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Noun
1. flow rate (esp. water or electricity); quantity of flow; capacity (of output or throughput per unit time)
Wikipedia definition
2. Discharge (hydrology)In hydrology, discharge is the volume rate of water flow, including any suspended solids (i.e. sediment), dissolved chemical species (i.e. CaCO3) and/or biologic material (i.e. diatoms), which is transported through a given cross-sectional area. Frequently, other terms synonymous with discharge are used to describe the volumetric flow rate of water and are typically discipline dependent.
Read “Discharge (hydrology)” on English Wikipedia
Read “流量” on Japanese Wikipedia
Read “Discharge (hydrology)” on DBpedia

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