EXPLAINER: How PAGASA monitors river basins to prepare for floods

<p>As the Southwest Monsoon or Habagat brings heavy rain in many parts of the Philippines, the weather bureau PAGASA's monitoring of the country's river basins becomes even more important.</p><p>According to GMA News Feed, PAGASA hydrologist Jayson Bausa, keeping a close watch on the river basins is crucial because heavy rain, runoff from the ground, and the rising water level in rivers may worsen flooding especially in low-lying areas.</p><p>How does PAGASA monitor the country's river basins and warn the public of impending floods?</p><p>The agency's Flood Forecasting and Warning Section collects data, rainfall observation, rainfall forecast, satellite monitoring, radar, and observed rainfall from rain gauges at the country's river basins.</p><p>A river basin is a vast area of land where rainwater accumulates and flows toward a main river, lake, or other body…