Authors: Amer Masood, Syed Amer Mahmood, Sadaf Sharif and Jahanzeb Qureshi
Abstract: This investigation is about the demarcation of neotectonics on the DEM based non-linear and vertical dissection in the northern Pakistan. This research computes fractal dimension (FD), lacunarity (LA) and succolarity (SA) or 3-Fractals, based on the Box Counting method and Gliding Box Technique (GBM and GBT) approaches. The purpose is to show that the 3-fractals can be used as a new feature in the spatial pattern recognition procedure, particularly for demarcation and investigation of natural textures (e.g., drainage patterns). We also examined the vertical dissection such as plane area, surface area and their surface ratio using SRTM DEM with a spatial resolution of 90 meters. The aim is to make a vertical dissection map and to recognize areas with more surface roughness (SR) affected by active tectonics. Low SR values designate comparatively flattened watersheds with transitional slope inclinity, various aspects and vice versa. Higher SR values are associated NE- SW in the study Area and along the Raikot Fault. The SR map is proficient enough to identify extremely notched valleys, relative localized uplifts and depressions. The non-linear analysis is an influential and handy tool to demarcate vulnerable zones of stark surface deformation and inconsistencies in the spatial drainage network affected by the active tectonics. Both non-linear and SR investigations propose mostly a neotectonic controlled topographic development of Gilgit-Baltistan.
Keywords: Fractal Dimension, Lacunarity, Succolarity, surface roughness, SRTM DEM