Mehrnoosh Ghadimi; sasan zangenetabar
Abstract
One important approach in the management of karst water resources is mapping of karstic aquifers. Vulnerability mapping enables identification of the groundwater resources that are subjected to contamination. The Gilangharb karst aquifer as part of the folded Zagros zone feeds the Gilangharb karstic ...
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One important approach in the management of karst water resources is mapping of karstic aquifers. Vulnerability mapping enables identification of the groundwater resources that are subjected to contamination. The Gilangharb karst aquifer as part of the folded Zagros zone feeds the Gilangharb karstic aquifer. Field visits and examination of chemical properties of the Gilangharb spring all confirm the karstic nature of the study area. In this study, in order to evaluate the vulnerability of the Gilangharb karstic aquifer, the EPIK method consisting of four layers of E (epikarst), P (protective coating), I (penetration) and K (karst network) and also the KDI method based on land use were employed. The former method is one of the inherent vulnerability methods developed especially for the karst areas based on different weight and ranking parameters. After executing the model and preparing the vulnerability map, the EPIK index was calculated between 12 and 26. The spatial distribution of the final vulnerability map classes from the EPIK model shows that 14.24, 14.56, 47.17 and 24.03% of the study area, is located in the low, medium, high and very high vulnerability zones, respectively. According to this map, about 71% of the study area shows high and very high vulnerability indicating high vulnerability of this aquifer. According to the results of the KDI method, 7.54%, 9.49%, 2.9%, 77.89% and 2.18% of the study area had high, medium, low, very low and intact, respectively that shows low vulnerability of the Gilangharb karstic aquifer.
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,
ali dastranj; ahmad nohegar; Arash Malekian
Abstract
Abstract Feeding areas, and the spatial distribution of recharge in karstic aquifers, depends to factors such as geomorphology karst and its development, climate, slope, vegetation, soil and geological factors. Karstic aquifers in the study area, has the main role in the development of human civilization ...
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Abstract Feeding areas, and the spatial distribution of recharge in karstic aquifers, depends to factors such as geomorphology karst and its development, climate, slope, vegetation, soil and geological factors. Karstic aquifers in the study area, has the main role in the development of human civilization and supply water to communities. The purpose of this research is modeling the aquifer feeding areas Azhvan-Bisotun in Kermanshah province using KARSTLOP model. The results feed zoning show that the annual charge Bisotun karst aquifer obtained for between 36 to 83 percent. The greatest amount of recharge in areas with more than 78% charged, is accordance sinkholes and the recharge rate of 36 to 40% and 40% to 45% occur in alluvial plains. Bisotun geomorphology karst mountains represent a major role in the spatial distribution of values in the aquifer is recharged.
