flooding irrigation
1.Levee: An embankment for preventing flooding; a continuous dike or ridge (as of earth) for confining the irrigation areas of land to be flooded.
2.The experiment with different irrigation and green manure application was carried out in 1995. The Eh value was raised from - 206 mV to +38 mV by means of water control in the rice field. That resulted in decrease of the soluble methane content in soil water from 5. 54 to 0. 25 μg/mL. After flooding methane content increased very slowly.
