Document Type : Original Article
Authors
1
Professor, Department of Geography Shahid Bahonar University of Kerman, Kerman, Iran
2
M.A Student, Department of Geography Shahid Bahonar University of Kerman, Kerman, Iran
10.22034/hyd.2025.68487.1807
Abstract
Morphometric parameters, while describing the physical characteristics of a watershed, also control quantitative flood parameters such as discharge, time of occurrence, time of concentration, lag time, and flood hydrograph. For this reason, morphometric analysis is considered a low-cost, fast, and reliable method for flood assessment. This study aims to evaluate the flood susceptibility potential of various sub-watersheds in the Tanguieh basin using morphometric parameters and statistical models. After delineating the sub-watersheds, fifteen morphometric parameters were calculated for each one, and the relationships between these parameters and their influence weights were determined using the Pearson correlation test and Weighted Sum Analysis (WSA). Subsequently, the Sub-watershed Prioritization Index (SWPI) was calculated using the Weighted Linear Combination (WLC) method to prioritize the sub-watersheds for watershed management and flood control operations. Finally, analysis of variance (ANOVA) and statistical mean comparison tests, including Duncan’s test, were employed for grouping the sub-watersheds. The results indicated that based on the SWPI index, sub-watershed No. 1 (724.31) ranked first, followed by No. 2 (617.8) and No. 3 (570.196) in flood control priority. Additionally, according to the coefficient of variation (CV), sub-watershed No. 1, with an average score of 2.13, exhibited the highest flood susceptibility potential, followed by sub-watershed No. 3 (2.07) and sub-watershed No. 2 (1.8). However, Duncan’s mean comparison test revealed that although morphometric evaluations appeared to differentiate the sub-watersheds, there was no statistically significant difference among the three, placing them all in the same group.
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