Monitoring soil erosion in South Africa at a regional scale: review and recommendations
Monitoring soil erosion in South Africa at a regional scale: review and recommendations
复制标题
在区域范围内监测南非的土壤侵蚀：审查和建议
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
P. Sumner
中科院分区：
文献类型：
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作者：
J. L. Roux;T. Newby;P. Sumner
表土流失是南非农业面临的主要土壤退化问题之一，受到决策者的特别关注。为了进行有效的预防和补救，必须确定和监测问题的空间范围。最近在应用遥感和地理信息系统研究土壤侵蚀方面的发展在这方面提供了相当大的潜力。本文概述了可用于监测的关键技术，并强调了在区域范围内需要解决的问题。在南非使用的技术的状态进行了审查，并在比较的情况下，最近的研究有关土壤侵蚀。空间、时间和测量变异性是侵蚀评估的主要限制因素。以前在南非进行的侵蚀研究在区域范围内忽视了重要的侵蚀因素，并高估了不太重要的。当跨越尺度界限时，不同的过程和相互作用可能成为主导。这些考虑突出表明，需要建立一个方法框架，以指导和规范今后的区域土壤流失监测工作。
Loss of topsoil is one of the principal soil degradation problems confronting agriculture throughout South Africa and receives special attention by policy-makers. For effective prevention and remediation, the spatial extent of the problem has to be established and monitored. Recent developments in the application of remote sensing and GIS to the study of soil erosion offer considerable potential in this regard. This paper outlines key technologies available for monitoring, and highlights the problems to be solved at a regional scale. The status of the technologies used in South Africa are reviewed and the more recent studies related to soil erosion are presented in a comparative context. Spatial, temporal and measurement variabilities are major constraints in erosion assessment. Previous erosion studies conducted in South Africa at the regional scale have disregarded important erosion factors and have overvalued less important ones. Different processes and interactions are likely to emerge as dominant when crossing scale boundaries. Such considerations highlight the need to establish a methodological framework to guide and standardize future regional soil loss monitoring efforts.