Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 671 - MAXIMUM SETBACK ZONE FOR COMMUNITY WATER SUPPLY WELLS
Subpart C - REQUESTS FOR AGENCY REVIEW AND CONFIRMATION
Appendix C - Todd Uniform Flow Equation
Universal Citation: 35 IL Admin Code ยง C
Current through Register Vol. 48, No. 38, September 20, 2024
If hydrogeologic information (e.g., transmissivity, porosity, hydraulic gradient, hydraulic conductivity, and saturated thickness of the aquifer) is available the lateral area of influence can be calculated for unconfined/confined unconsolidated or non-fractured bedrock aquifers as follows:
The distance to the upgradient divide is established as the distance to the upgradient regional groundwater divide.
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