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Showing 2 results for Gis.

Kazem Ali Abadi, , , , ,
Volume 2, Issue 4 (10-2014)

The purpose of this research is to identify  the structural lineaments of north mountains of Sabzevar which is known as the mountains Chaghatay and its impact on the underground water resources of the region. Lineaments are often superficial cracks in the ground and play an important role in feeding the underground aquifers. Using satellite imagery and digital elevation model (DEM) with knowledge of geology is an appropriate tool to evaluate the mining fractures that its application is extremely popular in the last decade. In this study, geological maps 1: 100000  of region and Landsat satellite imagery sensors, ETM collected in the study area and with the help of software ENVI5 and ARC / MAP after geometric corrections, by process Newton polynomial using MATLAB software have extracted  tectonic and structural lineaments. Then to communicate lineaments and the groundwater resources , with overlapping layers of hydrography such as springs, wells and surface we have observed that there is a close relationship between the lineament fault and underground water resources. Due to the lithology region is the combination of limestone and ophiolite melange and limestone radiolarites , lineaments role felt more particularly faults in underground aquifers feeding in the downstream area. most springs area is of fault type which appeared due to new tectonic movements and kept in good condition on the alluvial fan and plain water table downstream. Studies show that due to the movements of the faults in Quaternary alluvial deposits have been affected, and by alluvial fan fed  in downstream have contributed by water penetration and output it via springs and wells and other water sources. So that the total number of 183 Qanats with over 558 km of lengh, about 800 deep and semi-deep wells in the area, Its output water indebted tectonic lineaments and particular circumstances of hydrological and lithological in the upstream areas.

Aghil Madadi, Taher Hemmati,
Volume 3, Issue 5 (4-2015)

Namakabroud area is located in the city of Chalus in Mazandaran province. Due to the large limestone formations, the presence of faults and tectonic seams, this area has a high potential for karst formation. The aim of this study is zoning feature of karst formation in this region. The main data of the study include topographic maps and aerial photographs with geological and hydrologic data at the Energy Department. In this study, six factors affecting the karst formation include: Geological, distance from seams and gaps, topography, slope, rainfall and temperature is used. Then these factors using fuzzy logic model in GIS environment are analyzed. At the end of the karst formation final map was prepared using 0.7 Gamma operator. The results show the ability of the region in the karst formation, so that the total area of 221.63 square kilometers study area, 56.65 percent (123.33 km) located in zones with high karst formation. While only 17.13 percent (37.98 square kilometers) in area with karst formation is low. In the end, according to the results of fuzzy model use of these models can help significantly identify areas of karst and zoning of these areas.

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ژئوموروفولوژی کاربردی ایران Applied Geomorphology of Iran
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