over-irrigation

noun

1. the artificial application of water to land to assist in the production of crops.
2. Medicine/Medical. the flushing or washing out of anything with water or other liquid.
3. the state of being irrigated.

n.“a supplying of water to land,” 1610s, from Latin irrigationem (nominative irrigatio) “a watering,” noun of action from past participle stem of irrigare (see irrigate). Artificial provision of water to sustain growing plants.