Residents fear the plan to divert more than a billion cubic metres of water will dry out the river and severely affect farming.
The latest human chain protest was held on Thursday with thousands of residents taking part in the protest along Karoon River.
According to the regime’s plan, 1200 million cubic meters of water from Karoon will be diverted to the central provinces. This plan will sharply reduce the water of rivers leading to Khuzestan plain and the Persian Gulf.
Many of those arrested for organizing the human chain protests were taken to unknown locations.
Also, at least 11 protesters in the city of Tabriz were also arrested for demonstrating to save the Orumiyeh River from having water diverted by the regime.