Category
HydrologyRelated Terms
7 in category
In Context
Dam operators in Luzon, including at Angat and La Mesa, must balance holding back water for supply against releasing it early enough to avoid a sudden, larger release once a reservoir nears capacity during extreme rainfall.
Related Terms in Hydrology
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Catch Basin
A catch basin is a drainage structure designed to collect surface runoff and channel it away from roads and low-lying areas, reducing localized flooding during heavy rain.
Reservoir
A reservoir is a large artificial or natural body of water used to store water for supply, irrigation, or flood control, requiring careful management during heavy typhoon rainfall.
River Basin
A river basin is the larger geographic area drained by a river and all its tributaries, encompassing multiple watersheds.
River Level
River level specifically refers to the water level of a river, monitored at gauging stations and compared against alert, alarm, and critical thresholds during heavy rainfall.
Streamflow
Streamflow is the volume of water moving through a river or stream channel over time, used alongside water level to assess flood risk and dam release planning.
Water Level
Water level is the height of water in a river, reservoir, or other body, tracked continuously to determine when flood warnings or evacuation orders should be issued.
Watershed
A watershed is the area of land where all rainfall and runoff drain toward a common river, lake, or outlet, the basic unit used to track flood risk from heavy typhoon rainfall.
This definition is part of the azifind.com Typhoon Wiki, informed by PAGASA and the World Bank/GFDRR catastrophe risk data used across our province pages. View all Typhoon Wiki terms →