1. Landform Geography
Fluvial Landforms

2. Stream Gradation
Streams evolve to carry just the amount of sediment produced by their drainage basin

3. Meandering Stream
Stream carrying mostly suspended load usually has deep channel curving side-to-side

4. Evolution of a Graded Stream
Base Level – lowest level at which a stream can erode its channel bed – can rise & fall with changes in sea or land level

5. Niagara Falls Upstream (Lake Erie) 571 ft elev
Downstream (Lake Ontario) 243 ft elev
Has retreated almost 7 miles in past 12,000 yrs

6. Development of Graded Stream with Wide Floodplain

7. Development of Graded Stream with Wide Floodplain

8. Stream Meandering

9. Oxbow Lake

10. Floodplain Features

11. Alluvial Fans
Created by alluvial aggradation in areas of high relief where bedload- dominated streams flow out of mts onto plain – stream sweeps side to side over time, making fan shape – most common in desert climates

12. Common Drainage Pattern Types

13. Drainage Density Total length of all streams Drainage Density =
Area of drainage basin

14. Stream Ordering Represents stream size
Smallest streams in basin order 1 – order rises when 2 streams of same order come together at confluence

15. Hydraulic Variables

16. Mississippi River Floods - 1993