run‐of‐the‐river facilities. Monitoring results obtained by CERAN, the Energetic Company of Antas River (Companhia Energética Rio das Antas), were used to evaluate the reservoir water quality. Three samples were collected seasonally (spring, summer, autumn and winter) in the area of influence of this plant following the filling of the reservoir (2005–2008). The examined water quality parameters were electrical conductivity, colour, turbidity, alkalinity, pH, biological oxygen demand (BOD), chemical oxygen demand (COD), total phosphorus, dissolved oxygen, sulphate, nitrate, nitrite, ammonia, suspended and dissolved solids, chlorophyll‐a, total and faecal coliforms, water temperature and Secchi depth transparency. The results were interpreted using an index of water quality, Trophic State Index, reservoir water quality and CONAMA Regulation 357/05 (Brazilian legislation). Based on these analyses, no significant changes were exhibited in the water quality of the reservoir from the hydroelectric plant operation.

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Section: Discussionmentioning

confidence: 99%

Characterization of water quality in a small hydropower plant reservoir in southern Brazil

Pimenta¹,

Albertoni

Palma‐Silva

2012

Lakes & Reservoirs

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“…However despite the relatively high content of organic matter in sediments, the mean concentration of PO4 -3 in interstitial water was the lowest among the reservoirs studied. Humic substances, abundant in this reservoir, have strong complexing properties and immediately bind orthophosphate released from decomposition of fresh organic matter (Gorniak 1995;Górniak, Jekatierynczuk-Rudczyk 2006;Suchowolec, Górniak 2009). Spatial coexistence of a high content of TP and a low concentration of PO4 -3 in the sediment of Siemianówka confirms the phenomenon of binding phosphate into humic complexes in the sediment, which immobilizes phosphorus.…”

Section: Discussionmentioning

confidence: 99%

Phosphorus in sediments and pore waters of selected Polish dam reservoirs

Trojanowska

Jezierski

2011

Oceanological and Hydrobiological Studies

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This study aimed to examine and explain the spatial distribution of total phosphorus in sediments and orthophosphates in interstitial water in four Polish dam reservoirs with varying hydrological and geochemical characteristics. The results are linked to physicochemical parameters of sediments: organic matter and calcium carbonates content, pH, redox potential and conductivity.In two of the studied reservoirs hydrological dynamics were a driving force in phosphorus circulation, despite the big difference in their mean water retention times, and interactions with Ca and Fe were of secondary importanceIn other reservoirs with complicated shorelines and reservoir beds, due to water flow disturbance the hydrological impact was not as pronounced. Geochemical processes, such as precipitation of phosphorus associated with Ca +2 , Fe(III) or in complexed with humic substances became more significant.

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“…In reservoirs with longer HRTs, particle sedimentation of adsorbed phosphorus increases and algae and bacteria further consume dissolved phosphorus. In contrast, phosphorus retention is lower in new reservoirs without a buffer plant zone (Suchowolec and Gorniak, 2009). When hydropower stations generate electricity, they must discharge floods for safety; therefore, the HRT will be much shorter than that of reservoirs.…”

Section: Influence Of Storage Capacity and Hydraulic Residence Timementioning

confidence: 99%

Effect of river damming on nutrient transport and transformation and its countermeasures

Wang

Chen²,

Yuan³

et al. 2022

Front. Mar. Sci.

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In recent decades, damming has become one of the most important anthropogenic activities for river regulation, and reservoirs have become hotspots for biogeochemical cycling. The construction of dams changes riverine hydrological conditions and alters the physical, chemical, and biological characteristics of rivers, eventually leading to significant variations in nutrient cycling. This review mainly explores the effects of river damming on nutrient transport and transformation, including i) nutrient (N, P, Si, and C) retention in reservoirs, ii) greenhouse gas (GHG) emissions, and iii) interactions between the nutrient stoichiometry ratio and the health of the reservoir ecosystem. The important drivers of nutrient transport and transformation, such as river connectivity, hydraulic residence time, hydropower development mode, microbial community variation, and anthropogenic pollution, have also been discussed. In addition, strategies to recover from the negative effects of damming on aquatic ecosystems are summarized and analyzed. To provide theoretical and scientific support for the ecological and environmental preservation of river-reservoir systems, future studies should focus on nutrient accumulation and GHG emissions in cascade reservoirs.

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Riverine water transformation during retention in small lowland reservoirs

Cited by 3 publications

References 19 publications

Characterization of water quality in a small hydropower plant reservoir in southern Brazil

Characterization of water quality in a small hydropower plant reservoir in southern Brazil

Phosphorus in sediments and pore waters of selected Polish dam reservoirs

Effect of river damming on nutrient transport and transformation and its countermeasures

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