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<br />11 <br /> <br />(2) Number of subdivided reaches. <br />(3) Locations of tributaries. <br />(4) Cross-section geometries of all sections. <br />(5) Manning's n at each section. <br />(6) Upstream and tributary inflow hydrographs and stage data for every <br />time step. <br />(7) Sediment-transport coefficients. <br />(8) Characteristic parameters for each dam, including its discharge <br />coefficient, width, ~~d height. <br /> <br />7. Model Limitations and Applicability: <br /> <br />The use of KUWASER is limited to subcritical flows. The model does not <br />predict channel armoring or two-dimensional flow effects. KUWASER cannot <br />effectively model a river reach with extremely irregular channel grade and <br />geometry, but has the capability to model the main stem and tributaries in an <br />entire river system. KUWASER can simulate divided flows associated with bars, <br />islands, or channel breaches. The model finds its best application in long- <br />term degradation/aggradation analysis. <br /> <br />c. UUWSR (Uncoupled. Unsteady Water and Sediment Routing): <br />1. Developer: Tucci, Chen, and Simons (Colorado State Univeristy), 1979 <br />2. Previous Applications: <br />(1) Upper Mississippi and Lower Illinois Rivers (Simons, et al., 1975) <br />(2) Upper Mississippi and Lower Chippewa Rivers (Simons & Chen, 1976 & <br />1977; Simons et al., 1979; Simons & Chen, 1979; Chen & Simons, 1980) <br />(3) Lower Mississippi River (Simons & Chen, 1978) <br /> <br />3. Basi c Concepts: <br /> <br />This model was developed for simulating one-dimensional, gradually- <br />varied, unsteady, water and sediment flows in complicated river networks. The <br />principal assumptions included in this model are as follows: <br />