Due to no direct irrigation cost in Self-flowingirrigation Zone along Yellow River, the efficiency of water use is also lowest.
沿黄自流灌区由于没有直接灌溉成本，其用水效率也是最低的。
2
Farm irrigation from these free-flowing bodies is the biggest single human use of freshwater.
自由流通水体的农场灌溉是人们最大的淡水单一使用。
3
7after six years of drought, measuring sticks are useless at the Ziglab Dam in Jordan, built to catch water flowing west into the Jordan River for irrigation.