Balancing water supplies with growing demands
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Balancing Water Supplies with Growing Demands. Vic Kelson, P h . D. Layne Hydro, a division of Layne Christensen Company. Outline. Introduction Water availability Water demands Water supply management Engineered systems. Introduction. Why is water supply management necessary?.

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Balancing water supplies with growing demands l.jpg

Balancing Water Supplies with Growing Demands

Vic Kelson, Ph.D.

Layne Hydro,

a division of Layne Christensen Company


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Outline

  • Introduction

  • Water availability

  • Water demands

  • Water supply management

  • Engineered systems


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Introduction

Why is water supply management necessary?


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Economic Development Impact

  • National

    • Southwest and southeast

  • Regional

    • Great Lakes

  • Local

    • Greensburg, Indiana


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Water AvailabilitySurface water & Groundwater

Availability

Annual/Seasonal Variation

Water Quality

Impacts


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Water Availability: Rivers, Streams, Reservoirs


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Water Availability:Groundwater

Bedrock Aquifers

Sand & Gravel Aquifers




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Limits Water Availability:Seasonal Variations & Drought


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Limits Water Availability: Other Factors

  • Groundwater withdrawals

  • Well interference

  • Wastewater assimilation

  • Recharge



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Increases Water Availability

  • Water conservation

  • Water reuse

    • Graywater use

    • Nonpotable use

    • Aquifer recharge

Light purple pipes distinguish a reclaimed water distribution system from a potable water distribution.


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Water Demand

Total Water Use

Water Use by County

Future Demand


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Water Demand: Total Water Use


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Water Demand:

Water Use

by County


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Water Demand: Future Use

  • Fastest growing counties in U.S. & Indiana

  • Surface water supplies will be fully developed by 2020 (Malcolm Pirnie, 2005)


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Water Supply Management Approaches

Individual Management

Regional Planning

Water Consortium

Regionalization


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Water Management Examples

  • Individual Management

    • Central Indiana

  • Regional Planning

    • Twin Cities and Northeastern Illinois

  • Water Consortium

    • Cincinnati, Ohio

  • Regionalization

    • State of Florida Water Districts


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Engineered Systems

It’s not only a planning problem


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Source of Supply

  • Conservation

  • Production and distribution efficiency

  • Enhanced recharge

  • In-ground storage, aquifer storage and recovery


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Conservation

  • End-user efficiency

    • Re-design our usage patterns optimize usage

  • Reuse and recycled water

    • Grey water systems?

    • Waste water for non-potable uses?

    • Infiltration or enhanced recharge for recycling?


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Efficiency

  • Optimize process designs for process efficiency

    • Think in terms of the entire operational life

    • Minimize energy costs

    • Reduce chemical feeds

  • Develop strategies for operational management

    • Improved SCADA

    • Distributed process control and optimization

  • Intelligent distribution systems?


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Induced recharge systems

  • Essentially, a re-engineered surface water intake

    • Improved reliability at low flow and in drought

    • Pre-treats surface waters by river bank filtration

  • Wellfield design is crucial

    • Optimize water-quality for the problem at hand

    • Implement operational plans


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Storage and ASR

  • Are gravel pits suitable for storage?

    • Design RBF systems for reliability, reduced risk?

  • Is ASR feasible?

    • Store water when demand is low

    • Pump water when demand is high

    • Economics?


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Questions?

Thank You


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