Wet Meadows: Hypotheses 1-8 (2) - Laserfiche WebLink

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Dependent Variable Corresponding quantitative Description of alternative/competing (Indicator) management objective hypotheses Priority Augmentation greater than nr less than 225,000 tons/year is Increase exposed bar area at an index needed to balance the sediment budget and increase exposed Planform surface area flow of 1,200 cfs from X acres to Y bar area. of exposed bars at a acres bebaeen Overton and Grand Medium flow o( 1,200 cfs Island There fs no sediment imbalance. Exposed bar area or occurence o( braiding will not be affected by increased sediment. Maintain balanced sediment budget in Sedimeni balance is insignrficant except m local instances. channel bed elevation atl reaches, Prevent future systematic (storage) In different channel bed lowering between Overton Sa6stacto bar areas can be created and maintained throu h ry 9 H?gh reaches and Grand Island, Prevent future strictly mecharncal actions systemaGc channel bed raismg in downstream reaches Augmentation greater than or less than 225,000 tons/year is Convert averaye braidmg index rnr needed to balance the sediment budget and increase the Bra?d?ng ?ndex main channei m the reach between Braiding Index r1?gr, Overton and Grand Island to greater than 3. There is no sediment budget imbalance and adding more sediment will not change the Braiding Index Increase exposed bar area at an index There is no relationship between braiding index and area of Plantorm surtace area floy of 1,200 cfs from X acres to Y exposed bars. of exposed bars at a acres beNveen Overton and Grand Meaium flow o( 1,200 cfs Exposed bars may be created (maintained) through Island mechanical means wnthout need to change braiding indez