2,617 articles
Great Man-Made River
The Great Man-Made River, or Great Man-Made River Project, is a Libyan network of pipelines carrying fossil groundwater from Saharan aquifers to northern coastal cities and farmland.
Great Mississippi Flood of 1927
The Great Mississippi Flood of 1927 was the most destructive flood in United States history, inundating about 27,000 square miles and leaving over 700,000 homeless.
Great Seto Bridge
The Great Seto Bridge (瀬戸大橋, Seto Ōhashi) is a 13.1 km series of six double-deck bridges carrying road and rail across the Seto Inland Sea between Honshu and Shikoku in Japan.
Great Stink
The Great Stink was the 1858 episode when hot weather made sewage smells from the Thames unbearable in London, prompting Parliament to fund a new sewer system.
Green infrastructure (stormwater)
Green infrastructure for stormwater management uses plant and soil systems, permeable surfaces, and landscaping to store, infiltrate, or evapotranspirate stormwater, reducing flows to sewer systems and surface waters.
Green roof
A green roof, also known as a living roof or eco-roof, is a building roof covered with vegetation planted in engineered growing medium over waterproofing, drainage, and root-barrier layers.
Greenwich foot tunnel
The Greenwich foot tunnel, also known as Greenwich tunnel, is a pedestrian tunnel under the River Thames linking Greenwich with Millwall, opened in 1902 and free to use.
Greywater
Greywater is household wastewater that excludes toilet discharge, typically from baths, showers, and washing machines. It makes up 50–80% of household wastewater and is often recycled for irrigation.
Gripper TBM
A gripper TBM is an open hard-rock tunnel boring machine that advances by bracing gripper pads against the tunnel walls, so the rock carries its thrust.
Groma
The groma was an ancient surveying instrument used above all by Roman land surveyors to set out straight lines and right angles for farmland, towns, roads, and military camps.
Ground motion prediction equation
A ground motion prediction equation, also called a ground motion model or attenuation relationship, is an empirical equation predicting ground shaking from earthquake magnitude and distance.
Ground–structure interaction in tunnelling
Ground–structure interaction in tunnelling is the study of how tunnelling-induced ground movements affect adjacent buildings, bridges, and existing tunnels, and how structure stiffness modifies those movements.
Grout
Grout, also called tile grout, is a fluid, typically cementitious construction material poured into joints, cavities, or porous ground to fill space, bond elements, or block water.
Grout curtain
A grout curtain is a thin zone in a dam's foundation into which grout is injected through lines of boreholes to reduce seepage and uplift pressure.
Groyne
A groyne, called a groin in American usage, is a low structure of stone or timber built perpendicular to the shore to trap sand and reduce beach erosion.
Guangji Bridge (广济桥) (Chaozhou)
Guangji Bridge, also known as Xiangzi Bridge, is a historic bridge across the Han River at Chaozhou, Guangdong, begun in 1171, known for its movable pontoon of 18 boats.
Guaranteed maximum price
A guaranteed maximum price (GMP) is a construction contract where the owner pays actual costs plus a fee, capped at a ceiling, with overruns borne by the contractor.
Guddu Barrage
Guddu Barrage is a barrage on the Indus River in northern Sindh, Pakistan, commissioned in 1962 to provide controlled irrigation water to upper Sindh and adjacent Balochistan.
Guo Shoujing
Guo Shoujing (1231–1316) was a Yuan-dynasty engineer and astronomer from Xingtai, Hebei, whose 82 km Tonghui Canal, completed in 1293, brought grain barges into Beijing.
Gurgānj Dam
The Gurgānj Dam was a medieval wooden dam on the Amu Darya below Gurgānj, today's Konye-Urgench in Turkmenistan, built for irrigation and destroyed by the Mongols in 1221.
Guri Dam
The Guri Dam, officially the Simón Bolívar hydroelectric plant, is a dam on Venezuela's Caroní River with about 10,000 MW capacity, built between 1963 and 1986.
Gusset plate
A gusset plate is a steel plate that joins two or more structural members at a joint through bolts, rivets, or welds, as in truss bridges and braced buildings.
Gust loading factor
The gust loading factor is a wind engineering multiplier that converts mean wind force into an equivalent static design load, introduced by Alan G. Davenport in 1967.
Guthrie rolling bridge
The Guthrie rolling bridge, also known as a thrust bridge, is a retractable bridge patented by British engineer Charles T. Guthrie around 1869 for Victorian fortifications.
Gwangan Bridge
Gwangan Bridge (광안대교), also called Gwangandaegyo and nicknamed the Diamond Bridge, is a 7.42 km two-story bridge in Busan, South Korea, opened in 2003 and curving past Gwangalli Beach.
Gwembe Tonga resettlement
The Gwembe Tonga resettlement was the forced relocation of roughly 57,000 Gwembe Tonga people in 1958 to make way for the Kariba Dam on the Zambezi River.
Gyeongseong urban improvement project
The Gyeongseong urban improvement project (경성시구개수사업) was a road and street reorganization program the Japanese colonial Government-General launched in Seoul in 1912, reshaping the central grid over 25 years.
Ha'penny Bridge
The Ha'penny Bridge, officially the Liffey Bridge (Droichead na Life), is a cast-iron pedestrian footbridge over the River Liffey in Dublin, opened in 1816 as Ireland's first iron bridge.
Haarlemmermeer Polder
The Haarlemmermeer Polder (Haarlemmermeerpolder) is an 18,000-hectare reclaimed lake bed between Amsterdam, Haarlem, and Leiden, drained by three steam pumping stations between 1849 and 1852 and now occupied by farms and Schiphol Airport.
Haditha Dam (سد حديثة)
Haditha Dam (سد حديثة), also called the Qadisiyah Dam, is an earthfill dam and 660 MW hydroelectric plant on the Euphrates River in western Iraq, completed in the late 1980s.