We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byJacob McIntyre
Modified over 2 years ago
The streams found in mountains are likely to have formed relatively recently.
These young streams typically have V-shaped valleys.
The rivers tend to move fast in their upstream portions, although, some are slowed by the large rocks and boulders in the river channel.
The young mountain streams tend to have a steep slope or gradient. Slope or Gradient
Rivers move a great deal of material. The faster the water moves, the larger material that can be carried down stream.
Fast moving upstream portions can often move rocks and boulders. Downstream portions usually only transport small silts and clays.
This process tends to sort materials by size. Have you ever wondered why we have so much silt and clay in our soil?
Valleys with very steep, almost vertical sides are called canyons or gorges.
How long do you think it took to form the Grand Canyon?
Most scientists believe it took 1 to 3 million years!
A stream or river can not cut its bed any lower than the body of water into which it flows. As the stream approaches this base level, the slope and speed of the stream decrease.
The river channel becomes wider, deeper, and the volume is bigger as there are more tributaries contributing to the volume.
The river valley also changes at this point. It becomes more open, more of a U shape with a wider river floor.
The lower or downstream portion of the river is at its deepest, widest and slowest speed. It also has the largest volume and a very gentle gradient.
The river valley tends to be broad, flat and bounded by bluffs. These bottom lands are often areas that flood.
Lower portions of rivers often start to meander or form a s-shape river pattern.
Erosion is greater on the outside of the bend, deposition more on the inside.
The river can eventually cut through the meander, leaving a straighter section and an ox-bow lake.
To view an animation of this process click on this web site.
Rivers deposit the sediment they have carried as they slow down. This sediment load will often form deltas as the river flows into the quiet waters of a bay or gulf.
The river tends to be split into channels by its own deposits as it drops more sediment. As the deposits grow, they resemble the Greek letter (delta).
Alluvial Fans An alluvial fan differs from a delta in several ways. The deposit is formed on land, not in water.
Alluvial Fans Also, the sediments of these deposits are coarse sands and gravels, rather than fine silts and clays of the deltas.
Watershed A watershed, or drainage basin includes all of the land that drains into a river or bay either directly or through its tributaries.
Watershed The high land that separates one river valley or watershed from the next, is called the divide.
Can you name the large watershed that covers over 64,000 square miles and drains the area where you live?
The Chesapeake Bay Watershed!
Erosion and Deposition. Running Water is the most effective agent of erosion. Erosion is the process by which earth materials are moved by natural agents.
EROSION- The transport of weathered materials….
Streams. Major US Rivers A drainage basin a.k.a. watershed is the area of land that drains to a particular lake, wetland or ocean.
Floodplains & Floods. Young stream Mature stream Old stream Moderate Slope Steep Slope.
Water, Another Important Abiotic Factor (just like soil)
Rivers Location Profiles Processes Landforms Thames Spey Clyde Shannon Tees Ouse Tay Severn Trent Forth Main UK.
U-shaped Valley Valley V-shaped Valley Valley Cave Atoll.
Chapter Menu Chapter Introduction Lesson 1Lesson 1The Erosion- Deposition Process Lesson 2Lesson 2Landforms Shaped by Water and Wind Lesson 3Lesson 3Mass.
True or False: The Earths surface has stayed the same for thousands of years.
Building Up Earth’s Surface Unit C Chapter 6 Lesson 3 C24 – C29.
Watersheds and Stream Order. WatershedWatershed Watershed Watershed: The land drained by a river or stream and all of its tributaries. Also known as a.
Erratic. boulder transported and deposited by a glacier having a lithology different than the bedrock upon which it is sitting.
1 What happened in the Ice Age. 2 At present about 10% of the Earth's surface is ice covered, but about two million years ago the Planet's climate became.
6.1 Running Water Oceans – 97 % Glaciers/ice – 2 % Freshwater - < 1 % Water cycle = the continuous circulation of earths water supply It is powered by.
$1 Million $500,000 $250,000 $125,000 $64,000 $32,000 $16,000 $8,000 $4,000 $2,000 $1,000 $500 $300 $200 $100 Welcome.
Surface Water & Ground Water Karen Lopez & Jennifer Lopez(:
Chapter 8, Section 2. What is a glacier? Large mass of snow and ice that moves on land under its own weight.
Major Concepts §Landforms are features that make up the Earth's surface. There are many kinds of landforms. §Some landforms are created by the action.
Running Water and Groundwater Oceans – 97 % Glaciers/ice – 2 % Freshwater - < 1 % Water cycle = the continuous circulation of earths water supply It is.
Changes to the Earth’s Surface Grade 5 Science. Landforms Landforms are the physical features on the Earth’s surface such as, valleys, rivers, mountains,
This picture shows the complete journey of a river, from the source to the sea. Let’s have a look at this journey more closely.
LITHOSPHERE GLACIATION 1 Glaciation Learning Intentions Be able to understand the processes which occurred during the last ice age. Be able to describe.
Vincent Raeburn Linlithgow Academy Malcolm McDonald Bathgate Academy Linlithgow Academy.
Guided Notes on Erosion and Deposition Section 7.2.
Agents of Erosion and Deposition. Shoreline Erosion and Deposition.
Chapter 7 Sections 1-4 SOL 6.7. Earth is called the “water planet” because nearly ¾ of Earth is made up of water. 97% salt water 3% fresh water Less than.
Hosted by Mrs. Dempsey Mass Movement Water Erosion Glaciers What am I?
© 2017 SlidePlayer.com Inc. All rights reserved.