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You are here: Home » Past Issues » Volume 5, 2010 - Number 1 » BATHYMETRIC AND SEDIMENTOLOGICAL CHANGES OF GLACIAL LAKE ŞTIOL, RODNA MASIFF


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Marcel MÎNDRESCU1, Ionuţ A. CRISTEA1 & Simon M. HUTCHINSON2
1University of Suceava, 13 Universităţii Sreet, Suceava 720229, Romania, marcel.mindrescu@gmail.com
2University of Salford, School of Environment & Life Sciences, Salford, M5 4WT, UK.

BATHYMETRIC AND SEDIMENTOLOGICAL CHANGES OF GLACIAL LAKE ŞTIOL, RODNA MASIFF

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Abstract: Lake Ştiol was one of a number of small glacial lakes in the Rodna Massif (Eastern Carpathians). Despite its originally small dimensions, the lake is situated in one of the largest glacial cirques in the Romanian Carpathians. Being positioned at a relatively low altitude and close to major tourist attractions the lake is one of the most visited locations in the area. In 2002, the lake was illegally dammed and linked to the highway network by an access road, although the planned range of leisure facilities at the lake were not eventually established. The building of the dam in September-October 2002 resulted in the artificial increase of the water level of the lake therefore not only the original contours of the lake been destroyed, but also its dimensional and sediments characteristics have been modified. The greatest modifications were in the volume of water and its surface extent. Consequently, the original glacial lake, in the shape of a tear drop and of relatively small dimensions, has effectively been turned into a high altitude pond, with an uncharacteristic shape (human induced) and a chaotic distribution of depth points. Between the creation of the dam (October 2002) and the sediment sampling in July 2006, an approximately 25 mm thick sediment layer has accumulated on the bed of the lake. The rate of sedimentation is this period may therefore be calculated as around 6 mm y-1. The construction of the dam also altered and extended the drainage network of the lake which in addition to riparian erosion due to the raised water level, accounts fot the currently high rate of sedimentation.

Keyword: changes in dimensions, sedimentary rate, human impact, glacial lake


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