Survey of Ozaukee South Beach Bluff, Wisconsin, May 2018

High lake levels are reducing beach area along the Lake Michigan coastline and
allowing wave action to erode the bases of coastal bluffs at the highest rate of the past 30 years.
Sediment budget calculations have shown that bluff erosion is the dominant source of sand and
gravel-sized particles that are mobilized into beaches and the nearshore system. Researchers
have found that the leading cause of bluff erosion is shallow to intermediate depth translational
landslides. Therefore, estimating lake sediment budgets depends on an understanding of the
mechanisms that lead to landslide failure. This study will provide a comprehensive analysis of
bluff stability for bluffs affected by landslide failure coupled with an analysis of bluff
composition to determine the composition of sediment contributions of coastal bluffs to the
southeast Lake Michigan sediment budget.

高湖水位正在减少密歇根湖海岸线的沙滩面积，并使得波浪作用以过去30年中最高的速率侵蚀海岸悬崖的基础。根据沉积物预算计算，悬崖侵蚀是沙粒和砾石大小颗粒进入沙滩和近岸系统的主要来源。研究者们发现，浅层至中等深度的滑动式滑坡是悬崖侵蚀的主要原因。因此，估计湖沉积物预算取决于对导致滑坡失败的机制的理解。本研究将对受滑坡失败影响的海岸悬崖的稳定性进行全面分析，并结合对悬崖成分的分析，以确定海岸悬崖对密歇根湖东南部沉积物预算中沉积物贡献的成分。