Question

GIS technology can be used to perform flood susceptibility mapping. Which of the following is/are NOT a suitable method for this?

• A. A and B Only
• B. B Only
• C. C and D Only
• D. D Only

Hint:

AHP, Logistic Regression, and Machine Learning are common methods for flood susceptibility mapping. Interpolation is only a supporting spatial estimation technique.

Answer 1

The Correct Option is B

Concept: Flood susceptibility mapping identifies areas that are more likely to be affected by floods. GIS-based methods use terrain, rainfall, drainage, land use, soil, slope, elevation, and past flood records.

Step 1: Check suitable methods.
AHP means Analytic Hierarchy Process. It is used in GIS-based multi-criteria decision analysis, so it is suitable for flood susceptibility mapping. \[ AHP = \text{Suitable} \] Logistic Regression is a statistical method used for susceptibility modelling. \[ \text{Logistic Regression} = \text{Suitable} \] Machine Learning algorithms are also widely used for flood susceptibility mapping. \[ \text{Machine Learning} = \text{Suitable} \]

Step 2: Identify the unsuitable method.
Interpolation is mainly used to estimate unknown values between known points, such as rainfall or elevation values. It is not by itself a complete flood susceptibility mapping method. \[ \text{Interpolation alone} \neq \text{Flood susceptibility model} \] Therefore, the method not suitable as a complete method for this purpose is Interpolation.