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Clinton Lake Sedimentation. Earl Lewis Kansas Water Office. History of Clinton Lake. Multipurpose operation - November 30, 1977 Authorized by Flood Control Act of 1962 Water supply storage included at request of State of Kansas under 1958 Water Supply Act - 89,200 AF

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clinton lake sedimentation

Clinton Lake Sedimentation

Earl Lewis

Kansas Water Office

history of clinton lake
History of Clinton Lake
  • Multipurpose operation - November 30, 1977
  • Authorized by Flood Control Act of 1962
  • Water supply storage included at request of State of Kansas under 1958 Water Supply Act - 89,200 AF
  • U.S. Fish & Wildlife requested storage for low flow augmentation - 21,200 AF
sediment allocation
Sediment Allocation
  • Original 100 year sediment allocation 28,500 AF, or 285 AF/year
  • Sediment allocation
    • 19,000 AF - conservation pool
    • 9,500 - flood control pool
  • 1991 Corps survey showed 296 Af/yr loss in conservation pool
  • Virtually no loss in flood pool
yield analysis
Yield Analysis
  • Water Marketing Act requires that Kansas Water Office be able to deliver water through a drought having a 2% chance of recurrence in any one year
  • By regulation, defined as a repeat of the 1952-1957 drought period
yield analysis1
Yield Analysis
  • Major factors in yield analysis
    • Inflow
    • Evaporation
    • Sedimentation (storage available)
    • Downstream senior water right holders
    • Low flow releases
water quality
Water Quality
  • Kansas Biological Survey report that indicates flats developed by siltation causing additional algae blooms and water quality concerns.
  • During low flow periods decomposition of the algae blooms cause taste and odor problems.
potential ways to deal with sediment
Potential Ways to Deal with Sediment
  • Reduce sediment load coming into lake
  • Raise conservation pool level to offset uneven sediment distribution
  • Dredge sediment in lake
watershed restoration and protection strategy
Watershed Restoration and Protection Strategy
  • Developed by a committee of local stakeholders, sponsored by the Kaw Valley Heritage Alliance
  • City of Lawrence, county conservation districts, the Natural Resources and Conservation Service, K-State Extension, Health and Environment, and the Biological Survey
  • Recommendations to reduce sediment and associated pollution from both agricultural and urban sources
watershed restoration and protection strategy1
Watershed Restoration and Protection Strategy
  • Current activity is development of a plan to identify and restore eroding stream banks in the Deer Creek watershed
  • Stream bank restoration will reduce sedimentation into the lake
storage reallocation
Storage Reallocation
  • State contract with Corps requires storage reallocation if sediment distribution incorrect
  • Move flood to conservation storage
  • Reallocation costs approx. $1,000,000
  • Plus mitigation costs
  • Currently underway at John Redmond
kansas water authority lake restoration policy
Kansas Water Authority Lake Restoration Policy
  • Approved November 2004
  • Conduct small lake dredging project
  • Review El Dorado and Oologah studies
  • Develop predictive model for determining the occurrence and duration of algal blooms
  • Clean Drinking Water Fee should be used as one funding source for restoration projects
dredging
Dredging
  • South Dakota small lakes program - $5,600/AF
  • At 296 AF/year loss - $1.66 million/year to keep up
summary
Summary
  • Clinton Lake conservation pool is silting in 36% faster than anticipated.
  • Clinton Lake as a whole is silting in only 11 AF/year faster than projected.
  • Reallocation under the federal contracts will keep design water supply capacity whole through the year 2073.
summary1
Summary
  • First action - reduce sediment load into lake
  • City of Lawrence should continue and increase WRAPs efforts
  • Dredging potentially solves both quality and quantity issues
  • Dredging is more expensive than other alternatives