page_title: Zoigê Marsh
section_title: History
hierarchical_section_title: Zoigê Marsh / History
caption_attribution_description: 中文: ，天高云阔
context_page_description: The Zoigê Marsh, also known as the Ruoergai Marsh or the Songpan Grasslands, is located in the eastern part of the Tibetan Plateau and forms the largest high-altitude marsh area in the world.
context_section_description: The Long March passed through the Zoigê Marsh in August 1935. The marshes were partially drained for grazing of cattle, sheep, and horses in the 1970s. This involved digging 200 km of ditches to drain 1,400 km² of marshland. The project continued until the 1990s and exacerbated desertification problems. Herders reported that gold miners have also used cloud-seeding cannons to prevent rainfall, which has caused die-offs in vegetation.
  In 1994, a nature preserve was established in the marshes. From 2010, community efforts to replant local grasses have been underway, with light grazing by yak allowed, so that the animals can tread the seeds down and stimulate regrowth.
caption: Yak graze on the Zoigê Grassland.
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