|
Zhrebchevo Reservoir
Zhrebchevo Reservoir () is a large dam and reservoir in central Bulgaria, situated between the Sub-Balkan valleys of Kazanlak and Tvarditsa that lie between the Balkan Mountains to the north and the Sredna Gora mountain range to the south. Administratively, the reservoir is located in the municipalities of Gurkovo and Nikolaevo of Stara Zagora Province and Tvarditsa and Nova Zagora of Sliven Province. Close to its shores are the towns of Gurkovo and Nikolaevo, as well as the villages of Panicherevo, Banya, and Asenovets. History and geography The dam was constructed between 1959 and 1966 on the river Tundzha, the longest tributary of the Maritsa. Its main purpose is to level the river discharge and to provide water for irrigation in the northeastern parts of the Upper Thracian Plain, as well as to the Sliven Valley and Yambol Field. Part of the water is used for industrial water supply. Zhrebchevo Reservoir is owned by the state company "Irrigation Systems". The reservo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kazanlak Valley
Kazanlak ( , known as Seuthopolis () in ancient times, is a List of cities and towns in Bulgaria, town in Stara Zagora Province, Bulgaria. It is located in the middle of the plain of the same name, at the foot of the Balkan Mountains, Balkan mountain range, at the eastern end of the Rose Valley, Bulgaria, Rose Valley. It is the administrative centre of the homonymous Kazanlak Municipality. The town is among the 15 biggest industrial centres in Bulgaria, with a population of 44,760 people as of Dec 2017.Bulgarian National Statistical Institute – towns in 2017 It is the center of rose oil extraction in Bulgar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asenovets
Asenovets () is a village in central Bulgaria. It has a population of 650 as of 2024. Geography Asenovets is located in Sliven Province and has a territory of 20.624 km2. It is part of Nova Zagora Municipality. It is situated 35 km southwest of Sliven, 6 km northwest of the municipal center Nova Zagora and 29 km northeast of the city of Stara Zagora. The village lies on the second class II-55 road that connects Veliko Tarnovo in the north and Svilengrad on the border with Turkey and Greece to the south. Asenovets is situated in the Upper Thracian Plain, at the southern foothills of the easternmost low parts of the Sredna Gora mountain range. The terrain is evenly sloping to the south and the altitude at the village center is 168 m. The climate is temperate continental. Culture The village school was established in 1868 and closed down in 2008. The Church of Saints Cyril and Methodius was constructed in 1887. The local ''chitalishte A ''chit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eurasian Carp
The common carp (''Cyprinus carpio''), also known as European carp, Eurasian carp, or simply carp, is a widespread freshwater fish of eutrophic waters in lakes and large rivers in Europe and Asia.Fishbase''Cyprinus carpio'' Linnaeus, 1758/ref>Arkive The native wild populations are considered Vulnerable species, vulnerable to extinction by the International Union for Conservation of Nature (IUCN), but the species has also been Domestication, domesticated and Introduced species, introduced (see aquaculture) into environments worldwide, and is often considered a destructive invasive species, being included in the list of the world's 100 worst invasive species. It gives its name to the carp family, Cyprinidae. Taxonomy The type subspecies is ''Cyprinus carpio carpio'', native to much of Europe (notably the Danube and Volga Rivers).Jian Feng Zhou, Qing Jiang Wu, Yu Zhen Ye & Jin Gou Tong (2003). Genetic divergence between ''Cyprinus carpio carpio'' and ''Cyprinus carpio haematopterus' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Pike
The northern pike (''Esox lucius'') is a species of carnivorous fish of the genus ''Esox'' (pikes). They are commonly found in brackish water, moderately salty and fresh waters of the Northern Hemisphere (''i.e.'' holarctic in distribution). They are known simply as a pike (Plural, : pike) in Great Britain, Ireland, most of Eastern Europe, Canada and the United States, U.S., although in the Midwestern United States, they may just be called a Northern. Pike can grow to a relatively large size. Their average length is about , with maximum recorded lengths of up to and maximum weights of . The International Game Fish Association, IGFA currently recognises a pike caught by Lothar Louis on Greffern Lake, Germany, on 16 October 1986, as the all-tackle world-record holding northern pike. Northern pike grow to larger sizes in Eurasia than in North America, and in coastal Eurasian regions than inland ones. Etymology The northern pike gets its common name from its resemblance to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wels Catfish
The wels catfish ( or ; ''Silurus glanis''), also called sheatfish or just wels, is a large species of catfish native to wide areas of central, southern, and eastern Europe, in the basins of the Baltic, Black and Caspian Seas. It has been introduced to Western Europe as a prized sport fish and is now found from the United Kingdom east to Kazakhstan and China and south to Greece and Turkey. Etymology The English common name comes from Wels, the common name of the species in German language. ''Wels'' is a variation of Old High German ''wal'', from Proto-Germanic ''*hwalaz'' – the same source as for ''whale'' – from Proto-Indo-European ''*(s)kʷálos'' ('sheatfish'). Evolution The earliest known fossil remains of the wels catfish are from the late Miocene (about 5.3 million years ago) of Ukraine. Potentially slightly older but less well-preserved remains from 6-7 million years ago are also known from the same region. During this time period, the dominant catfish in eastern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zander
The zander (''Sander lucioperca''), sander or pikeperch, is a species of ray-finned fish from the Family (biology), family Percidae, which also includes perch, Gymnocephalus, ruffe and Darter (fish), darter. It is found in freshwater and brackish habitats in western Eurasia. It is a popular game fish and has been introduced to a variety of localities outside its native range. It is the type species of the genus ''Sander''. Taxonomy The zander was first formally Species description, described in 1758 as ''Perca lucioperca'' by Carolus Linnaeus in volume 1 of the tenth edition of ''Systema Naturae'' and he gave the Type locality (biology), type locality as "European lakes". When Lorenz Oken (1779–1851) created the genus ''Sander (fish), Sander'' he made ''Perca lucioperca'' its type species. The zander is part of the European clade within the genus ''Sander'' which split from a common ancestor with the North American clade, which the walleye (''S. vitreus'') and the sauger (''S. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
European Perch
The European perch (''Perca fluviatilis''), also known as the common perch, redfin perch, big-scaled redfin, English perch, Euro perch, Eurasian perch, Eurasian river perch, Hatch, poor man's rockfish or in Anglophone parts of Europe, simply the perch, is a predatory freshwater fish native to Europe and North Asia. It is the type species of the genus '' Perca''. The perch is a popular game fish for recreational anglers, and has been widely introduced beyond its native Eurasian habitats into Australia, New Zealand and South Africa. Known locally simply as "redfin", they have caused substantial damage to native fish populations in Australia and have been proclaimed a noxious species in New South Wales. Taxonomy The first scientific description of the river perch was made by Peter Artedi in 1730. He defined the basic morphological signs of this species after studying perch from Swedish lakes. Artedi described its features, counting the fin rays scales and vertebrae of the typ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iconostasis
In Eastern Christianity, an iconostasis () is a wall of icons and religious paintings, separating the nave from the sanctuary in a Church (building), church. ''Iconostasis'' also refers to a portable icon stand that can be placed anywhere within a church. The iconostasis evolved from the Byzantine architecture, Byzantine templon, a process complete by the 15th century. A direct comparison for the function of the main iconostasis can be made to the layout of the great Temple in Jerusalem. That Temple was designed with three parts. The holiest and inner-most portion was that where the Ark of the Covenant was kept. This portion, the Holy of Holies, was separated from the second larger part of the building's interior by a curtain, the parochet , "veil of the temple". Only the High Priest (Judaism), High Priest was allowed to enter the Holy of Holies. The third part was the entrance court. This architectural tradition for the two main parts can be seen carried forward in Christian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Francis Turbine
The Francis turbine is a type of water turbine. It is an inward-flow reaction turbine that combines radial and axial flow concepts. Francis turbines are the most common water turbine in use today, and can achieve over 95% efficiency. The process of arriving at the modern Francis runner design took from 1848 to approximately 1920. It became known as the Francis turbine around 1920, being named after British-American engineer James B. Francis who in 1848 created a new turbine design. Francis turbines are primarily used for producing electricity. The power output of the electric generators generally ranges from just a few kilowatts up to 1000 MW, though mini-hydro installations may be lower. The best performance is seen when the head height is between . Penstock diameters are between . The speeds of different turbine units range from 70 to 1000 rpm. A wicket gate around the outside of the turbine's rotating runner controls the rate of water flow through the turbine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sliven Valley
Sliven Valley () is situated in eastern central Bulgaria. It is named after the city of Sliven, its main settlement. It is the ninth of the eleven Sub-Balkan valleys in direction west–east and is the second largest of them, after the Sofia Valley. Geography The valley is enclosed between the Balkan Mountains to the north and the Sredna Gora mountain range and the heights of Bakadzhitsite and Hisar Heights, Hisar to the south. The Shivachevski Ridge separates it from the higher Tvarditsa Valley to the west, while the Terzijski Ridge of the Balkan Mountains and the Hisar Heights form the divide with the Karnobat Valley to the northeast. The northern slopes are part of Sinite Kamani Nature Park. It spans a territory of 830 km2 and is thus the second largest of the Sub-Balkan valley by area. It reaches a length of 70 km in direction west–east and is 15 km at its widest. The average altitude is 150 m and is inclined in southern direction. It is divided in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Upper Thracian Plain
The Upper Thracian Plain (, ''Gornotrakiyska nizina'') constitutes the northern part of the historical region of Thrace. It is located in southern Bulgaria, between Sredna Gora mountains to the north and west, a secondary mountain chain parallel to the main Balkan Mountains; the Rhodopes, Sakar and Strandzha to the south; and the Black Sea to the east. A fertile agricultural region, the Upper Thracian Plain proper has an area of and an average elevation of . The plain is part of Northern Thrace. The climate is transitional continental. The highest temperature recorded in Bulgaria occurred here: it was at Sadovo in 1916. The precipitation is a year. Important rivers are the Maritsa and its tributaries, Arda, Tundzha, Stryama, Topolnitsa, and Vacha. Important cities include Plovdiv, Burgas, Stara Zagora, Pazardzhik, Asenovgrad, Haskovo, Yambol and Sliven Sliven ( ) is List of cities and towns in Bulgaria, the eighth-largest city in Bulgaria and the administrative and i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irrigation
Irrigation (also referred to as watering of plants) is the practice of applying controlled amounts of water to land to help grow crops, landscape plants, and lawns. Irrigation has been a key aspect of agriculture for over 5,000 years and has been developed by many cultures around the world. Irrigation helps to grow crops, maintain landscapes, and revegetation, revegetate disturbed soils in dry areas and during times of below-average rainfall. In addition to these uses, irrigation is also employed to protect crops from frost, suppress weed growth in grain fields, and prevent soil consolidation. It is also used to cool livestock, reduce dust, dispose of sewage, and support mining operations. Drainage, which involves the removal of surface and sub-surface water from a given location, is often studied in conjunction with irrigation. There are several methods of irrigation that differ in how water is supplied to plants. Surface irrigation, also known as gravity irrigation, is the olde ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
