埃塞俄比亚西北部Kafta-Sheraro国家公园土地利用和土地覆盖动态:模式、原因和管理启示

IF 0.3 Q4 MULTIDISCIPLINARY SCIENCES Momona Ethiopian Journal of Science Pub Date : 2019-10-29 DOI:10.4314/mejs.v11i2.5
A. Zenebe, A. Addisu
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引用次数: 1

摘要

Kafta-Sheraro国家公园(KSNP)是埃塞俄比亚最重要的保护区之一,为当地人民提供了许多重要的生态和水文效益。然而,由于2003年政府发起的自愿重新安置计划导致人口迅速增加,公园面临着巨大的压力。利用2003年、2009年和2015年拍摄的卫星图像,本研究检查了整个公园在12年期间(2003年至2015年)土地利用/覆盖的变化模式,在此期间,已知人口压力随着时间的推移而增加,政府政策也发生了变化。结果表明:在12年的研究期间,林地变化最大,覆盖面积减少862.3 km2(即从2003年占公园总面积的77.8%减少到2015年的38.0%),年减少率为79.3 km2。相反,其他土地覆被类型均呈增加趋势,其中灌木林和农用地的年增长率分别为44.96和18.90 km 2。总体而言,除草地外,所有土地利用和土地覆盖类型的土地覆被变化速率在第一期(2003 - 2009年)高于第二期(2009 - 2015年),表明人类活动的影响在2003年实施移民安置计划后更高,在2007年建立公园后有所减缓。导致该地区土地覆被变化的主要原因是定居和人口扩张、耕作、火灾、采矿和放牧。我们建议建立更有效的公园保护系统,以减轻和恢复栖息地。
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Dynamics of Land Use and Land Cover in the Kafta-Sheraro National Park, NW Ethiopia: Patterns, Causes and Management Implications
Kafta-Sheraro National Park (KSNP) is one of the most important protected areas in Ethiopia and provides a number of important ecological and hydrological benefits to the local people. However, the park is under immense pressure as a result of a rapidly increasing human population that resulted from a voluntary resettlement program launched by the government in 2003. Using satellite imageries taken in the years 2003, 2009 and 2015, this study examined patterns of changes in land use/cover throughout the park over a 12 year period (2003 to 2015), during which human population pressure is known to have increased over time and changes in government policies were taken place. The results showed that, over the period of 12 years, wood land experienced the most changeover the study period, with a loss of cover of 862.3 km 2 (i.e. from 77.8% coverage of the total park area in 2003 to 38.0% in 2015) at annual rate of 79.3 km 2 ). Conversely, the other land cover types showed increasing pattern, particularly, bush land and agricultural land were increasing at a rate of 44.96 and 18.90 km 2 per year, respectively. Overall, the rate of land cover change was higher during the first period (2003 to 2009) compared with the second period (2009 to 2015) for all land use and land cover types, except grass land, suggesting that human impacts were higher following the resettlement program in 2003 and then slowed down following establishment of the park in 2007. The major causes of land cover change in the area were settlement and population expansion, cultivation, fire, mining and grazing. We suggest that better effective park protection systems should be in place to mitigate and restore habitats.
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来源期刊
Momona Ethiopian Journal of Science
Momona Ethiopian Journal of Science MULTIDISCIPLINARY SCIENCES-
自引率
0.00%
发文量
13
审稿时长
12 weeks
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