淤灌 Traditional form: 淤灌 Pinyin (reading): yūguàn Definitions: to warp (fertilize land by flooding) Characters: 淤 - mud, sediment; to clog up, to silt up 灌 - to water, to irrigate; to pour; to flood Traditional characters: 淤 - mud, sediment; to clog up, to silt up 灌 - to water, to irrigate; to pour; to flood