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Lappkärret
Lappkärret is a small lake in Norra Djurgården in north-eastern Stockholm, Sweden, near Stockholm University. It is one of six lakes in Djurgården, the others being: Lillsjön, Uggleviken, Isbladskärret, Laduviken, and Spegeldammen. Through its location in the Royal National City Park, it is considered as a lake of great recreational value, especially popular among ornithologists and frequently used in classes at the Stockholm University located nearby. As the name implies, it used to be a marsh until construction works for the student apartments at Lappkärrsberget punctured a subsoil spring in the 1960s. Today, the lake empties into the strait Lilla Värtan through a culvert and forms part of a proposed nature reserve in Norra Djurgården. Catchment area Most of the catchment area is composed of open fields and areas of spruce and deciduous forest, with a single trafficked road passing west of the lake. Next to a group of nearby allotment-gardens is a 4-H farmya ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lillsjön, Djurgården
Lillsjön () is a small, former lake in Norra Djurgården, a semi-rural area in north-eastern central Stockholm, Sweden, forming part of the Royal National City Park. Today transformed into a wetland, it is often mentioned as one of the six lakes in the area, the other being: Laduviken, Uggleviken, Isbladskärret, Lappkärret, and Spegeldammen. Lillsjön used to be connected to other lakes in the area through narrow straits. Through a project sponsored by the World Wide Fund for Nature, water was pumped into the small basin reinforced by new embankments. Reed was also burnt away, and the former lake thus transformed into a shore meadow attracting many birds, starting with northern lapwings in March, followed by common snipes later in spring. In autumn, many birds rest here on their way south, such as wood sandpipers, common redshanks, greenshanks, and ruffs. Upptäck A striking feature at Lillsjön are the Highland cattle residing there from May to October. Not only d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spegeldammen
Spegeldammen () is a small lake in Norra Djurgården in north-eastern central Stockholm, Sweden. It is one of six lakes in Djurgården, the others being Lillsjön, Uggleviken, Isbladskärret, Laduviken, and Lappkärret. Located in the Royal National City Park, Spegeldammen is considered of great recreational value and forms part of a proposed nature reserve. It was created in the early 1980s after a shooting range here was closed and is today leased by an angling club for catch-and-release fishery. Catchment area The catchment area is dominated by open meadows with oaks in the patches of forest. During most of the 20th century, the area found use as a shooting range, and as a waterlogged marsh where excavated earth and other material was dumped. The range was discontinued in 1978 and shortly thereafter sediments from the nearby Laduviken and other excavated material was disposed within the present catchment area of Spegeldammen, and the lake was created in connection wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laduviken
Laduviken () is a lake in Norra Djurgården, a semi-rural area in north-eastern Stockholm, Sweden, forming part of the Royal National City Park. It is one of six lakes in Djurgården, the others being: Lillsjön, Uggleviken, Isbladskärret, Lappkärret, and Spegeldammen. Catchment area Most of the catchment area is composed of open grassland with scattered oaks and other hardwood. West of the lake, the buildings of the Stockholm University take up some 20 per cent of the surface and a few roads, a traffic route, the suburban railway Roslagsbanan, and the subterranean metro passes through the area. East of the lake are some minor one-family houses and commercial buildings. The terrain north of the lake is flat while the southern shore is steep and, as the area west of the lake is drained by a ditch dug through a filled-up wetland, most of the catchment area is located there and most of the inflow comes from an ooze and oil separator treating water from human-made structures ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isbladskärret
Isbladskärret is a small lake on Djurgården, an island in central Stockholm, Sweden. The lake is much appreciated among bird-watchers, and, being part of the Royal National City Park, also carefully monitored by several organizations, including the World Wide Fund for Nature. The lake is one of six in Djurgården (including Northern Djurgården, north of the island), the others being Lillsjön, Djurgården, Lillsjön, Uggleviken, Spegeldammen, Lappkärret, and Laduviken. Origin of the name The name is derived from a small hunter's lodge located near the present lake. In historical records documenting fishing grounds on Djurgården during the 17th century, the lodge is unintelligibly called ''Isbla''. The same lodge also gave name to a bay, Isbladsviken. Most Stockholmer's today are likely to interpret the name as ''Is-blads-kärret'' ("The Ice Leaf Marsh"). History The area was originally a marsh separating the northern and southern parts of Djurgården until the 1830s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alkali
In chemistry, an alkali (; from the Arabic word , ) is a basic salt of an alkali metal or an alkaline earth metal. An alkali can also be defined as a base that dissolves in water. A solution of a soluble base has a pH greater than 7.0. The adjective alkaline, and less often, alkalescent, is commonly used in English as a synonym for basic, especially for bases soluble in water. This broad use of the term is likely to have come about because alkalis were the first bases known to obey the Arrhenius definition of a base, and they are still among the most common bases. Etymology The word ''alkali'' is derived from Arabic ''al qalīy'' (or ''alkali''), meaning (see calcination), referring to the original source of alkaline substances. A water-extract of burned plant ashes, called potash and composed mostly of potassium carbonate, was mildly basic. After heating this substance with calcium hydroxide (''slaked lime''), a far more strongly basic substance known as ''caustic potash ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deciduous Forest
In the fields of horticulture and botany, the term deciduous () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, after flowering; and to the shedding of ripe fruit. The antonym of deciduous in the botanical sense is evergreen. Generally, the term "deciduous" means "the dropping of a part that is no longer needed or useful" and the "falling away after its purpose is finished". In plants, it is the result of natural processes. "Deciduous" has a similar meaning when referring to animal parts, such as deciduous antlers in deer, deciduous teeth (baby teeth) in some mammals (including humans); or decidua, the uterine lining that sheds off after birth. Botany In botany and horticulture, deciduous plants, including trees, shrubs and herbaceous perennials, are those that lose all of their leaves for part of the year. This process is called abscission. In some ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allotment (gardening)
An allotment (British English), is a plot of land made available for individual, non-commercial gardening for growing food plants, so forming a kitchen garden away from the residence of the user. Such plots are formed by subdividing a piece of land into a few or up to several hundred parcels that are assigned to individuals or families, contrary to a community garden where the entire area is tended collectively by a group of people. The term "victory garden" is also still sometimes used, especially when a garden dates back to the World War I, First or World War II, Second World War. The individual size of a parcel typically suits the needs of a family, and often the plots include a shed for tools and shelter, and sometimes a hut for seasonal or weekend accommodation. The individual gardeners are usually organised in an allotment association, which leases or is granted the land from an owner who may be a public, private or ecclesiastical entity, and who usually stipulates that it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stormwater
Stormwater, also written storm water, is water that originates from precipitation (storm), including heavy rain and meltwater from hail and snow. Stormwater can soak into the soil ( infiltrate) and become groundwater, be stored on depressed land surface in ponds and puddles, evaporate back into the atmosphere, or contribute to surface runoff. Most runoff is conveyed directly as surface water to nearby streams, rivers or other large water bodies (wetlands, lakes and oceans) without treatment. In natural landscapes, such as forests, soil absorbs much of the stormwater. Plants also reduce stormwater by improving infiltration, intercepting precipitation as it falls, and by taking up water through their roots. In developed environments, such as cities, unmanaged stormwater can create two major issues: one related to the volume and timing of runoff ( flooding) and the other related to potential contaminants the water is carrying (water pollution). In addition to the pollutants carr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lilla Värtan
Lilla Värtan () or simply Värtan is a strait in Stockholm, Sweden. Separating mainland Stockholm from the island and municipality Lidingö, it stretches from Blockhusudden in the south to Stora Värtan in the north, and is joined by the Stocksundet mid-way. Two bridges, collectively called Lidingöbron ("Lidingö Bridge") stretch over the strait. While most of the coasts surrounding the strait are occupied by industries and the ferry terminals and oil tanks in the harbour area of Värtahamnen, natural beaches are found in both the southern and the northern end of the strait and the strait forms part of the Royal National City Park. Most common fish species are Baltic herring, sea trout, and salmon. Stationary predator fishes, e.g. northern pike and perch, are exposed to raised levels of mercury (element), mercury. The area is considered an important wintering location for several birds species, including swans, Eurasian coot, common pochard, tufted duck, black-headed gull, l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nature Reserve
A nature reserve (also known as a wildlife refuge, wildlife sanctuary, biosphere reserve or bioreserve, natural or nature preserve, or nature conservation area) is a protected area of importance for flora, fauna, funga, or features of geological or other special interest, which is reserved and managed for purposes of Conservation (ethic), conservation and to provide special opportunities for study or research. They may be designated by government institutions in some countries, or by private landowners, such as charities and research institutions. Nature reserves fall into different IUCN protected area categories, IUCN categories depending on the level of protection afforded by local laws. Normally it is more strictly protected than a nature park. Various jurisdictions may use other terminology, such as ecological protection area or private protected area in legislation and in official titles of the reserves. History Cultural practices that roughly equate to the establishmen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saline Water
Saline water (more commonly known as salt water) is water that contains a high concentration of dissolved salts (mainly sodium chloride). On the United States Geological Survey (USGS) salinity scale, saline water is saltier than brackish water, but less salty than brine. The salt concentration is usually expressed in parts per thousand (permille, ‰) and parts per million (ppm). The USGS salinity scale defines three levels of saline water. The salt concentration in slightly saline water is 1,000 to 3,000 ppm (0.1–0.3%); in moderately saline water is 3,000 to 10,000 ppm (0.3–1%); and in highly saline water is 10,000 to 35,000 ppm (1–3.5%). Seawater has a salinity of roughly 35,000 ppm, equivalent to 35 grams of salt per one liter (or kilogram) of water. The saturation level is only nominally dependent on the temperature of the water. At one liter of water can dissolve about 357 grams of salt, a concentration of 26.3 percent by weight (% w/w). At (the boiling temper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
