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

Technical Report · Wed Dec 01 04:00:00 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
130600* -- Hydro Energy-- Environmental Aspects
ANIMALS
AQUATIC ORGANISMS
ARTHROPODS
BEHAVIOR
BENTHOS
DAILY VARIATIONS
DISASTERS
ECOLOGY
ENVIRONMENTAL IMPACTS
FEDERAL REGION V
FISHES
FLOODS
FLOW RATE
HYDROELECTRIC POWER PLANTS
INSECTS
INVERTEBRATES
MICHIGAN
NORTH AMERICA
POWER PLANTS
STREAMS
SUBSTRATES
SURFACE WATERS
TROUT
USA
VARIATIONS
VERTEBRATES