Influence of sediment resuspension on the light conditions and algal growth in Lake Balaton

L. Somlyódy, L. Koncsos

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Wind-induced sediment resuspension and its impact on the light conditions were intensively studied in three basins of Lake Balaton, a large shallow lake in Hungary, which is subject to eutrophication. The depth ranges between 2 and 5 m. Frequent observations were made of the wind, the water flows and waves, the suspended solids (ss) concentration, the Secchi disc depth and the light conditions. Four versions of the model were developed for describing the temporal changes in the ss concentration. Models of similar structures were applied for the extinction coefficient and the Secchi disc depth. Several methods were used for calibration. Identifiability and arbitrariness of the model structures have been studied. The extinction model was coupled to a known mass balance equation describing temporal changes in the algal biomass. Sensitivity analysis using hypothetical step-like wind inputs has shown a considerable change in the light limitation factor as compared to the case of steady state winds. Finally, the coupled extinction-algae biomass model was used in a Monte Carlo fashion when longer subsets were selected at random from past wind observations. Late summer conditions and parameters typical for the most eutrophic basin of Lake Balaton (where nutrients are no longer limiting) were selected. The analysis has demonstrated that, in harmony with the observations, the wind has a major impact on the short-term changes of algal biomass. The approach outlined can be utilized to improve the earlier ecosystem models applied for Lake Balaton. The methodology developed is transferable to other shallow lakes.

Original languageEnglish
Pages (from-to)173-192
Number of pages20
JournalEcological Modelling
Volume57
Issue number3-4
DOIs
Publication statusPublished - Oct 15 1991

Fingerprint

resuspension
lakes
sediments
lake
sediment
extinction
algae
biomass
water wave
extinction coefficient
basin
Hungary
eutrophication
water flow
sensitivity analysis
mass balance
calibration
alga
methodology
ecosystems

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecological Modelling
  • Ecology
  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

Cite this

Influence of sediment resuspension on the light conditions and algal growth in Lake Balaton. / Somlyódy, L.; Koncsos, L.

In: Ecological Modelling, Vol. 57, No. 3-4, 15.10.1991, p. 173-192.

Research output: Contribution to journalArticle

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