• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Regional Environmental Change >Future soil loss in highland Ethiopia under changing climate and land use
【24h】

Future soil loss in highland Ethiopia under changing climate and land use

机译：改变气候和土地利用下的高地埃塞俄比亚未来土壤损失

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Soil erosion caused by climate and land-use changes is one of the biggest environmental challenges in highland Ethiopia. The aim of this study was to assess the future soil erosion risks and evaluate the potential conservation measures in the Rib watershed, northwestern highland Ethiopia. We used the HadGEM2-ES model with a moderate greenhouse gas (GHG) concentration scenario (RCP4.5) to project the future climate. The future land-use patterns were predicted using the CA-Markov model. We integrated the RUSLE model with GIS to estimate the spatial distribution of soil loss and identify erosion risk areas. We found that the Rib watershed is highly vulnerable to future climate and land-use changes, leading to a high soil erosion risk. Despite slight growth of forest cover during the study period, the total soil loss for the watershed was estimated to be 7.93 x 10(6) t year(-1) in 2017 and was predicted to increase to 9.75 x 10(6) t year(-1) in 2050, an increase of about 23%. The increase in forest cover was due to the expansion of the area of eucalyptus plantations which are more prone to erosion. Moreover, field survey showed that the residual native forests are sparsely vegetated and mostly used for cattle grazing, increasing the erosion risk even more. In contrast, the combined use of afforestation with native trees and physical soil conservation measures in the upper areas of the catchment could decrease soil loss by 62%. Our results stress the importance of combining soil conservation measures, including converting eucalyptus plantations to native forests, to mitigate the effects of future climate change and increased agricultural production on soil erosion.
机译：气候和土地利用变化引起的土壤侵蚀是高地埃塞俄比亚的最大环境挑战之一。本研究的目的是评估未来的土壤侵蚀风险，并评估肋骨流域，西北部高地埃塞俄比亚的潜在保护措施。我们使用了带有温和的温室气体（GHG）集中情景（RCP4.5）的Hadgem2-es模型来预测未来的气候。使用CA-Markov模型预测未来的土地使用模式。我们将风险模型与GIS集成，以估算土壤损失的空间分布，识别侵蚀风险区域。我们发现，肋条流域非常容易受到未来的气候和土地利用变化的影响，导致土壤侵蚀风险高。尽管在研究期间森林覆盖率略有增长，但分水岭的总土壤损失估计是2017年的7.93 x 10（6）吨（-1），预计将增加至9.75 x 10（6）吨（-1）2050年，增加约23％。森林覆盖的增加是由于桉树种植园地区的扩张，这些种植园更容易侵蚀。此外，现场调查显示残留的原生森林稀疏植被，主要用于放牧，增加侵蚀风险。相比之下，在集水区的上部区域的植入与原生树木和物理土壤养护措施的结合使用可能会降低土壤损失62％。我们的结果强调了将土壤保护措施结合在内的土壤保护措施，包括将桉树种植园转化为原生林，以减轻未来气候变化的影响，增加农业生产对土壤侵蚀。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号