This video explains river flooding, using hydrographs to analyze river discharge over time. Hydrographs show rising limb (water entering river), peak flow (maximum discharge), and receding limb (water exiting). Factors influencing flood likelihood include drainage basin size & shape, slope, rock/soil type, land use, drainage density, precipitation, temperature, and tidal conditions. Larger basins and steeper slopes increase flood risk, while permeable rocks and vegetation reduce it. Urban areas with impermeable surfaces significantly increase flood risk due to rapid runoff. All factors interact, requiring holistic consideration for accurate flood risk assessment.