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: GitHub repo, README, releases Lead extension for the PgHydro suite.

PgHydro extends PostGIS and PostgreSQL for drainage network analysis and water-resources decision making. The project covers river network modeling, flow-direction analysis, Otto Pfafstetter basin coding, upstream and downstream stretch selection, distance-to-mouth calculations, upstream area analysis, river orders, and basin levels.

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;

Components

• pghydro is the core drainage-network analysis extension.
• pgh_raster uses hydrological products derived from a digital elevation model.
• pgh_hgm combines pghydro and pgh_raster for hydrogeomorphological analysis.
• pgh_output provides reporting objects.
• pgh_consistency adds Pfafstetter consistency checks.

Requirements

• PostgreSQL 9.1 or newer.
• PostGIS 3.x.
• PostGIS Raster.

Notes

• The README says the master branch tracks the latest minor release, 6.6.
• The CSV lead row is the core pghydro package, but the repository also ships companion extensions in the same release tree.