Resilient Cities and Groundwater

• groundwater is a major source of urban supply worldwide and aquifer storage represents a key resource for achieving water-supply security under climate change and extended drought
• private waterwell construction for urban in-situ self-supply tends to escalate as a ‘coping strategy’ during periods of inadequate utility water service, but then waterwell use often continues for years as a ‘cost-reduction strategy’
• urbanisation greatly modifies the ‘groundwater cycle’ with marked impacts – including periods of declining aquifer pressures (which can cause land subsidence with building and infrastructure damage) and periods of rising water-table (which can lead to groundwater flooding with public health hazards
and infrastructure damage)
• in the developing world, in-situ sanitation can present a significant groundwater quality hazard which needs more proactive and integrated management
• groundwater is often the ‘invisible link’ between various facets of the urban infrastructure, tending to affect ‘everybody’ whilst all too often being the responsibility of ‘no body’

Ken Howard
Ricardo Hirata
Kelly Warner
Radu Gogu
Daniel Nkhuwa