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Recorded Webinars

Do you want to create a plan for reducing nitrogen, phosphorus and sediment? These webinars are for you! Learn how to create a scenario and analyze the results.

CAST 101: Introduction to CAST and the data available

This webinar reviews the basics of modeling a scenario in CAST and analyzing results to develop an implementation plan. It shows the overall functions including viewing scenarios, loads, and acres in maps, graphs, and tabular formats. It shows how to add and edit BMPs and create loads and BMP summary reports to compare treatment in two scenarios.

Cost Data in CAST

This webinar reviews where CAST cost data comes from, how to use it, how to input your own cost data into CAST, and how to create reports with the data. It also shows how to use CAST to determine the most cost effective BMPs for your implementation plan.

Scenario Loads - Edge of Stream and Edge of Tide

This webinar describes the differences in edge of stream (EOS) and edge of tide (EOT) loads, when to use each scale, and why sometimes EOT loads are higher than EOS loads in your scenario results. It also discusses delivery factors and how they work behind the scenes in CAST to model your scenario loads.

Adding BMPs to CAST Scenarios

This webinar discusses each of the three ways to add BMPs to your CAST scenario: 1) Copy from an existing scenario; 2) Upload BMP text files; and, 3) Add BMPs within Edit Scenario. There are examples of each option with helpful tips on how to review your data and avoid validation errors.

Targeting reductions by location, load source and most effective, least expensive BMP

Targeting by location, load source and BMP. 1 hour, 15 min.

Using CAST to Develop an Environmental Control Plan for Nitrogen, Phosphorus, and Sediment

APA Virginia Chapter

This webinar demonstrates how to develop a nitrogen, phosphorus and sediment reduction plan using CAST. Plans are applicable to development of any water quality improvement plans including the Phase 3 Watershed Implementation Plan (WIP) for the Bay TMDL, local TMDLs, or MS4 permit action plans. The primary audience is local government planners who will use CAST to estimate the nitrogen, phosphorus and sediment loads resulting from selecting one or more BMPs to achieve their goals

View Webinar

CAST for Local Government Planners

This webinar provides an overview of how CAST can be used to answer some basic scoping questions, like how many BMPs in your community have been reported as implemented to the Bay Program, or what the land uses are. We then walk through how you can use CAST to develop a pollutant reduction plan (or similar implementation plan). A How-To Guide walks through the methods for answering several questions that were presented in the webinar. An example spreadsheet demonstrates how to apply CAST results to a geography that is not in CAST, like a township. The webinar was hosted by the Chesapeake Stormwater Network (CSN) as part of their webcast series.


Using CAST to Develop Implementation Plans that Meet Loading Targets in the Chesapeake Bay Watershed - sponsored by EPA's Watershed Academy

EPA’s Watershed Academy sponsored the 94th free Webcast Seminar on November 9, 2017, “Using CAST to Develop Implementation Plans that Meet Loading Targets in the Chesapeake Bay Watershed”. View the recorded webinar online.


Identify Cost-Effective BMPs for Improving Water Quality and Maximizing Co-Benefits

This presentation discusses an approach to help you identify some of the most cost-effective practices for meeting permit requirements and TMDL reductions. Learn which BMPs are least expensive and provide high nutrient reductions, while addressing co-benefits like bacteria reduction. Download the presentation slides here.