Call Us: (866)-473-0453

A complete storm water management platform

Explore the possibilities of a Hydrologic Software Solution for Single-Event and Continuous Modelling with Visual Otthymo.

Visual Otthymo

Hundreds of satisfied customers use our software solutions for water capacity management.

Why VO

Powerful storm water management
made easy


VO has been created to provide you with a reliable and dependable model that is straightforward and easy to use.

Widely Accepted

VO is the standard model of choice for many regulatory agencies in Canada, from conservation authorities and municipalities to top consulting and engineering firms.

Expert Support

Integrated with an online help system and efficient tech support, the new VO Help System will provide invaluable assistance to all users.

Efficient Interface

VO has an improved interface that makes the model creation and interpretation of results easier and more efficient than ever.

Start Your 30-Day FREE Trial Today

Don't wait, you can start your free trial in just a couple of clicks.

All-in-One Software

Feature-packed platform to help with hydrologic flow

Single-Event Modelling

Run automated and manual design storms and actual rainfall events for water asset design and model calibration. VO can simulate runoff from statistical storm events. The hydrographs generated are based on unit hydrograph theory and can be used for calibrated or uncalibrated modelling studies.

Continuous Modelling

Seamlessly extend single event models into continuous models to conduct site and natural feature water balance calculations, generate hydrographs for erosion assessments, and more. These reliable results give the model an edge over other “parameter intensive” models, leading to reduced staff time on your projects.

Distributed Rainfall Modelling Technique

Distributed Rainfall Modelling Technique takes data from multiple rain gauges and interpolates to create rainfall “surfaces” and virtual rain gauges, increasing resolution across the study areas. This tool is useful to calibrate models covering large areas with multiple rain gauges.

GIS Capabilities

VO provides a free inbuilt map function that builds a model over an aerial photograph or drainage area plan and calculates model parameters. This increases the efficiency of the model development.

Designed for Water Resource Professionals

The Ideal Tool for Watershed Planning, Design, and Operational Management

Start Your 14-Day Free
Trial Today!

Follow the steps below to start your VO Free Trial
  1. Click on the “Download VO 6.2” button at the bottom of this popup or visit our Download page from VO hompage.
  2. Install VO. Refer to the Guide and Manual – they are useful.
  3. Email for your Demo License.
  4. We’ll send you the license file. Save the file on your computer and add it to VO License Manager.
  5. Everything is all set. Happy VO-ing!

Build – 6.2.2008