When building earth rock dam, in addition to preventing the dam body from being directly washed away by flood, it is also very critical to prevent water seepage. In particular, Team 2 of Canzi Village also needs to take into account the function of fish farming, which requires higher conditions.
According to Xie Gong's design, the best reverse osmosis layer material they can find at present is red clay. This kind of soil is particularly cohesive and waterproof. It is a material for making pots and pans.
In other villages, red clay is also used to prevent leakage of water cellars.
The origin of the name of Jar Village is that there used to be a small kiln in the village to produce pots and pans. There is still a lot of red clay in the hills in the west