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  • Mengga River in Yingjiang County, Dehong

    ? Location & Basin

    Mengjia River is one of the four major river systems in Yingjiang County, Dehong Dai and Jingpo Autonomous Prefecture, Yunnan Province.

    • Location: Northwest mountainous region of Yingjiang County; the main river originates from the eastern hills of Sudian Township.

    • Basin Area: The Mengjia River drainage system covers a catchment area of 1,073.43 km².


    ? Hydrological Features

    • River Length & Elevation Drop: Total length of 49.85 km, with an average slope of 43.48‰ and an elevation drop of 1,560 m.

    • Flow Rate: Between 0.80–26.5 m³/s.

    • Hydropower Potential: The river alone has a hydropower potential of 250,600 kW.


    ? Tributaries

    1. Mulong River (木笼河)

      • Originates from Mulong Head Mountain near the border, flows southwest, receiving multiple tributaries.

      • Drains 84.8 km², elevation drop 1,680 m, average slope 80‰.

      • Minimum flow: 1.1 m³/s, hydropower potential: 61,000 kW.

    2. Mengdian River (勐典河)

      • Originates from Furongdi Mountain, Mengnong Township, flows south, passes Mengdianba, then west through Kachang Township.

      • Drains 351.2 km², river length 34.6 km, elevation drop 1,600 m, average slope 46‰.

      • Hydropower potential: 196,000 kW.

    3. Mengnong River (勐弄河)

      • Originates from Saishuipo and Luanmao Mountain tops, flows northwest, joins Mengdian River.

      • Drains 112.0 km², river length 20.6 km, elevation drop 1,040 m.


    ⚡ Water Resource Utilization

    • Hydropower Development:

      • Multiple hydropower stations have been built along the Mengjia River, including Six-level Hydropower Station (operated by Mengjia River Six-Level Hydropower Development Co., Ltd.) and Four-level Hydropower Station.

      • The Four-level Hydropower Station is classified as a Type IV Small(1) Project, a run-of-river scheme designed solely for power generation.

      • Infrastructure includes diversion dams, water tunnels, pressure shafts, pipelines, surface power plants, and step-up substations.


    Mengjia River is not only a vital water resource for Yingjiang County but also a key hydropower development zone supporting regional energy needs. Its tributaries, steep gradients, and ample flow make it ideal for small-to-medium scale hydropower projects.

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