Describe an example of river erosion along with a picture.Also describe how it has happened and what damage can occur and how this type of erosion could be prevented in future.
Answers
Explanation:
Soil erosion is agriculture’s enemy: a major environmental threat to sustainability and productivity with knock-on effects on the climate crisis and food security.
This is particularly true for places with the highest risk of erosion, such as watersheds in Indonesia, India, the Philippines and more. In these areas, protecting against soil erosion through sustainable land management can solve a multitude of problems.
Here’s a deeper look at the causes and solutions to soil erosion:
Why Is Soil Erosion Such a Big Problem?
Soil is a natural resource that may look robust and endless, but is in fact the fragile product of thousands of years of formation. Topsoil, which lies closest to the surface of the land, contains essential nutrients for crops. It is this layer of soil that is endangered by wind and water erosion. Soil erosion decreases soil fertility, which can negatively affect crop yields. It also sends soil-laden water downstream, which can create heavy layers of sediment that prevent streams and rivers from flowing smoothly and can eventually lead to flooding. Once soil erosion occurs, it is more likely to happen again.
This is a global problem. Soil is eroding more quickly than it is being formed, causing land to become unsuitable for agriculture – a particularly serious concern in a world where the population is expected to top 9 billion by midcentury. Smarter land management is a necessity.
Answer:
Weathering is a combination of mechanical breakdown of rocks into fragments and the chemical alteration of rock minerals. Erosion by wind, water or ice transports the weathering products to other locations where they eventually deposit. These are natural processes that are only harmful when they involve human activity.
