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  • Download the free trial version(s)
  • Add software to your cart and check out
  • License key to be sent via email
  • Includes 100% money-back guarantee

Watershed modeling, detention pond design and much more. Includes customizable, on-screen routing diagram. Point and click your way through complex watersheds. Create runoff hydrographs, combine, route and divert hydrographs.

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Single-Seat License $495.00
Unlimited Site License $995.00
Site License Upgrade $495.00

This is better storm sewer design software. Time-tested methodologies coupled with automated design & analysis. It offers real-time interaction during design and provides true energy-based HGL/EGL calculations; graphic rich surface and profile plots; flexibility and speed. Awesome reporting insures that it is agency-friendly.

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Choose a License

Single-Seat License $495.00
Unlimited Site License $995.00
Site License Upgrade $495.00

Replace your outdated culvert design software with something new and better. Culvert Studio offers a rich user experience with rock-solid, time-tested results. Model culverts with a variety of shapes, sizes, slopes, inlet configurations and materials. Flow regimes include subcritical and supercritical flow with hydraulic jumps and overtopping flow.

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Choose a License

Single-Seat License $295.00
Unlimited Site License $595.00
Site License Upgrade $295.00

At last, a stand-alone open channel modeling program that combines sophisticated methodologies with an outstanding user-interface. All inclusive, models open channels with bridges, bridge scour, culverts and inline weir structures. Excellent graphics and reporting.

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Choose a License

Single-Seat License $395.00
Unlimited Site License $795.00
Site License Upgrade $395.00


Standardize your firm’s capabilities and impress your clients and reviewers with a full suite of H&H software.

Bundle includes Hydrology Studio, Stormwater Studio, Culvert Studio and Channel Studio.

Choose a License

Single-Seat License $995.00
Unlimited Site License $1995.00
Site License Upgrade $995.00


How do I install the software?

Installation is a piece of cake. Just click on any of the “Download Free Trial” links throughout this website. You’ll be asked to first setup your account with a username, password, etc. After that, just click the [Install] button.

The software will automatically download and install itself… takes about 5 seconds. You’ll see a new shortcut icon on your desktop and you’ll be ready to run the software.

Stormwater Studio, Channel Studio and Culvert Studio will automatically open with a sample project for you to play around with.

What’s the difference between Single-Seat and Unlimited Site licenses?

Both licenses are perpetual. They never expire. The Single-Seat allows for a single installation and can be run only on one PC. The Unlimited Site License allows you to install and run the software, concurrently, on any number of PCs at your physical site. Several users can be operating the software at the same time.

If I purchase a Single-Seat license today can I upgrade it later to a Site license?

Yes. You can upgrade your Single-Seat purchase anytime to a Site License. Just order the Site License Upgrade on this page. Within 24 hours of your purchase your existing Activation Code(s) will be converted to a Site License where you can install and activate as many seats at your location as you wish.

Do I have to install a license server to manage the Site license?

No. Everything is managed on our end. What’s even better is that you’ll be able to use a single activation code for all of your installations. An internet connection is required at the time of activation.

Is there an annual maintenance fee?

Yes. It’s optional, but highly recommended. Hydrology Studio’s Maintenance is a simple, cost-effective way to make sure you are always on the latest version. You’ll receive automatic free software upgrades and priority technical support.

During your check-out you will be prompted to add Annual Maintenance to your cart. The annual cost is 20 percent of the purchase price. For example, the maintenance for Hydrology Studio is $99/yr.

How often do you upgrade the software?

Very often. You can expect an update on your software about every three months, provided you add the optional annual maintenance to your purchase at check-out.

How do I get the updates?

It’s automatic. Your software checks for new updates each time it’s launched. If one is available, you will be prompted to update. Just click [Ok] and seconds later your software will start as usual, but will be the latest version.

What are the limitations of the Trial Versions?

The Trial versions have some minor functional limitations. For example, you will not be able to save any of your project files. All printed reports will be watermarked. There will also be limits as to the total number of hydrographs, pipes, channel sections, etc. However, you will certainly be able to give them a good test run. There is no time limit.

What forms of payment can I use to purchase?

We accept all major credit cards including Visa, MasterCard, American Express, Discover, checks and PayPal.

How long before I receive my activation code?

Our online store is fully automated, so you will receive your activation codes instantly via email after you place an order by credit card or PayPal.

If for some reason you have not received your email please contact us to find out the status of your order.