4.6 - Floodplains and Meanders

A meander is best described as:

The outer bank of a meander is usually shaped mainly by:

Deposition on the inner bank of a meander forms a:

A river cliff is MOST likely to be found on the:

A floodplain is best described as:

In a meander bend, the fastest flow is usually closest to the:

Which memory rule correctly matches bank to process?

A student stands at a bend on the Rio Cobre (Jamaica). One bank is steep and undercut; the opposite bank has a gentle sandy slope. Which pairing is correct?

Which change would MOST likely increase erosion on the outer bank of a meander?

During a flood, water spreads over the floodplain and slows down. What is MOST likely to be deposited over the floodplain surface?

On a map of a lowland section of the Demerara River (Guyana), the channel shows repeated smooth bends. This suggests the river is flowing mainly across a:

A river’s velocity is 1.8 m/s near the outer bank and 0.6 m/s near the inner bank of a bend. Which process is MOST likely at each bank?

Which statement best explains why point bars form on the inner banks of meanders?

Meander migration across a floodplain is mainly caused by:

A student says: “Point bars form on the outer bank because that is where the river is fastest.” What is the best correction?

An outer bank erodes at 0.7 m per year. Approximately how far will the river cliff move in 5 years?

Which set of statements is correct? 1. Meanders are smooth, regular curves. 2. River cliffs form by erosion on the outer bank. 3. Point bars form by deposition on the inner bank. 4. Floodplains are narrow, steep-sided valleys.

A family plans to build a small shop beside a meandering river on a Trinidad lowland. Which site is MOST at risk of bank collapse over time?

After a major flood on the Berbice River (Guyana), farmers find a thin layer of fine mud spread over fields on the floodplain. What does this best show?

Which explanation best links meanders to the creation of wide floodplains?

A field sketch shows a bend with a deep channel against one bank and shallow water with sand on the opposite bank. Which interpretation is MOST accurate?

Which statement provides a correct summary of meanders and river mechanics?