# August.XX COMET-Planner & National water quality model ## **New national models added to FieldDoc** ### **COMET-Planner** Estimate carbon sequestration benefits for agricultural practices. This county-based model covers the contiguous U.S. and is now integrated with in-line documentation and linked help resources. We’ve confirmed proper use with the COMET team, so FieldDoc users can confidently use COMET-Planner within their project workflows. ### **National Model (PLET-based)** Built using efficiencies from EPA’s Pollutant Load Estimator Tool (PLET) and loading rates from the Stroud Water Research Center’s Model My Watershed API. This model: * Delineates upstream subwatersheds based on a user-dropped point. * Retrieves specific nitrogen (TN), phosphorus (TP), and sediment (TSS) loading rates using 30m elevation data. * Calculates reductions based on user-entered acreage and BMP type. * Allows for custom efficiency values for advanced users. * Available for use across all of the United States. ## **New user access points and workflow enhancements for models.** ### **Models Accessible at the Top Level** Models can now be accessed directly from the top-level sidebar—no need to create an activity first or use the model sandbox in isolation. This means faster, more flexible access to modeling tools, whether you’re planning, analyzing, or reporting. ## **Modeling access and framework** We’re excited to announce a major overhaul to how models are accessed and used within FieldDoc. These updates streamline user workflows, improve model transparency, and expand support for restoration and conservation planning nationwide. **Model Flexibility & Transparency** * Users can now provide **custom baseline efficiencies**, removing prior limitations and offering flexibility for technical service providers. * We’re considering support for **custom or “de-facto” BMPs** for edge cases where national models don’t provide full coverage. **Upcoming: Stream Restoration & CAST Integration** The same updated modeling interface will soon support the **CAST** and **Stream Restoration** tools—providing a unified experience across all modeling tools in FieldDoc. **📚 Documentation** All models are being documented with: * Embedded inline guidance * Links to source data and external help resources * Clear workflow explanations to support decision-making *** These updates are a foundational step in making FieldDoc a more powerful, flexible tool for modeling and tracking conservation impacts. Stay tuned—more modeling capabilities and improvements are coming soon! --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.fielddoc.org/changelog/august-2025/august.xx-comet-planner-and-national-water-quality-model.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.