Zoning of karstic aquifer protection on Tange-Konara Yasuj using COP method

Karstic water resources are one of the most important sources of water for the world's population, which accounts for 25-20% of the world's population; these resources are subject to increasing pressure and require special management due to the nature of the point recharges. In this research, after mapping vulnerability and zoning protection on karstic aquifer of Tange-Konara Yasuj using COP method, proposed restrictions was presented. At first, the geological and topographic maps of the area to transfer to GIS software were digitized. In order to provide data, maps, and information about the situation of karstification, soil, and vegetation field surveys was conducted multiple times. Then, the operations and mathematical calculations to mapping of factors and sub-factors considered in COP method, was conducted in GIS media. The results show that karstic aquifer vulnerability rate changes 0.6 to 4.2 which showing high to very low vulnerability for the study area; So that, high, moderate, and low vulnerability classes are on Quaternary, Asmari, and Pabdeh-Gurpi-Razak formations, with 1.6, 77.1, and 21.2 percent of the area, respectively. The importance of each of the factors in determining the sensitivity of the aquifer in the study area can be considered as P> C> O. Finally, three protection zone was considered including I for areas with high vulnerability, II for areas with medium vulnerability, and III for areas with low and very low vulnerability that was presented in the form of a protective map.