River regimes
Cards (9)
- The yukon= flows thro Alaskaclimate
- Conditions =highly variable across the seasons, winter= nearly polar summer=high temp
- flows thro diff types of climate inc tundra and mountain
- the yukonseasonality
- winter= precipitation frozen= low flow
- summer= precipitation does not freeze and snowmelt of winters precipit at ion= high flow
- the yukonhuman influence
- highly natural landscape= v little human influence on river flow
- the amazonclimate
- flows thro tropical climate
- relatively consistant high temp Abada rate of precipitation there is some seasonal precipitation-> lower river discharge
- high temp and high biodiversity-> high level of evapotranspiration
- The amazonseasonality
- consistent temp and rainfall create largely consistent river flow
- lower rainfall sept and December->lower river flow
- La Niño years= chances in rainfall= affect river discharge levels
- the amazonhuman influences
- deforestation affects interception, infiltration and surface runoff increasing the flow
- large dams used by Brazilian cities for both hydroelectric power and irrigation= more discharge above dam and reduced flow below dam
- Murray-Darling Australiaclimate
- seasonal sub tropic
- basin is in a rain shadow, surrounded by mountains collecting most of regions rain, causing periods of prolonged drought
- tribuataries north exp monsoon, tributaries south exp temperate climate
- wet(aug-nov) and dry(jan-apr) seasons causing high and low river flows
- Murray-Darlingseasonality
- high seasonal variability bc of wet and dry seasons
- impacted by changes in rainfall patterns during La Niña and El Niño yeard
- La niña = cooler sea temp and wet weather
- el Niña = opposite and less rainfall
- Murray darlinghuman influence
- water is drawn from Murray daring for use in cities and to irrigate farms
- natural flow paths of river have been altered for human access-> loft of habitat for local animals and decline in water quality