WATER GLOSSARY OF TERMS
A
acid--a substance that has a pH of less than 7, which is neutral. Specifically, and acid has more free hydrogen ions (H+) than hydroxyl ions (OH-).
acre-foot (acre-ft)--the volume of water required to cover 1 acre of land (43,560 square feet) to a depth of 1 foot. Equal to 325,851 gallons or 1,233 cubic meters.
alkaline--sometimes water or soils contain an amount of alkali (strongly basic) substances sufficient to raise the pH value above 7.0 and be harmful to the growth of crops.
alkalinity--the capacity of water for neutralizing an acid solution.