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On the status and mechanisms of coastal erosion in Marawila Beach, Sri Lanka

机译：论斯里兰卡马拉维拉海滩沿海侵蚀的现状与机制

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摘要

Coastal erosion remains a problem in many developing countries because of a limited understating of erosion mechanisms and management. Sri Lanka is one of the countries that recognized coastal erosion management as a governmental responsibility, in 1984. Nevertheless, erosion mechanisms have not yet been fully understood. We investigate the status and mechanisms of coastal erosion using empirically collected data and various techniques, such as Geographic Information System analysis of satellite images, drone mapping, bathymetric surveys, hindcasting of wind-induced wave climate, questionnaires, and semi-structured interview surveys. We identified wave climate change, reduction in river sand supply, interruptions from previous erosion management measures, and offshore sand mining as potential causes of erosion considering sediment flux and rates of erosion. Erosion of Marawila Beach began during 2005-2010 and has been continuing ever since, due to a lack of integration in the beach and the entire sediment system. It is necessary to identify the long-term, large-scale changes in the sediment system through data collection. This study highlights the importance of an integrated coastal erosion management plan and could facilitate better coastal erosion management in Sri Lanka, as well as in other developing countries.
机译：沿海侵蚀仍然是许多发展中国家的问题，因为对侵蚀机制和管理有有限的影响。 1984年，斯里兰卡是将沿海侵蚀管理作为政府责任的国家之一。尽管如此，侵蚀机制尚未完全明白。我们使用经验收集的数据和各种技术研究了沿海侵蚀的地位和机制，例如卫星图像的地理信息系统分析，无人机映射，沐浴疗法，风诱导波浪气候，问卷和半结构化访谈调查。我们确定了波浪气候变化，减少河水供应，从以前的侵蚀管理措施中断，以及近海沙坑作为考虑沉积物通量和侵蚀率的潜在原因。 Marawila Beach的侵蚀开始于2005 - 2010年期间，自从缺乏在海滩和整个沉积物系统中缺乏融合，以来一直在继续。有必要通过数据收集识别沉积物系统中的长期大规模变化。本研究突出了综合沿海侵蚀管理计划的重要性，并可以促进斯里兰卡以及其他发展中国家更好的沿海侵蚀管理。

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