PPT-Waterfalls and Headward Erosion

FREEING THE ELWHA FREEING THE ELWHA Waterfalls Erode Down into the Bedrock and Erode Upstream to Form Gorges FREEING THE ELWHA A Waterfall Creates a Plunge Pool Below It FREEING THE ELWHA This Waterfall Eroded into a Weaker Bedrock Layer. Weathering. The breakdown do the materials of Earth’s crust into smaller pieces.. Physical Weathering. Process by which rocks are broken down into smaller pieces by external conditions.. Types of Physical weathering. 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 . Tuesday 8. th. February 2011. What is a waterfall?. Definition?. What is a waterfall?. Definition. A waterfall is a . geological formation . where flowing water rapidly drops in elevation as it flows over a steep region or a cliff.. The . surface. features of the Earth change as a result of observable physical and chemical processes . Weathering and Erosion. This is a monument . called Cleopatra’s . Needle. It was carved in Egypt around 1450B.C. The sides are carved with hieroglyphs, the writing of ancient Egypt. It stood in the dry, hot Egyptian desert for over 3000 years. During that time, the hieroglyphs remained distinct.. Antony . Lenehan. Remote Sewerage Treatment and Effluent Disposal. Site and soil. Effluent quality and quantity. Application systems- above ground or below ground. Crop/vegetation . s. election and management. 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.. Starter: Think back to the Hydrological Cycle…. Waterfall DVD. How is a Waterfall Formed?. http://. www.curriculumbits.com. /. prodimages. /details/geography/. waterfalls.html. Waterfall Leaflet for Primary Children on a School Trip. Learning objectives. To be able to . define. the . five . processes of . marine coastal . erosion. .. To be able to . explain. the . factors. . affecting coastal erosion.. To describe . the difference between concordant and discordant . Scenario #1. Flood water pounds against a canyon wall and wears it down.. Weathering. Scenario #2. Rain washing soil away from a hillside. Erosion. Scenario #3. Layers of sediment forming at the bottom of the ocean. another.. 2 . kinds:. 1) . Rill erosion. is the erosion by running water in small channels. , on the side of a slope.. 2) . Gully erosion. is when a rill channel evolves to become deep and wide.. By the end of this section you will be able..... To name and explain the causes of soil erosion.. Describe in detail how human activities can cause soil erosion.. Name and explain the primary methods of soil conservation.. What Is An . Ecoregion. ?. Ecoregion. - . a major ecosystem with distinctive geography, characteristic plants and animals, ecosystems, and receiving uniform solar radiation and moisture . Sometimes called an ecological region or bioregion. . Wided Batita . Ing. , . Ph.D. . Geomatics. . Laval . University. Québec, Canada . 28. th. April 2017. Outline. Statement of the Problem. . Methodology & Theoretical . Orientation. Findings. WHAT IS COASTAL EROSION? Coastal erosion is the endless reshaping of shorelines by waves, currents, tides, storms, ice, rain and groundwater seepage. Human activities, like construction, dredging, CO