Presentation on theme: "Weathering and Erosion"— Presentation transcript:
1Weathering and Erosion Created By:Madelyn DzierzynskiAnd Taryn Grasser
2WeatheringWeathering is the breaking down of rocks, soil, and minerals as well as artificial materials through contact with the Earth’s atmosphere, biota, and waters.
3ErosionErosion is the process by which soil and rock are removed from the Earth’s surface by natural process such as wind, or water flow, and then transported and deposited in other locations.
4Pictures of Different Types of Weathering Mechanical WeatheringChemical Weathering
5Pictures of Weathering and Erosion Baffin Island WaterfallOuter Banks Sandbars
6Causes of Weathering and Erosion The suns heat causes surface rocks to expand, fracture, and to get moisture on the rocks that can evaporate.
7Factors Controlling the Rate of Erosion It is impossible to play-down the importance of preventing soil erosion, but like many problems before you can address it you first have to understand it.
8USGS- Difference Between Erosion and Weathering Weathering involves two processes that often work in concert to decompose rocks. Erosion is the process by which soil and rock are removed from the Earth’s surface by natural processes.
9Soil ErosionSoil Erosion by water, wind tillage effects both agriculture and the natural environment. Soil loss, and its associated impacts, is one of the most important of today’s environmental problems.
10Study of Historic Hopi Buttes Area This project examines land use, climatic variability, and their related impacts on land surface conditions in the ecologically sensitive Hopi Buttes region of the Navajo Nation.
11Erosion in the Southwest Erosion is carving into Southwest Washington Beaches. In recent decades, new erosion hot spots have developed. Erosion is also cutting into Cape Disappointment State Park up to 90 camp sites could be lost.
12Coastal Erosion Prevention Coastal erosion is a global problem. On the Alaskan coast, it amounts to 45 feet per year. However, there are measure that can prevent coastal erosion. Coastal structures are used in coastal defense schemes with the objective of preventing shoreline erosion and flooding of the adjacent coastal areas.
13Wind Erosion Prevention Wind erosion happens when the soil is left unprotected from the strong winds. The loss of topsoil lowers the quality of the soil.
14Beach Erosion Prevention Study Recognizing the importance of the state's beaches, the Florida Legislature in 1986 adopted a posture of protecting and restoring the state's beaches through a comprehensive beach management planning program
15Geologic Hazards: Landslides Landslides constitute a major geologic hazard because they are wide spread, and they occur in all 50 states and U.S. territories, and cause $1-2 billion in damages and more than 25 fatalism on average each year.
16Federal Emergency Management Agency Landslides and Mudflows Even if you feel you live in a community with a low risk of flooding, remember that anywhere in rains, it can flood. Expansion of urban and recreational developments into hillside areas leads to more people that are threatened by landslides each year.
17SolutionVegetation is a key factor in erosion prevention, particularly on steep slopes. Retaining native trees, shrubs and grasses on a site that is being developed can greatly reduce future erosion damage, and offset the cost of preserving them. Conserving a natural wetland, within or next to a new development, an provide valuable storm water detention, which helps to prevent flood damage. Soil that has been compacted by heavy pedestrian traffic is more prone to erosion. Well built trails, set back from the edge of streams, can minimize this problem CONTINUED-----
18SolutionReducing impervious surfaces is very helpful for preventing erosion damage in streams, as volume of runoff is thud greatly reduced. There are many agriculture practices that reduce erosion damage and limit the loss of valuable topsoil.