PPT-Water Erosion

Chapter 41 Pages 118127 Key Questions How does moving water cause erosion What land features are formed by water erosion and deposition The GREAT BLUE HOLE p 118 Where is it located. in Poland. This project has been funded with support from the European Commission.. This publication reflects the views only of the author, and the . Commision. cannot be held responsible for any use which may be of the information contained therein.. 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.. 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. 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.. 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. 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.. . (“Flow-Assisted”. . or “Flow-Accelerated”. . Corrosion). An increase in corrosion brought about by a high relative velocity between the corrosive environment and the surface.. Removal of the metal may be:. 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 Erosion?. Erosion is defined as removal of rocks and soil by wind, water, ice and gravity.. Wind, water, ice and gravity are also known as the agents of erosion.. Weathering vs. Erosion . Weathering involves two processes . 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 The creation of sedimentary rocks. Weathering and Mass Movement. Objectives:. 1. Describe the processes by which erosion wears down and carries away rock. 2. Distinguish between chemical and mechanical weathering. 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. .