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River Regime
The river regime generally describes the character of the typical fluctuations of flow of a river, but can also refer to the mathematical relationship between the river discharge and its width, depth and slope. Thus, "river regime" can describe one of two characteristics of a reach of an alluvial river: * The variability in its discharge throughout the course of a year in response to precipitation, temperature, evapotranspiration and drainage basin characteristics (Beckinsale, 1969) * A series of characteristic power-law relationships between discharge and width, depth and slope The latter is described by the fact that the discharge through a river of an approximate rectangular cross-section must, through conservation of mass, equal :Q = \bar b h where Q is the volumetric discharge, \bar is the mean flow velocity, b is the channel width (breadth) and h is the channel depth. Because of this relationship, as discharge increases, depth, width, and/or mean velocity must increase as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discharge (hydrology)
In hydrology, discharge is the volumetric flow rate of water that is transported through a given cross-sectional area. It includes any suspended solids (e.g. sediment), dissolved chemicals (e.g. CaCO3(aq)), or biologic material (e.g. diatoms) in addition to the water itself. Terms may vary between disciplines. For example, a fluvial hydrologist studying natural river systems may define discharge as streamflow, whereas an engineer operating a reservoir system may equate it with outflow, contrasted with inflow. Theory and calculation A discharge is a measure of the quantity of any fluid flow over unit time. The quantity may be either volume or mass. Thus the water discharge of a tap (faucet) can be measured with a measuring jug and a stopwatch. Here the discharge might be 1 litre per 15 seconds, equivalent to 67 ml/second or 4 litres/minute. This is an average measure. For measuring the discharge of a river we need a different method and the most common is the 'area-velocity' method. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reach (geography)
A reach is a segment of a stream, river, or arm of the sea, usually suggesting a straight, level, uninterrupted stretch. They are traditionally defined by the capabilities of sailing boats, as a stretch of a watercourse which, because it is straightish, can be sailed in one reach (that is, without tacking). Reaches are often named by those using the river, and a reach may be named for landmarks, natural features, and historical reasons (see, for instance, Gallions' Reach, named after the family that once owned its banks). A reach may be an expanse, or widening, of a stream or river channel. This commonly occurs after the river or stream is dammed. A reach is similar to an arm, though an arm may bend and thus have multiple reaches. The term "reach" can also refer to a level stretch, as between river rapids or locks in a canal. The word may also be used more generally to refer to any extended portion or stretch of land or water, or even metaphorically. In fluvial hydrology, a r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alluvial River
An alluvial river is one in which the bed and banks are made up of mobile sediment and/or soil. Alluvial rivers are self-formed, meaning that their channels are shaped by the magnitude and frequency of the floods that they experience, and the ability of these floods to erode, deposit, and transport sediment. For this reason, alluvial rivers can assume a number of forms based on the properties of their banks; the flows they experience; the local riparian ecology; and the amount, size, and type of sediment that they carry. At a smaller spatial scale and shorter time scale, the patterns of water movement, from events such as seasonal flooding, create different patches of soils that range from aerobic to anaerobic and have differing nutrients and decomposition rates and dynamics. When looking at larger spatial scales, the topographic features have been created by glacial events, such as glaciation and deglaciation, changes in sea-levels, tectonic movements, and other events that occur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discharge (hydrology)
In hydrology, discharge is the volumetric flow rate of water that is transported through a given cross-sectional area. It includes any suspended solids (e.g. sediment), dissolved chemicals (e.g. CaCO3(aq)), or biologic material (e.g. diatoms) in addition to the water itself. Terms may vary between disciplines. For example, a fluvial hydrologist studying natural river systems may define discharge as streamflow, whereas an engineer operating a reservoir system may equate it with outflow, contrasted with inflow. Theory and calculation A discharge is a measure of the quantity of any fluid flow over unit time. The quantity may be either volume or mass. Thus the water discharge of a tap (faucet) can be measured with a measuring jug and a stopwatch. Here the discharge might be 1 litre per 15 seconds, equivalent to 67 ml/second or 4 litres/minute. This is an average measure. For measuring the discharge of a river we need a different method and the most common is the 'area-velocity' method. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conservation Of Mass
In physics and chemistry, the law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed. Therefore, the quantity of mass is conserved over time. The law implies that mass can neither be created nor destroyed, although it may be rearranged in space, or the entities associated with it may be changed in form. For example, in chemical reactions, the mass of the chemical components before the reaction is equal to the mass of the components after the reaction. Thus, during any chemical reaction and low-energy thermodynamic processes in an isolated system, the total mass of the reactants, or starting materials, must be equal to the mass of the products. The concept of mass conservation is widely used in many fields such as chemistry, mechanics, and fluid dynamics. Historic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrograph
A hydrograph is a graph showing the rate of flow ( discharge) versus time past a specific point in a river, channel, or conduit carrying flow. The rate of flow is typically expressed in cubic meters or cubic feet per second (cms or cfs). It can also refer to a graph showing the volume of water reaching a particular outfall, or location in a sewerage network. Graphs are commonly used in the design of sewerage, more specifically, the design of surface water sewerage systems and combined sewers. Terminology ;Discharge: the rate of flow (volume per unit time) passing a specific location in a river, or other channel. The discharge is measured at a specific point in a river and is typically time variant. ;Approach Segment: the river flow before the storm (antecedent flow). ;Rising limb: The rising limb of the hydrograph, also known as concentration curve, reflects a prolonged increase in discharge from a catchment area, typically in response to a rainfall event. ;Peak discharge:'the hig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Module Kander Gasterntal
Module, modular and modularity may refer to the concept of modularity. They may also refer to: Computing and engineering * Modular design, the engineering discipline of designing complex devices using separately designed sub-components * Modular function deployment, a method in systems engineering and product development * Module, a measure of a gear's pitch * Ontology modularization, a methodological principle in ontology engineering Computer software * Modular programming, a software design technique * Loadable kernel module an object file that contains code to extend the running kernel * Environment Modules, a software tool designed to help users manage their UNIX or Linux shell environment * Modula-2 or Modula-3, programming languages which stress the use of modules Computer hardware * Computer module, an early packaging technique that combined several electronic components to produce a single logic element * Memory module, a physical "stick" of RAM, an essential piece o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhône
The Rhône ( , ; wae, Rotten ; frp, Rôno ; oc, Ròse ) is a major river in France and Switzerland, rising in the Alps and flowing west and south through Lake Geneva and southeastern France before discharging into the Mediterranean Sea. At Arles, near its mouth, the river divides into the Great Rhône (french: le Grand Rhône, links=no) and the Little Rhône (). The resulting delta forms the Camargue region. The river's source is the Rhône Glacier, at the east edge of the Swiss canton of Valais. The glacier is part of the Saint-Gotthard Massif, which gives rise to three other major rivers: the Reuss, Rhine and Ticino. The Rhône is, with the Po and Nile, one of the three Mediterranean rivers with the largest water discharge. Etymology The name ''Rhône'' continues the Latin name (Greek ) in Greco-Roman geography. The Gaulish name of the river was or (from a PIE root *''ret-'' "to run, roll" frequently found in river names). Names in other languages include german: R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brigue
, neighboring_municipalities= Lalden, Mund, Naters, Ried-Brig, Simplon, Termen, Visp, Visperterminen , twintowns = Langenthal (Switzerland), Domodossola (Italy) Brig, officially Brig-Glis (french: Brigue-Glis; it, Briga-Glis), is a historic town and municipality in the district of Brig in the canton of Valais in Switzerland. The current municipality was formed in 1972 through the merger of Brig (city), Brigerbad and Glis.Amtliches Gemeindeverzeichnis der Schweiz published by the Swiss Federal Statistical Office accessed 19 July 2011 Together with other Alpine towns, Brig-Glis engages in the Alpine Town of the Year ...
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Simme
The river Simme is a tributary of the river Kander in the Bernese Oberland in the canton of Bern in Switzerland. It is approximately long and has a catchment area of . The river Simme begins at the Alpine lake of ''Flueseeli'' (lit.: "Little Lake of the Flue") () on the secluded Alpine meadow just above the ''Flueschafberg'' cliffs. But right afterwards, one level and lower, below the Flueschafberg cliffs, on the Alpine meadow called ''Rezliberg'', it converges with several creeks which have even higher springs, such as the Truebbach, the ''Rezligletscherbach'', and the ''Ammertenbach''. This area is located west of the mountain range Wildstrubel, and to the north of and below the Glacier de la Plaine Morte (), and about south of the resort of Lenk. Underneath the Rezliberg it forms the ''Simmenfälle'', several waterfalls, which have, altogether, a drop of . The river then flows roughly to the north and passes Lenk and flows towards Zweisimmen through the Obersimmental (Upper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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