Monthly Archives: April 2019

Super Sizing Wetlands in CHINA: Lake Fringe Wetland Restoration Along Lake Dianchi, Kunming

The Three Peninsula Wetland project – a 240 ha (2.4 km2) lake fringe wetland restoration will have significant ecological functional lift on a landscape level and help bring a lake viewed as a national treasure back to health. These fringe wetlands frame Dianchi Lake in Kunming, China’s 4th largest freshwater lake. This is one of China’s largest wetland restoration projects with a construction budget exceeding $100 million dollars. Dianchi Lake, a once healthy lake system the 1950s that supported Kunming’s population with an abundance of freshwater mollusks and fish is now a eutrophic system due to uncontrolled release of untreated sewage and agricultural runoff over the last 7 decades. Wetland plant diversity has plummeted from over 100 aquatic and emergent plant species to less than 20. Mark Merkelbach is leading China-based engineering and landscape design teams in treating 10 streams that enter the lake through the project site and restoring critical wetland and riparian habitats. Stream water treatment involves a multi-step process of pre-settling, vertical flow-through wetlands, aeration, and horizontal flow wetlands. These systems comprise of almost half of the project area fully integrated into the site’s new natural landscape. The government has set an aggressive construction schedule with ground breaking to begin in the fall of 2019 and activities completed within 2 years.