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Wadi Derna
The Wadi Derna is a river valley in Libya which leads down from the Jebel Akhdar mountains to the port city of Derna. Like many other wadis in North Africa, it is an intermittent riverbed that for much of its length contains water only when heavy rain occurs. It is long and drains a drainage basin of 575 km. Derna waterfalls The Derna waterfalls are located in Wadi Derna about 7 km (4.3 mi) to the south of Derna. 2023 Derna catastrophe In September 2023, against the backdrop of the civil war, torrential rainfall from Storm Daniel led to the collapse of two dams—the Derna dam and the downstream Abu Mansour dam—along the river, causing catastrophic flooding in the city of Derna and killing least 5,923 people. It was one of the deadliest dam failure A dam failure or dam burst is a catastrophic type of structural failure characterized by the sudden, rapid, and uncontrolled release of impounded water or the likelihood of such an uncontrolled release. Between the year ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mediterranean Sea
The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern Europe, on the south by North Africa, and on the west almost by the Morocco–Spain border. The Mediterranean Sea covers an area of about , representing 0.7% of the global ocean surface, but its connection to the Atlantic via the Strait of Gibraltar—the narrow strait that connects the Atlantic Ocean to the Mediterranean Sea and separates the Iberian Peninsula in Europe from Morocco in Africa—is only wide. Geological evidence indicates that around 5.9 million years ago, the Mediterranean was cut off from the Atlantic and was partly or completely desiccation, desiccated over a period of some 600,000 years during the Messinian salinity crisis before being refilled by the Zanclean flood about 5.3 million years ago. The sea was an important ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Derna Waterfalls
Derna waterfalls () is a fresh-water waterfall in the Jebel Akhdar Mountains, south of the city of Derna, in the northern Cyrenaica region of eastern Libya. The falls have a drop of about 20 metres (70 feet). They are located approximately from central Derna, in the Derna District. They are located on a right bank seasonal tributary at its confluence with the Wadi Derna. See also * List of waterfalls This list of notable waterfalls of the world is sorted by continent, then country, then province, state or territory. A waterfall is included if it is at least tall and has an existing Wikipedia article, or it is considered historically sig ... References Waterfalls of Libya Jebel Akhdar (Libya) Derna District Cyrenaica {{Libya-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Derna, Libya
Derna (; ') is a port city in eastern Libya. With a population of around 90,000, Derna was once the seat of one of the wealthiest provinces among the Barbary States. The city is now the administrative capital of Derna District, which covers a much smaller area than the old province. Among Libyan cities, Derna has a unique location and physical environment, as it lies between the Jebel Akhdar (also known as Green Mountain), the Mediterranean Sea, and the desert and is the fourth most important port in Cyrenaica's northern coast after Benghazi, Bayda and Tobruk. The city is also home to people of many different backgrounds. The city was the location of the famous Battle of Derna (1805), the first victory achieved by the United States Military on foreign soil. Occurring during the First Barbary War, the battle was fought between a force of roughly 500 US Marines and Mediterranean mercenaries and 4,000 or 5,000 Barbary troops. Parts of the city were taken over by Islamic Sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Libya
Libya, officially the State of Libya, is a country in the Maghreb region of North Africa. It borders the Mediterranean Sea to the north, Egypt to Egypt–Libya border, the east, Sudan to Libya–Sudan border, the southeast, Chad to Chad–Libya border, the south, Niger to Libya–Niger border, the southwest, Algeria to Algeria–Libya border, the west, and Tunisia to Libya–Tunisia border, the northwest. With an area of almost , it is the 4th-largest country in Africa and the Arab world, and the List of countries and outlying territories by total area, 16th-largest in the world. Libya claims 32,000 square kilometres of southeastern Algeria, south of the Libyan town of Ghat, Libya, Ghat. The largest city and capital is Tripoli, Libya, Tripoli, which is located in northwestern Libya and contains over a million of Libya's seven million people. Libya has been inhabited by Berber people, Berbers since the late Bronze Age as descendants from Iberomaurusian and Capsian cultures. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jebel Akhdar (Libya)
The Jebel Akhdar ( , , ) is a heavily forested, fertile upland area in northeastern Libya. It is located in the modern ''shabiyahs'' or districts of Derna, Jabal al Akhdar, and Marj. Geography The Jebel Akhdar consists of a mountainous plateau rising to an altitude of , cut by several valleys and wadis. It forms the north-western part of the peninsula that sticks north into the Mediterranean Sea, with the Gulf of Sidra on the west, and the Levantine Basin on the east. It runs from Bengazi eastward to just east of Derna, fronting the coast for about . Due to erosion and deposition, the plateau is sometimes as much as from the shore, but it forms cliffs on the headlands. The final uplift and arching of the plateau was completed in the Miocene. The region is one of the very few forested areas of Libya, which taken as a whole is one of the least forested countries on Earth. The Jebel Akhdar is the wettest part of Libya, receiving some of precipitation annually. The high ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wadi
Wadi ( ; ) is a river valley or a wet (ephemerality, ephemeral) Stream bed, riverbed that contains water only when heavy rain occurs. Wadis are located on gently sloping, nearly flat parts of deserts; commonly they begin on the distal portions of alluvial fans and extend to inland sabkhas or dry lakes. Permanent channels do not exist, due to lack of continual water flow. Water percolates down into the stream bed, causing an abrupt loss of energy and resulting in vast deposition. Wadis may develop dams of sediment that change the stream patterns in the next flash flood. Wadis tend to be associated with centers of human population because sub-surface water is sometimes available in them. Nomadic and pastoral desert peoples will rely on seasonal vegetation found in wadis, even in regions as dry as the Sahara, as they travel in complex transhumance routes. The centrality of wadis to water – and human life – in desert environments gave birth to the distinct sub-field of wadi h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Africa
North Africa (sometimes Northern Africa) is a region encompassing the northern portion of the African continent. There is no singularly accepted scope for the region. However, it is sometimes defined as stretching from the Atlantic shores of the Western Sahara in the west, to Egypt and Sudan's Red Sea coast in the east. The most common definition for the region's boundaries includes Algeria, Egypt, Libya, Morocco, Tunisia, and Western Sahara, the territory territorial dispute, disputed between Morocco and the list of states with limited recognition, partially recognized Sahrawi Arab Democratic Republic. The United Nations’ definition includes all these countries as well as Sudan. The African Union defines the region similarly, only differing from the UN in excluding the Sudan and including Mauritania. The Sahel, south of the Sahara, Sahara Desert, can be considered as the southern boundary of North Africa. North Africa includes the Spanish cities of Ceuta and Melilla, and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ephemerality
Ephemerality (from the Greek word , meaning 'lasting only one day') is the concept of things being transitory, existing only briefly. Academically, the term ephemeral constitutionally describes a diverse assortment of things and experiences, from digital media to types of streams. "There is no single definition of ephemerality". With respect to unique performances, for example, it has been noted that " hemerality is a quality caused by the ebb and flow of the crowd's concentration on the performance and a reflection of the nostalgic character of specific performances". Because different people may value the passage of time differently, ephemerality may be a relative, perceptual concept: "In brief, what is short-lived may not be the object itself, but the attention we afford it".Ronald Beiner, ''Political Philosophy: What It Is and Why It Matters'' (2014), p. 10. Ephemerality and nature Geographical features An ephemeral stream is that which only exists following precipitation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stream Bed
A streambed or stream bed is the bottom of a stream or river and is confined within a Stream channel, channel or the Bank (geography), banks of the waterway. Usually, the bed does not contain terrestrial (land) vegetation and instead supports different types of aquatic vegetation (aquatic plant), depending on the type of streambed material and water velocity. Streambeds are what would be left once a stream is no longer in existence. The beds are usually well preserved even if they get buried because the banks and canyons made by the stream are typically hard, although soft sand and debris often fill the bed. Dry, buried streambeds can actually be underground water pockets. During times of rain, sandy streambeds can soak up and retain water, even during dry seasons, keeping the water table close enough to the surface to be obtainable by local people. The nature of any streambed is always a function of the flow dynamics and the local geologic materials. The climate of an area wil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rain
Rain is a form of precipitation where water drop (liquid), droplets that have condensation, condensed from Water vapor#In Earth's atmosphere, atmospheric water vapor fall under gravity. Rain is a major component of the water cycle and is responsible for depositing most of the fresh water on the Earth. It provides water for hydroelectricity, hydroelectric power plants, crop irrigation, and suitable conditions for many types of ecosystems. The major cause of rain production is moisture moving along three-dimensional zones of temperature and moisture contrasts known as weather fronts. If enough moisture and upward motion is present, precipitation falls from convection, convective clouds (those with strong upward vertical motion) such as cumulonimbus (thunder clouds) which can organize into narrow rainbands. In mountainous areas, heavy precipitation is possible where upslope flow is maximized within windward sides of the terrain at elevation which forces moist air to condense and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drainage Basin
A drainage basin is an area of land in which all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, the drainage divide, made up of a succession of elevated features, such as ridges and hills. A basin may consist of smaller basins that merge at river confluences, forming a hierarchical pattern. Other terms for a drainage basin are catchment area, catchment basin, drainage area, river basin, water basin, and impluvium. In North America, they are commonly called a watershed, though in other English-speaking places, " watershed" is used only in its original sense, that of the drainage divide line. A drainage basin's boundaries are determined by watershed delineation, a common task in environmental engineering and science. In a closed drainage basin, or endorheic basin, rather than flowing to the ocean, water converges toward the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Libyan Civil War
Demographics of Libya is the demography of Libya, specifically covering population density, ethnicity, and religious affiliations, as well as other aspects of the Libyan population. All figures are from the United Nations Demographic Yearbooks, unless otherwise indicated. The Libyan population resides in the country of Libya, a territory located on the Mediterranean coast of North Africa, to the west of and adjacent to Egypt. Tripoli is the capital of the country and is the city with the largest population. Benghazi is Libya's second largest city. History Historically Berber, over the centuries, Libya has been occupied by the Phoenicians, Greeks, Romans, Arabs, and Italians. The Phoenicians had a big impact on Libya. Many of the coastal towns and cities of Libya were founded by the Phoenicians as trade outposts within the southern Mediterranean coast in order to facilitate the Phoenician business activities in the area. Starting in the 8th century BCE, Libya was under th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
