Ph.D. Tezi Görüntüleme | |||||||||||||||||||||
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| Summary: In this thesis, the physical properties of soils, the hydrological and physiographic characteristics of selected model watersheds among the match watersheds were investigated taking into consideration of parent material, land use, slope and aspect. Form these findings, sediment yield was evaluated and model watershed was planned via GIS and WEPP. The effects of all parameters on dam area and also the preventive cautions for sediment transportation were determined. Dam area was separated into 5 match watershed groups regarding parent material, land use, slope, aspect and 5 model watersheds were selected to represent each group. To determine some physical and hydrological properties of model watersheds, the soil profiles were engraved taking into consideration of parent material, land use, altitude and aspect. In each soil profile, soil samples were collected from various soil depths (0-20 cm, 20-50 cm).The approximately soil loss for 5 model watersheds were determined. The amount of approximately soil loss and total soil loss in dam area were calculated as 42.16 ton/year and 1842716.11 ton/year respectively. These values showed that soil loses would cause to loss a production to be gained in 17 years. Additionally, the preventive cautions for sediment transportation and planning costs in model watersheds were determined. It was determined that use/expense proportion of project to be done was 5.28 for total dam area regarding the results from the model watershed. Because this value was higher than “1”, this project was found to be acceptable.
Key Words: Watershed Management, Geographic Information System (GIS), WEPP (Water Erosion Prediction Project), Soil Erosion, Sediment Yield, Afforest. | |||||||||||||||||||||