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Effects on the Central Platte <br />• Sediment size has doubled: .41 to .81 mm. <br />• Peak flow cut: 16,000 to less than 8,000 cfs <br />• Channel change: braided to anabranched. <br />• Flow depths increased for a given discharge <br />• Flow velocity increased for a given <br />discharge. <br />• Peak flows were primarily in Spring; now <br />thunderstorms may create highest flow. <br />Effects (continued) <br />• River bed has degraded. <br />• Channel width narrowed from over 1 mile <br />to approximately 1,200 feet. <br />• Unvegetated channel reduced by 70 -90% <br />• Abundant shifting sandbars gone = => now <br />fewer bars & many wooded islands. <br />• Habitat was available under a wide range of <br />flows =_> now habitat is very flow <br />dependent. <br />