Real-time groundwater monitoring of a quarry reclamation within the City of Guelph for source water protection

对圭尔夫市采石场围垦的地下水进行实时监测，以保护水源

• 批准号: 568604-2021
• 负责人: Munn, JonathanJD
• 金额: $ 24.11万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=753158
• 关键词: Real; time; groundwater; monitoring; quarry

Quarry and other large-scale landscape modification operations involve excavation and removal of earth material that when otherwise left intact provides natural protection against groundwater pollution. Thus, when a quarry is deepened, it is critical to investigate the impact on the groundwater system. This is particularly true when the material being excavated is fractured rocks that by their nature are more prone to contamination because these fractures can act as a direct connection between the surface and groundwater. Thus, landscape modifications can greatly affect groundwater quality and therefore, there is a global need to understand these impacts. In this context, the Dolime Quarry represents an ideal research site to further scientific understanding of this problem. This quarry is located within 2.5 km of 8 active municipal water supply wells in Guelph (pop. 135,000), and excavations have breached the main aquitard (a low permeability geological formation) that protects the city's primary water supply aquifer. This breach makes the city's water supply vulnerable to pathogens, viruses or other contaminants if not appropriately managed. The city is proposing to take control of the quarry dewatering operation to manage this threat, but careful measurement, monitoring, and testing programs are needed to mitigate future contamination risks. To address this problem, the study requires datasets of higher spatiotemporal resolution than possible with conventional approaches. The research will deploy state-of-the-science sensor technologies to measure near-quarry hydraulic responses, define geological and hydrogeological units, identify aquitards, and investigate possible interactions between surface water and groundwater. This research provides robust data to understand the risks all major quarries pose to groundwater and guidance on how to best manage these risks long-term in communities across Canada, where more than 3000 quarries actively impact local groundwater systems. Moreover, findings from the application of innovative tools and approaches are transferrable to other global communities that rely on fractured rock aquifers for clean drinking water, agricultural and industrial use.

采石场和其他大规模的景观改造作业涉及挖掘和移除泥土材料，否则这些泥土材料将原封不动地提供自然保护，免受地下水污染。因此，当采石场加深时，调查对地下水系统的影响是至关重要的。当被挖掘的材料是破碎的岩石时，情况尤其如此，这些岩石本质上更容易受到污染，因为这些裂缝可以作为地表和地下水之间的直接连接。因此，景观变化可能会极大地影响地下水质量，因此，全球有必要了解这些影响。在此背景下，Dolime采石场是进一步科学了解这一问题的理想研究地点。该采石场位于圭尔夫(POP)8口活跃的市政供水井2.5公里范围内。(135,000)，挖掘已经冲破了保护该市主要供水含水层的主要蓄水层(低渗透地质地层)。如果管理不当，这一漏洞使该市的供水容易受到病原体、病毒或其他污染物的影响。该市提议控制采石场的脱水作业，以管理这一威胁，但需要仔细的测量、监测和测试计划，以减轻未来的污染风险。为了解决这个问题，这项研究需要比传统方法更高的时空分辨率的数据集。这项研究将部署最先进的传感器技术来测量采石场附近的水力响应，定义地质和水文地质单位，识别含水层，并调查地表水和地下水之间可能的相互作用。这项研究提供了可靠的数据，以了解所有主要采石场对地下水构成的风险，并指导如何在加拿大各地的社区长期最好地管理这些风险，在加拿大，3000多个采石场积极影响当地地下水系统。此外，创新工具和方法的应用结果可转移到依赖破碎的岩石含水层用于清洁饮用水、农业和工业用途的其他全球社区。