Sedimentary phosphorus in a cascade of five reservoirs (Lozoya River, Central Spain)

López, Pilar; Marcé, Rafael; Ordóñez, Jaime; Urrutia, Iñaki; Armengol, Joan

doi:10.1080/07438140802714353

Cited by 16 publications

(14 citation statements)

References 45 publications

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“…In the present study, some of the individual reservoirs showed a gradient from the upper portion to the dam, as observed by Mariani and Pompêo (2008) and Pompêo et al (2013) for metals in the sediments of the Rio Grande and Guarapiranga reservoirs (Brazil). Similar patterns for concentrations of N and P in sediment were observed in the five cascade reservoirs in the River Lozoya (central Spain), with spatial heterogeneity both among and within reservoirs (Lopez et al 2009). …”

Section: Resultssupporting

confidence: 64%

Nitrogen and phosphorus in cascade multi-system tropical reservoirs: water and sediment

Pompêo¹,

Moschini‐Carlos

López-Doval³

et al. 2017

Limnological Review

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Abstract:The aim of this research was to analyze the horizontal spatial heterogeneity of both water and superficial sediment quality among and within the reservoirs of the Cantareira System (CS), focusing on concentrations of N and P, attributed to the dumping of raw domestic sewage into water bodies, which is the main cause of water pollution in São Paulo State (Brazil). The CS is a multi-system complex composed of five interconnected reservoirs, with water transported by gravity through 48 km of tunnels and channels. From the last reservoir of the CS, with an output of 33 m 3 s -1, the water is conducted to a water treatment plant, producing half of the water consumed by 19 million people inhabiting São Paulo city. The upstream reservoirs are more eutrophic than the downstream ones. Data also suggest that the low phytoplankton biomass (ranging from 0.9 to 14.4 µg dm ). For water, the DIN/TP ratios values range from 19 to 380. The upstream reservoirs function as nutrient accumulators and the sediment is the main compartment in which P and N are stored. Although the reservoirs are located in different river basins and are not in sequence along the same river, the results suggest a marked gradient between the reservoirs, with features similar to those of cascade reservoirs. The large volumes flowing through the canals and tunnels could explain the observed pattern. The CS reservoirs can therefore be considered multi-system reservoirs in cascade, constituting a particular case of multi-system reservoirs.

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Section: Resultssupporting

confidence: 64%

Nitrogen and phosphorus in cascade multi-system tropical reservoirs: water and sediment

Pompêo¹,

Moschini‐Carlos

López-Doval³

et al. 2017

Limnological Review

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“…Phosphorus also can be released to overlying water from sediments and the sediments act as a source. Internal P loading significantly affects the trophic status downstream and minimizes the effects of management actions to reduce external loading (Lopez et al, 2009;Roy et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

The phosphorus speciations in the sediments up- and down-stream of cascade dams along the middle Lancang River

Liu

Zhao

et al. 2015

Chemosphere

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“…6 The seasonal dynamics of the PTSI values for the sampling days. The values are not adjusted to the scale from 0.5 to 5.5 and type specific class boundaries according to are indicated on the y-axis Nilsson & Renöfält, 2008;Sollie et al, 2008;Lopez et al, 2009) and so these ecosystems could trap also a substantial part of the nutrient runoff from the L. Varese catchment. In L. Monate catchment there are no other water bodies or wetland areas that could retain part of the loading from runoff.…”

Section: Discussionmentioning

confidence: 99%

Increased nutrient loading and rapid changes in phytoplankton expected with climate change in stratified South European lakes: sensitivity of lakes with different trophic state and catchment properties

Nõges

Ghiani

et al. 2011

Hydrobiologia

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We hypothesised that increasing winter affluence and summer temperatures, anticipated in southern Europe with climate change, will deteriorate the ecological status of lakes, especially in those with shorter retention time. We tested these hypotheses analysing weekly phytoplankton and chemistry data collected over 2 years of contrasting weather from two adjacent stratified lakes in North Italy, differing from each other by trophic state and water retention time. Dissolved oxygen concentrations were higher in colder hypolimnia of both lakes in the second year following the cold winter, despite the second summer was warmer and the lakes more strongly stratified. Higher loading during the rainy winter and spring increased nutrient (N, P, Si) concentrations, and a phytoplankton based trophic state index, whilst the N/P ratio decreased in both lakes. The weakened Si limitation in the second year enabled an increase of diatom biovolumes in spring in both lakes. Chlorophyll a concentration increased in the oligo-mesotrophic lake, but dropped markedly in the eutrophic lake where the series of commonly occurring cyanobacteria blooms was interrupted. The projected increase of winter precipitation in southern Europe is likely to increase the nutrient loadings to lakes and contribute to their eutrophication. The impact is proportional to the runoff/in-lake concentration ratio of nutrients rather than to the retention time, and is more pronounced in lakes with lower trophy.

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Sedimentary phosphorus in a cascade of five reservoirs (Lozoya River, Central Spain)

Cited by 16 publications

References 45 publications

Nitrogen and phosphorus in cascade multi-system tropical reservoirs: water and sediment

Nitrogen and phosphorus in cascade multi-system tropical reservoirs: water and sediment

The phosphorus speciations in the sediments up- and down-stream of cascade dams along the middle Lancang River

Increased nutrient loading and rapid changes in phytoplankton expected with climate change in stratified South European lakes: sensitivity of lakes with different trophic state and catchment properties

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