By Jiří V Černý; Bedr̆ich Moldan
Individual multinational participants current learn of small catchments to ascertain a number of environmental difficulties, specially these of acidification, wooded area administration and land-use alterations. Divided into elements, it introduces theoretical innovations by way of a assessment of atmospheric deposition and assessment of weathering and erosion methods. the second one part bargains with the method of the given self-discipline, stressing novel ways and discussing difficulties
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Extra resources for Biogeochemistry of small catchments : a tool for environmental research ; [summary of meeting held in Most, Czechoslovakia Nov. 1990]
Of particular hydrochemical importance is dissolved organic carbon (DOC). It often plays a major role in determining the acid-base and metal complexation characteristics of soil water and streamwater (see Chapter 12, this volume). The small watershed approach is an effective tool to facilitate understanding of transport and cycling of trace metals in forest ecosystems, and subsequent effects on surface waters. However, care must be exercised in the collection and analysis of samples for trace metals.
Chemical weathering also plays a major role in determining the composition of natural waters (Garrels and Christ, 1965). The chemical reactions that govern the conversion of bedrock minerals into soil minerals determine the release of dissolved constituents to the waters. By this mechanism, base cations, silica and other essential nutrients are made available to biological systems. The more reactive the minerals in the bedrock, the greater the concentration of dissolved substances in the water.
Environ. Eng. , Am. Soc. Civ. Eng. 108: 455-472. Christophersen, N. and Neal, C. (1990) Linking hydrological, geochemical, and soil chemical processes on the catchment scale-An interplay between modeling and field work. Water Resour. Res. 26: 3077-3086. Christophersen, N. and Wright, RE (1981) Sulfate budget and a model for sulfate concentrations in stream water at Birkenes, a small forested catchment in Southernmost Norway. Water Resour. Res. 17: 377-389. M. and Wright, RE (1982) A model for streamwater chemistry at Birkenes, Norway.