Assessment of forest roads and art structures in terms of flood risk with the help of GIS (A case study from Tutunculer Forest Enterprise, Artvin)

In this study conducted for the evaluation of forest road and art structures with the help of Geographical Information Systems; The existing forest roads, dry and irrigated streams and the art structures built on these roads in the area within the boundaries of OİŞ were determined and processed on the digital land model. Forest road and art structures on digital terrain model; The distribution in the rivers and dry streams, the distribution according to the land slope classes, the distribution according to the northern and southern views and their distribution according to the increase in height are examined. After the distributions on the digital terrain model were analyzed with ArcGIS software, a hydraulic flood model was developed to analyze the study areas in terms of flood. Hydraulic model study was performed by using Hec-RAS software. Using cross-section data, creek and road routes within the boundaries of our work area Tütüncüler OİŞ were defined and cross-sectional profiles were created for each region. The first step of the geometric data entry process was completed by entering the roughness manning coefficient, stable current values, flow rate and hydrological values by taking into account the topographic, rainfall and forest functions of each region. As the second step, the characteristic data of the existing art structures were entered on the sections and water surface profiles were obtained. Water surface profiles were obtained and hydraulic flood model was completed. The flood model created with the Hec-RAS software was run to determine whether the existing forest road and the art structures on it are sufficient for flood risk. As a result of flood analysis; In the first region, 18 art structures were sufficient, 8 of them were insufficient, in the second region 17 art structures were sufficient, in the third region 6 art structures were sufficient and in the fourth region, 9 art structures were sufficient and 1 of them was inadequate. In addition, suggestions were made for the re-planning of the art structures according to the formed water surface profiles