Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/27495
Title: DERIVED SURGING RATE OF SHISHPER GLACIER USING GIS (GEOGRAPHIC INFORMATION SYSTEM) AND REMOTE SENSING
Authors: RAFIA IQBAL
Keywords: Earth Sciences
Issue Date: 2022
Publisher: Quaid I Azam university Islamabad
Abstract: Glaciers are surging in Pakistan due to climate change and their intercept with their own water makes dammed lake. Continous periods of surging triggers GLOF event, and damages the infrasutructure.The aim of this study is to measure the velocity of glacier surge and making estimation of future possibilities of GLOF and shortening their effecs.Glacial lakes range greatly in size having large storage of water and their quick discharge will be higher magnitude of flood causing havoc and destruction hundreds or thousands of kilometres down the line. To describe this phenomenon, we use the phrase "glacial lake outburst flooding" (GLOF). The lake that formed as a result of the Shishper glacier surge is being closely monitored by the PMD's Hydrology Group in Hassanabad, Hunza, Gilgit-Baltistan. An expanding glacier dominates the Karakoram Mountains. There is a risk of flooding due to a phenomenon known as a "glacial lake outburst" when a surging glacier dams a lake with its own water or the water of another glacier (GLOF). Potentially hundreds of kilometres of downstream infrastructure might be impacted if GLOF releases the lake's millions of cubic metres of water. The Shishper glacier near Hassanabad, Hunza, is a rapidly expanding glacier that is intercepting glacier-meltwater from the Muchuhur glacier, hence accelerating the construction of a glacial lake that poses a threat to GLOF in the coming months. On June 23, 2019,GLOF event occurred when a lake that had been dammed by the Shishperglacier burst its banks with a peak discharge of 5000 cusecs, causing erosion damage to two locations along the Karakoram Highway (KKH) not far from Hassanabad and forcing the temporary suspension of road traffic. By analysing sentinel-2 images from 2021 and 2022 using arcgis and remote sensing, and STRM digital elevation model of previous years the rate at which the shishper glacier will surge can be calculated. Based on findings of the maximum velocity (50 metres per day and 45 metres per day respectively) in the years 2021 and 2022, it can be concluded that the lake will burst out in the years 2023 and 2024. This demonstrates that the lake is once again forming as a result of the active surge of Shishper glacier, which is intercepting meltwater from a neighbouring glacier. There is currently a greater volume of water being stored in the lake, as the area of the lake has increased than it was before the flood. An impending GLOF is predicted to have a large peak discharge.
URI: http://hdl.handle.net/123456789/27495
Appears in Collections:M.Phil

Files in This Item:
File Description SizeFormat 
EAR 2008.pdfEAR 20083.92 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.