Seepage analysis of right abutment of sugar lake dam

BC水电公司的糖湖大坝位于Shuswap河上，距离BC省弗农以东约70公里。** 大坝为Shuswap福尔斯发电站 ** 的水力发电提供储存和流量调节，该发电站位于Wilsey大坝，Shuswap河下游29公里处。大坝安全是水力发电的一个关键组成部分。糖湖大坝经历了两个坝肩的意外季节性波动渗流，需要更全面的了解，以确保大坝的持续安全运行。虽然大坝周围和下方的渗漏是正常现象，但大坝运营商必须警惕可能导致坝肩或大坝本身内部侵蚀的渗透条件，因为导致管涌的内部侵蚀 ** 是大坝的常见破坏模式。因此，需要深入了解 ** 地质和几何条件对渗流条件的影响，以便 ** 及时识别和管理异常情况。拟议的研究旨在（1）收集有关基岩和地表地质以及大坝及其基础几何形状的现有数据，（2）使用无人机和基于摄影测量的测绘收集新数据，以及（3）使用这些数据为BC Hydro创建和校准三维数值渗流模型，该模型可以模拟瞬态渗流分析。

BC Hydro's Sugar Lake Dam is located on the Shuswap River approximately 70 km east of Vernon, BC. The**dam provides storage and flow regulation for hydroelectricity production at the Shuswap Falls generating**station, located at the Wilsey Dam, 29 km downstream on the Shuswap River. Dam safety is a critical**component of the production of hydroelectricity. The Sugar Lake Dam experiences unexpected seasonally**fluctuating seepage through both abutments that requires a more comprehensive understanding to ensure**continued safe operation of the dam.**While seepage around and underneath dams is a normal phenomenon, operators of dams must be vigilant for**seepage conditions that can cause internal erosion in the dam abutments or the dam itself as internal erosion**leading to piping is a common failure mode for dams. Therefore, a strong understanding of the influence of the**geological and geometric conditions on the seepage conditions is needed so that unusual conditions can be**promptly identified and managed.**The proposed research aims to (1) assemble existing data on the bedrock and surficial geology and the**geometry of the dam and its foundations, (2) collect new data using a UAV and photogrammetry-based**mapping, and (3) use the data to create and calibrate a 3D numerical seepage model for BC Hydro that can**simulate transient seepage analyses.