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VOL. 12, ISSUE 11 (2025)
Study of the succession of Lake Tondano into Land
Authors
Treesje K Londa, Jeane C Rende, Felly F Warouw, Meidy A Kuron
Abstract
Lake Tondano, the largest lake in North
Sulawesi, is experiencing ecological pressure due to anthropogenic activities
such as settlements, agriculture, fisheries, and tourism. This study aims to
analyze the Water Pollution Index (WPI) and sedimentation levels in the
Mawalelong River Estuary to understand the ecological succession process from
the lake to the mainland. Water sampling was conducted at two locations: a
residential area and a water hyacinth area, followed by analysis of physical,
chemical, and biological parameters. The results show that the Water Pollution
Index (WIP) at the two locations is in the ‘Very Heavy’ category in Class I and
Class II’ (WIP > 70), the ‘Severe’ category in Class III (WIP = 50 – 70),
the ‘Moderate’ category in Class IV (WIP = 30 – 50). The average sedimentation
rate is 5.35 mL/hour, indicating significant sediment accumulation. This
condition accelerates siltation and supports the growth of water hyacinth,
accelerating the succession of the lake towards land. Water hyacinth control,
reduction of organic pollutant sources, sedimentation control, regular
monitoring, and community involvement are recommended to maintain the
ecological function of the lake.
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Pages:129-131
How to cite this article:
Treesje K Londa, Jeane C Rende, Felly F Warouw, Meidy A Kuron "Study of the succession of Lake Tondano into Land ". International Journal of Multidisciplinary Research and Development, Vol 12, Issue 11, 2025, Pages 129-131
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