Table 2.

Description of groundwater zones based on dominant influencing factors in the Najafabad aquifer.

Zone	Name	Main Influential Factor	Description
Z1	River Corridor	River discharge	Influenced by proximity to river
Z2	Right Side of Nekouabad Canal	Irrigation canal (Nekouabad)	Affected by controlled irrigation system
Z3	Left Side of Nekouabad canal	Irrigation canal (Nekouabad)	Similar to Z2 but spatially distinct
Z4	Khamiran Irrigation Area	Groundwater abstraction	Affected by Khamiran irrigation scheme
Z5	Western Highlands	Precipitation and natural recharge	Mostly natural influence, limited access