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 Moving water is the major agent of the erosion that has shaped Earths land surface. Methods of soil conservation (ch3). The key aspects discussed in this chapter are:. Windbreaks. Contour ploughing. Stubble planting. Terraces. Stone walls. Reduce farming in dry weather. Windbreaks. Reforestation. 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.. 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. Chad Lentz. Why Care?. Removes valuable topsoil. Carries away expensive nutrients. Increase tillage costs to fix. Creates algae blooms and dead zones due to excess nutrients in waterways. Types of Erosion. 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.. Chapter 4.1. Pages 118-127. 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?. PROCESSES. Generate runoff. Saturation excess. Infiltration excess. INFLUENCES. Hydraulic soil properties. Conductivity. Compaction/use history. Ground cover (interception). Antecedent conditions. Existing moisture. Lesson 1. Water Erosion. How does Moving Water Cause Erosion?. Erosion is the process in which sediment that has been broken down through weathering is moved.. Agents of Erosion are:. Water. Wind. Glacial (ice). 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 . 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 . - running water is the most effective agent of erosion. - gravity draws surface water downhill, which allows the water to erode soil and rock materials. - rivers also eventually leave their eroded materials behind, which we refer to as . 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. areas. : . facts. , . issues. , and . perspectives. Caring. . for. . Soil. – . Where. . Our. . Roots. . Grow. Outline. :. ->. Definitions. (focus on water . erosion. ). ->. Facts. /. examples.