The importance of lake morphometry and catchment characteristics in limnology – ranking based on statistical analyses

Håkanson, Lars

doi:10.1007/s10750-004-5032-7

Cited by 78 publications

(63 citation statements)

References 23 publications

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“…Sedimentation rate and % sedimentation decreased with altitude and were slightly related to morphometric features of reservoirs. These variables are generally related to lithological and morphological characteristics of catchments [37,73,74,75]. Increasing sedimentation with diminishing altitude can be linked to increasing fluxes of coarse particulate in sediments at low altitudes.…”

Section: Relations Between Sediment Quality and Physical-chemical Drimentioning

confidence: 99%

Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

Marziali¹,

Tartari²,

Salerno³

et al. 2017

Preprint

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Abstract:Reservoirs are characterized by accumulation of sediments where micropollutants may concentrate, with potential toxic effects on downstream river ecosystems. However, sediment management such as flushing is needed to maintain storage capacity. Climate change is expected to increase sediment loads, but potential effects on their quality are scarcely known. In this context, sediment contamination by trace elements (As, Cd, Cr, Cu, Hg, Ni, Pb, Zn) and organics (PAHs, PCBs, C>12) was analyzed in 20 reservoirs located in Italian Central Alps. A strong As and a moderate Cd, Hg and Pb enrichment was emphasized by Igeo, with potential ecotoxicological risk according to PEC quotients. Sedimentation rate, granulometry, total organic carbon (TOC) and altitude resulted as the main drivers governing pollutant concentrations in sediments. According to climate change models, expected increase of rainfall erosivity will enhance soil erosion and consequently the sediment flow to reservoirs, potentially increasing coarse grain fractions and thus potentially diluting pollutants. Conversely, increased weathering may enhance metal fluxes to reservoirs. Increased vegetation cover will potentially result in higher TOC concentrations, which may contrast contaminant bioavailability and thus toxicity. Our results may provide elements for a proper management of contaminated sediments in a climate change scenario aiming at preserving water quality and ecosystem functioning.

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Section: Relations Between Sediment Quality and Physical-chemical Drimentioning

confidence: 99%

Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

Marziali¹,

Tartari²,

Salerno³

et al. 2017

Preprint

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“…A resolution and gives exact information of the actual lake surface. Consequently, the quality of predicting models increases, apart the ecological aspects, with the accuracy of morphometric data of the lakes (Hakanson, 2005;Johansson et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…The study of lake morphology is fundamental not only for the knowledge of its shape, but also for understanding the processes referred to internal currents and the structuring of strata that exert influence on the transport of nutrients and the distribution of biological communities (Hakanson, 1977(Hakanson, , 1982(Hakanson, , 2005Fee, 1979;Blais and Kalff, 1995;Fantin-Cruz et al, 2008;Nõges, 2009;Liu et al, 2010Liu et al, , 2011Lawniczak et al, 2011;Stefanidis and Papastergiadou, 2012;Murdoch and Power, 2013;Kolada, 2014). Thienemann (1927) already established that morphology is important for the classification of the trophic state of lakes, ranking shallow lakes as eutrophic and deep lakes as oligotrophic.…”

Section: Introductionmentioning

confidence: 99%

Morphological characterization of eighteen lakes of the north and middle coast of Rio Grande do Sul, Brazil

et al. 2014

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Aims: The present study aimed at a morphological characterization of 18 lakes of the municipalities of Cidreira, Balneário Pinhal and Palmares do Sul, situated in the northern and middle coastal plain of Rio Grande do Sul, Brazil. Methods: The morphometric survey was conducted in the summer of 2011/2012, based on echo sounder coupled with GPS and the application of remote sensing and GIS procedures. The morphometric parameters used for the characterization were: surface area, perimeter, perimeter development, volume, relative fetch, maximum depth, average depth, relative depth, median depth of volume, length and width. The statistical interpretation included Test of Normality, Coefficient of Variation, Correlation and Regression Analysis, Cluster Analysis, Discriminant Analysis and Principal Component Analysis. Results: Eighteen lakes were described and five of them are presented by aerial photo and bathymetric map. They represent the proposed morphological lake types. The calculation of the coefficient of variation revealed larger amplitudes of parameters related to lake size than to depth. The application and interpretation of cluster analysis, confirmed by discriminant analysis, distinguished those lakes in five morphological groups, which differ mainly by size and subsequently by depth. The Principal Component Analysis identified the first component with positively charged variables of size and negatively charged relative depth, and a second component with positive charge of maximum and average depths. Conclusions: The low relative depths and the exposure to constant northeastern winds reduce the transparency of the lakes. Consequently, they are light limited by suspension of inorganic and organic matter. A property that limits the application of trophic state indices. The high dynamic of the water bodies produces an oxygenated sediment surface that facilitates the settlement by aerobic organisms all over the bottom area. The shallowness and the low median depths of volume are limiting factors for sustainable water supply management. The morphological characteristics of the coastal lakes make very difficult an accurate ecological assessment based on usual trophic state criterions and a sustainable water resource management using general guidelines.Keywords: coastal lakes, morphology, coastal plain, Rio Grande do Sul, Brazil.Resumo: Objetivos: O presente estudo teve como objetivo a caracterização morfológica de 18 lagoas costeiras dos municípios de Cidreira, Balneário Pinhal e Palmares do Sul, no Litoral Norte e Médio do Rio Grande do Sul, Brasil. Métodos: No verão de 2011 e 2012 foram realizados levantamentos batimétricos, orientados por GPS, com aplicação de sensoriamento remoto e SIG. Os parâmetros morfométricos utilizados para a caracterização foram: área, perímetro, desenvolvimento de perímetro, volume, fetch relativo, profundidade máxima, profundidade média, profundidade relativa, profundidade mediana do volume, largura e comprimento. A interpretação estatística incluiu teste de normalidade, c...

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“…Sedimentation rate and percent sedimentation decreased with altitude and were slightly related to morphometric features of reservoirs. These variables are generally related to lithological and morphological characteristics of catchments [37,[73][74][75]. Increasing sedimentation with diminishing altitude can be linked to increasing fluxes of coarse particulate in sediments at low altitudes.…”

Section: Potential Effects Of Climate Change On Sediment Quality In Rmentioning

confidence: 99%

Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

Marziali

Tartari

Salerno

et al. 2017

Water

View full text Add to dashboard Cite

Abstract:Reservoirs are characterized by accumulation of sediments where micropollutants may concentrate, with potential toxic effects on downstream river ecosystems. However, sediment management such as flushing is needed to maintain storage capacity. Climate change is expected to increase sediment loads, but potential effects on their quality are scarcely known. In this context, sediment contamination by trace elements (As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn) and organics (Polycyclic Aromatic Hydrocarbons PAHs, Polychlorinated Biphenyls PCBs and C > 12 hydrocarbons) was analyzed in 20 reservoirs located in Italian Central Alps. A strong As and a moderate Cd, Hg and Pb enrichment was emphasized by I geo , with potential ecotoxicological risk according to Probable Effect Concentration quotients. Sedimentation rate, granulometry, total organic carbon (TOC) and altitude resulted as the main drivers governing pollutant concentrations in sediments. According to climate change models, expected increase of rainfall erosivity will enhance soil erosion and consequently the sediment flow to reservoirs, potentially increasing coarse grain fractions and thus potentially diluting pollutants. Conversely, increased weathering may enhance metal fluxes to reservoirs. Increased vegetation cover will potentially result in higher TOC concentrations, which may contrast contaminant bioavailability and thus toxicity. Our results may provide elements for a proper management of contaminated sediments in a climate change scenario aiming at preserving water quality and ecosystem functioning.

show abstract

The importance of lake morphometry and catchment characteristics in limnology – ranking based on statistical analyses

Cited by 78 publications

References 23 publications

Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

Morphological characterization of eighteen lakes of the north and middle coast of Rio Grande do Sul, Brazil

Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

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