Aqualf
Midwest Wetland Delineations
About
This app streamlines wetland delineation for environmental professionals in the Midwest. It digitizes the USACE data form, offering offline entry, automated calculations, and intelligent suggestions for soil indicators. Export official PDF reports directly from your device.
What's New in Aqualf
1.0.1
May 25, 2026
What's New in Aqualf 1.0.1 - Plot Duplication - Long-press any sample plot on the project screen to duplicate or delete it. Duplicating copies all vegetation, soil profile, hydrology indicators, and summary data into a new plot. Rename it from the Summary tab and edit whatever differs. Useful for adjacent plots with similar vegetation or soil conditions. - PLSS Bulk Edit - Section, Township, and Range now flows from the project level down to individual plots automatically. Enter it once on the project and all new plots inherit it. The Edit Project screen also includes a new "Apply to All Plots" button to push the value to existing plots in one tap. - New App Icon - Fresh icon for v1.0.1. - Hydric Soil Engine Update - Indicator logic updated to USDA-NRCS Field Indicators of Hydric Soils v9.3 (2026). The A18 (Iron Monosulfides) suggestion trigger has been tightened to more accurately reflect the published field criteria. Other Problematic Hydric Indicator - "Other (Explain in Remarks)" has been added to the Problematic Hydric Soil Indicators checklist, with a reference modal explaining the documentation requirements for unlisted problematic indicators. PDF Fix - Corrected a formatting issue that caused a duplicate "Sampling Point" label to appear in the Hydrology section header on exported PDFs.
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FAQ
What is Aqualf?
Aqualf is a professional field data entry app designed for completing the USACE Midwest Region Wetland Determination Data Form (Version 2.0). It replaces paper forms with a structured digital workflow that operates entirely offline.
Does Aqualf work offline?
Yes, Aqualf is designed to work entirely offline. No account, internet connection, or data transfer is required, ensuring your field data stays on your device.
What kind of calculations does Aqualf perform?
Aqualf performs instant dominance test, prevalence index, and FAC-neutral test results as you enter vegetation data. It also suggests hydric soil indicators based on horizon data.
Can I export my data from Aqualf?
Yes, Aqualf generates an official multi-page PDF that mirrors the USACE Midwest v2.0 form layout. This PDF can be seamlessly shared via AirDrop, Files, email, or any standard iOS share sheet destination.
What is the scope of Aqualf's coverage?
This version of Aqualf covers the USACE Midwest Region only and is available exclusively for iOS devices. It is intended for professional use by qualified wetland scientists.
How frequently is Aqualf updated?
Aqualf was last updated on May 25, 2026, with version 1.0.1. The app is designed to support the latest USDA NRCS Field Indicators of Hydric Soils v9.0 (2024) and USDA NRCS v9.3 (2026) criteria.
Is Aqualf suitable for beginners?
Aqualf is intended for professional use by qualified wetland scientists. While it offers helpful suggestions and warnings, it does not replace professional judgment or constitute a formal wetland delineation.
Does Aqualf have ads?
No, Aqualf does not contain advertisements. The app is free to use and does not include any in-app purchases or ads.