Many farms and ranches use reservoirs, like the one shown here, to collect and store rainwater. Reservoirs ensure there is enough water for crops and animals. Describe the type of soil that would be best for lining a reservoir.
Bentonite clay is a very fine clay soil. It absorbs much more water than other types of clay. Bentonite should be mixed in with coarse material and compacted. Then when water is introduced to the reservoir, the clay swells up and becomes impervious.
