Miner's inch
（重定向自Miners inch）
The miner's inch is a unit of flow in terms of volume per unit time, usually in relation to flow of water. The definition of a miner's inch varies by location.
In hydraulic mining and some forms of placer mining, as well as ore dressing, a large and regular supply of water is needed. The miner's inch is a method of measuring the amount of flow a particular water supply system (such as a flume or sluice) is capable of supplying.