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首页> 外文期刊>Australian journal of environmental management >The cost effectiveness of remediating erosion gullies: a case study in the Fitzroy
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The cost effectiveness of remediating erosion gullies: a case study in the Fitzroy

机译：补救侵蚀沟渠的成本效益：菲茨罗伊的案例研究

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摘要

Grazing in the Fitzroy region has reduced ground cover and increased the exposure of erosion features to terrestrial water flows, resulting in gullies. The run-off that results from such soil degradation has led to elevated levels of sediment in the Great Barrier Reef, adversely affecting the health of the reef. Strategies to reduce gully erosion include: decreasing stocking rates on grazing land, revegetation of erosion features and the implementation of specific infrastructure including fencing and earth works. Using data provided by the Fitzroy Basin Association Inc., this paper presents a case study of the cost effectiveness of gully remediation at six properties across the Fitzroy. Our results reveal a broad range of cost effectiveness among these sites, highlighting the importance of both the selection of policy mechanism and the need for targeted remediation measures. The pattern of cost effectiveness for these sites also raises the possibility of economies of scale in gully work, which could indicate funding advantages from targeting projects that address large volumes of gully erosion. Finally, the magnitude of the costs per unit of sediment reduction at these sites indicates the need to consider a broad spectrum of policy responses to reduce sediment export to the reef.
机译：在菲茨罗伊地区放牧减少了地面覆盖，增加了侵蚀特征对地面水流的暴露，从而导致了沟壑。由这种土壤退化引起的径流导致大堡礁中的沉积物含量升高，对珊瑚礁的健康产生不利影响。减少沟壑侵蚀的策略包括：降低牧场的放养率，恢复侵蚀特征的植被以及实施包括栅栏和土方工程在内的特定基础设施。利用菲茨罗伊盆地协会公司提供的数据，本文对菲茨罗伊的六处房产进行沟壑修复的成本效益进行了案例研究。我们的结果揭示了这些站点之间广泛的成本效益，突出了选择政策机制和制定有针对性的补救措施的重要性。这些地点的成本效益模式也增加了沟渠工作规模经济的可能性，这可能表明针对解决大量沟壑侵蚀的项目提供了资金优势。最后，在这些地点减少单位沉积物成本的幅度表明需要考虑广泛的政策对策，以减少沉积物向珊瑚礁的出口。

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