The Effects of Structural Geomorphology Features on Drainage System in Sinankoy (Lalapasa-Edirne) and Its Surroundings

Abstract

The main aim of this study is to determinate structural geomorphology features and research their effects on the drainage system. Firstly, 1/25.000 scale topographic map and 1/100.000 scale geological map were digitized on the Geographical Information Systems platform and a digital database was created. Structural features were examined; morphometric analyzes, lineament analyze and hydrological analyses were performed. In the field works; verification and correction of the GIS-based analyze results, measurements of structural features, photographing and mapping studies have been carried out. According to GIS-based analyze and measurement results; geological formations general strike is northwest-southeast, prevalent dip direction is southwest and dip angle values varying between 5-30 degrees. Morphometric analyze results and field measurements, clearly defined the monoclinal structure geomorphology. It has been seen that "consequent" and "resequent "streams flow through northeast-southwest, parallel to the monoclinal structures' natural slope direction, while "obsequent" and "subsequent" streams flow through west-east and northwest-southeast, deviating from the monoclinal structures natural slope direction. The evolutionary process of the drainage system has been affected by monoclinal structures' geomorphologic, lithologic and stratigraphic characteristics. This influence also has controlled the exhumation of the subjacent structure, made the monoclinal structure landforms more evident. As a result of these processes, the drainage system gained a "trellis (orthogonal)" pattern that is compatible with the structure.