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Created to automate the climatological analysis workflows USACE Regulatory Project Managers are required to perform to comply with long-standing agency guidance.

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Antecedent Precipitation Tool (APT)

Where can I get it?

Follow the instructions on the LATEST RELEASE PAGE

What is it?

An automation tool that evaluates three climatological parameters to assist in the making and documenting of various determinations required by policy for the execution of USACE's Regulatory Program.

Here is a video outlining the functionality of the APT version 1.0. Note that version 2.0 is slightly different.

Watch the video

Scale

The tool can perform its analyses at a single point or at various watersheds scales to evaluate the impact of antecedent precipitation on local hydrologic conditions.

Usage

Rapidly, accurately, and effortlessly determine whether any of the following problematic circumstances exist for a given Latitude, Longitude, and Date:

  • Dry Season
  • Drought Conditions
  • Lower than normal antecedent precipitation
  • Greater than normal antecedent precipitation
  • Automatically document the basis of these decisions for the administrative record.

Utility

  • Site Visit: Determine whether you should use the problematic circumstances portion of the delineation manual and regional supplement
  • Data Sheet Review: Determine whether the applicant or their agent should have used the problematic circumstances portion of the delineation manual and regional supplement
  • Satellite / Aerial Imagery Interpretation: Determine whether the seasonality, drought conditions, and antecedent precipitation are appropriate for a given image to be used for:
    • Hydrology Indicators: Saturation on aerial imagery, Inundation on aerial imagery
    • Connectivity: Continuous saturation or inundation visible between potential WotUS
    • Apparent differences in vegetation:
      • Reduced vigor of upland crops in suspected depressions or swales
      • Greener vegetation in suspected depressions or swales compared to dry/yellow surrounding vegetation
      • Location and extent of any other wetland signatures (e.g. vernal pool stratified vegetation rings)

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Created to automate the climatological analysis workflows USACE Regulatory Project Managers are required to perform to comply with long-standing agency guidance.

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