Everyday we witness erosion and deposition: beaches filled with sand, cracks in roads, and landslides. Physical erosion refers to when rocks change shape without changing chemical makeup, often as the result of forces acting upon rock particles like gravity, abrasion, plucking or raindrop impact.
Eroded sediments can build up and form rich delta soils like those in northern California. Unfortunately, however, eroded soils may also carry chemicals like pesticides and fertilizers into water supplies that threaten them.
Erosion is the natural process by which wind, water and ice wear away rock materials (sediment and soil), transporting them elsewhere to be deposited, unlike weathering which involves no movement of materials. Erosion may be caused by raindrops falling on dampened land; rivers flowing with runoff; waves breaking across shorelines; glaciers melting into seas and wind blowing towards landmasses; glacier flow calving off snow caps and glaciers melting off glaciers ; windstorms blowing across open land ; as well as human activities such as deforestation, logging over land; plowing fields before overgrazing livestock or irrigation projects which accelerate erosion over time.
Physical erosion encompasses processes such as splash erosion, where water splashes onto and loosens soil particles; mechanical erosion occurs when moving rocks collide or are rubbed against each other by flowing water (glacier erosion); plants, small animals and insects all play a part in physical erosion by growing and moving through soil; they also contribute by growing into it and moving through it themselves as they go about their daily lives. Erosion has detrimental impacts on the environment by stripping away valuable topsoil for farming and ranching purposes while decreasing biodiversity while polluting both air quality and water with dust/organic matter pollution; additionally it increases rates of sediment/nutrient runoff runoff, leading to flooding as well as changing habitats altogether.
Weathering, also known as geological weathering, refers to the process of breaking down rock, soil and other geological materials on Earth’s surface through physical, chemical and biological means. Unlike erosion which involves moving wind or water as part of its action, weathering doesn’t involve such fluid movements – thus saving time, money and the environment!
Mechanical weathering is the most prevalent form of physical weathering and includes actions such as abrasion, plucking and raindrop impact. Chemical weathering involves gradual changes to rock composition caused by natural processes. Examples include oxidation, hydrolysis and carbonation. Finally, biological weathering refers to changes triggered by microorganisms, plants or animals – for instance roots pressurizing rocks by growing into them thereby weakening them further and making it easier for breakages to take place.
Once weathered particles have been carried away by erosion, they will eventually settle back down again somewhere else. Deposition takes place when their source – gravity, ice, water or wind – no longer has enough energy to carry eroded material away; at that point they fall where they fall and create layers of sedimentary layers over time.
Attrition rates within an organization refer to the unpredictable loss of employees due to uncontrollable factors like retirement, resignation or permanent sick leave. Companies experiencing high attrition must invest considerable resources in recruitment, training and employee retention strategies in order to retain staff.
An increase in internal attrition could indicate that a company is losing talented staff, signalling an insufficient corporate culture or signs of workplace inequality or discrimination that should be addressed by management.
Landscape factors such as urbanization and land ownership can skew forest attrition patterns, creating discrepancies. Forest loss on private lands tends to be three to four times greater than loss on federal and state lands – this suggests they require higher conservation efforts than private forests do; furthermore, forest attrition on private land occurs predominantly within gap regions while losses on federal/state land occur more evenly throughout non-gap regions.
Deposition occurs when tiny pieces of Earth that have been transported away through erosion are deposited elsewhere, either locally such as when sediment settles on top of rocks after an especially harsh storm or far away, like when sediment ends up in rivers.
Natural, or geologic, erosion is responsible for many of our planet’s beautiful features. Unfortunately, erosion can also be damaging; when soil is washed away by rainstorms it can carry with it harmful pollutants such as chemicals, fertilizers and pesticides that pollute our water supply.
Erosion can create flooding issues on our coastline. To help mitigate erosion, homeowners can utilize appropriate setback distances and attend planning meetings that take into account erosion when planning future development projects. In addition, coastal armoring such as riprap (large rocks) or bulkheads may help reduce erosion on bluffs and beaches; however, sea level rise will eventually increase the amount of sediment carried inland via tides or high energy waves and will increase erosion over time.