Question

what are lakes in terms of geography and represent it with the help of contours ? ​

Answer 1

The first route has closely-spaced contour lines. But the second route has widely-spaced spaced contour lines. Which hiking trail would YOU take?

For the slow-and-steady climber, you’d pick the second route because widely-spaced contour lines mean the slope is gradual. But if you picked the first route, you’re the type of free climber who scales mountains with just a pick axe. This is because when contours are close together, it means that slope is steeper.

For a quick definition, a contour line joins points of equal and constant values. For example, contours on an elevation have constant heights that are the same on each line.

Are these contour lines mountains or depressions?

When you have a closed contour like the one below, this means there is a hill/mountain or depression.

depression contour

You don’t really know unless there is a label on the contour line. In the example below, we’ve added labels and it should be clear that it’s a depression.

depression contour lines label

And this isn’t just any depression. This is the massive meteor crater that struck Arizona a long time ago.

depression contour crater

On some maps, cartographers use teeth marks or hachures for depressions at craters or volcanoes because it marks the elevation goes up or down.

Answer 2

lake. 1. (Physical Geography) an expanse of water entirely surrounded by land and unconnected to the sea except by rivers or streams.

Lake Geography. Lakes are large bodies of water that are surrounded by land and are not part of an ocean. Lakes are relatively still bodies of water when compared to a river where the water flows. They can contain either salt or fresh water and are larger than ponds.

A lake is an area filled with water, localized in a basin, that is surrounded by land, apart from any river or other outlet that serves to feed or drain the lake. ... Lakes can be contrasted with rivers or streams, which are usually flowing. Most lakes are fed and drained by rivers and streams.