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MECHANICAL. FISH CONTROL <br />WATER LEVEL MANAGEMENT - COOLWATER SPECIES <br />BASIC PLAN <br />SPRING <br />RISING WATER LEVEL <br />IMPROVE SPAWNING AND NURSERY AREAS <br />MID-SUMMER <br />DRAWDOWN INCREASES FORAGE AVAILABILITY FOR <br />PREDATORS; CONTROL ROUGH FISH <br />REVEGETATION OF FLUCTUATING ZONE PROVIDES <br />EROSION CONTROL AND NUTRIENTS UPON <br />REFLOODING <br />EARLY: MILLET/SORGHUM, LATE: RYE/WHEAT <br />FALL <br />INFLOW RETAINED AND VEGETATION INUNDATES <br />LOWER ZONE PROVIDING FOOD FOR MIGRATING <br />WATERFOWL <br />WINTER <br />DRAWDOWN REDUCES ICE AND <br />SHORELINE VEGETATION <br />PROVIDE STORAGE CAPACITY <br />AND PREVENTS UNTIMELY <br />FISHERIES BENEFITS <br />WAVE DAMAGE-TO <br />FOR SPRING RUNOFF <br />SPRING DRAWDOWNS <br />IMPROVED FORAGE BASE, POPULATION STRUCTURE AND <br />WATER QUALITY <br />INCREASED GROWTH OF GAME FISH, GAME FISH <br />RECRUITMENT AND HARVEST <br />SOURCE: GROEN AND SCHROEDER (1978)