✦ LIBER ✦

Drainage ditch erosion history as recorded in the varved sediment of a small lake in East Finland

✍ Scribed by Olavi Sandman; Anita Lichu; Heikki Simola

Publisher: Springer Netherlands
Year: 1990
Tongue: English
Weight: 803 KB
Volume: 3
Category: Article
ISSN: 0921-2728
DOI: 10.1007/bf00414069

No coin nor oath required. For personal study only.

✦ Synopsis

Short core stratigraphy of total N, P, Zn, Hg and diatoms were investigated in the varved sediment of Lake Hein~lampi, a small 8 m deep pond in East Finland. The sediment has recently changed from organic mud to minerogenic silt. The presence of varved sediment offers independent control for 2~~ and ~37Cs dates and these are in good agreement: the sediment quality initially changed around the year 1930 due to increaed field erosion, and the inflow of mineral matter was further increased by ditching of paludified forests in 1980.

Diatom analysis reveals that eutrophication has occurred before and concurrent with the sedimentary change. The causes of eutrophication and the increased levels of Zn and Hg are discussed.

📜 SIMILAR VOLUMES

Characterizing changes in the sedimentar

Characterizing changes in the sedimentary environment of a varved lake sediment record in southern central Finland around 8000 cal. yr BP

✍ Antti E. K. Ojala; Atko Heinsalu; Tommi Kauppila; Teija Alenius; Matti Saarnisto 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 493 KB

Pollution history from 256 BC to AD 2005

Pollution history from 256 BC to AD 2005 inferred from the accumulation of elements in a varve record of Lake Korttajärvi in Finland

✍ Jarmo J. Meriläinen; Virve Kustula; Allan Witick; Eeva Haltia-Hovi; Timo Saarine 📂 Article 📅 2010 🏛 Springer Netherlands 🌐 English ⚖ 528 KB

Lead pollution history from 256 BC to AD

Lead pollution history from 256 BC to AD 2005 inferred from the Pb isotope ratio (206Pb/207Pb) in a varve record of Lake Korttajärvi in Finland

✍ Jarmo J. Meriläinen; Virve Kustula; Allan Witick 📂 Article 📅 2010 🏛 Springer Netherlands 🌐 English ⚖ 440 KB

Palaeovariations in the East-Asian Monso

Palaeovariations in the East-Asian Monsoon Regime Geochemically Recorded in Varved Sediments of Lake Sihailongwan (Northeast China, Jilin Province). Part 2: a 200-Year Record of Atmospheric Lead-210 Flux Variations and its Palaeoclimatic Implications

✍ Georg Schettler; Jens Mingram; Jörg F. W. Negendank; Liu Jiaqi 📂 Article 📅 2006 🏛 Springer Netherlands 🌐 English ⚖ 585 KB