(3) Groundwater Benefits: higher quality, decentralized water supply Problems: lowering groundwater table (4)Desalination Benefits: using salty water or sea water as the resource for water suppl Problems: high construction cost(e.g RO), high energy consumption (5) Relocation of water users Benefits: mitigation of regional water shortage Problems: high cost, social impact(3) Groundwater (3) Groundwater ¾ Benefits: higher quality, decentralized water supply ¾ Problems: lowering groundwater table (4) Desalination (4) Desalination ¾ Benefits: using salty water or sea water as the resource for water supply ¾ Problems: high construction cost (e.g. RO), high energy consumption (5) Relocation of water users (5) Relocation of water users ¾ Benefits: mitigation of regional water shortage ¾ Problems: high cost, social impact