What is meant by regimen of a river?
From Wikipedia, the free encyclopedia. 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)
What is a simple river regime?
A river regime is the annual variation in the discharge or flow of a river at a particular point, and is usually measured in cumecs. the size of the river and where discharge measurements are taken along its course. the amount, seasonality and intensity of the precipitation.
What is runoff regime?
The runoff regime is a product of the temporal variation of the water balance in a catchment area and is, therefore, influenced by all the factors that control runoff. There is a long tradition of research dealing with characterisation of rivers using runoff regimes.
What is river regime Upsc?
➢ River Regime: The pattern of flow of water in a river channel over a year is known as its regime. Note: The catchments of large rivers are called river basins while those of small rivulets and rills are often referred to as watersheds. There is, however, a slight difference between a river basin and a watershed.
What is regime in geography?
The pattern of the seasonal flow of water in a river is called its regime. The main difference in the flow pattern of the Himalayan and the Peninsular rivers is caused by the climate differences.
What is a river regime explain by giving example of any two rivers?
The pattern of the seasonal flow of water in any river is called its regime. The regimes of the two Himalayan (Ganga and Jhelum) and the two peninsular (Narmada and Godavari) rivers may be called examples of the river regimes. ADVERTISEMENTS: The Ganga has its minimum flow in the period January-June.
Why do river regimes differ?
A river regime is the difference in the discharge of the river throughout the year. It is dictated by drainage basin and climatic characteristics.
What is hydrologic regime?
Hydrologic regime means the timing, volume, and duration of flow events throughout a defined period of time, which may be influenced by the climate, soils, geology, groundwater, watershed land cover, connectivity of the stream, riparian, and floodplain network, and valley and stream morphology. Sample 1.
What is a discharge in a river describe the river regime?
The discharge of a river is just the volume of water passing a certain point every second, and is calculated by multiplying the cross sectional area of the river by its velocity. The rising limb gives an indication of how fast water is reaching the channel and represents the level of water rising in the channel.
How do dams affect river regimes?
Meanwhile, regulation of dams for human activities substantially change the river flow regime, such as reducing peak flows during the flooding season and releasing during the dry season [2]. In recent years, abilities of the dams to change natural hydrologic processes have increased in many river basins.
What is hydrologic alteration?
Hydrologic alteration includes significant changes in the magnitude, duration, timing, frequency or rate-of-change of natural stream flows. EPA’s 2015 guidance clarified how states and tribes should classify waters that are impaired due to low and/or high flow alterations.
¿Qué es el régimen fluvial?
El régimen fluvial es el comportamiento del caudal de agua en promedio que lleva un río en cada mes a lo largo del año. Depende del régimen pluviométrico, pero también de la temperatura de la cuenca (que determina la mayor o menor evaporación), del relieve (en especial, de las pendientes), la geología, la vegetación y la acción humana.
¿Cuáles son los regímenes fluviales mixtos?
También existen regímenes fluviales mixtos. Lo más frecuente es que un río tenga varios tipos de alimentación, sobre todo en los ríos con una cuenca hidrográfica de gran extensión. Se distinguen los regímenes fluviales: nival de transición, nivopluvial, pluvionival y los pluviales que tienen más de una estación lluviosa.
¿Cuáles son los valores bajos del régimen fluvial?
Los valores bajos indican un régimen constante y los altos grandes irregularidades. Existe una correspondencia directa entre la aridez del clima y la irregularidad del régimen fluvial: los ríos de las zonas de clima ecuatorial presentan un caudal abundante y una oscilación del régimen relativamente escasa.
¿Cuál es la estacionalidad del régimen fluvial?
Existe un caso especial de estacionalidad del régimen fluvial: se trata de los ríos de régimen nival o de deshielo, en los que las crecidas siempre son muy violentas y se presentan en un período corto del año, cuando las temperaturas medias sobrepasan los 0º.