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Model parameterization for aerobic decomposition of plant resources drowned during man-made lakes formation

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  • Bianchini, Irineu
  • da Cunha Santino, Marcela Bianchessi

Abstract

The formation of man-made reservoirs generates several impacts on water quality. In order to minimize some of these impacts mathematical models are currently used. This paper aims to discuss the issue associated with the degradation of plant resources (leaves, branches, barks and litter) that remain within the watershed of the new man-made lakes and parameterize a kinetic model related to decay of plant detritus. In these environments, the short-term variation of limnological parameters is mainly connected with biomass decay drowned during the filling operation. The kinetics of the degradation processes in reservoirs are discussed on the basis of information with related to detritus sources and the chemical properties of different types of compounds (i.e. labile and refractory fractions). Overall, the parameterization of the (first order) kinetic model showed that refractory fractions (ca. 86%) are predominant and the mineralization is a slow process, constituting the main route for decomposition and being affected by changes of environmental variables. The mineralization of labile and hydrosoluble compounds (ca. 14%) is responsible for the short-term water quality variation owing to decomposition; basically, the intensities of these changes depend on the labile/soluble compounds content of detritus and its chemical composition.

Suggested Citation

  • Bianchini, Irineu & da Cunha Santino, Marcela Bianchessi, 2011. "Model parameterization for aerobic decomposition of plant resources drowned during man-made lakes formation," Ecological Modelling, Elsevier, vol. 222(7), pages 1263-1271.
    • Handle: RePEc:eee:ecomod:v:222:y:2011:i:7:p:1263-1271
    DOI: 10.1016/j.ecolmodel.2011.01.019
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    References listed on IDEAS

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    1. Philip Fearnside, 2005. "Do Hydroelectric Dams Mitigate Global Warming? The Case of Brazil's CuruÁ-una Dam," Mitigation and Adaptation Strategies for Global Change, Springer, vol. 10(4), pages 675-691, October.
    2. da Cunha Santino, Marcela Bianchessi & Bianchini, Irineu, 2008. "Carbon cycling potential from Utricularia breviscapa decomposition in a tropical oxbow lake (São Paulo, Brazil)," Ecological Modelling, Elsevier, vol. 218(3), pages 375-382.
    3. David Johnson & Colin D. Campbell & John A. Lee & Terry V. Callaghan & Dylan Gwynn-Jones, 2002. "Arctic microorganisms respond more to elevated UV-B radiation than CO2," Nature, Nature, vol. 416(6876), pages 82-83, March.
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