# Model Outputs

<figure><img src="/files/PaVawJedXyedjBIBlRgS" alt="" width="563"><figcaption></figcaption></figure>

IN THIS ARTICLE

Models within each activity record allow estimated environmental benefits to be associated with the digital representation of the on-the-ground work.

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## Model Outputs

To activate a model, you must complete the required input fields, which are determined by the **activity type** associated with the record. For most Adapted CAST models, the only required input is the **extent** in acres. However, we recommend reviewing all available input fields to ensure your estimate is as accurate as possible.

Keep in mind that the **model output view** will vary depending on the activity type linked to the record, as different practices may produce different types of reduction estimates.

### Tour the Models view

{% @arcade/embed flowId="7yYYf7XtebnCnjJoroEa" url="<https://app.arcade.software/share/7yYYf7XtebnCnjJoroEa>" %}

## Models

FieldDoc supports a growing library of model calculators. For detailed information on the supported models, we recommend reading the associated model documentation.

* [Adapted Chesapeake Nutrient and Sediment Load Reduction Model](/resources/models/adapted-chesapeake-nutrient-and-sediment-load-reduction-model.md)
* [In-Stream load reduction estimates](/resources/models/in-stream-load-reduction-estimates.md)
* [Shoreline restoration load reduction estimates](/resources/models/shoreline-restoration-load-reduction-estimates.md)
* [Stormwater performance standard - treatment depths other than 1-inch](/resources/models/stream-restoration-load-reduction-estimates-protocols-1-5.md)
* [Stream restoration load reduction estimates (Protocols 1 -5)](/resources/models/stream-restoration-load-reduction-estimates-protocols-1-5.md)


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