The water is almost wholly taken from the rivers, but underflow is also utilized, especially in San Luis Park.
Most of the streams maintain a good flow of water in the driest seasons, and in case of heavy rains many of them " underflow " the adjacent bottom lands, saturating the permeable substratum of the country with the surplus water, which in time drains out and feeds the subsiding streams. This feature is particularly true of the Saline, Solomon and Smoky Hill rivers.
The underflow is probably much greater than the summer ' About 52 grains per gallon at low water, 404 at high.