On March 24, 2017, equations for estimating harmonic mean flows, low-flow frequencies, and the probability of zero flow were added to version 3 for use in Indiana. These new equations are from the report:
Martin, G.R., Fowler, K.K., and Arihood, L.D., 2016, Estimating selected low-flow frequency statistics and harmonic-mean flows for ungaged, unregulated streams in Indiana (version 1.1, October 2016): U.S. Geological Survey Scientific Investigations Report 2016–5102, 45 p.
The new equations have not yet been added to beta version 4, which also does not yet include functionality to obtain coordinated peak-flow discharges. As a result, version 3 should be used to obtain information for ungaged sites until the needed improvements can be made to version 4.