PPT-River erosion The process of wearing away of the rocks on the bed and banks of the river

River erosion River erosion also happens by the load carried on the river channel itself The erosion rate varies with different volume and velocity C orrasion abrasion A ttrition S olution corrosion. Weathering. , Erosion and Deposition. . How can wind and water change our landscapes?. . Weathering- the . destructive processes . by which materials at or near the Earth’s surface are changed in color, texture, composition, firmness or form. . A short introduction. Transportation. Erosion Processes. Attrition . Hydraulic action. Corrasion. Corrosion. Activity: Show the four processes of erosion in the boxes.. Try to use graphical representation as it will help you remember. . The life cycle of a river helps explain how it acts as an agent of erosion.. It should be obvious that the force of running water will create erosion in the first place. Running water will physically move objects and “carve” or erode rock formations if the motion and volume of water is continual. In the “youth” stage of river cycle, a river does just this: It carves out a path to it’s final destination over rock formations, wearing away the land as it does so. . Features of River Erosion. 1. Potholes. 2. River Valleys. 3. Gorges and Canyons. 4. Mesa and Butte. 5. Waterfalls. 1. Potholes. Potholes are formed due to stream or river erosion which initiates by simple . Chapter 4.1. Pages 118-127. Key Questions. How does moving water cause erosion?. What land features are formed by water erosion and deposition?. Moving water is the major agent of the erosion that has shaped Earth’s land surface.. . processes. Bilingual biology and geology 3º . ESO. Mª Eugenia Alba . Torreiro. How the Earth’s surface changes. Exogenous geological process:. The Earth’s surface is continually being changed and shaped by different . Water Erosion. How Does Moving Water Cause Erosion?. Erosion by water begins with a splash of rain.. Some rainfall sinks into the ground.. Some evaporates or is taken up by plants.. The rest of the water runs off over the land surface.. Rivers have become regular features in the news. In any given year, one or more rivers become notorious for their devastating floods. But for most of the time, rivers are very useful – they provide people with their livelihoods, a place to live near and are a great source of recreation and leisure. Learning to live and cope with rivers would seem to be of increasing importance. And yet, many human activities seem to make the river environment, and the human use of it, more hazardous. Is it possible for humans to live harmoniously with rivers, while benefit from them at the same time?. Longitudinal profile. Fluvial/River- Areas. The . path the river follows from its source to mouth is known as the. river's course. . . When studying rivers we often divide it into 3 main sections, the . Weathering:. Rocks that are exposed to air, water, changes in temperature and vegetation become vulnerable to weathering. Weathering is the disintegration (breaking up) and decay (decomposition) of rocks where they are formed. It . Tuesday, 10 September 2019. How do geomorphic processes shape the land?. Starter. Practice exam question. . Geomorphic Processes. What does the term . ‘geomorphic processes’ . mean?. A . geomorphic process . , Erosion and Deposition. . How can wind and water change our landscapes?. . Weathering- the . destructive processes . by which materials at or near the Earth’s surface are changed in color, texture, composition, firmness or form. . Formation of a Waterfall and Gorge. 2.. Formation of a Waterfall. A waterfall often occurs when a river flows from one rock type onto another. . For example, if the river flows from the harder rock and onto softer rocks because of the vertical movement of rocks along a fault line in the past.. Sedimentology. and . Stratigraphy. What are Sediments. Sediments are loose Earth materials (unconsolidated materials) such as sand . which are . transported by the action of water, wind, glacial ice and .