Mining Impact on Rivers Flood Risks in Dynamic Channels
Rivers are often subjected to human interventions such as structural confinement and aggregate mining, which significantly alter their natural flow and topography. A recent study conducted on the gravel-bed Bislak River in the Philippines sheds light on how these activities influence river morphology, hydraulics, and flood risks.
Using repeat, system-scale, high-resolution topographic surveys, researchers examined annual morphological changes in the Bislak River. They coupled this data with two-dimensional hydraulic modeling to simulate the impacts on flood risk. The findings highlight a complex interplay between human actions, sediment dynamics, and river hydraulics.
Key Findings
Sediment Dynamics and Topography
Aggregate mining was found to export sediment from the river, lea...