id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
fennia-3762	Tikkanen, Matti	Long-term changes in lake and river systems in Finland	2002	12	.pdf	application/pdf	6049	363	71	In this article, the post-glacial history of the main watercourses and lake basins in Finland and the effects of recent human activity on them and on the quality of their water are exam- ined. In some cases, riv- ers have been dredged, lake levels have been low- ered artificially, or lakes have been converted into regulation basins for hydroelectric power schemes.	cache/fennia-3762.pdf	txt/fennia-3762.txt