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The relationship of catchment topography and soil hydraulic characteristics to lake alkalinity in the northeastern United States

Water Resources Research

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, , ,

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Abstract

The influence of topography and soils on catchment hydrology has been incorporated previously in the variable source area model TOPMODEL as the relative frequency distribution of In (a/Kb tan B), where In is the Naperian logarithm, "a' is the area drained per unit contour, K is the saturated hydraulic conductivity, b is the total depth, and tan B is the slope. Using digital elevation and soil survey data, the In (a/Kb tan B) distribution for 145 catchments was calculated. Indices of flow path partitioning and soil contact time were derived from the In (a/Kb tan B) distributions and compared to measurements of alkalinity in lakes to which the catchments drain. Alkalinity was, in general, positively correlated with the index of soil contact time, whereas the correlation between alkalinity and the flow path partitioning index was weak at best. A portion of the correlation between the soil contact time index and alkalinity was attributable to covariation with soil base saturation and cation exchange capacity, while another portion was found to be independent of these factors. -from Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
The relationship of catchment topography and soil hydraulic characteristics to lake alkalinity in the northeastern United States
Series title:
Water Resources Research
Volume
25
Issue:
5
Year Published:
1989
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
829
Last page:
837
Number of Pages:
9