The shape of the basin is quantitatively measured by various factors such as the i. form factor ii. circularity ratio iii. elongation ratio iv. compactness coefficient
- AOnly (i)
- BOnly (i) and (ii)
- COnly (iii) and (iv)
- D(i), (ii), (iii) and (iv)Correct
Solution
Concept
Factors measuring shape of a basin
Formula
NONE
Step-by-step solution
1. Quantitative measures of basin shape include parameters like form factor, circularity ratio, elongation ratio, and compactness coefficient. Answer: D
Explanation
Basin shape influences streamflow response and is quantitatively evaluated using several dimensionless parameters. These parameters include the form factor, circularity ratio, elongation ratio, and compactness coefficient. Therefore, all four listed factors are valid quantitative measures of basin shape, making option D correct.
Why the other options are wrong
B) Circularity ratio is omitted as the sole additional factor in this choice. C) Form factor and circularity ratio are omitted from this selection.
Shortcut
Basin shape parameters include form factor, circularity ratio, elongation ratio, and compactness coefficient (all 4 are correct).
Common mistake
Selecting option A, B, or C by excluding one or more valid morphometric factors that quantitatively describe basin shape.
Correct answer: D) (i), (ii), (iii) and (iv)