Comment on An additional challenge of Lake Kivu in Central Africa – upward movement of the chemoclines by Finn Hirslund

  • Martin Schmid | martin.schmid@eawag.ch Eawag: Swiss Federal Institute of Aquatic Science and Technology, Switzerland.
  • KellyAnn Ross Eawag: Swiss Federal Institute of Aquatic Science and Technology, Switzerland.
  • Alfred Wüest Eawag: Swiss Federal Institute of Aquatic Science and Technology, Switzerland.

Abstract

In a paper published earlier this year, Hirslund suggested to release degassed deepwater from methane harvesting to the surface layer of Lake Kivu in order to counteract an observed slow rising of the chemoclines in the lake. In this comment, we present strong evidence for the presence of subaquatic springs in the lake that maintain the chemoclines at their present levels. Furthermore, the observed changes in the stratification do not call for urgent action. We therefore strongly advise against the proposed measures, which would most probably be harmful for the ecosystem, and instead propose to further monitor the development of the stratification in the lake.

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Author Biography

Martin Schmid, Eawag: Swiss Federal Institute of Aquatic Science and Technology
Department: Surface Waters - Research and Management Group leader "Applied System Analysis"
Published
2012-07-24
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Section
Notes
Supporting Agencies
Swiss National Science Foundation
Keywords:
Lake Kivu, methane, subaquatic springs
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How to Cite
1.
Schmid M, Ross K, Wüest A. Comment on An additional challenge of Lake Kivu in Central Africa – upward movement of the chemoclines by Finn Hirslund. J Limnol [Internet]. 2012Jul.24 [cited 2021May19];71(2):e35. Available from: https://jlimnol.it/index.php/jlimnol/article/view/jlimnol.2012.e35