The geography of Italy includes the description of all the physical geographical elements of Italy. Italy, whose territory largely coincides with the homonymous geographical region, is located in southern Europe and comprises the long, boot-shaped Italian Peninsula crossed by the Apennines, the southern side of Alps, the large plain of the Po Valley and some islands including Sicily and Sardinia. Italy is part of the Northern Hemisphere. Two of the Pelagie Islands are located on the African continent.
Sardinia is the second-largest island in the Mediterranean Sea, after Sicily, and one of the twenty regions of Italy. It is located west of the Italian Peninsula, north of Tunisia and 16.45 km south of the French island of Corsica.
The nuraghe, or nurhag, is the main type of ancient megalithic edifice found in Sardinia, Italy, developed during the Nuragic Age between 1900 and 730 BC. Today it has come to be the symbol of Sardinia and its distinctive culture known as the Nuragic civilization. More than 7,000 nuraghes have been found, though archeologists believe that originally there were more than 10,000.
Lake Nasser is a vast reservoir in southern Egypt and northern Sudan. It was created by the construction of the Aswan High Dam and is one of the largest man-made lakes in the world. Before its creation, the project faced opposition from Sudan as it would encroach on land in the northern part of the country, where many Nubian people lived who would have to be resettled. In the end Sudan's land near the area of Lake Nasser was mostly flooded by the lake. The lake has become an important economic resource in Egypt, improving agriculture and touting robust fishing and tourism industries.
Hydroelectricity, or hydroelectric power, is electricity generated from hydropower. Hydropower supplies 14% of the world's electricity, almost 4,210 TWh in 2023, which is more than all other renewable sources combined and also more than nuclear power. Hydropower can provide large amounts of low-carbon electricity on demand, making it a key element for creating secure and clean electricity supply systems. A hydroelectric power station that has a dam and reservoir is a flexible source, since the amount of electricity produced can be increased or decreased in seconds or minutes in response to varying electricity demand. Once a hydroelectric complex is constructed, it produces no direct waste, and almost always emits considerably less greenhouse gas than fossil fuel-powered energy plants. However, when constructed in lowland rainforest areas, where part of the forest is inundated, substantial amounts of greenhouse gases may be emitted.
The Sardinian pika is an extinct species of lagomorph that was endemic to the islands of Sardinia, Corsica and neighbouring Mediterranean islands until its extinction likely in Roman times. It was the last surviving member of Prolagus, a genus of lagomorph once widespread throughout Europe during the Miocene and Pliocene epochs, whose closest living relatives are pikas of the genus Ochotona.
A spillway is a structure used to provide the controlled release of water downstream from a dam or levee, typically into the riverbed of the dammed river itself. In the United Kingdom, they may be known as overflow channels. Spillways ensure that water does not damage parts of the structure not designed to convey water.
The province of Sassari is a province in the autonomous island region of Sardinia, Italy. Its capital is the city of Sassari. As of 2017, the province had a population of 493,357 inhabitants.
The San Luis Reservoir is an artificial lake on San Luis Creek in the eastern slopes of the Diablo Range of Merced County, California, approximately 12 mi (19 km) west of Los Banos on State Route 152, which crosses Pacheco Pass and runs along its north shore. It is the fifth largest reservoir in California. The reservoir stores water taken from the San Joaquin-Sacramento River Delta. Water is pumped uphill into the reservoir from the O'Neill Forebay which is fed by the California Aqueduct and is released back into the forebay to continue downstream along the aqueduct as needed for farm irrigation and other uses. Depending on water levels, the reservoir is approximately nine miles (14 km) long from north to south at its longest point, and five miles (8 km) wide. At the eastern end of the reservoir is the San Luis Dam, the fourth largest embankment dam in the United States, which allows for a total capacity of 2,041,000 acre-feet (2,518,000 dam3). Pacheco State Park lies along its western shores.
Orroli, meaning "downy oak" is, a comune (municipality) in the Province of South Sardinia in the Italian region of Sardinia, located about 67.4 kilometres (41.9 mi) north of Cagliari. As of 31 December 2010, it had a population of 2,430 and an area of 75.6 square kilometres (29.2 sq mi). Orroli territory hosts one of the most important nuraghi of Sardinia called Nuraghe Arrubiu, the only intact example of a five-tower nuraghe, one of the dam in the Flumendosa river and the dam of the Mulargia, which gave name to the artificial lake. Within the village there are many hostels and bed and breakfasts organized around old lifestyles and ancient traditions.
Campidano is a plain located in South-Western Sardinia (Italy), covering approximately 100 kilometres between Cagliari and Oristano.
Dam removal is the process of demolishing a dam, returning water flow to the river. Arguments for dam removal consider whether their negative effects outweigh their benefits. The benefits of dams include hydropower production, flood control, irrigation, and navigation. Negative effects of dams include environmental degradation, such as reduced primary productivity, loss of biodiversity, and declines in native species; some negative effects worsen as dams age, like structural weakness, reduced safety, sediment accumulation, and high maintenance expense. The rate of dam removals in the United States has increased over time, in part driven by dam age. As of 1996, 5,000 large dams around the world were more than 50 years old. In 2020, 85% percent of dams in the United States are more than 50 years old. In the United States roughly 900 dams were removed between 1990 and 2015, and by 2015, the rate was 50 to 60 per year. France and Canada have also completed significant removal projects. Japan's first removal, of the Arase Dam on the Kuma River, began in 2012 and was completed in 2017. A number of major dam removal projects have been motivated by environmental goals, particularly restoration of river habitat, native fish, and unique geomorphological features. For example, fish restoration motivated the Elwha Ecosystem Restoration and the dam removal on the river Allier, while recovery of both native fish and of travertine deposition motivated the restoration of Fossil Creek.
Anderson Lake, also known as Anderson Reservoir, is an artificial lake in Morgan Hill, located in southern Santa Clara County, California. The reservoir is formed by the damming of Coyote Creek just below its confluence with Las Animas Creek. A 4,275-acre (1,730 ha) county park surrounds the reservoir and provides limited fishing, picnicking, and hiking activities. Although swimming is prohibited, boating, water-skiing, and jet-skiing are permitted in the reservoir.
Lake Peruća or Peruča is the second largest artificial lake in Croatia, after Lake Dubrava. It is located in the Split-Dalmatia County.
Lake Coghinas is an artificial lake, in northern Sardinia, Italy, located in the province of Sassari. With a surface of 17.8 km2 and a capacity of 254 million cubic metres of water, it is the second largest lake in the region and one of the major reservoirs in Italy.
The blueback herring, blueback shad, or summer shad is an anadromous species of herring from the east coast of North America, with a range from Nova Scotia to Florida. Blueback herring form schools and are believed to migrate offshore to overwinter near the bottom.
The Sardinians, or Sards, are a Romance language-speaking ethnic group indigenous to Sardinia, from which the western Mediterranean island and autonomous region of Italy derives its name.
Codole Reservoir is a reservoir in the Haute-Corse department of France, on the island of Corsica. It supplies water for drinking and irrigation. The reservoir and its immediate surroundings are important as a biotope that offers habitat for many species of birds, reptiles and amphibians
The genetic history of Sardinia consists of the study of the gene pool of the Sardinian people with two main objectives. The first is purely cultural and is to reconstruct the natural history of the population. The other instead has the aim of understanding the genetic causes of high life expectancy and of some pathologies by exploiting some peculiarities of the Sardinian population.
