pghydro

pghydro : Drainage network analysis core for PostgreSQL and PostGIS

Overview

Packages

Source

pig build pkg pghydro;		# build rpm/deb

Install

Make sure PGDG and PIGSTY repo available:

pig repo add pgsql -u   # add both repo and update cache

Install this extension with pig:

pig install pghydro;		# install via package name, for the active PG version

pig install pghydro -v 18;   # install for PG 18
pig install pghydro -v 17;   # install for PG 17
pig install pghydro -v 16;   # install for PG 16
pig install pghydro -v 15;   # install for PG 15
pig install pghydro -v 14;   # install for PG 14

Create this extension with:

CREATE EXTENSION pghydro CASCADE; -- requires plpgsql, postgis

Usage

Sources: README, repo, releases

pghydro is the core extension in the PgHydro suite for drainage-network analysis and water-resources decision support on top of PostgreSQL and PostGIS.

Install the PgHydro suite

CREATE EXTENSION postgis;
CREATE EXTENSION postgis_raster;
CREATE EXTENSION pghydro;
CREATE EXTENSION pgh_raster;
CREATE EXTENSION pgh_hgm;
CREATE EXTENSION pgh_consistency;
CREATE EXTENSION pgh_output;

The upstream README presents these companion extensions together:

• pghydro for drainage-network analysis
• pgh_raster for DEM-derived hydrological products
• pgh_hgm for hydrogeomorphological analysis
• pgh_consistency for Pfafstetter consistency checks
• pgh_output for reporting objects

What upstream says it covers

The README describes support for:

• flow-direction correction in river networks
• Otto Pfafstetter basin coding
• upstream and downstream stretch selection
• distance-to-mouth calculations
• upstream area calculations
• river orders and basin levels

Requirements

• PostgreSQL 9.1+
• PostGIS 3.x
• PostGIS Raster

Notes

• The current upstream README status section still says the master branch tracks release 6.6 and the develop branch tracks 6.7-dev.
• The repository also publishes newer tags, but the user-facing README remains centered on the 6.6 installation and tutorial flow.