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Pikrolimni (lake)
Lake Pikrolimni (Greek: Πικρολίμνη 'bitter lake') is an endorheic, alkaline salt lake in Kilkis prefecture, Greece. It is located on the border of the Kilkis and Thessaloniki regional units, about 40 km northwest of Thessaloniki. The lake is hypersaline, has rather shallow waters (0.5–0.7 m) and a shoreline of about 8.5 km. The water surface area shows significant seasonal variation (3.2–4.5 km2) due to evaporation in the summer months, with an average value of 3.7 km2. Pikrolimni is the only salt lake in Greece and constitutes a biotope with rare halophytic vegetation surrounded by common reeds, which is home to various common and endangered bird species. The habitat has been listed since 1996 as a Natura 2000 site of community interest and special protection area, while also protected by the Ramsar convention. The lake was known in ancient times as Chalastra (Ancient Greek: Χαλάστρα), a famous source of natron and trona for Graeco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kilkis (regional Unit)
Kilkis ( el, Περιφερειακή ενότητα Κιλκίς) is one of the regional units of Greece, in the geographic region of Macedonia. It is part of the region of Central Macedonia. Its capital is the city of Kilkis. Geography The geography of the regional unit of Kilkis is characterized by the wide and flat Axios river valley in the westcentral part, and mountain ranges on its western and northeastern edges. The mountain range in the west, on the border with Pella regional unit, is Mount Paiko (highest peak ). In the north, the Kerkini range straddles the border with North Macedonia. At the highest peak in Kilkis regional unit is located here. The border with Serres regional unit to the northeast is formed by the lower Kroussia range (highest peak ). Lake Doirani is situated in the north, shared with North Macedonia. Kilkis borders the Thessaloniki regional unit to the south. The climate of the Kilkis regional unit is humid continental in the north, and humid subt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trona
Trona (trisodium hydrogendicarbonate dihydrate, also sodium sesquicarbonate dihydrate, Na2CO3•2NaHCO3•3H2O) is a non- marine evaporite mineral. It is mined as the primary source of sodium carbonate in the United States, where it has replaced the Solvay process used in most of the rest of the world for sodium carbonate production. Etymology The word entered English by way of either Swedish () or Spanish (), with both possible sources having the same meaning as in English. Both of these derive from the Arabic ''trōn'', which in turn derives from the Arabic ''natron'', and Hebrew (''natruna''), which comes from ancient Greek (''nitron''), derived ultimately from ancient Egyptian ''ntry'' (or ''nitry'’). Natural deposits Trona is found at Owens Lake and Searles Lake, California; the Green River Formation of Wyoming and Utah; the Makgadikgadi Pans in Botswana and in the Nile Valley in Egypt. The trona near Green River, Wyoming, is the largest known deposit in the wor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geothermal Gradient
Geothermal gradient is the rate of temperature change with respect to increasing depth in Earth's interior. As a general rule, the crust temperature rises with depth due to the heat flow from the much hotter mantle; away from tectonic plate boundaries, temperature rises in about 25–30 °C/km (72–87 °F/mi) of depth near the surface in most of the world. However, in some cases the temperature may drop with increasing depth, especially near the surface, a phenomenon known as ''inverse'' or ''negative'' geothermal gradient. The effects of weather, sun, and season only reach a depth of approximately 10-20 metres. Strictly speaking, ''geo''-thermal necessarily refers to Earth but the concept may be applied to other planets. In SI units, the geothermal gradient is expressed as °C/km, K/km, or mK/m. These are all equivalent. Earth's internal heat comes from a combination of residual heat from planetary accretion, heat produced through radioactive decay, latent heat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clastic Rock
Clastic rocks are composed of fragments, or clasts, of pre-existing minerals and rock. A clast is a fragment of geological detritus,Essentials of Geology, 3rd Ed, Stephen Marshak, p. G-3 chunks, and smaller grains of rock broken off other rocks by physical weathering.Essentials of Geology, 3rd Ed, Stephen Marshak, p. G-5 Geologists use the term clastic to refer to sedimentary rocks and particles in sediment transport, whether in suspension or as bed load, and in sediment deposits. Sedimentary clastic rocks Clastic sedimentary rocks are rocks composed predominantly of broken pieces or ''clasts'' of older weathered and eroded rocks. Clastic sediments or sedimentary rocks are classified based on grain size, clast and cementing material (matrix) composition, and texture. The classification factors are often useful in determining a sample's environment of deposition. An example of clastic environment would be a river system in which the full range of grains being transported by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Percolation
Percolation (from Latin ''percolare'', "to filter" or "trickle through"), in physics, chemistry and materials science, refers to the movement and filtering of fluids through porous materials. It is described by Darcy's law. Broader applications have since been developed that cover connectivity of many systems modeled as lattices or graphs, analogous to connectivity of lattice components in the filtration problem that modulates capacity for percolation. Background During the last decades, percolation theory, the mathematical study of percolation, has brought new understanding and techniques to a broad range of topics in physics, materials science, complex networks, epidemiology, and other fields. For example, in geology, percolation refers to filtration of water through soil and permeable rocks. The water flows to recharge the groundwater in the water table and aquifers. In places where infiltration basins or septic drain fields are planned to dispose of substantial amounts of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meteoric Water
Meteoric water is the water derived from precipitation (snow and rain). This includes water from lakes, rivers, and icemelts, which all originate from precipitation indirectly. While the bulk of rainwater or meltwater from snow and ice reaches the sea through surface flow, a considerable portion of meteoric water gradually infiltrates into the ground. This infiltrating water continues its downward journey to the zone of saturation to become a part of the groundwater in aquifers. Overview Most groundwater is meteoric water. Other forms normally do not play a significant role in the hydrologic cycle. Non-meteoric forms of groundwater are connate water and magmatic water, also termed juvenile water. Connate water is trapped in rock strata at the time of formation. Because rock containing connate water is typically formed from ocean sediments, connate water is normally saline. Magmatic water rises from great depth accompanying magma intrusion and affects mineralogy. In other word ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isotope Hydrology
Isotope hydrology is a field of geochemistry and hydrology that uses naturally occurring stable and radioactive isotopic techniques to evaluate the age and origins of surface and groundwater and the processes within the atmospheric hydrologic cycle. Isotope hydrology applications are highly diverse, and used for informing water-use policy, mapping aquifers, conserving water supplies, assessing sources of water pollution, and increasingly are used in eco-hydrology to study human impacts on all dimensions of the hydrological cycle and ecosystem services. Details Water molecules carry unique isotopic "fingerprints", based in part on differing ratios of the oxygen and hydrogen isotopes that constitute the water molecule. Isotopes are atoms of the same element that have a different number of neutrons in their nuclei. Air, freshwater and seawater contain mostly oxygen-16 ( 16O). Oxygen-18 (18O) occurs in approximately one oxygen atom in every five hundred and has a slightly higher mass ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oraiokastro
Oraiokastro ( el, Ωραιόκαστρο) is a municipality in the Thessaloniki regional unit, Greece and a suburb of Thessaloniki. Municipality The municipality Oraiokastro was formed at the 2011 local government reform by the merger of the following 3 former municipalities, that became municipal units: *Kallithea *Mygdonia Mygdonia (; el, Μυγδονία / Μygdonia) was an ancient territory, part of Ancient Thrace, later conquered by Macedon, which comprised the plains around Therma (Thessalonica) together with the valleys of Klisali and Besikia, including the ... *Oraiokastro The municipality Oraiokastro has an area of 217.855 km2 and the municipal unit Oraiokastro has an area of 21.855 km2. Religious buildings The Temple of the Hellenic Gods (Ελληνων Ναος), a Hellenic temple, is located in Oraiokastro, Central Macedonia.Γιώργος Λαμπίρης/Giórgos Lampíris"Μύθοι και αλήθειες για την ελληνική Ομάδ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kilkis
Kilkis ( el, Κιλκίς) is a city in Central Macedonia, Greece. As of 2011 there were 22,914 people living in the city proper, 28,745 people living in the municipal unit, and 51,926 in the municipality of Kilkis. It is also the capital city of the regional unit of Kilkis (regional unit), Kilkis. The area of Kilkis, during the 20th century, became several times a war theatre; during the Macedonian Struggle, the Balkan Wars, WWI, WWII, the Greek Resistance and the Greek civil war. Name Kilkis is located in a region that was multi-ethnic in the recent past and is known by several different names. The name of the city in Roman times was Callicum. In the early Byzantine times was called Kallikon, and was also known as Kalkis or Kilkis by the Greeks. In Bulgarian and Macedonian, it is known as Kukush (Кукуш). In a Greek church Codеx of 1732 it is mentioned as ''Kilkisi'' (), while in a Slavic church Codеx from 1741 it is mentioned as ''Kukush'' (Кукуш, Кукоуш). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kallithea, Thessaloniki
Kallithea ( el, Καλλιθέα) is a suburb and a former municipality in the Thessaloniki regional unit, Greece. Since the 2011 local government reform it is part of the municipality Oraiokastro Oraiokastro ( el, Ωραιόκαστρο) is a municipality in the Thessaloniki regional unit, Greece and a suburb of Thessaloniki. Municipality The municipality Oraiokastro was formed at the 2011 local government reform by the merger of the foll ..., of which it is a municipal unit. Population 6,110 (2011). The municipal unit has an area of 97.494 km2. References Populated places in Thessaloniki (regional unit) {{CentralMacedonia-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pikrolimni (municipality)
Pikrolimni ( el, Πικρολίμνη) is a former municipality in the Kilkis regional unit, Greece. Since the Kallikratis Plan for local government reform was implemented in 2011, Pikrolimni is administrated as part and constitutes a municipal unit of the municipality of Kilkis. The municipal unit has an area of 164.06 km2, and its population in the 2011 census was 5,442, down from 7,395 in 2001. The seat of the municipality was Mikrokampos. The namesake of the region, as well as its most famous attraction, is the salt lake Pikrolimni which has been historically important as a source of natron in antiquity and recognised to this day for its pelo- and balneotherapeutic properties. The current municipal unit (and former municipality) is subdivided into the following municipal departments: * Mikrokampos, containing the village ''Mikrokampos'' (Μικρόκαμπος, population as of 2011: 731), earlier called ''Ali Hodzhalar'' from which chieftains of the Greek Struggl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
