River engineering

River engineering is the design and modification of rivers and related infrastructure to manage water, reduce hazards, support navigation, and serve other human purposes.

Levee: An embankment built beside a watercourse to contain high water. Levees keep floods within a designed corridor, but can shift risk downstream.
Inland navigation: The movement of vessels along rivers, canals, and other inland waterways. Locks, dredging, and channel works maintain navigable depths and passages.
River fragmentation: The interruption of a river’s continuity by dams, barriers, or other obstacles. Dams and control structures can block fish movement and break connected habitats.
Ancient Egyptian irrigation: Systems that used Nile floods and canals to water fields in ancient Egypt. Early irrigation works show how river management supported settled agriculture.
Nature-based solutions: Actions that protect, manage, or restore ecosystems to address societal challenges. These approaches use wetlands and floodplains to complement or replace some engineered defenses.
Dam: A barrier built across a watercourse to impound, divert, or regulate water. Dams alter river flow and sediment transport while providing storage or hydropower.
Hydropower: Electricity generated by capturing energy from moving or falling water. Dams and diversion works make river flow available for power generation.
Flood risk: The likelihood and potential harm of flooding to people, property, and infrastructure. Protection works can reduce local exposure while transferring or concentrating risk elsewhere.
Roman aqueduct: A Roman-built structure or channel that carried water over distance, often by gravity. Roman water infrastructure illustrates the engineering of reliable flows for cities.
Room for the River: A Dutch flood-management program that lowers flood levels by giving rivers more space. It contrasts raising barriers with relocating defenses and widening floodplains.

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