Published 2023-04-26
Keywords
- North Fars watershed,
- hydrological processes,
- morphometric analysis,
- watershed lag time;,
- multiple linear regression (MLR)
How to Cite
Copyright (c) 2023 European Journal of Geography
This work is licensed under a Creative Commons Attribution 4.0 International License.
Abstract
The North Fars watershed is one of the major sources of irrigation and drinking water
supplies for the Fars province in Iran. The major sources of water for this watershed are rain
and snow. Morphometric analysis of the study area, consisting of 14 subwatersheds (W1 to
W14), was carried out. It is found that that the entire watershed has uniform lithology and is
structurally permeable. The results show that the maximum mean bifurcation ratio (???? bm) is
seen for W5 (388.10) and thus, it will show early hydrograph peak (shorter watershed lag
times), which also indicates strong structural control on the drainage development for this
subwatershed. All the subwatersheds have low values of drainage density (D), indicating that
they are composed of permeable subsurface material, good vegetation cover and low relief.
Shape factor (Rs) is found to be minimum for W7, indicating that it has longest watershed lag
time. The ruggedness number (Rn) is minimum for W14 (0.16) and maximum for W5 (0.98).
Low values of constant channel maintenance (C) for W11 and W9 show that among all the
subwatersheds, these two are associated with the weakest or very low-resistance soils, sparse
vegetation, and mountainous terrain.