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Tools and services currently in the catalog represent only a fraction of those in use by active WMA projects. The team is working on including more to provide a better view of commonly used tools and services. Let us know about your experience using the catalog!

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Tools

hydroloom

Keywords: hydrofabric; hydrology

Domain: Hydrology

Language: R

Environment: Windows; Linux; MacOS

Description:

The hydroloom package supports both dendritic and non-dendritic networks and implements a variety of high performance graph-theoretic algorithms to support typical hydrographic network operations.

hydroloom operates on hydrographic networks represented as flowline tables with an identifier and downstream identifier, or from-node and to-node pairs, with or without geometry, plus associated catchment polygons. It is not tied to one data model: attribute names from NHDPlus, NHDPlus HR, 3DHP, the NHGF reference hydrofabric, the Geospatial Fabric, or any custom source are mapped to hydroloom’s built-in definitions with the hy class and hydroloom_names() . From such a network it derives hydrosequence, level path, mainstem, stream order, path length, divergence attributes, and drainage-area accumulation, and it indexes points to flowlines.

Citation:

Blodgett, D., 2026, hydroloom: Utilities to Weave Hydrologic Fabrics v1.2: U.S. Geological Survey software release, https://doi.org/10.5066/P16RS3UZ

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