Water Supply Planning for Northeast Illinois

Transcription

1 Water Supply Planning for Northeast Illinois Potential Impacts on the Deep Bedrock Aquifer System Allen Wehrmann, P.E., P.H. (GW), D.WRE Head, Center for Groundwater Science Illinois State Water Survey RWSPG Meeting October 28, 2008

2 Special thanks to: Don Keefer, Dave Larson, Jason Thomason, and others Illinois State Geological Survey Scott Meyer, Yu Feng Lin, Ed Glatfelter, Derek kwinstanley, and others Illinois State Water Survey and Bill Walton (ISWS Groundwater Section Head )

3 Northeast Illinois Water Sources Graphic credit: CMAP

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6 Aquifers of Northeastern Illinois West East DeKalb Chicago Top of Ancell (St. Peter ss) Top of Ironton Galesville Unconsolidated Aquifer System ShallowBedrock Aquifer Deep Bedrock Aquifer System (Ancell and Ironton Galesville sandstones) Elmhurst Mt. Simon Aq. (saline?) Cross Section Modified from Bretz (1939)

7 11 County Northeast Illinois Water Sources Shallow Groundwater ~8.5% Deep Bedrock Groundwater ~8.5% Inland surface water sources 4% Lake Michigan 77%

8 Regional Model Domain for NE Illinois and Modeled Wells

9 Yorkville Community Water Supply Historical Water Withdraw als, million gallons per d ay

10 What is the future of the deep bedrock aquifers in NE Illinois? Lake Michigan allocations start? Groundwater wi ithdrawals, millio on gallons per da ay Walton's 1964 estimated deep aquifer yield ~ 65 mgd? 20 8 County NE Illinois Total Deep Bedrock Q

11 Distribution of Shallow and Deep Bedrock Groundwater Withdrawals in ~43 mgd from deep bedrock in 1958 ~84 mgd from deep bedrock in from Suter et al., 1959

12 250 Comparison of Deep Bedrock Withdrawals Kane County Project vs. Regional Water Supply Planning Project 11 County Totals County simulated historic deep bedrock withdrawals 50 Kane County Project Demand Scenarios (low & high) Regional Water Supply Planning Scenarios (LRI, BSL, MRI)

13 Simulated Head Surface: Lower Quaternary Unit at End of 2050 Baseline Scenario

14 Aquifers of Northeastern Illinois West East DeKalb Chicago Top of Ancell (St. Peter ss) Top of Ironton Galesville Unconsolidated Aquifer System ShallowBedrock Aquifer Deep Bedrock Aquifer System (Ancell and Ironton Galesville sandstones) Elmhurst Mt. Simon Aq. (saline?) Cross Section Modified from Bretz (1939)

15 Simulated Head Surface: Ancell Unit (St. Peter) at end of 2050 Baseline Scenario

16 Simulated Head Surface: Ironton Galesville Unit at End of 2050 Baseline Scenario

17 Location Map for Deep Bedrock Hydrographs

18 Simulated Ancell Unit Head, Maple Park Kane County Project Regional Model Results 800 Simulated Historical Head ( ) Simulated Future Head ( ), Low Pumping Scenario 700 Simulated Future Head ( ), High Pumping Scenario Head (ft above MSL) Simulated Steady-State Head, 2002 Pumping Rates and Well Configuration Top of Ancell Unit Year

19 Simulated Ironton Galesville Unit Head, Maple Park Kane County Project Regional Model Results Simulated Historical Head ( ) Simulated Future Head ( ), Low Pumping Scenario 300 Head (ft above MSL) Simulated Steady-State Head, 2002 Pumping Rates and Well Configuration Simulated Future Head ( ), High Pumping Scenario -100 Top of Ironton-Galesville Unit Year

20 Simulated Ancell Unit Head, St. Charles Kane County Project Regional Model Results 400 Simulated Historical Head ( ) Head (ft above MSL) Simulated Steady-State Head, 2002 Pumping Rates and Well Configuration Simulated Future Head ( ), Low Pumping Scenario Simulated Future Head ( ), High Pumping Scenario Top of Ancell Unit Year

21 Simulated Ironton Galesville Unit Head, St. Charles Kane County Project Regional Model Results 100 Simulated Historical Head ( ) Simulated Future Head ( ), 2049) Low Pumping Scenario 0 Head (ft above MSL) Simulated Steady-State Head, 2002 Pumping Rates and Well Configuration Simulated Future Head ( ), High Pumping Scenario Top of Ironton-Galesville Unit Year

22 Simulated Ancell Unit Head, Yorkville Kane County Project Regional Model Results Simulated Future Head ( ), Low Pumping Scenario Head (ft above MSL) Simulated Historical Head ( ) Simulated Steady-State Head, 2002 Pumping Rates and Well Configuration Top of Ancell Unit Simulated Future Head ( ), High Pumping Scenario Year

23 Simulated Ironton Galesville Unit Head, Yorkville Kane County Project Regional Model Results Simulated Historical Head ( ) Simulated Future Head ( ), Low Pumping Scenario Head (ft above MSL) Simulated Steady-State Head, 2002 Pumping Rates and Well Configuration Simulated Future Head ( ), High Pumping Scenario -400 Top of Ironton-Galesville Unit Year

24 Simulated Ancell Unit Head, Joliet Kane County Project Regional Model Results Simulated Historical Head ( ) Head (ft above MSL) Simulated Steady-State Head, 2002 Pumping Rates and Well Configuration Simulated Future Head ( ), Low Pumping Scenario Simulated Future Head ( ), 2049) High Pumping Scenario 0 Top of Ancell Unit Year

25 Simulated Ironton Galesville Unit Head, Joliet Kane County Project Regional Model Results Head (ft above MSL) Simulated Historical Head ( ) Simulated Steady-State Head, 2002 Pumping Rates and Well Configuration Simulated Future Head ( ), Low Pumping Scenario Simulated Future Head ( ), High Pumping Scenario -700 Top of Ironton-Galesville Unit Year

26 Deep Bedrock Aquifer Potentiometric Surface 2007

27 Change in Deep Bedrock Heads,

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