Final answer:
The three main outputs of a drainage basin are evaporation/sublimation, subsurface water flow, and river discharge, which includes surface runoff and outflows into larger water bodies.
Step-by-step explanation:
The three main outputs of a drainage basin are evaporation/sublimation, subsurface water flow, and river discharge which includes surface runoff and outflows into oceans or other water bodies. Evaporation and sublimation account for the loss of water as it changes state from liquid or solid directly to gas, exited from the drainage basin's system.
Subsurface water flow, also known as groundwater seepage, contributes to rivers and streams beneath the surface, emanating from aquifers and soil moisture. Lastly, the river discharge is the cumulative flow of water, including melted snow and rain, moving through a river channel over time, reaching larger bodies of water such as lakes, seas, or oceans. This discharge is a critical component of the hydrological cycle, influencing water residence times and ecosystem health.