Down: |
1. | Drainage system formed when rain falls on the top of a dome shape where it may run off the surface in any direction. |
3. | A vertical hole into which a surface stream flows, or used to flow. It may also be known as a pot hole or a swallow hole. |
5. | Raised banks of alluvium along the edges of an old river. When a river floods its banks, the water spreads out and rapidly loses its load carrying ability. Deposition occurs close to the banks, increases their height. |
7. | A valley, usually on either limestone or chalk, which should contain a stream but doesn't. This is caused by the water table level being below the land surface. |
9. | A bed of rock which allows water to percolate through it and accumulate within the spaces between the rock particles. |
10. | The point at which a river starts. |
11. | A small ,narrow and usually long channel on a hillside created by flowing water. |
14. | A hollow in the side of a chalk valley. SOUNDS like a word for a corrie. |
15. | The part of a river where it enters the sea, a lake or even another larger river. |
17. | A river which does not flow down the main slope of the land. |
18. | The classical landscape of Limestone areas, featuring limestone pavements, caves, swallow holes, and other limestone features. Almost all drainage is below the surface, leaving the ground very dry and barren. |
19. | The inside edge of a meander. |
23. | This form of drainage develops on a surface composed of alternate layers of hard and soft rocks which all dip in the same direction. |
24. | A valley with vertical walls created by the headward migration of a waterfall. |
25. | The level of the groundwater, or the level below which the rocks are saturated with water. |
28. | The area of land drained by a main river and its tributaries. |
29. | A flat area of land on either side of a river. The soil consists of alluvium which is deposited every time the river floods and overflows it's banks. |
31. | A meander in a river course which is literally cut off from the present river. When a meander has almost formed a complete loop, the narrow neck of land may be eroded in flood conditions, allowing the river to by-pass the bend. |
34. | A river or stream which feeds a larger water course. |
36. | When a river crosses a band of hard rock differential erosion occurs. The hard rocks erode less quickly than the softer rocks below them. This steepens the river gradient and increases the velocity of the water. These will be formed where the water rushes over the hard rocks producing white water as it speeds down the steepened section. |