The ecological features of the 2nd mountain ranges follow along the route in various latitudes, 8 to 15 meters and depths of 1 to 2 meters, at the end it flows into the salt lake located near the city of Qom. Average water of the Karaj River is 17 cubic meters per second, which is lower in summer and autumn, reaching its peak in winter and early spring.
Chondro, Chondroat, Nimrk Valley - Valley, English Valley (Vine), Valley of the Adolescents, Rashkh Paradise, Shah Robat, Khord, Sijan, Charan, Sarsiard, Gurab, Argenh, Seven Springs, Adrian-Douran, Khuznkula, Ozer, Nashtarod-Hellas Varyan, Gesarehra (Rossakan), Morud, Wesal-Darreh, Shlanke, Sark, Laniz, Shahr-e-Kark, Kalarood-Gashtdar-Chazil, Garmab, Azadbar-Mill, Port of Sarensa, Velayedrud-Dizin, Paysayad, Shirkamar-Sottak and Varang Rood, The most important streams of this torrid river make up.
The most important springs of Karaj protected river are Sothek, White Sothek, Shirkamar, Sikno, Karim Chal-Varangrood, Nimrk, Jian-Kondur, Chahshan-e-Saran, Shahi Khoreh, Seven Springs, Cheshmeh Valley , Qasr Nasr al-Din Shah-Shahr-e-Shahrkhk, Basal-Shahr-e-Kark Valley, Bidar Cheshmeh Baghestan and Payyad Sayyed.
Now, on the one hand, due to the establishment of service units, agricultural lands and rural residential centers, the entrance of various urban and agricultural wastewater and the threat of habitat and, on the other hand, due to the wide scope of the area of protection and scope of the area of operation, and the shortage of manpower and facilities that lack access to vehicles The right vehicle is at the top of all of them, despite the overnight effort of environmentalists through unauthorized fishing, a significant decline in populations of some of these species has been observed.