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Updates and Release History

Following are the program updates and notes. If you have missed an update don’t worry. You can simply re-download the software from our website directly from this link:

Install Studio Express

v1.0.0.13 – July, 2022

A new task has been added… Groundwater. This task is dedicated to retention pond recovery analysis using the Simplified Analytical Method per the St. Johns River Water Management District (SJRWMD) in the state of Florida. It allows you to calculate the recovery time of both unsaturated and saturated lateral infiltration for water quality retention ponds that are influenced by a shallow sandy aquifer.


v1.0.0.12 – April, 2022

  1. Compound Weirs only. Corrects an issue that prevented entering a Known Depth larger than the lower weir depth or Known Q which produced a depth larger than the lower weir depth.

v1.0.0.11 – February, 2022

What’s New

  1. This is a security update. Hydrology Studio renews the code signing certificate every three years using the latest signature algorithm sha256RSA insuring that the software you download here is authentic and untampered with. The new Authenticode Certificate may not be recognized initially by your PC so you may see a security prompt as shown below. If so, click the “More info…” link and then click [Run anyway]. The new version will install.
This image has an empty alt attribute; its file name is Install1.png
This image has an empty alt attribute; its file name is Install2.png

v1.0.0.10 – November, 2021

What’s New

  1. Made refinements to the computations for Curb Inlets in a Sag when the Depression value significantly exceeds the Throat Height value.
  2. Minor miscellaneous user interface improvements.

v1.0.0.9 – January, 2021

What’s New

  1. RainMaps™ has been introduced! RainMaps™ is a cloud-based resource where you can download ready-to-use rainfall files for use in any of the Hydrology Studio Suite programs. RainMaps™ contains rainfall files (.idf and .pcp) you would normally set-up in the software either by direct entry of data or importing from NOAA Atlas 14. We’ve taken all of the steps required to create these files so you won’t have to. And they are available with just a couple of mouse-clicks. Learn more…
  2. We improved the calculation algorithms that generate equation coefficients for the IDF equation.

v1.0.0.7/8 – March, 2020

What’s New

  1. License Server has been updated to provide a User Account dashboard where you can view purchase history, license keys and manage your subscription.

v1.0.0.6 – August, 2019

What’s New

  1. Orifices – The software now allows you to change the orifice coefficient for each orifice rather than changing it in the Project Settings.

v1.0.0.5 – July, 2019

What’s New

  1. The software now stores your product key (Serial Number) so that you can Activate and Deactivate the License without re-entering your key each time. Three mouse clicks is all it takes.

v1.0.0.4 – March 2019

What’s New

1. You’ll now have the option to utilize the Weighted Volume method, as well as the Weighted CN method when employing Composite CNs. Learn More.


v1.0.0.2/3 – February, 2019

New Features

1. Security Update. Our software code is digitally signed and secured using the latest signature algorithm sha256RSA insuring that the software you download here is authentic and untampered with. This version simply updates our Microsoft Authenticode Code Signing Certificate and may require a couple of steps more than usual to update to this version. Please see Getting Software Updates for more information.


v1.0.0.1 – May, 2018

New Features

1. Studio Express is officially released!