Kuma Hailu Gisha, Feyessa Fekadu Fufa, Demissie Tamene Adugna
Faculty of Civil and Environmental Engineering, Jimma Institute of Technology, Jimma University, Jimma 378, Ethiopia.
Heliyon. 2022 Mar 7;8(3):e09071. doi: 10.1016/j.heliyon.2022.e09071. eCollection 2022 Mar.
Understanding land use/cover (LULC) changes and their impacts on the catchment are imperative for proper land management. Hence, useful information concerning responses to LULC changes becomes important to minimize negative impacts on future land uses. The aim of the study was to evaluate the LULC changes and consequences of the change at Bilate catchment from 1986 to 2018. The LULC change evaluations were undertaken by using Landsat images of 1986, 2002 and 2018. Supervised image classification was employed to map the land cover classes. Informant interviews and group discussions with field observations were used to identify the consequences of the changes. Over the past periods, built-up areas, water bodies, cultivation, and barren lands have increased by 0.97, 0.13, 9.27, and 1.36%, respectively. However, the forest and grazing lands have decreased by 8.56 and 3.18% respectively. Exhaustive land cultivation without appropriate management and cultivation of sloppy lands have increased soil erosion and sediment yield to water bodies. A decline in crop yields, livestock products and numbers, and fish population in Lake Abaya are the major implications of LULC change in the catchment. Therefore, to ensure sustainable land use, responsible bodies commit and work closely with communities through participatory approaches.
了解土地利用/覆盖（LULC）变化及其对集水区的影响对于合理的土地管理至关重要。因此，有关对LULC变化的响应的有用信息对于尽量减少对未来土地利用的负面影响变得很重要。该研究的目的是评估1986年至2018年期间比拉特集水区的LULC变化及其变化后果。LULC变化评估是通过使用1986年、2002年和2018年的陆地卫星图像进行的。采用监督图像分类来绘制土地覆盖类别。通过与实地观察相结合的 informant访谈和小组讨论来确定变化的后果。在过去的时期里，建成区、水体、耕地和荒地分别增加了0.97%、0.13%、9.27%和1.36%。然而森林和牧场分别减少了8.56%和3.18%。在没有适当管理的情况下过度开垦土地以及在坡地上耕种增加了土壤侵蚀和水体的泥沙产量。作物产量、畜牧产品和数量以及阿巴亚湖鱼类种群的减少是该集水区LULC变化的主要影响。因此为了确保可持续的土地利用相关机构通过参与式方法与社区密切合作并共同努力。
