Long-term changes of dissolved organic carbon in surface waters of Latvia
2005
Klavins, M.(University of Latvia, Riga (Latvia). Dept. of Environmental Science) | Kokorite, I.(University of Latvia, Riga (Latvia). Dept. of Environmental Science) | Rodinov, V.(University of Latvia, Salaspils (Latvia). Inst. of Biology)
The concentrations and loading of organic carbon influence not only direct anthropogenic loading very much, but also character of land use and climate. During the last decade, anthropogenic pressure to the environment has considerably reduced. Within this article, the impact of reduced human loading on the concentrations and flows of dissolved organic matter in Latvian rivers has been evaluated. Influence of land use types and soil texture has been studied. The study revealed an increasing trend of chemical oxygen demand and water color during the last decade. There is a positive correlation between estimates of organic matter content and water discharge. This study did not reveal a clear correlation between the concentrations of dissolved organic carbon (DOC) and land use types within the river basin. A closer relationship was found between DOC concentrations and soil texture.
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