International Journal of Innovations in Science & Technology
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Dam Site Identification Using Remote Sensing and GIS (A case study Diamer Basha Dam Site)
Full text linkSelection of suitable sites for construction of dam is the most important phase because a number of factors are required to consider that include topography, geology, tectonic settlements and the slope. We selected Diamer Basha dam site to analyze it feasibility considering real-time field data. Geologically the study site is a part of Chilas Mafic Igneous Complex which is not ophiolite. Matic complex is a block which is 40km in depth and 300km in length. These rocks are comparatively hard in nature and are considered good for construction of dam. Tectonically, we observed that the area under investigation was highly active tectonically. Surface deformation rates of the study site are highest throughout the world because this area is comprised of multiple fault lines that include Main Mantle Thurst (MMT), Main Karakoram Thrurst (MKT), Main Boundary Thurst (MBT) and many others. This area has become a hot cake for the geologist worldwide due to it’s very high surface deformation rates.Tectonically active regions are considered worst for construction sites, e.g., for dam sites. The dam site is actcually laying on the MKT which is not favorable for construction of Diamir Basha dam. A low-level earthquake may generate small cracks in concrete structure and any leakage of water may produce big holes with passage of time which are not remidable. A big level earthquake may vanish the dam site completely. Therefore, the current site is not favorable for construction of dam.
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Computation of Temporal Decline to a Vanished Island (A Case Study Zalzala Koh)
Full text linkA massive tremor stuck Baluchistan Pakistan on September 24, 2013 with a magnitude of 7.7 recorded on Richter scale. The epicenter was Awaran Baluchistan which directly affected about 300,000 people leaving about 386 causalities. The impact of this earthquake was so much large that it created a new landmass which was named as Zalzala Koh later. It was the result of strike slip faulting at a depth of 15km. The new born island was full of rich minerals, gases and dead sea animals. This island was 60 feet high, 100 feet wide and 250 feet long. The classification results of Landsat 8 show that the island completely disappeared in 2019 after 6 six years of its birth. First the volume of this island decreases due to reduced pressure of internal gases and secondly, the high-pressure water waves vanished it completely. Satellite imagery proved efficient for spatio-temporal monitoring of various landuse classes.
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Remote Sensing and Morphotectonic Analysis in Hazara Kashmir Syntaxis Using River Longitudinal Profiles
No full textThe earthquake of Hazara Kashmir Syntaxis (HKS) occurred in Himalayan zone on October 8, 2005. This incidence occurred as a consequence of advanced dispersion of neotectonics of North West edge of subducting Indo-Pak plate located below Eurasia. The objective of this study is to monitor actively deforming neotectonics using SRTM DEM 90 m based automatic drainage network and geomorphometry. Active neotectonics analysis relies on geomorphic indices for instance concavity, steepness, rate maps of relative uplift and Hack-SL gradient. The topographic relative uplift rates (TRUR), steepness, concavity indices and Hack SL provide accurate results for active tectonics of HKS. The topographic relative uplift rates (TRUR ) are relatively high in the central region, north to northwest, north to northeast, and south to southwest which are nearly 2. 5 mm per year. But it is lower i.e., 0.1 mm per year within the eastern region of Hazara Kashmir Syntaxis. Steep slopes and steepened regions are located along NNW and in the east of HKS which are symptomatic representation of neotectonics activity within HKS. Thus shows the effect of neotectonics over the topography and drainage networks of the area under study. TRUR maps indicate more deformation of study area in central, NNE, NNW and SSW parts than the east towards Sri Nagar.
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