Bank Filtration Designs Applied to Seawater Desalination and Aquifer Storage and Recovery Projects Thomas M. Missimer, Ph.D., P.G. Missimer Groundwater Science A Schlumberger Company
Surface Water Intake Design Issues For Reverse Osmosis Treatment Facilities
Issue Problems Water depth Intake Elevation (offshore) Water quality variations Water quality fluctuations Storm damage Damage from ship collision
Issue Problems Intake Cutoff Intake Screen Pipe Material Contamination of Source Water Clogging and maintenance Corrosion Maintenance and access
Issue Problems Intake Pump Corrosion Backup Power failure Damage potential (location) Backflushing capability
Why use natural filtration methods rather than conventional intake designs? Provides primary pre-treatment Reduces exposure to contamination Can improve raw water quality Zebra mussel issue Less risk of damage during floods Provides some protection during ` floods
Cost Advantage of Alternative Intakes Reduction in pre-treatment cost Reliability saves operating costs
Natural Filtration Methods Shallow wells (low capacity banks) Deep wells with induced vertical leakage Galleries at the riverbank edge to the interior Galleries beneath the river
Natural Filtration Methods Ranney collector wells Water tunnel concept with laterals Horizontal wells
Shallow Wells
Shallow Wells
Deep Well with Induced Filtration
Galleries at the Shoreline to the Interior River/Lake
Galleries at the Shoreline to the Interior
Galleries Beneath the Surface Water Body
Galleries Beneath the Surface Water Body
Ranney Collector Wells
Ranney Collector Wells
Ranney Collector Wells
Water Tunnel with Collectors
Water Tunnel with Collectors
Horizontal Well
Aquifer Storage and Recovery Applications Shallow vertical wells Horizontal wells Canal/Reservoir bank galleries
Shallow well for ASR intake
Shallow wells for ASR intake
Horizontal Wells for ASR System Intake Under canal or reservoir Parallel to canal or reservoir
Horizontal Well Cross-section
Galleries for ASR System Intake River/Lake
Galleries for ASR System Intake