Water Advocacy Task Water Advocacy Task Force Presentation Force Presentation Source Water Utilization Tool Source Water Utilization Tool March 27, 2008 March 27, 2008
Presentation Outline � Review of WATF Recommendation Review of WATF Recommendation � � Source Water Utilization Goals Source Water Utilization Goals � � Approach Approach � � Interested Parties Interested Parties � � Historical Data & Document Reviews Historical Data & Document Reviews � � Development of SWU Tool Development of SWU Tool � � Overview of SWU Tool Overview of SWU Tool � � Discussion Discussion �
Recommendation by WATF “…the City should adopt a water source use the City should adopt a water source use “… management plan to ensure optimal use of all management plan to ensure optimal use of all surface and groundwater sources available to the surface and groundwater sources available to the City. Municipal, industrial, natural resource, and City. Municipal, industrial, natural resource, and recreational uses should be considered in the recreational uses should be considered in the development of the plan. development of the plan. � This approach: This approach: � � Maximizes resources in drought and wet Maximizes resources in drought and wet � periods periods � Provides the necessary flexibility for operation Provides the necessary flexibility for operation � � Protects water supplies for the future Protects water supplies for the future �
Source Water Utilization Surface Surface Wells Peak Water Water Galleries Galleries Demand Galleries Surface Wells Water Wells Current Portfolio Portfolio Portfolio # 1 # 2 (Dry Year) (Wet year) • Portfolio # 1 utilizes aquifer storage when necessary (drought) • Portfolio # 2 allows aquifer to recharge during wet periods
Historical Pactola Levels
Historical Aquifer Levels USGS 440326103180702 MADISON AQUIFER OBSERVATION WELL NEAR JACKSON SPRINGS 3440 WATER LEVEL ALTITIUDE IN FEET 3430 3420 3410 3400 3390 3380 Jan-99 Jan-00 Jan-01 Jan-02 Jan-03 Jan-04 Jan-05 Jan-06 Jan-07 Jan-08 DATE
Source Water Utilization Surface Surface Wells Peak Water Water Galleries Galleries Demand Galleries Surface Wells Water Wells Current Portfolio Portfolio Portfolio # 1 # 2 (Dry Year) (Wet year) • Portfolio # 1 utilizes aquifer storage when necessary (drought) • Portfolio # 2 allows aquifer to recharge during wet periods
Goal of SWU Tool � Provide a Provide a simple simple and and useful useful tool that tool that � will allow the operational staff to will allow the operational staff to optimize use of the City’ ’s raw water s raw water optimize use of the City resources, while considering the resources, while considering the needs of all interested parties. needs of all interested parties.
Approach � Identify Interested Parties Identify Interested Parties � � Collect documents and review Collect documents and review � agreements agreements � Determine variables of interest Determine variables of interest � � Analyze historical data Analyze historical data � � Develop scoring methods Develop scoring methods �
Interested Parties � For the purposes of this tool, For the purposes of this tool, � Interested Parties were defined as were defined as Interested Parties entities that: entities that: � Have water use or source water Have water use or source water � agreements with the City agreements with the City � Can be directly impacted by the City Can be directly impacted by the City’ ’s s � use of water rights use of water rights � Can directly impact the City Can directly impact the City’ ’s ability to s ability to � use their water rights use their water rights
Interested Parties � City of Rapid City City of Rapid City � � Water customers Water customers � � South Dakota Game Fish & Parks South Dakota Game Fish & Parks � � Pactola Pactola Marina & Recreation Marina & Recreation � � U.S. Bureau of Reclamation U.S. Bureau of Reclamation � � U.S. Geological Survey U.S. Geological Survey � � South Dakota Department of South Dakota Department of � Environment and Natural Resources Environment and Natural Resources
Interested Parties (cont.) � Rapid Valley Sanitary District Rapid Valley Sanitary District � � Rapid Valley Irrigators Rapid Valley Irrigators � � C&J Sanders, Inc. C&J Sanders, Inc. � � Ellsworth AFB Ellsworth AFB � � Chapel Valley Water District Chapel Valley Water District � � Other Madison Aquifer Users Other Madison Aquifer Users �
Documents Reviewed � Pactola Pactola Agreement Agreement � � Deerfield Contract Deerfield Contract � � Bureau of Reclamation Reservoir Bureau of Reclamation Reservoir � Operating Criteria (portion) Operating Criteria (portion) � Rapid Valley Sanitary District Rapid Valley Sanitary District � � Agreements & Correspondence Agreements & Correspondence � � C&J Sanders C&J Sanders � � Agreement & Correspondence Agreement & Correspondence � � Pactola Pactola Level & Release Data Level & Release Data � � USGS Stream Gauge Data USGS Stream Gauge Data � � Precipitation Data Precipitation Data �
Variables of Interest � Level in Level in Pactola Pactola � � Precipitation Precipitation � � Stream Flow Stream Flow � � Gauging station near packing plant Gauging station near packing plant � � Date Date � � Pactola Pactola Agreement & Usage Agreement & Usage � � Pactola Pactola Minimum Releases Minimum Releases � � Water Demand Water Demand � * All other variables evaluated were determined * All other variables evaluated were determined to be dependent on one of these variables to be dependent on one of these variables
Overview of SWU Tool � Operators input values for each variable Operators input values for each variable � and select the sources available for use and select the sources available for use � Tool calculates a score for each variable Tool calculates a score for each variable � based on: based on: � Historical data Historical data � � Time of year Time of year � � Agreements with other entities Agreements with other entities � � Other constraints (i.e. minimum creek flows) Other constraints (i.e. minimum creek flows) � � Scores are tallied and used to indicate Scores are tallied and used to indicate � quantity of surface vs. groundwater to use quantity of surface vs. groundwater to use
SWU Tool Variable Inputs
Precipitation Scoring
Pactola Level Scoring
Creek Flow Scoring
Creek Flow Scoring
SWU Output
SWU Tool Summary � Tested Model Using 108 Different Tested Model Using 108 Different � Scenarios Scenarios � Includes extremes, wet & dry years Includes extremes, wet & dry years � � Operator/User Friendly Operator/User Friendly � � Minimal Supervisor Maintenance Minimal Supervisor Maintenance � � Historical data updated monthly Historical data updated monthly � All Interested Parties and the City will Interested Parties and the City will All benefit from this tool through better benefit from this tool through better utilization of the water resources! utilization of the water resources!
Questions & Discussion
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