After Hamidieh Diversion Dam near the city of Hamidieh. Karkheh River is divided into two streams known as Hufel and Nissan. At the lower flow rates. Nissan makes up a greater share than Hufel due to the steeper slope of the former. https://www.roneverhart.com/Turbosound-TS-18SW700-8A-18-Low-Frequency-Loudspeaker-p31480/