Taehwagang River

Character

Taehwagang runs 47.54 kilometres from the Baegunsan headwaters through central Ulsan to Ulsan Bay. The continuous river system links mountain water, dense city, industrial landscape and estuary

In 1996, the river’s BOD reached 11.3 mg/L, a level Ulsan describes as unsuitable even for industrial use. By the late 2000s, sewage treatment, river management and civic participation had pushed water quality into the top national grades, while salmon, otters and migratory birds returned

Riverside paths, bridges, reed beds, bird habitat and open water continue through multiple districts, making the river a daily piece of Ulsan rather than a single enclosed destination

The experience

The river is too long for one complete visitor route. The central stretch around Taehwagang National Garden offers the densest public access, while upstream sections become narrower and more natural and the lower river broadens toward the industrial estuary

Walking and cycling paths repeatedly cross between open riverbank, bridges and park sections. In the central city, the water is framed by apartments, roads and civic landscape; farther along, reed margins and bird habitat become more prominent

Wildlife is seasonal. Herons gather in summer, winter brings large crow roosts and other migratory birds, and otters have been recorded even in the upper river. Salmon remain the most famous recovery symbol, although their return has become less reliable as coastal and river temperatures rise

History

Ulsan’s industrial transformation after the 1962 special industrial-zone designation pushed population and factory growth rapidly upward. Wastewater and sewage entered the Taehwagang, and by the 1990s fish kills and severe pollution had made the river a national symbol of the environmental cost of industrialization

The city’s recovery program intensified in the 2000s. Ulsan declared an Ecopolis strategy in 2004, adopted a Taehwagang master plan in 2005 and expanded sewage treatment, river maintenance, ecological space and public waterfront projects. Companies, environmental groups and residents joined cleanup and monitoring programs

From 2007 onward, the river maintained top-grade water-quality levels. Salmon released as juveniles began returning in the early 2000s, and the river’s restored habitats later supported otters, swans and major migratory-bird concentrations

Returns peaked above 1,800 fish in the mid-2010s but later fell sharply; warmer coastal and river water is considered one of the main pressures on this cold-water species. Taehwagang’s ecological recovery therefore continues under conditions different from those that shaped the original cleanup

Before you go

Taehwagang is a linear city landscape with many legitimate entry points. The central National Garden stretch is the most straightforward general anchor, while birdwatching, upper-river ecology and estuary views belong to different sections and seasons