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STREAM TYPES IN THE DES MOINES RIVER BASIN 1
Author(s) -
Stephenson Richard A.
Publication year - 1971
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1971.tb05054.x
Subject(s) - streams , tributary , drainage basin , terrain , hydrology (agriculture) , channel (broadcasting) , geology , glacial period , structural basin , linear discriminant analysis , drainage , discriminant function analysis , geomorphology , geography , cartography , ecology , statistics , geotechnical engineering , computer network , engineering , computer science , electrical engineering , biology , mathematics
Stream tributaries in the Des Moines River basin have been classified according to the glacial terrain through which they flow. Three stream types were categorized as follows: (1) streams that flow entirely on Wisconsin drift, (2) streams that flow entirely on Kansan drift, and (3) streams that have their headwaters located on new drift but have their lower reaches flowing on older drift. Selected channel and valley characteristics were measured and used to verify the stream type classification. Five variables were chosen for use in a multiple linear discriminatory analysis, which is a statistical technique developed for the purpose of classifying observations into one of several categories which have been predetermined. The streams in each group were verified with the exception of three anomalies based on the probability associated with the largest linear discriminant function. The rationale for the three anomalous streams is not easily determined. But, they are considered to be associated with pre‐glacial drainage or at least pre‐Wisconsin age drainage. Otherwise, the analysis shows that the major channels and valleys in the Des Moines River basin tend to reflect the glaciated upland surface.