Canadian Geotechnical Journal, Ahead of Print.
The thick sequences of marine clayey deposits that blanket the St. Lawrence Lowlands in south-eastern Canada are highly susceptible to landslides. With 89% of the population of the province of Quebec living in this region, improving our understanding of the mechanisms causing landslides in these sediments is a matter of public security. To accomplish this goal, instruments were deployed at a field site in Sainte-Anne-de-la-Pérade, Quebec, Canada to monitor atmospheric, soil, and groundwater conditions. Field and laboratory measurements of soil geotechnical and hydraulic properties were also performed. Results indicate that the groundwater and pore pressure dynamics at the site cannot be explained using simplified site conceptual models. Further analysis indicates that groundwater dynamics and pore pressures in the massive clay deposits on site are determined by (i) the highly heterogeneous nature of the local geological materials, (ii) the contrasting hydraulic and geotechnical properties of these materials, (iii) the presence of two unconfined aquifers at the site, one surficial and one at depth, and (iv) the presence of the Sainte-Anne River. These results were used to create a new conceptual model that illustrates the complex groundwater flow system present on site and shows the importance of including hydrogeologic context in slope stability analysis.

中文翻译：

---

复杂的尚普兰海矿床（加拿大魁北克）的水文地质学：对边坡稳定性的影响

加拿大岩土工程杂志，提前印刷。
覆盖加拿大东南部圣劳伦斯低地的厚厚的海洋粘土沉积层非常容易发生山体滑坡。由于魁北克省 89% 的人口居住在该地区，因此提高我们对这些沉积物中造成滑坡的机制的了解是一个公共安全问题。为了实现这一目标，在加拿大魁北克省 Sainte-Anne-de-la-Pérade 的现场部署了仪器，以监测大气、土壤和地下水状况。还进行了土壤岩土和水力特性的现场和实验室测量。结果表明，无法使用简化的场地概念模型来解释场地的地下水和孔隙压力动态。进一步的分析表明，现场大量粘土矿床中的地下水动力学和孔隙压力由 (i) 当地地质材料的高度异质性决定，(ii) 这些材料的水力和岩土特性对比，(iii)现场有两个无承压含水层，一个是表层的，一个是深部的，以及 (iv) Sainte-Anne 河的存在。这些结果用于创建一个新的概念模型，该模型说明了现场存在的复杂地下水流系统，并显示了在边坡稳定性分析中包含水文地质背景的重要性。一个是表面的，一个是深的，以及 (iv) Sainte-Anne 河的存在。这些结果用于创建一个新的概念模型，该模型说明了现场存在的复杂地下水流系统，并显示了在边坡稳定性分析中包含水文地质背景的重要性。一个是表面的，一个是深的，以及 (iv) Sainte-Anne 河的存在。这些结果用于创建一个新的概念模型，该模型说明了现场存在的复杂地下水流系统，并显示了在边坡稳定性分析中包含水文地质背景的重要性。