“Arid climates can be found on every continent. They range from hot and dry deserts that see almost no rain to semiarid scrub land where rain falls intermittently. Arid climates are not suitable for most life forms. Plants and animals that make their homes in arid climates have made special adaptations to the environment.”(Patrick, 2017) While periglacial environments is defined as “Periglacial literally means ‘edge’ of glacial. Periglacial environments are found on the fringes of polar or glacial environments, e.g. in parts of Siberia, Canada and Greenland. Periglacial areas experience permanently frozen ground (permafrost). During their brief warmer summers, the ground surface layer thaws – enabling hardy plants to grow. Periglacial environments
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The amount of rainfall and intensity of temperatures affect the vegetation which cause erosion and aggradation. (Dykema et al., n.d.) explain the effects of rainfall on St Croix “Heavier runoff and snow-melt will alter the structure of the river by limiting how much sunlight can reach the bottom due to more water laden with sand. Heavier runoff causes chemicals like Nitrogen and Phosphorus to enter the river systems. These chemicals could enter the St. Croix from surrounding agricultural plots and increase productivity to unhealthy …show more content…
Ashmore and Church give some of the potential effects: “The potential impacts of increased discharge include channel enlargement and incision, a tendency toward either higher sinuosity single channels or braided patterns, increased bank erosion, and more rapid channel migration. Increased magnitude of large floods will result in sudden changes to channel characteristics that may trigger greater long-term instability of rivers. Increased frequency of large floods will tend to keep rivers in the modified and unstable state. Decreased discharge often results in channel shrinkage, vegetation encroachment into the channel, sedimentation in side channels, and channel pattern change toward more stable, single-channel patterns. In entrenched or confined valleys there maybe reductions in the stability of the valley walls, and, hence, increases in the rate of erosion caused by a greater tendency for streams to erode the valley walls. Increased valley-side erosion will increase sediment delivery to the streams with consequences for stream
The amount of rainfall and intensity of temperatures affect the vegetation which cause erosion and aggradation. (Dykema et al., n.d.) explain the effects of rainfall on St Croix “Heavier runoff and snow-melt will alter the structure of the river by limiting how much sunlight can reach the bottom due to more water laden with sand. Heavier runoff causes chemicals like Nitrogen and Phosphorus to enter the river systems. These chemicals could enter the St. Croix from surrounding agricultural plots and increase productivity to unhealthy …show more content…
Ashmore and Church give some of the potential effects: “The potential impacts of increased discharge include channel enlargement and incision, a tendency toward either higher sinuosity single channels or braided patterns, increased bank erosion, and more rapid channel migration. Increased magnitude of large floods will result in sudden changes to channel characteristics that may trigger greater long-term instability of rivers. Increased frequency of large floods will tend to keep rivers in the modified and unstable state. Decreased discharge often results in channel shrinkage, vegetation encroachment into the channel, sedimentation in side channels, and channel pattern change toward more stable, single-channel patterns. In entrenched or confined valleys there maybe reductions in the stability of the valley walls, and, hence, increases in the rate of erosion caused by a greater tendency for streams to erode the valley walls. Increased valley-side erosion will increase sediment delivery to the streams with consequences for stream