Preliminary selection of the physiographical attributes was based on correlation with mean percentile Q50 and runoff ratio (RR in Table 2). The correlation analysis indicated that DA, DP, BAE, and MAB showed significant correlation with mean percentile Q50 and runoff ratio, as shown in Table 2. Therefore, these physiographical attributes were used for further analysis.

Table 2

Correlation of catchment attributes with mean percentile and runoff ratio