In this situation the gradient at each point along the river is sufficient to discharge the water and load but there is little excess energy available for further erosion.

All the while, the algorithm didn’t show you any cards on Haiti, Monserrat or Kobe, that you knew well, so you got up to speed in super quick time! Potholes are cylindrical holes drilled into the rocky bed of a river by turbulent high-velocity water loaded with pebbles.

The shape of the channel influences the velocity of the river In the upper course there is a large wetted perimeter. Attrition rounds and smooth's the pebbles caught in the hole and helps to reduce the size of the bedload. Such a balance between energy and work cannot occur at a particular moment in time but is suggested as an average position over a long time.

Sand particles are moved by lower entrainment velocities than smaller silts and clays or larger gravels. Use this flashcard set to learn about the Age of Discovery and the countries and explorers who traveled the world and sparked a new global trade of ideas, products, and people.Since the 1960’s it has been heavily managed and artificial channels and culverts were built to divert it beneath the ground surface as it passed through Greenwich. Lateral erosion occurs more frequently in the middle and low stretches of the river, where the valley floor lies closer to sea level.

You’ll find that these multiple-choice questions are very similar to what you’ll encounter when you sit down to take your AP Human Geography exam, but they won’t be the exact questions. The feedback goes further than just telling you what the right answer is – it also explains why the correct answer is the appropriate choice. The river channel adjusts in shape and size to accommodate changes in the volume of water and sediment. When you finally rate that flashcard a “5” you’ll have moved onto new subject matter and that flashcard will be shown very infrequently. Boats were afloat on the main runway at Sylhet airport and all domestic and internal flights had to be suspended.However, global warming, deforestation, and pollution are some of the modern day threats that geography is averting. The parks flood storage capacity of 85,000m³ has reduced the risk of flooding for 600 homes and businesses in Greenwich and Lewisham and has created a diverse environment for wildlife. The flood also caused serious damage to infrastructure – including roads, bridges, embankments, railway lines. The very finest particles travel furthest into the lake before deposition and form the bottomset beds.