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X-WR-CALNAME:International Association of Hydrogeologists Australia
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X-WR-CALDESC:Events for International Association of Hydrogeologists Australia
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TZID:Australia/Perth
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DTSTART:20240101T000000
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DTSTART;TZID=Australia/Perth:20250610T173000
DTEND;TZID=Australia/Perth:20250610T190000
DTSTAMP:20260404T165800
CREATED:20250605T042853Z
LAST-MODIFIED:20250605T042936Z
UID:40826-1749576600-1749582000@www.iah.org.au
SUMMARY:IAH - June Tech Talk
DESCRIPTION:Title: Unmasking Groundwater Signals in an Urban Estuary\n\n\n\nPresented by: David Harris \nProduced by: IAH NSW \nDate: Tuesday 10 June 2025\nTime: 17:30 for an 18:00 start\nWhere: WSP Office – Level 27\nOnline: Teams link \nAbstract: \nUrban estuaries represent highly dynamic and intricate environmental systems\, characterized by the confluence and mixing of freshwater from riverine and groundwater sources with saline tidal inflows. This complexity is further amplified by episodic\, and often contaminant-laden\, stormwater runoff\, a hallmark of urban landscapes. Each of these contributing water sources possesses distinct chemical signatures; however\, these signatures frequently overlap\, particularly in environments subjected to extensive anthropogenic pressures. The task of isolating and quantifying the groundwater component\, often referred to as Submarine Groundwater Discharge (SGD) when it enters estuaries\, is of paramount importance to quantifying catchment dynamics. Understanding SGD is critical for accurately assessing nutrient budgets\, delineating contaminant transport pathways\, and evaluating the overall ecological health and resilience of estuarine ecosystems. The process of urbanization introduces a wide array of anthropogenic contaminants into the hydrological cycle\, profoundly altering natural geochemical baselines and making the differentiation of water sources a formidable challenge. The very nature of urban development\, with its impervious surfaces and modified drainage networks\, often leads to what can be termed an “urban geochemical signature”. This talk will explore the potential for using standard water quality parameters (trace metals\, major ions\, nutrients\, and physico-chemical parameters) to differentiate groundwater from tidal inflows\, freshwater (riverine) inflows\, and stormwater runoff within the context of an urban estuary. \n  \nBio: \nDavid is a hydrogeologist and water management specialist with fifteen years’ experience in environmental consulting. David graduated from the University of Plymouth (UK) in 2009 with a Masters in Geology and subsequently went on to complete a Masters in Hydrogeology from Newcastle University (UK). During his career David has worked throughout Australia and the UK supporting groundwater\, surface water and contaminated land projects; providing advice on contaminant fate and transport\, groundwater-surface water interactions\, dewatering-discharge assessments\, environmental licensing\, remediation\, and integrated water management. David has spent the past 9 years based in Sydney\, NSW\, where he has contributed technical advice to delivery of major construction projects including the M6\, M8\, Sydney Metro Tunnelling Packages\, WestConnex\, and Western Sydney Airport. David is Certified Environmental Practitioner and Director of Hydroview Consulting\, a specialist water advisory consultancy based in Sydney\, NSW. In his spare time David enjoys the trials of gardening\, and home hydroponics.
URL:https://www.iah.org.au/event2/iah-june-tech-talk_2025/
LOCATION:NSW
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DTSTART;TZID=Australia/Perth:20250428T080000
DTEND;TZID=Australia/Perth:20250428T170000
DTSTAMP:20260404T165800
CREATED:20250428T072433Z
LAST-MODIFIED:20250428T072842Z
UID:40797-1745827200-1745859600@www.iah.org.au
SUMMARY:IAH NSW - May Tech Talk
DESCRIPTION:Title: Innovation in Open Pit Mine Water Management using Inground Barriers\nPresented by: Ron Colman \nProduced by: IAH NSW \nDate: Tuesday 06 May 2025\nTime: 17:30 for an 18:00 start\nWhere: WSP Office – Level 27\nOnline: Link to be provided closer to the date \nAbstract: \nAn ongoing impediment to successful open pit mine water management is successful control of the groundwater flow system intersected by the pit and the volume of water that needs to be managed and disposed of in the dewatering process.  The risk to receptors\, mainly groundwater dependent ecosystems (GDEs)\, is also identified as a high-level issue in many current Environmental Risk Assessment investigations evaluating the project risk either from dewatering or reinjection of excess dewatering. \nPolymer-Based Emulsion (PBE) grout was developed in the 1970s and first used to seal high pressure\, high-rate water inflows into deep subsurface South African mines. The PBE grouting system (grout and injection service) is marketed under the trade-name NOH2O®. Since the 1980s\, PBE has also been applied in mines in Namibia\, the UK\, Australia\, Zimbabwe\, Botswana\, Zambia\, the United States\, Canada and Russia. PBE has successfully sealed discrete inflows higher than 200 L/sec at pressures up to 2\,900 psi\, rendering it one of the few viable grout options for high-flow rate and high-pressure water leaks. The success of PBE as a water-sealing grout is attributed to its unique physical properties. \nIn recent years\, PBE has found application beyond its roots in mining. Municipalities with leaking subsurface infrastructure have benefited from the water-sealing properties of PBE. The grout is now being successfully applied to leaks in subway tunnels and other underground infrastructure in the USA\, Canada\, Australia and Asia. \nThis presentation provides an overview of mine water sealing along with tunnelling experience. \nBio: \nRon is a hydrogeologist with a specific focus in providing pragmatic water management solutions incorporating applied principles of hydrogeology\, geology and engineering. His extensive experience relates to projects involving small to large scale water supply development from groundwater resources\, mine dewatering and excess water disposal\, regional hydrogeological investigations and overall mine groundwater management\, licensing\, and compliance reporting. Ron has worked as a consultant\, inhouse mine water manager and studies leader within Government. \nHe will be proposing a new approach to control open pit groundwater inflows (as BAU is not working in an increasing number of operations). There is a viable way to install targeted inground barriers using proven technology that helps control and reduce open pit groundwater inflows. The barriers are site specific using existing\, well proven inert polymer and geopolymer materials. Think “keyhole surgery with geological glue”. \nRon is the IAH National treasurer and has been an IAH member since 1984!
URL:https://www.iah.org.au/event2/iah-nsw-may-tech-talk_2025/
LOCATION:NSW
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BEGIN:VEVENT
DTSTART;TZID=Australia/Perth:20250401T080000
DTEND;TZID=Australia/Perth:20250401T170000
DTSTAMP:20260404T165800
CREATED:20250401T031104Z
LAST-MODIFIED:20250401T031104Z
UID:40785-1743494400-1743526800@www.iah.org.au
SUMMARY:IAH NSW – April Tech Talk
DESCRIPTION:
URL:https://www.iah.org.au/event2/iah-nsw-april-tech-talk/
LOCATION:NSW
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