Who will help maintain our environment when the word reaches 9 billion people? Get your students engaged by exploring a career in soil and water conservation through this web quest.This would be a great sub planned activity, station activity, or homework assignment or project.
Similar to a sieve, the willows allow water to flow through but trap the sediment back. Within a year, these structures can trap up to 10cm of sediment. Over time, this increases as the willows become more established and more sediment can be kept back. After 20 to 30 years, the vegetation will have complete cover and sediment erosion is almost completely stopped.