Make sure excess water can drain. Endorheic drainage basins are inland basins that do not drain to an ocean. The siphon tube connects to the drain. The narrowed canal makes it harder for water to drain from the ear. It was a device widely used for raising water to irrigate fields and drain mines. In order to drain the water, pumps were delivered. This allows the fluid to drain off. Acid mine wastewater can drain into groundwater, causing significant contamination. Arteries and veins above and below the diaphragm supply and drain blood. Hydrocephalus treatment is surgical, creating a way for the excess fluid to drain away. Freezing or overheating will rapidly drain cores. These extracellular fluids then drain into blood vessels, causing a rehydrating effect. They prescribed diuretics in an attempt to drain the fluid from the ear. These ultimately drain into the internal iliac veins. Electric charge flows through a semiconducting channel between "source" and "drain" terminals.