Refer to blocks D3 and E3 - NSC Geography - Question 2 - 2017 - Paper 2

To calculate the horizontal equivalent (HE):

1. The horizontal equivalent is determined using the formula:

   $HE = 1.5 ext{ cm} imes 500 ext{ m} = 750 ext{ m}$

   The measurement range for this calculation is considered as 500 m, which fits within the range of 700 to 800 m. Therefore, the horizontal equivalent (HE) is 750 m.

To calculate the gradient between M and spot height 1 395:

1. Use the gradient formula:

   $Gradient = \frac{Vertical Interval (VI)}{Horizontal Equivalent (HE)}$

   Substituting in the values calculated:

   $Gradient = \frac{105 ext{ m}}{750 ext{ m}} = 0.14$

   Thus, the average gradient is approximately 0.14.

Answer: High velocity.

Reason: The average gradient is steep, therefore the water will flow faster. A steeper slope indicates that over a short distance, the elevation changes quickly, contributing to a higher stream velocity as observed in the gradient calculated.