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Other Questions Being Addressed <br />What is the sand (bed material load) budget of the Central Platte River and how does it affect the channel degradation and narrowing processes? If the river <br />channel is only half of its pre - development size (area), can its bed level be maintained by only half of its pre - development transport of sand? <br />local natural and human - caused features? <br />What are the processes of sand bar development, maintenance, and growth /reduction in the Central and under what flow, sediment transport, and ice - affected <br />conditions do bars grow /reduce? <br />To what extent does lateral erosion from bars, islands or banks provide sediment (bed material load) to the river under current conditions? <br />Is the lateral erosion process or the vertical erosion process more dominant in removing vegetation? <br />How high can a sand bar be (with respect to some reference flow level) before it is susceptible to colonization and growth of vegetation to preclude it from being <br />considered acceptable habitat or being transformed into a vegetated island? <br />How high are existing and desired bars with respect to the stage corresponding to the annual peak and summer high flows, and is the annual peak flow or some <br />other reference flow a better indicator of natural or desired sand bar height? <br />Will sand deposition occur and will sand bars rise to the stage of the peak pulse flow without artificially reducing velocities over the backs of the bars? <br />What data need to be collected and analyzed to establish or confirm current trends in sand bars and to monitor changes in this variable over the foreseeable future? <br />How high can sand bars be developed using flow and sediment transport (under the current flow and sediment regime and under a vegetation removal /bar building <br />regime — with and without direct sand augmentation)? <br />Can velocities of flow sufficient to remove vegetation from the tops of bars also be sufficiently low to allow deposition of sand to build the bars higher? <br />To what extent does lateral erosion from bars, islands or banks provide sediment (bed material load) to the river under current conditions? <br />Is the aging of vegetation and islands in the Platte River increasing their erodibility such that the current flow regime could develop in the near future acceptably <br />wide unobstructed widths? <br />What are the processes of sand bar development, maintenance, and growth /reduction in the Central and under what flow, sediment transport, and ice - affected <br />conditions do bars arow /reduce? <br />Will sand deposition occur and will sand bars rise to the stage of the peak pulse flow without artificially reducing velocities over the backs of the bars? <br />Are stage changes between the beginning and peak of a pulse flow sufficiently large to provide the bar heights considered acceptable? Stated another way, <br />wouldn't changes in flow rates to produce X -ft of sand bar height be prohibitively large because large changes in flow are required in the Platte to cause even minor <br />chnnops in ttnop? <br />What impact on the heights and area extent of sand bars would the proposed restoration activities have? <br />