تحلیل ژئومورفولوژیک با استفاده از تئوری گسیختگی سطحی، منطقه مورد مطالعه: کپه داغ مرکزی و شرقی (مقاله علمی وزارت علوم)
درجه علمی: نشریه علمی (وزارت علوم)
آرشیو
چکیده
منطقه کپه داغ، یک ناحیه فعال تکتونیکی در شمال شرق ایران، چشم اندازی منحصر به فرد برای مطالعه پتانسیل گسیختگی سطحی و فرآیندهای هیدروژئومورفولوژیکی ارائه می دهد. این مطالعه با استفاده از تکنیک های پیشرفته تحلیل ژئومورفومتری به بررسی تعامل پیچیده بین توپوگرافی، تکتونیک و فرآیندهای سطحی در این محیط نیمه خشک می پردازد. با بهره گیری از مدل های رقومی ارتفاعی (DEM) با وضوح بالا، پارامترهای کلیدی ژئومورفومتری از جمله ارتفاع، شیب و جهت شیب را استخراج و تحلیل می کنیم تا ویژگی های توپوگرافی منطقه و پیامدهای آن برای گسیختگی سطحی و مدیریت منابع آب را مشخص کنیم. در این روش شناسی ما به دنبال پردازش DEM، تحلیل های آماری و تکنیک های تجسم سازی با ادغام آنها و استفاده از اسکریپت های پایتون می باشیم. ما از روش های نمونه برداری کاهشی برای پردازش کارآمد مجموعه داده های بزرگ با حفظ یکپارچگی داده ها استفاده می کنیم و معیارهای آماری قوی را برای کمی سازی عدم قطعیت در یافته هایمان به کار می بریم. منطقه مورد مطالعه، با پوشش تقریبی 35,595 کیلومتر مربع، دامنه ارتفاعی 2,608 متری را از 354 تا 2,962 متر بالاتر از سطح دریا نشان می دهد.وجود شیب های بسیار تند (تا 89.60°) نشان دهنده مناطقی با پتانسیل ناپایداری و خطر فرسایش بالا است که احتمالاً با فعالیت تکتونیکی اخیر یا رویدادهای گسیختگی سطحی مرتبط است. جهت شیب غالب به سمت حدود جنوب، بینش هایی درباره کنترل های ساختاری بر توپوگرافی و الگوهای بالقوه گسیختگی سطحی ارائه می دهد. ترکیب تکنیک های پیشرفته ژئوسپیشیال(مکانی-فضایی) با تحلیل ژئومورفولوژیکی، رویکردی نوآورانه برای مطالعه مناطق فعال تکتونیکی ارائه می دهد که کاربردهای بالقوه ای در محیط های مشابه در سراسر جهان دارد. لذا با عنایت به درک صحیح از ژئومورفولوژی و چارچوب های روش شناختی پیشنهاد می شود که با رویکردهای پژوهشی نوین گامی در جهت شناخت سیستمی، برنامه ریزی منطقه ای، کاهش خطر و مدیریت منابع آب در این منطقه پیچیده زمین شناختی و حساس زیست محیطی برداشته شود.Geomorphological Analysis Utilizing Surfacein interrupture Theory: The Central and Eastern Kopeh Dagh Region
The Kopet Dagh region, a tectonically active area in northeastern Iran, presents a unique landscape for studying surface rupture potential and hydrogeomorphological processes. This study employs advanced geomorphometric analysis techniques to investigate the complex interplay between topography, tectonics, and surface processes in this semi-arid environment. Utilizing high-resolution Digital Elevation Models (DEMs), we derive and analyze key geomorphometric parameters, including elevation, slope, and aspect, to characterize the region's topographic features and their implications for surface rupture and water resource management. Our methodology integrates custom Python scripts for DEM processing, statistical analyses, and visualization techniques. We employ downsampling methods to efficiently process large datasets while maintaining data integrity, and apply robust statistical measures to quantify uncertainty in our findings. The study area, covering approximately 35,595 square kilometers, exhibits an elevation range of 2,608 meters, from 354 to 2,962 meters above sea level. Results reveal a diverse landscape with a mean elevation of 1,365.97 meters and a mean slope of 4.88° ± 0.01° (SEM). The presence of very steep slopes (up to 89.60°) suggests areas of potential instability and high erosion risk, possibly associated with recent tectonic activity or surface rupture events. The predominant east-northeast facing slope orientation (mean aspect 71.13° ± 0.03° SEM) provides insights into structural controls on topography and potential surface rupture patterns. This study contributes to the field by providing a comprehensive geomorphometric characterization of the Kopet Dagh region, offering valuable insights for seismic hazard assessment, land-use planning, and water resource management. The integration of advanced geospatial techniques with geomorphological analysis presents an innovative approach to studying tectonically active regions, with potential applications to similar environments worldwide.The Kopet Dagh region, characterized by its complex geological formations and dynamic hydrogeomorphological processes, presents a unique opportunity for analyzing surface interruptions and their implications on landscape evolution. This study employs advanced computational techniques to analyze Digital Elevation Models (DEMs) and derive critical geomorphometric parameters that inform our understanding of surface interruption phenomena. Our research aims to integrate terrain analysis with hydrogeomorphological assessments, focusing on the identification of potential fault lines and the evaluation of terrain metrics such as slope and aspect. The methodologies utilized herein are based on robust algorithms that process DEM data to extract meaningful geological insights. By examining surface interruptions in the Kopet Dagh region, we seek to elucidate the relationships between topography, geological structures, and hydrological processes. This approach not only enhances our comprehension of the region's geomorphological evolution but also provides valuable insights into potential geological hazards and their impacts on water resources. The study leverages high-resolution DEMs and applies a series of geospatial analyses to quantify and visualize terrain characteristics. These analyses include the calculation of slope gradients, aspect orientations, and curvature metrics, all of which are crucial for identifying areas prone to surface interruptions. Through this research, we aim to contribute to the broader understanding of geomorphological processes in tectonically active regions and demonstrate the utility of surface interruption theory in interpreting landscape features. The findings of this study have implications for land-use planning, water resource management, and natural hazard assessment in the Kopet Dagh region and similar geological settings worldwide. Methodology The analysis is executed through a series of well-defined steps using Python programming, specifically leveraging libraries such as rasterio, numpy, matplotlib, and scipy. The following sections outline the key components of the methodology: 1. Data Acquisition: - The study utilizes Digital Elevation Model (DEM) data sourced from the Kopet Dagh region. The DEM is crucial for calculating terrain metrics that are indicative of surface stability and potential interruption zones. 2. Terrain Metrics Calculation: - The program employs a function (calculate_terrain_metrics) to compute essential geomorphometric parameters: - Slope: Calculated using numerical gradients, providing insights into terrain steepness. - Aspect: Derived from slope calculations, indicating the direction of maximum slope. - Curvature: Analyzed using second derivatives to understand surface shape. - Topographic Position Index (TPI) and Terrain Ruggedness Index (TRI): These metrics assess local elevation variations and landscape complexity. 3. Surface Interruption Identification: - The function identify_potential_faults integrates calculated terrain metrics to identify areas prone to surface interruption. This function employs edge detection algorithms (Canny) and morphological operations (skeletonization) to enhance interruption identification. - A combined metric is derived through weighted normalization, emphasizing slope, curvature, TPI, TRI, and entropy. 4. Processing in Tiles: - To manage large datasets effectively, the program processes the DEM in tiles, optimizing memory usage while ensuring comprehensive coverage across the study area. 5. Output Generation: - The results are saved as GeoTIFF files (potential_interruptions.tif and combined_metric.tif), which can be further analyzed using GIS software. - Visualization of results is achieved through matplotlib, producing informative plots that illustrate potential interruption locations and terrain metrics. This methodology provides a robust framework for analyzing the geomorphology of the Kopet Dagh region using surface interruption theory, enabling a comprehensive assessment of the landscape's characteristics and potential geological hazards.
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