Drainage Basins Today we are learning to Understand
Drainage Basins Today we are learning to: • Understand what drainage basins are. • Make our very own “pop-up” drainage basin.
Quick Test • • • What is transpiration? What is surface run-off? What is evaporation? What is condensation? What is groundwater? What is precipitation?
Lesson aim: To understand drainage basins. Definition: A drainage basin is an area of land drained by a river and it tributaries.
Drainage Basins
What is a drainage basin? Mouth Where the river flows into the sea, or sometimes a lake. Tributary A river which joins a larger river. Watershed The boundary dividing one drainage basin from another- a ridge of high land. Confluence The point at which two rivers join. Catchment The area from which water drains into a particular drainage basin. Source The upland area where the river begins.
Do you know your drainage basin terminology?
Watershed The drainage basin of the Afon Caerfanell, a tributary of the River Usk, South Wales. the watershed can be clearly seen on this photograph
The confluence of two rivers
Match the label to the correct letter Watershed c Confluence Tributary b Source d a
Sketch the river showing its catchment Add the following labels – Watershed, Confluence, Tributary
Pop Up Drainage Basin
• Your book • A template • A stick of glue • Scissors • Pencil crayons- blue and brown • A pen
Cut out the template. Make sure you cut up the vertical line.
Using a brown crayon, shade around the circumference of the circle.
Using a blue crayon, shade the left triangle, draw some blue lines running from the top of the triangle and branching out towards the edge of the circle.
1 Watershed the area of high land forming the edge of a river basin. 2 Source where a river begins. 4 Confluence the point at which two rivers meet. You will now need a pen. Number the following features on your template. 3 Mouth where a river meets the sea. Tributary a small river or stream that 5 joins a larger river. 6 Channel this is where the river flows. 7 Drainage Basin this is the area of land drained by a river and its tributaries.
Glue the remaining blank triangle.
Stick the glued triangle under the shaded triangle, so it fits neatly.
Open your book to a double page. Glue the triangle and the bottom sides of the diagram. Stick this firmly across the cease of the book. The tip of the triangle should correspond to the cease.
It should look like this!
1 2 Give your diagram the title ‘River Basin’. Provide a date. Write neatly the numbers and corresponding definitions into your book. Watershed the area of high land forming the edge of a river basin. Source where a river begins. 3 Mouth where a river meets the sea. 4 Confluence the point at which two rivers meet. Tributary a small river or stream that 5 joins a larger river. 6 Channel this is where the river flows. 7 Drainage Basin this is the area of land drained by a river and its tributaries.
Close your book!
Open your book! Badge off E-Bay!
Video BBC Bitesize Drainage Basin and Water Cycle
- Slides: 26