5,208 articles
Blackwater (waste)
Blackwater is the wastewater from toilets, consisting of feces, urine, toilet paper, and flushing water. It carries most of sewage's nitrogen and pathogens and can be treated to recover biogas and nutrients.
Blaney–Criddle method
The Blaney–Criddle method is a temperature-based empirical formula estimating crop evapotranspiration from mean temperature and day length, developed by H. F. Blaney and W. D. Criddle in 1950.
Blarney Castle
Blarney Castle (Caisleán na Blarnan) is a medieval tower house near Cork, Ireland, built by the MacCarthy lords of Muskerry and home of the Blarney Stone.
Blarney Stone
The Blarney Stone, or Stone of Eloquence, is a limestone block in Blarney Castle near Cork, Ireland, said to grant eloquence to anyone who kisses it.
Blåsjø Reservoir
Blåsjø is a reservoir on the Setesdal plateau in southwestern Norway and, with 7.8 TWh of energy content, Norway's largest hydropower reservoir, formed by linking mountain lakes.
Blast vibration and damage control in tunnelling
Blast vibration and damage control in tunnelling is the practice of limiting ground vibration that cracks nearby structures and blast damage to the tunnel's own rock and support.
Blenheim Palace
Blenheim Palace is a monumental English Baroque country house at Woodstock in Oxfordshire, built between 1705 and 1722 for the 1st Duke of Marlborough, birthplace of Winston Churchill.
Blickling Hall
Blickling Hall is a Grade I listed Jacobean red-brick country house near Aylsham in Norfolk, England, built from about 1619 on the site of Anne Boleyn's birthplace.
Blockhouse
A blockhouse is a small, roofed fortification loopholed for firing in any direction, serving as a defended post for a small garrison; in modern usage it stands above ground.
Blockley Almshouse
Blockley Almshouse was Philadelphia's public institution for the poor in West Philadelphia, combining poor relief, a hospital, and an asylum, and evolving into Philadelphia General Hospital.
Blue Mesa Reservoir
Blue Mesa Reservoir is the largest body of water in Colorado, an impoundment of the Gunnison River near Gunnison created by Blue Mesa Dam in 1966.
Blue Mosque, Istanbul
The Blue Mosque, officially the Sultan Ahmed Mosque (Sultanahmet Camii), is an Ottoman imperial mosque in Istanbul, built for Sultan Ahmed I from 1609 to 1616 and known for its blue İznik tiles and six minarets.
Blue Plains Advanced Wastewater Treatment Plant
The Blue Plains Advanced Wastewater Treatment Plant is a wastewater treatment plant on the Potomac River in Washington, D.C., serving the District and parts of Maryland and Virginia.
Blue Water Bridge
The Blue Water Bridge is a twin-span international bridge over the St. Clair River connecting Port Huron, Michigan, and Point Edward, Ontario, with spans opened in 1938 and 1997.
Board of Engineers Malaysia
The Board of Engineers Malaysia (Malay: Lembaga Jurutera Malaysia) is a statutory agency under the Ministry of Works, established under the Registration of Engineers Act 1967 to register engineers.
Boarding house
A boarding house, also known as a lodging house, is a private house where the proprietor provides meals and lodging for paying guests, common in 19th-century cities.
Boardwalk
A boardwalk is a walkway made of wooden boards, usually built along a beach or shore, ranging from simple paths over sand to commercial promenades like Atlantic City's.
Boat lift
A boat lift raises or lowers a boat between two bodies of water at different levels in a water-filled caisson, replacing flights of locks and conserving water.
Boat lift engineering and operation
A boat lift is a canal structure that carries a boat between water levels in a water-filled caisson, using almost no water and beating locks above 40 meters.
Boaz and Jachin
Boaz and Jachin were the two bronze pillars at the entrance of Solomon's Temple in Jerusalem, named Jachin on the right and Boaz on the left.
Bodiam Castle
Bodiam Castle is a 14th-century moated castle near Robertsbridge in East Sussex, England, built from 1385 by Sir Edward Dallingridge and owned by the National Trust since 1925.
Bogibeel Bridge
The Bogibeel Bridge is a 4.94 km double-deck rail-cum-road bridge across the Brahmaputra River in Assam, India, connecting Dibrugarh and Dhemaji; inaugurated in 2018, it is India's longest rail-cum-road bridge.
Bogotá Water Company
The Bogotá Water Company (Empresa de Acueducto y Alcantarillado de Bogotá, EAAB) is the public utility supplying water and sewerage in Bogotá, Colombia, the largest in the sector.
Boil-water advisory
A boil-water advisory, also called a boil-water order, is a public announcement telling residents to boil tap water before ingesting it, issued when the supply is or may be contaminated.
Boise River Diversion Dam
The Boise River Diversion Dam is an irrigation dam on the Boise River near Boise, Idaho, completed in 1908 to divert water into the New York Canal.
Boiserie
Boiserie is wood paneling applied to interior walls, usually floor to ceiling and enriched by carving, gilding, or painting, defining French interiors of the 17th and 18th centuries, from Parisian town houses to Versailles.
Boleskine House
Boleskine House is a listed manor house on Loch Ness in Scotland, once owned by Aleister Crowley and Jimmy Page and restored after fires in 2015 and 2019.
Bollitree Castle
Bollitree Castle, Weston under Penyard, Herefordshire: an 18th-century folly facade added to a Queen Anne mansion on the Roman Ariconium site; Grade I listed farm buildings, Merrick and Palmer owners, cider fame.
Bollman truss
Patented in 1852 by Wendel Bollman, the Bollman truss was an American bridge system that utilized cast and wrought iron in its rigid and suspension design.
Bolmen Water Tunnel
The Bolmen Water Tunnel (Bolmentunneln) is an 80 km raw-water tunnel in southern Sweden carrying drinking water from Lake Bolmen to northern Skåne, in service since 1987.