PPT-Topic: Erosion & Running Water

Earths main agent of natural erosion What is erosion Erosion is Agents of Erosion Agents of erosion include Running water is the big Kahuna of all erosional. Erosion by rivers, streams, waves, floods.. Rivers and streams often sort sediments. Large sediments are deposited upstream and small sediments are deposited downstream. . Floods to not sort sediments.. Rain . Splash. Sheet. Rill. Gully . Heavy . rains in northwest Iowa washed away soil, leaving this scarred tableau. This type of erosion, termed sheet-and-rill erosion, occurs when there is insufficient vegetation to hold soil in place. As rain falls, it forms sheets of surface water that transport soil away. As more water accumulates, it forms runoff channels called rills, which further displace soil.. How does running water . weather. rock?. Lifting – fast-moving water . pushes into cracks, lifting off rock pieces. Abrasion – Sand, pebbles and rocks carried by the water . scrape against other rock. 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.. 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.. Nancy . Rogel. Eddie . Guadarrama. . Outline. What is Soil Erosion. Types of Erosion. Factors Affecting Erosion Rates. Human Activities that increase Erosion Rates. How to Prevent Erosion. What is Soil Erosion. formation of landforms. weathering and erosion. The process of weathering and erosion are the main forces behind landscape types. . However, they are not the only reason for a plain, plateau, or a mountain region to form. . Contrast. the features left from different types of erosion.. Analyze. the impact of living and nonliving things on the processes of weathering and erosion.. Erosion and Deposition. Section 7.2. gravity: . Runoff meander . Rill. oxbow lake turbulence. Gully alluvial fan ice age. Stream delta . River. groundwater. . Tributary. sand dune. Drainage basin . Divide. . abrasion. . Flood . 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.. Chapter 9 - Section 3, 4, 5, and 6. How Water Erodes. Most sediment washes or falls into a river as a result of mass movement and runoff. Other sediment erodes from the bottom or sides of the river. Streams carry sediment in several . Runoff meander . Rill. oxbow lake turbulence. Gully alluvial fan ice age. Stream delta . River. groundwater. . Tributary. sand dune. Drainage basin . Divide. . abrasion. . Flood . 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 CONTROL LEAD. TRAINING. AK-CESCL. INSTRUCTOR:. Copyright. Alaska Stormwater Steering Committee & Creative Courses. January 2022. COURSE OBJECTIVES. Assess and manage risks of erosion and sedimentation on construction sites.