Limnology

Tundisi, José Galízia; Tundisi, Takako Matsumura

doi:10.1201/b11386

Cited by 49 publications

(40 citation statements)

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“…Lake Balaton is the largest shallow lake in Central Europe in area (592 km 2 ) with average depth of 3.2 m. Due to its shallow depth and regular resuspension of bottom sediment, lake Balaton is a vertically well mixed and turbid system, entirely nonstratified, even during the summer season (Likens 2010;Tundisi et al 2012). In the 1980s, the western part of the lake became hypertrophic, and the central and the eastern basins became eutrophic (Herodek 1986).…”

Section: Study Areamentioning

confidence: 99%

Ground truth data on chlorophyll-a, chromophoric dissolved organic matter and suspended sediment concentrations in the upper water layer as obtained by LIF lidar at high spatial resolution

Pelevin

Zlinszky

Khimchenko

et al. 2017

International Journal of Remote Sensing

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This article is based on field measurements on the lake Balaton (Hungary) during the three days: 10, 11, and 12 September 2008. The expedition was performed with the aim to test recently developed ultraviolet (UV) fluorescent portable lidar UFL-8 in natural lake waters and to validate it by contact conventional measurements. We had opportunity to compare our results with the Moderate Resolution Imaging Spectroradiometer (MODIS)/Terra spectroradiometer satellite images received at the satellite monitoring station of the Eötvös Loránd University (Budapest, Hungary) to make an attempt of lidar calibration of satellite medium-resolution bands data. Water quality parameters were surveyed with the help of UFL lidar in a time interval very close to the satellite overpass. High resolution maps of the chlorophyll-a, chromophoric dissolved organic matter and total suspended sediments spatial distributions were obtained.

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Section: Study Areamentioning

confidence: 99%

Ground truth data on chlorophyll-a, chromophoric dissolved organic matter and suspended sediment concentrations in the upper water layer as obtained by LIF lidar at high spatial resolution

Pelevin

Zlinszky

Khimchenko

et al. 2017

International Journal of Remote Sensing

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“…Nevertheless, only a handful of studies globally have analysed the contribution of nitrous oxide (N 2 O) to total GHG emissions from reservoirs (Deemer et al, ; Descloux, Chanudet, Serça, & Guérin, ; Guérin, Abril, Tremblay, & Delmas, ; Tremblay, Varfalvy, Roehm, & Garneau, ), despite N 2 O having a higher global warming potential (GWP) compared with CH 4 . Further, there are sparse data from the tropical areas, although tropical reservoirs exhibit high run‐offs and associated high organic carbon loads resulting from irregular and heavy precipitation (Tundisi, Matsumura‐Tundisi, & Calijuri, ), as well as nearly constant and elevated temperatures that causes thermal stratification and deoxygenation of bottom waters (Barros et al, ; Tundisi & Tundisi, ). These conditions are known to be favourable conditions for enhanced CH 4 and N 2 O production and emissions (Demarty & Bastien, ; Fearnside, ; Galy‐Lacaux, Delmas, Kouadio, Richard, & Gosse, ; Guérin et al, ).…”

Section: Introductionmentioning

confidence: 99%

Diffusive emissions of methane and nitrous oxide from a cascade of tropical hydropower reservoirs in Kenya

et al. 2019

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The present study investigated diffusive emissions of methane (CH4) and nitrous oxide (N2O) to the atmosphere from three relatively small (3–120 km2) reservoirs (Masinga, Kamburu and Gitaru) on the Tana River (Kenya). Sampling was conducted biweekly in 2011, 2012 and 2013, at sampling sites upstream and downstream of these reservoirs while five sampling campaigns were carried out in 2011, 2012 and 2013 for different sites within each of the reservoirs. The dissolved CH4 (range: 19–2101 nmol/L) and N2O (range: 6.2–11.5 nmol/L) concentrations in the surface waters were generally very low in the three reservoirs, compared with other reservoirs globally. The lower diffusive emissions of CH4 (20–216 µmol/m2 day−1) and N2O (1.0–1.6 µmol/m2 day−1) from these reservoirs, compared with other tropical reservoirs, are probably related to their age (30–40 years), and lower vegetation biomass (savannah) originally present and submerged during their commissioning. The reservoirs with longer water residence times were characterized by higher diffusive CH4 fluxes (216 ± 666 µmol/m2 day−1) and slightly lower N2O fluxes (1.0 ± 1.5 µmol/m2 day−1). The relative contribution of turbine fluxes of CH4 and N2O, compared to diffusive fluxes, was also highly variable among the three dams, being lower in Masinga Reservoir and higher in Gitaru Reservoir.

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“…4. Seeking to receive the best possible correspondence with the experiment data, three areas of measurement data were separated: 1) the basic data sequence, 2) the second epilimnion [25], and 3) the sediments area. The total approximation function T(h) is represented as the sum of three functions:…”

Section: Approximation Of Experimental Resultsmentioning

confidence: 99%

“…However, according to our and other researchers' results, the thermodepth addiction can be much more complicated (see, e.g., [2][3][4][5][6]). The subtlety of the T(h) dependence may be explained by second thermoclines (see, e.g., [25]). In our model, this would mean a greater number of domains and approximation functions.…”

Section: (12c)mentioning

confidence: 99%

Peculiarities of the Vertical Thermal Regime of Lake Tapeliai

Miškinis¹,

Moisejenkova²,

Jukna³

et al. 2019

Pol. J. Environ. Stud.

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One of the basic parameters of lake water is temperature [1, 2]. The willingness to determine the thermal structure theoretically applicable to the biggest variety of lakes drives professionals to create quite complex software packages taking into account all possible internal and external factors that determine lake water temperature changes [3-5]. Mathematically, such software packages comprise 9-15 nonlinear differential equations with partial derivatives and border and initial conditions of the same amount. The model has about 10 free parameters, which in principle give a good coincidence with experimental data (see [4-6]). Determining the lake thermal structure belongs to the classical limnology area and is under investigation up to now (see, e.g., [28, 29] and the references therein). Continuous thermodynamic, hydrophysical and other processes allow us to group lakes under selected criteria. Usually, they are classified according to the origin of water sources, water chemical structure, slope, water quality, water level, water circulation intensity, etc. [7-10]. Many works have recently analyzed the

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Limnology

Cited by 49 publications

References 0 publications

Ground truth data on chlorophyll-a, chromophoric dissolved organic matter and suspended sediment concentrations in the upper water layer as obtained by LIF lidar at high spatial resolution

Ground truth data on chlorophyll-a, chromophoric dissolved organic matter and suspended sediment concentrations in the upper water layer as obtained by LIF lidar at high spatial resolution

Diffusive emissions of methane and nitrous oxide from a cascade of tropical hydropower reservoirs in Kenya

Peculiarities of the Vertical Thermal Regime of Lake Tapeliai

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