“山湾塘”是水利工程的一种。在四川省的广大丘陵地区中，农田分布往往是一冲一沟的，其上游冲顶或沟顶，常见这种“山湾塘”。一口塘可保当地一冲一沟的农田灌溉和人畜生活用水，也是水产养殖的水源工程之一。这种“山湾塘”始建于何时，名称怎么来的？本人有幸参加了西南地 “Shan Wan Tong” is a kind of water conservancy project. In the vast hilly areas of Sichuan Province, the distribution of farmland is often one-touch and one-ditch, and the upstream is the top of the hill, which is commonly known as the “Shanwan Pond”. A pond can guarantee local irrigation and irrigation of livestock and livestock, and it is also one of the water sources for aquaculture. When was this “Shan Wan Tong” built? How did the name come from? I had the honor to participate in the Southwest