Using bentonite as the impervious layer to pave the river can lead the limited water to the distance. Bentonite waterproof layer can be directly paved with natural sodium bentonite powder, mixed and compacted with bentonite and local soil, or sandwiched between two layers of fabric to form a waterproof blanket to quickly build water storage tanks, water storage kilns, and water conveyance channels.

   Bentonite can be used as waterproof materials, such as the waterproof board of corrugated cardboard containing bentonite, the waterproof felt of two layers of non-woven fabric with bentonite in the center, and the double waterproof board of one layer of non-woven fabric and one layer of plastic sheet with bentonite in the center. The materials have been widely used in public projects such as subways, dam bottoms, and residual landfills. Bentonite has a high degree of water tightness and the function of self repair and rehabilitation. Its waterproof has compactness, good water retention function and eternal waterproof function.

   Bentonite is harmless to human body and has outstanding environmental protection function. It does not need heating and posting, and is not affected by temperature. The construction period is short. Compared with other waterproof materials, the construction is relatively soft and simple. Use only nails and washers. No special inspection is required after construction, and it is easy to repair if waterproof defects are found.