Mohsen Farzin; Aliakbar Nazari Samani; saeideh menbari; sadat feiznia; gholamabbas kazemi
Abstract
This research tries to show the role and importance of karst formations in the infiltration of surface flows and recharge of groundwater resources in the region by determining the lineaments of geological formations in watersheds leading to the Persian Gulf and explaining the relative contribution of ...
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This research tries to show the role and importance of karst formations in the infiltration of surface flows and recharge of groundwater resources in the region by determining the lineaments of geological formations in watersheds leading to the Persian Gulf and explaining the relative contribution of each formation. For this purpose, The closest sub-basins to the Persian Gulf from the four basins of the rivers including Mond, Helleh, Kol-Mehran and Zohreh, to extract the lineaments, draw rose diagram and analyze them using ENVI® 5.3 software, PCI Geomatica, GIS10.3.1 and Rock works 2016 was selected. Initially, the frequency, density, intersection, direction, size and intensity of the lineaments in the formations of the region were determined. Then, by explaining and defining the lineament index, the importance and impact of each formation in the potential recharge of groundwater resources were determined. The results show that the highest percentage of frequency, intersection percentage and length of lineament are attributed to Asmari-Jahrom Formation and the highest percentage of Lineament intensity to Ilam-Sarvak Formation; the numerical value of the lineament intensity in the karst formations is three times as non-karstic formations. In general, the investigation of the condition of the lineament shows that the lineaments are basically created in the karst formations, so that the numerical value of the lineament index in the karst formations is 72.7, while the value in the non-karstic formations is 2.3. Furthermore, orientation of lineaments according to their frequency and length, in the whole range of study,
Mohsen Farzin; saeideh menbari
Abstract
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 ...
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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.
