Virtual Beach

"Virtual Beach" is a free software program for Windows that enables coastal beach managers, public health professionals, and applied researchers to efficiently develop and operate water-quality models to inform beach-specific decisions on:

  • Whether to issue (or lift) swim advisories/closures on a given day 
  • What type of lab test (if any) to run on a given day 
  • Where and how to prioritize long-term remediation efforts

What is Virtual Beach?

Beaches provide coastal communities with substantial economic, social and health benefits. Along the U.S. Great Lakes coast, an estimated 8 million people visit beaches each year. Unfortunately, some information commonly used to evaluate water quality, communicate health risks and prioritize remediation efforts are 24 hours old, meaning swimmers can be swimming when conditions are not safe. Conversely, swimmers may be kept out of the water when no current problems exist. Virtual Beach (VB) addresses these shortcomings.
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Should I Create A Model For My Beach?

Should I Create A Model For My Beach?

A predictive water quality model is a tool that may work wonderfully for predicting bacteria levels at your beach while both REDUCING the number of bacteria samples you need to collect during the swim season and STILL protecting public safety. However, a predictive model is not an appropriate tool for every beach.  Using predictive water quality model for a beach has both PROS and CONS.

PROS:
-The model may predict bacteria levels at your beach more accurately than yesterday’s bacteria sample results.
-Sampling costs may be reduced in the long run.
-For beaches on the Great Lakes, additional weather and stream flow data may be available to allow for models to be created for use on non-sampling days so that predictions of bacteria levels at your beach could be made every day during the swim season.

CONS:
-The model building process can be time and money intensive.
-Explaining to the public that a beach is under advisory because of a model result is often more complicated than just stating a bacteria result is over a standard.
-Models are not perfect and sometimes advisories will be issued when bacteria levels were low or not issued when bacteria levels are elevated.

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Virtual Beach Users

Users Group

The Virtual Beach Users Group (VBUG) provides a forum for sharing best practices, trouble-shooting problems, and identifying priority needs.The VBUG listserv is intended to foster communication and mutual assistance among VB users. The list is moderated by Wisconsin Sea Grant and hosted by the Great Lakes Information Network.

Subscribe to the VBU listserv




File-Sharing
A password-protected 'Box' account has been set up to provide users with a secure directory for sharing VB files with their collaborators. Typically too large to email, VB 'project' files include the beach-specific data and transformations used to build the model(s), as well as evaluation metrics and graphics, and the interface used to make predictions.


Request access to the VB Box account.




Training

Virtual Beach Step-by-Step Training Modules

Download the following five illustrated training documents to set-up, build, evaluate, and run predictive models using VB 3.0.6. The data needed to create all the models is in the zipped file below.

I.  Data Preparation (PDF)
I.A. Transformations for MLR Model (PDF)
II.   Building & Evaluating Anytime GBM Models (PDF)
III.  Building & Evaluating Sampling-Day MLR Models (PDF)
IV.  Nowcast Prediction & Validation (PDF)

Download the data and VB project files (zip file) to create and build all models described in the above documents.

Check out the step-by-step training video for the first module, Data Preparation.




2017 Chicago Workshop Presentations

In 2017, the Wisconsin Sea Grant conducted a 1-day workshop at the Chicago Parks District office on using Virtual Beach. Support for this workshop came from the Great Lakes Observing System (GLOS). The presentations from the workshop are below.
Chicago 2017 Introduction (PDF)
Chicago 2017 Process Data (PDF)
Chicago 2017 Create a GBM Model (PDF)
Chicago 2017 Use EnDDaT (PDF)




USGS Workshop Video Training

Workshops led by Wisconsin Sea Grant and the USGS Wisconsin Water Science Center titled Developing Predictive Models for your Beach: Hands-on Training, were recorded and are available below. The full training for building a complete model in Virtual Beach takes 10-12 hours.

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'EnDDaT' Training Videos and Tools

The Environmental Data Discovery and Transformation (EnDDaT) is a service used to access data from multiple sources, compile and process the data, and perform common transformations. This tool was developed by the USGS and has the ability to be directly linked within Virtual Beach. Use these videos and tools to learn how to access, transform, and download historical and real-time Virtual Beach inputs (e.g., rainfall, tributary discharge, waves, and currents.

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Online Data Sources

To develop a VB model, one needs historical data on water quality (i.e., lab results) from two or more beach seasons, together with potentially related environmental conditions, such as stream discharge, antecedent rainfall, wave height, turbidity, waterfowl, etc...  Depending on the beach, many if not all of these data will be available online, for free.



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FAQs

Best Practices for Operating and Maintaining Water-Quality Nowcasts

A list of commonly asked questions and suggestions for variables to use in building a VB model can be found in the document below:
Virtual Beach FAQs.pdf



This project is funded by the Wisconsin Coastal Management Program and the National Oceanic and Atmospheric Administration,
Office of Ocean and Coastal Resource Management under the Coastal Zone Management Act, Grant# NA13NOS4190043.



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