The increased volume of water enables larger areas to be irrigated.增加的水量使更多的土地能得到灌溉。These gates regulate the amount of water flowing into the canal.这些闸门调节流入运河的水量。Allow for some shrinkage in both length and width.长、宽上都预留出一定的缩水量。The dam regulates the flow of water into the river.大坝调节流入河流的水量。