This document defines and describes various river landforms and features. It discusses river channels, riverbeds, river banks, waterfalls, canyons, V-shaped valleys, river terraces, potholes, meanders, ox-bow lakes, alluvial fans, and deltas. It provides examples of each landform and describes how they are formed by the flow of water over time.

1. 河流地形

2. 河流各部位的名稱
河道：河水經過的地方

3. 河流各部位的名稱
河床：河道底部

4. 河流各部位的名稱
河岸：河道兩側

5. 河流地形
瀑布存在的一個常見的原因河就是岩石
堅硬與柔軟的差異

6. 河流地形
瀑布形成的不同階段

7. 河流地形
美國大峽谷的河谷

8. 河流地形
V型谷(法國)

9. 河流地形
V型谷(印度)

10. 河流地形
原本的河床，受河流下切侵蝕，形成台
地就是河階

11. 河流地形
河床中壺穴

12. 河流地形
當石塊遇上河床的岩石凹處無法前進
時，會被水流帶動而打轉、磨穿，形成
一圓形孔洞

13. 河流地形
當河水流出谷地，速度變慢，泥沙淤積
形成了一個扇形的沖積扇

14. 河流地形
沖積扇從頂端到邊緣，地面緩慢降低，
坡度愈來愈小，堆積物愈來愈細。

15. 河流地形
曲流：外側水流速度快，河岸易易侵
蝕，內側水流速度慢，易形成堆積，漸
漸形成曲流。

16. 河流地形
曲流地形

17. 河流地形
漸漸的，河道愈來愈彎，形成了牛軛湖

18. 河流地形
當河水挾帶泥沙，遇到海水的水流，逐
漸淤積形成三角洲平原。

19. 圖片來源：
1. Yellowstone River. Photography. Encyclopædia Britannica Image Quest. Web. 21 Sep
2011.http://quest.eb.com/media/image.htm?mediaId=139_1913978
2. Riverbed, Illustration. Photograph. Encyclopædia Britannica Image Quest. Web. 21 Sep
2011.http://quest.eb.com/media/image.htm?mediaId=126_488149
3. Scene On River Bank. Photography. Encyclopædia Britannica Image Quest. Web. 21 Sep 2011.
http://quest.eb.com/media/image.htm?mediaId=139_2006693
4.Waterfall. Photography. Encyclopædia Britannica Image Quest. Web. 21 Sep 2011.
http://quest.eb.com/media/image.htm?mediaId=132_1239618
5. Sequence Of Illustrations Showing Formation Of Waterfall From River To Rapid. Photography.
Encyclopædia Britannica Image Quest. Web. 21 Sep 2011.
http://quest.eb.com/media/image.htm?mediaId=118_835697
6.Grand Canyon. Photography. Encyclopædia Britannica Image Quest. Web. 21 Sep 2011.
http://quest.eb.com/media/image.htm?mediaId=139_1912035
7. V-shaped Valley, Gorge Of Torr Veneon, Isere, France. Photograph. Encyclopædia Britannica Image
Quest. Web. 29 Jul 2011. http://quest.eb.com/media/image.htm?mediaId=130_566036
8.V-shaped Valley On Road Between Darcha And Rohtang Pass, Himachal Pradesh, India, Asia.
Photography. Encyclopædia Britannica Image Quest. Web. 29 Jul 2011.
http://quest.eb.com/media/image.htm?mediaId=151_2524816
9. Potholes In Riverbed. Photography. Encyclopædia Britannica Image Quest. Web. 21 Sep 2011.
10.Potholes In Riverbed. Photography. Encyclopædia Britannica Image Quest. Web. 21 Sep 2011.
11. Alluvial Fan. Photograph. Encyclopædia Britannica Image Quest. Web. 21 Sep 2011.
http://quest.eb.com/media/image.htm?mediaId=139_1891457

20. 12. NEW ZEALAND. NORTH OF CAPE TARAKIRAE, WELLINGTON. SHINGLE FAN DELTA.
ALLUVIAL FAN. Photograph. Encyclopædia Britannica Image Quest. Web. 21 Sep 2011.
http://quest.eb.com/media/image.htm?mediaId=148_1820785
13. Meandering River. Photograph. Encyclopædia Britannica Image Quest. Web. 21 Sep 2011.
http://quest.eb.com/media/image.htm?mediaId=118_797192
14. Meanders & Oxbow. Photography. Encyclopædia Britannica Image Quest. Web. 21 Sep 2011.
http://quest.eb.com/media/image.htm?mediaId=149_2046737
15. DELTA. Photograph. Encyclopædia Britannica Image Quest. Web. 21 Sep 2011.
http://quest.eb.com/media/image.htm?mediaId=131_1340915
16.River Terraces On Tsarab River Between Himalaya And Zanskar Mountains, Leh-Manali
Highway, Ladakh, India, Asia. Photography. Encyclopædia Britannica Image Quest. Web. 22
Sep 2011. http://quest.eb.com/media/image.htm?mediaId=151_2540931
17.Encyclopædia Britannica Image Quest. Web. 25 Sep 2011.
http://quest.eb.com/media/image.htm?mediaId=116_1521031