A landslide dam located in the Huanghe upriver was formed by two landslides, then formed the harrier lake which is core area of national natural protection now.

• 摘要黄河上游某滑坡坝由两岸滑坡物质形成，进而形成了天然堰塞湖，附近区域现己成为国家自然保护区核心区。