Water meadow : A meadow, or piece of low, flat land, capable of being kept in a state of fertility by being overflowed with water from some adjoining river or stream.

Example:


Taxonomy
water-meadow, water-meadows, ridges, derelict, drains, ground, irrigation, carriers, free encyclopedia, catchwork, grass, carrier channel, river valleys, slopes, crest, foreground, channel, water flow.

Defination from the web:
water-meadow. ... The working or floating (irrigation) and maintenance of the water-meadow was done by a highly skilled craftsman called a drowner or waterman, who ...