Water flow is perpendicular to contour lines as a basic rule of thumb. Water always flows perpendicular to the contour lines and downhill. As one moves upstream, the contour lines become higher and higher, first paralleling then crossing the stream.
About contour map:
- A contour line for a two-variable function is a curve that unites points of equal value and has a constant value for the function.
- It's a plane segment of the three-dimensional graph of the function that's parallel to the plane.
- A contour line (often referred to as a "contour") in cartography connects points of equal elevation (height) above a particular level, such as mean sea level.
For more information about the contour map refer to the link:
https://brainly.com/question/18996280
