Suggested Criteria for Irrigation Water Intakes in Missouri River Reservoirs,South Dakota.

摘要

Shallow embayments and backwater areas associated with the Missouri River reservoirs form the primary spawning and nursery grounds of fish. The biological impact on these areas on irrigation water intakes was investigated. The study was confined to one type of inlet conveying about 3cfs placed in the productive spawning embayment near the North-South Dakota border called Blue Blanket. Pumping took place during July and August. The pumping had no measurable impact on fish life. No egg, larva or fish life of any kind was detected in the irrigation water samples. Counts of zooplankton numbers in the irrigation water were considerably lower than in the reservoirs,indicating possible avoidance. The flow pattern into the inlets indicates that the zone of influence of the intake is relatively small.