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Assessing the Birkenes model of stream acidification using a multisignal calibration methodology

Water Resources Research

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Abstract

The Birkenes model of streamwater acidification has been revised to incorporate additional chemical and hydrologic information gained since its original construction. An analysis of the hydrologic submodel with the goal of extending it to predict concentrations of a conservative tracer in stream water is given. An objective calibration of the model indicated that the model is overparameterized. Only one passive store is identifiable, not two as currently contained in the model and the routing between the two reservoirs is not determined by the data. Inclusion of the conservative tracer improved the identifiability of the dimensional parameters, but had little effect on the rate or routing parameters. If the hydrologic structure is to be determined from the hydrograph and conservative tracer alone, it must be simplified to eliminate unidentifiable parameters. The validity of using more complex rainfall-runoff models in hydrochemical models which seek to test chemical mechanisms is called into question by this analysis. -from Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Assessing the Birkenes model of stream acidification using a multisignal calibration methodology
Series title:
Water Resources Research
Volume
24
Issue:
8
Year Published:
1988
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Water Resources Research
First page:
1308
Last page:
1316
Number of Pages:
9