The Effects of Base-Level Change on Fluvial Processes, Sedimentation, and Erosion Control

该项目将解决围绕影响的争议 信道响应的基准电平变化， 上游的影响，对河谷充填沉积物的性质， 的性质和分布情况， 在不同斜坡的陆架上沉积的沉积物，由一系列的 在大型水槽中的试验研究和在一个小型冲刷试验中的试验研究 设施。 目标是确定：（a）基础的影响- 曲流河和辫状河的水位变化; B） 基准面变化的速度和幅度; c）水下的影响 通道响应的斜率; d）对于不同量级的基准面 变化，侵蚀和沉积的上游进展， 不同坡度和宽度的山谷;以及e） 坡度控制结构对河谷形态、河道稳定性和 产沙量 研究结果将应用于侵蚀控制 能减少产沙量并积极稳定 长期侵蚀陡坡

The project will address the controversy surrounding the impact of base level change on channel response, on the magnitude of the upstream influence, on the nature of valley-filled deposits associated with base-level rise, and on the nature and distribution of sedimentary deposits on shelves of different slopes, by a series of experimental studies in large flumes and in a rainfall-erosion facility. The objectives are to determine: a) the effect of base- level change on meandering and braided streams; b) the effect of the rate and magnitude of base-level change; c) the effect of subaqueous slopes on channel response; d) for different magnitudes of base-level changes, the upstream progression of erosion and deposition for valleys of different slopes and widths; and e) the long-term effect of grade-control structures on valley morphology, channel stability, and sediment yield. The results will be applied to erosion control measures that can reduce sediment yields and stabilize actively eroding steeplands for long periods of time.