Aquifer Vulnerability using Recharge, Depth to Groundwater ...
Groundwater Recharge, Flow and Inter-Aquifer Leakage · Groundwater Recharge, Flow and...
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Groundwater Recharge, Flow and Inter-Aquifer Leakage NAIS Community Commi@ee Wednesday 10 th February 2016
Transcript of Groundwater Recharge, Flow and Inter-Aquifer Leakage · Groundwater Recharge, Flow and...
GroundwaterRecharge,FlowandInter-AquiferLeakage
NAISCommunityCommi@eeWednesday10thFebruary2016
Overview
• aquifertypes• rechargeandgroundwaterflow• drawdownbypumpingbores• inter-aquiferleakage• boreconstrucLon• transportofinjectedrecycledwater
TwomaintypesofAquifers
DiffuseflowPreferenLalorbypassflow
e.g.macropores,fractures,karst
POROUSMEDIAe.g.,sandstone
DUAL-POROSITYMEDIAe.g.,fracturedshaleorkarstlimestone
Groundwater Recharge
Groundwater Recharge
• Recharge may be defined as # “the entry of water into the saturated zone at the water table”
• Diffuse recharge: – widespread percolation through the soil zone
• Localised recharge: – focused due to water source or geology – streams – within bank and overbank flooding – karst features (e.g., sink holes etc.)
# Freeze and Cherry (1979)
RechargeisonlyasmallfracLonofRainfall
Leaney et al. (2011)
GroundwaterintheHydrologicCycle
GroundwaterFlowSystems
GroundwaterFlowSystems
GoyderInsLtuteProject:AssessmentofAdelaidePlainsGroundwaterResources
Groundwatermovesveryslowly!
Carbon-14acLvityofgroundwatersamples(GoyderInsLtuteProject:AssessmentofAdelaidePlainsGroundwaterResources)
DrawdownaroundPumpingBores
Inter-aquiferLeakage
GroundwaterManagementObjecLves
• Long-termresourceavailability• MaintaininggroundwaterthroughflowtopreventsalinisaLon“hotspots”
• Maintaininggroundwaterthroughflowtopreventseawaterintrusion
• Maintainingaquiferpressuretopreventinter-aquiferleakageofwater/salts
• MARisoneopLonthatmayhelpachievetheseobjecLves
WaterBoreConstrucLon
• MandatoryRequirement• GoodIndustryPrac5ce
MinimumRequirementsforWaterBores
Unconfinedaquiferbore Confinedaquiferbore=injec5onbore
InjecLngRecycledWater
PredicLngmovementofthefreshwater“bubble”
• Environmentaland/orappliedtracers
• Solutetransportmodelling
• Monitoring
InjecLonWell
AquifercharacterisaLonforMAR• Keyknowledgerequired:
– AquiferphysicalproperLes(K,T,S)– AquifersalinitycharacterisLcs&chemicalproperLes
(mineralogy,groundwaterchemistry,redoxetc.)• Proventechniques:
– Aquiferpumpingtests– Aquifercoreanalysis– Groundwatersamplingandanalysis– Fieldandlaboratorytrials
• CriLcaltoestablishreliablemonitoringsystemsandmanageoperaLonsasrequired
QuesLons?
ContactDetailsDr.GlennHarringtonDirector&PrincipalHydrogeologistInnovaLveGroundwaterSoluLonsPtyLtd.Office:2/162HindmarshRoad,VictorHarborSA5211Email:[email protected]:0458636988
