Tidal river

High school (ages 12+)
Geography

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/tidal-river

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the estuarine salinity?Characterized by brackish water, a variable mix of freshwater and saltwater
2. What is the ecological productivity?Estuaries are among the most biologically productive ecosystems globally
3. Why does a tidal river sometimes flow backwards?When the tide rises, the ocean water pushes into the river, and if the river's own flow is not strong enough, the water can move upstream, creating a temporary estuary.
4. How far can the tide reach into a tidal river?In some rivers, the tide can travel up to about 100 kilometers (62 miles) inland, changing the river's character far from the sea.

Tidal Forcing: The influence of oceanic tides on the hydrological regime of a river system.
Brackish Water: Water with a salinity level between that of freshwater and seawater, typically found in estuaries.
Flow Reversal: The phenomenon where the direction of river flow is temporarily reversed by the incoming tide.
Tidal Reach: The section of a river or estuary influenced by tidal fluctuations.