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Canal de l'Ourcq
The Canal de l'Ourcq is a 97-kilometer French canal from Mareuil-sur-Ourcq in the Oise to the bassin de la Villette in Paris, built under Napoleon and opened by 1822.
Canal de Montijo
The Canal de Montijo is an irrigation canal in Badajoz province, Extremadura, Spain, carrying water from the Guadiana basin to the Vegas Bajas near Mérida.
Canal de Navarra
Canal de Navarra is an irrigation and drinking-water canal in Navarra, Spain, carrying water from the Itoiz reservoir on the Irati river about 177 km south to Ablitas.
Canal de Urgell
The Canal de Urgell (Canal d'Urgell) is a major irrigation canal in western Catalonia, Spain, drawing from the Segre river and irrigating about 87,000 hectares of the plain of Lleida.
Canal drop structure
A canal drop structure, also called a canal fall, is a hydraulic structure that lowers water abruptly between canal sections while dissipating energy to prevent erosion.
Canal du Midi
The Canal du Midi, or Languedoc Canal, is a 240 km canal in southern France built between 1667 and 1681 under Pierre-Paul Riquet, linking Toulouse to the Mediterranean.
Canal Imperial de Aragón
The Canal Imperial de Aragón is a 110 km Spanish irrigation and water-supply canal on the Ebro, built between 1776 and 1790 under Ramón Pignatelli.
Canal inclined plane
A canal inclined plane is a rail-mounted structure carrying boats between two canal levels on a slope, in a water-filled caisson or on a cradle.
Canal lining
Canal lining adds an impermeable layer to the bed and edges of an irrigation canal to reduce seepage losses, using materials such as concrete, clay, and geomembranes.
Canal navigation restoration technique
Canal navigation restoration returns a derelict canal or river navigation to full use, combining engineering, water supply, heritage conservation, and volunteer labor, pioneered in Britain from the 1950s.
Canal of the Pharaohs
The Canal of the Pharaohs, also known as Necho's Canal, was an ancient canal linking the Nile to the Red Sea, completed by Darius I around 510 BC.
Canal rotation system
A canal rotation system distributes irrigation water in fixed turns, each farmer receiving the entire canal flow for a scheduled period, as in the warabandi system.
Canal Saint-Martin
The Canal Saint-Martin is a 4.5 km canal in Paris connecting the bassin de la Villette to the Seine, opened in 1825 and now a popular promenade.
Canal siphon
A canal siphon, more fully an inverted siphon or sag pipe, is a closed conduit that carries canal water by gravity under roads, railroads, and depressions.
Canal tunnel
A canal tunnel is a tunnel dug to carry a navigable canal through a hill or high ground, often without a towpath, forcing boats through by legging.
Canale Cavour
The Canale Cavour (Cavour Canal) is a major irrigation canal in Piedmont, Italy, drawing water from the Po at Chivasso to feed the rice-growing plains near Vercelli and Novara.
Canals of Amsterdam
The canals of Amsterdam, also called the Amsterdam canals, are a 17th-century ring of waterways around the old town, a UNESCO World Heritage Site since 2010.
Canals of the United Kingdom
The canals of the United Kingdom, also called the canals of Britain, are a roughly 2,000-mile waterway network built from the 1760s, now used for leisure.
Cantilever
A cantilever is a rigid structural element, typically a beam fixed at one end and free at the other, projecting into space, as in balconies and cantilever bridges.
Cantilever bridge
A cantilever bridge is built from cantilevers, structures anchored at only one end, so the deck can be built outward from piers without falsework, giving larger spans than simple beams.
Cantilever method
The cantilever method is an approximate structural analysis method for multi-storey building frames under lateral loads like wind, treating the frame as a vertical cantilever beam.
Capacitive deionization
Capacitive deionization (CDI) is an electrochemical desalination method that removes dissolved salt ions from brackish water by electrosorption into porous carbon electrodes at low voltage.
Cape Town water crisis
The Cape Town water crisis was the 2015–2018 drought and supply emergency in which Cape Town's dams fell toward Day Zero, the planned municipal tap shutoff that never arrived.
Capilano Suspension Bridge
The Capilano Suspension Bridge is a 137-meter pedestrian bridge crossing the Capilano River canyon 70 meters above the water in North Vancouver, British Columbia, first built in 1889.
Carbon filtering
Carbon filtering, or carbon filtration, removes contaminants by adsorption onto activated carbon, a key drinking-water treatment for taste, odor, pesticides, volatile organic compounds, and PFAS.
Cardiff Bay Barrage
The Cardiff Bay Barrage is a 1.1 km barrier across the mouth of Cardiff Bay in south Wales, built from 1994 to 1999 to create a freshwater lake.
Cardiff Corporation Waterworks
Cardiff Corporation Waterworks was the municipal water undertaking of Cardiff, Wales, formed in 1879, which supplied the city with water from impounding reservoirs in the Taff Fawr valley.
Carillion
Carillion plc, a British multinational construction and facilities management company, entered compulsory liquidation in January 2018 with nearly £7 billion in liabilities and about 45,000 employees worldwide.
Carlsbad Desalination Plant
The Claude "Bud" Lewis Carlsbad Desalination Plant is a seawater reverse-osmosis plant in Carlsbad, California, opened in December 2015 as the largest in the United States, producing about 10 percent of San Diego County's water.
Caroline (tunnel boring machine)
Caroline was a 2,050-tonne tunnel boring machine that excavated the 5-mile western section of HS2's Northolt Tunnel in London, launched in 2022 and completed in 2025.