pghydro

Overview

Lead row; package also ships pgh_raster, pgh_hgm, pgh_output, pgh_output_en_au, pgh_output_pt_br, and pgh_consistency.

Version

Build

You can build the RPM / DEB packages for pghydro using pig build:

pig build pkg pghydro         # build RPM / DEB packages

Install

You can install pghydro directly. First, make sure the PGDG and PIGSTY repositories are added and enabled:

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

Install the extension using pig or apt/yum/dnf:

• Install
• pig
• dnf
• apt

pig install pghydro;          # Install for current active PG version

pig ext install -y pghydro -v 18  # PG 18
pig ext install -y pghydro -v 17  # PG 17
pig ext install -y pghydro -v 16  # PG 16
pig ext install -y pghydro -v 15  # PG 15
pig ext install -y pghydro -v 14  # PG 14

dnf install -y pghydro_18       # PG 18
dnf install -y pghydro_17       # PG 17
dnf install -y pghydro_16       # PG 16
dnf install -y pghydro_15       # PG 15
dnf install -y pghydro_14       # PG 14

apt install -y postgresql-18-pghydro   # PG 18
apt install -y postgresql-17-pghydro   # PG 17
apt install -y postgresql-16-pghydro   # PG 16
apt install -y postgresql-15-pghydro   # PG 15
apt install -y postgresql-14-pghydro   # PG 14

Create Extension:

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.