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CHANNELIZATION AND INVERTEBRATE DRIFT IN SOME IOWA STREAMS 1
Author(s) -
Zimmer David W.,
Bachmann Roger W.
Publication year - 1978
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.1752-1688.1978.tb05585.x
Subject(s) - sinuosity , channelized , streams , tributary , hydrology (agriculture) , invertebrate , channel (broadcasting) , habitat , environmental science , geology , confluence , tailwater , ecology , geomorphology , oceanography , geography , biology , geotechnical engineering , computer network , telecommunications , cartography , engineering , computer science , electrical engineering , programming language
Habitat diversity and invertebrate drift were studied in a group of natural and channelized tributaries of the upper Des Moines River during 1974 and 1975. Channelized streams in this region had lower sinuosity index values than natural channel segments. There were significant (P=O.05) positive correlations between channel sinuosity and the variability of water depth and current velocity. Invertebrate drift density, expressed as biomass and total numbers, also was correlated with channel sinuosity. Channelization has decreased habitat variability and invertebrate drift density in streams of the upper Des Moines River Basin and probably has reduced the quantity of water stored in streams during periods of low flow.