RESUMEN
In order to determine the potential productivity of cold water fishes in springs with more than 100 lit/sec of water in the province of Chaharmahal Bakhtiari, the province area was divided into following four districts, Ardal, Broujen, Farsan and Lordegan. In this study water resources [springs] have been identified, and some parameters like air and water temperature, type of substrates and water out-flow was measured. Macrobenthic organisems have been collected, sieved and fixed in the 250 ml glass bottel with 4% formalin, labled and transported to the laboratory. In the laboratory the samples were washed thourly and different organisms were identified and counted separately. In reference to this survey which is the results of 45 springs information in this area, there are not any constrain for propagetting and culturing of cold water fishes, mainly rainbow trout, onchorhynchus mykiss. In the whole region there are about 45140 lit/sec water out-flow. Among all of the sampled macrobenthos organisems, Genous Gammarus, Baetis and Simulium were the dominant invertebrate animals. According to quality characterization of the water resources the production of 85 Kg/fish/y is purposed, therefore it could annually produce 3800 tons of fish, using spring waters of this province