Figure A11.22 is a portion of the Lake Scott 7.5-minute quadrangle, Kansas, that

Question

Figure A11.22 is a portion of the Lake Scott 7.5-minute quadrangle, Kansas, that is centered around latitude 38.7 N, longitude 100.95 W. This area is an ancient upland surface that slopes gently eastward from an elevation of about 5500 feet along the Rocky Mountains to about 2000 feet above sea level in western Kansas. Streams in western Kansas drain eastward and cut channels into the ancient upland surface. Small tributary streams merge to form larger streams that eventually flow into the Mississippi River

Explanation / Answer

Contour interval is 10 meters as given in the feet.

E's contour is 3050 feets(contour lines are made by joining points having similar elevations or depressions, in this question we are having elevations)

F's contour is 3020 feets( since contour level of E is 3050 and between F and E there is an interval of 2 contour level and values of contours are decreasing while going in north of E)

If we'll see the scale then the distance between E and F is 4000 feets.

Gradient between points E and F= (Elevation difference between A and B)/ (Distance between point A and B)

Gradient between points E and F= (3050-3020)/4000

Gradient between points E and F= 30/4000

Gradient between points E and F=7.5x10-3 and in the direction from E to F i.e. sloping downwards from E towards F(As E is at high elevation).

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