hydrology

باللغة العربية: عِلْم المِيَاهِيَّات

1. The science of the properties, distribution, and effects of water on a planet's surface, in the soil and underlying rocks, and in the atmosphere. (uncountable)
2. The properties, distribution, and flows of water in a specific locale; the hydrological characteristics of a particular place or region. (uncountable)

الجمع hydrologies