Effect of Land use Land Cover Change on River Flow and Sediment Yield: A Case Study of ABAY Watershed, DABUS Sub-Basin, Ethiopia
- Author Fikereselise Akalu
- DOI https://ww
- Country : Ethiopia
- Subject : Civil Engineering
Keywords : LULC, SWAT, ERDAS Imagine 2015, Dabus watershed
Abstract
Dabus watershed is facing high erosion rates due to intense rainfall storms, aggravated by the land use land cover change. A significant land use change has been observed in the Dabus watershed. The main objective of this study was to estimate the potential impacts of the land use land cover (LULC) dynamics on hydrological response (stream flow and sediment yield). The land use land spread change examinations were performed using ERDAS Imagine 2015 that was used for further assessment of SWAT. The recreation and affectability examination for each land use was finished by separating the catchment in to 49 sub-watershed and allocating HRUs dependent on different HRU definition. After an affectability investigation, adjustment and approval of SWAT model, the effect of LULC elements on hydrological reaction were assessed with three situations (1986 LULC, 2019 LULC and 2029 LULC). In the Dabus watershed, land spread change beneficially affected displayed watershed reaction because of the change from timberland land to agribusiness land and bush land to developed zone. Reproduction results for the Dabus watershed indicates that becoming developed and developed territories caused in expanded yearly and regular stream and dregs yield in volumes. The mean annual stream flow was increased by 9.02% (129.20–137.74 m3/s) and the impact on sediment yield amounts to an increase of 25.39% (23.54–45.18 t/ha/yr) due to LULC dynamic forces. The hydrological response was more sensitive to LULC dynamics for the months of Jun to September than others in the year. These outcomes exhibit the convenience of incorporating remote detecting and appropriated hydrologic models using GIS for evaluating watershed conditions and the overall effects of land spread changes on hydrologic reaction in a ceaseless way.
Comments
No have any comment !