City Interventions

Pu’er Flood Control, Environmental Improvement and Water Reclamation Works Project

Country: China
City: Pu’er

Key Stakeholders and PartnersPu’er Municipal Government; Kreditanstalt für Wiederaufbau (KfW)

Project Preparation Study PeriodJanuary 2012 – June 2012

CDIA SupportUS$ 410,000

Expected Downstream Financing$80 million (KfW Loan)

Infrastructure sectorsFlood/Drainage Management

CDIA priority impact areasClimate Change Mitigation and Adaptation; Environmental Improvement

Pu'er City used natural materials and processes to rehabilitate its Simao River.

Key City Development Issues

Pu’er is situated in the southwest of Yunnan Province with an estimated population of 200,000. The city covers a floodplain of about 45,000 sq km surrounded by hills and mountains where the famous Pu’er tea is grown. Traversing the whole city is the 15 km long Simao River whose function as a natural drainage channel has been significantly affected by increasing urbanization. Large portions of the river have been channelized with water flow impeded by solid waste and aquatic plants and some parts of the riverbanks inhabited by informal settlers thereby exposing the city to the risks of flooding. The city’s drainage system is inadequate with large amount of untreated wastewater directly discharged into Simao River resulting in the deterioration of water quality of the river.

Details of Cooperation

Based on the conceptual design approved by the municipal government, the CDIA prepared a final design for Simao river rehabilitation with the following key recommendations: (i) improvement of water quality through a series of treatment wetlands at the confluences of Simao river tributaries and storm water channels; (ii) provision of river layout that can protect the city from 50-year flood events; (iii) allowing the river water to flow through a combination of free-flowing stream and still water sections; (iv) provision of open main flood channel with vegetation situated alongside riverbanks; and (v) division of project construction into three sections and three contract packages within the entire length of the river.

Expected Development Outcomes

When the project is fully completed, Simao River is expected to achieve the 50-year flood prevention standard while the eight river tributaries will attain a 20-year flood control standard. Ultimately, the project will result in the complete transformation of the Simao River into an attractive ecological landmark, elimination of flood risks, improvement of water quality of the river and enhancement of living conditions of city residents.


Key City informationLand Area: 45,000 sq. km.
Population: 200,000 (2018)
City website: n/a

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