Prediction of effects of daily flow fluctuations on stream biota. Technical completion report

Technical Report · Wed Dec 01 00:00:00 EST 1982

OSTI ID:5793319

Hooper, F F; Ottey, D R

The short-term effects of regulated daily discharges on benthos communities were examined in a small Michigan trout stream. Flow regulation designs simulated fluctuations produced by storage and release for hydroelectric generation, as well as different constant daily stream diversions. Impacts on the dynamics of micro-distribution, species diversity, and behavior were evaluated on stable artificial substrates. Invertebrate drift rates were measured at different discharges during light and dark periods. The caddisfly G. nigrior became less active and oriented downstream when exposed to high discharge, and underwent movements to protected substrate faces. The mayfly Baetis vagans also changed micro-positioning in response to flow fluctuations, but total density changes generally were more pronounced. There was evidence for increased species diversity during low discharges.

• Research Organization: Michigan State Univ., East Lansing (USA). Inst. of Water Research
• OSTI ID: 5793319
• Report Number(s): PB-83-190454
• Country of Publication: United States
• Language: English

Related Subjects

13 HYDRO ENERGY
BENTHOS
BEHAVIOR
HYDROELECTRIC POWER PLANTS
ENVIRONMENTAL IMPACTS
STREAMS
FLOW RATE
DAILY VARIATIONS
ECOLOGY
FLOODS
INSECTS
MICHIGAN
SUBSTRATES
TROUT
ANIMALS
AQUATIC ORGANISMS
ARTHROPODS
DISASTERS
FEDERAL REGION V
FISHES
INVERTEBRATES
NORTH AMERICA
POWER PLANTS
SURFACE WATERS
USA
VARIATIONS
VERTEBRATES
130600* - Hydro Energy- Environmental Aspects