Dry Well Size Calculation 1

[Baz59]

We need to construct a dry well in a poorly graded sandy soil (SM), the Mechanical Engineers discharge calculation is 101559 liters/15minutes, what we require is the formula for calculating the size of and depth of dry well required.
any help will be greatly appreciated, the building in question is a large recreational facility

 

[cvg]

there really is no formula, sizing is generally dependant on local conditions and you can get a good idea by talking to a local driller who installs dry wells. Final capacity must be confirmed based on percolation tests of the well after construction. In addition, you may want to construct a retention basin to handle some of the volume to reduce the size or depth of the well required.

Around here, drywells are designed with an allowable 36-hour period for disposal. A maximum disposal rate of 0.1 cubic feet per second (cfs) is often used for estimating the number of drywells required.

 

[CarlB]

Sure, there are formulas for just about everything
The harder part is getting good data to plug into them.

Here's a source for formulas:

AN APPROACH FOR ESTIMATING INFILTRATION
RATES FOR STORMWATER INFILTRATION DRY
WELLS

http://www.wsdot.wa.gov/NR/rdonlyres/D5CD84EB-C8FE-4E48-B512-BD70A055A5A2/0/MassmanRptFinal.pdf