High-resolution lake and reservoir bathymetric surveys can pinpoint locations that may experience underwater landslides (subaquatic sedimentary mass movements). These can pose a risk to underwater and shoreline infrastructure. This paper outlines an approach for using spatial variation in sedimentary patterns to identify areas susceptible to subaquatic mass movements in lakes and reservoirs. This study focusses on Lake Biel (Switzerland), which has experienced a protracted history of upstream alteration of river flow. Altered flow patterns increase risk of unstable sedimentary features and subaquatic mass movements. Data from sediment traps and cores, Acoustic Doppler Current Profilers and results from a 3D hydrodynamic model gave a consistent picture of spatial and temporal variation in weather-related sedimentation. Erosion caused by short-term rain events contributes the largest proportion of sediments to the lake. Strong rain events combine with typical wind patterns to drive lake circulation. The net effect results in preferential sedimentation onto a steeply sloping shelf prone to subaquatic slides. The integrated approach outlined here incorporates short- and long-term sediment dynamics to provide a systematic assessment of lake sedimentation and potential mass movement hazards. This research represents a first step in developing a risk-evaluation tool for aquatic hazard evaluation.

高分辨率的湖泊和水库测深调查可以查明可能经历水下滑坡（水生沉积物运动）的位置。这些可能对水下和海岸线基础设施构成风险。本文概述了一种利用沉积物样式的空间变化来识别易受湖泊和水库中亚水底物质运动影响的区域的方法。这项研究的重点是比尔湖（瑞士），该湖经历了漫长的上游河流水流变化历史。流动模式的改变会增加沉积特征不稳定和水下水质运动的风险。来自沉积物陷阱和岩心，声学多普勒电流剖面仪的数据以及来自3D水动力模型的结果，给出了与天气有关的沉积物的时空变化的一致图片。短期降雨事件造成的侵蚀使湖泊中的沉积物占最大比例。强烈的降雨事件与典型的风型相结合，推动了湖泊的循环。净效应导致优先沉降到易于发生水底滑坡的陡坡架子上。这里概述的综合方法结合了短期和长期的沉积物动力学，以提供对湖泊沉积物和潜在的物质运动危害的系统评估。这项研究代表了开发水生危害评估风险评估工具的第一步。这里概述的综合方法结合了短期和长期的沉积物动力学，以提供对湖泊沉积物和潜在的物质运动危害的系统评估。这项研究代表了开发用于水生危害评估的风险评估工具的第一步。这里概述的综合方法结合了短期和长期的沉积物动力学，以提供对湖泊沉积物和潜在物质移动危害的系统评估。这项研究代表了开发用于水生危害评估的风险评估工具的第一步。