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SIMPLIFIED SOLUTIONS FOR GROUNDWATER MOUNDING UNDER STORMWATER INFILTRATION FACILITIES

SIMPLIFIED SOLUTIONS FOR GROUNDWATER MOUNDING UNDER STORMWATER INFILTRATION FACILITIES,Kaveh Zomorodi

SIMPLIFIED SOLUTIONS FOR GROUNDWATER MOUNDING UNDER STORMWATER INFILTRATION FACILITIES   (Citations: 1)
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Excessive groundwater mounding under an infiltration facility could cause various problems including drainage problems, wet basements, slower recharge rates and groundwater quality problems by reduction or loss of the unsaturated layer under infiltration facilities. Both the maximum rise of the central mound and the areal extent of the mound are important for the above concerns. The common methods for prediction of mounding are complex and usually hard to apply. A study was conducted to derive new groundwater mounding equations that are simple in their structures but produce reasonable values for conditions most commonly found in stormwater infiltration facilities. This paper presents the new simplified equations and their theoretical development. The equations apply to Steady-uniform recharge rate to infinite homogenous aquifers with initially horizontal water table and bedrock surfaces. Separate sets of equations are derived for recharge strips (infiltration channels/trenches) and infiltration basins (round or rectangular facilities). Both equation sets require minimum input data in terms of the size and shape of the facility, the properties of the saturated layer and the recharge rate and are convenient for routine engineering calculations. Example applications of the two sets of equations for the conditions typical in New Jersey are presented. KEY TERMS: infiltration facilities, groundwater mounding, stormwater management, BMP, Low Impact Development.
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