Coastal landfill and shoreline management: implications for coastal adaptation infrastructure

考虑到气候变化对海平面上升的影响，我们需要管理未来的海岸线，同时平衡公共投资和利益。人们强烈希望转向更可持续的海岸线管理，这将使欠发达沿海地区的海岸更具活力。现在的海岸线管理计划考虑了“有管理的调整”和“不主动干预”政策的好处，而不是僵化地捍卫和保持现有的海岸线。然而，数百个沿海垃圾填埋场的重要遗产位于我们海岸周围的洪泛平原，包括河口。这限制了海岸线管理的动态政策，因为风暴和海平面上升可能导致污染物更多地冲入环境，而垃圾填埋场的侵蚀可能导致直接暴露和释放潜在的危险废物。它提出了一个问题，即移动/处理这些垃圾填埋场的能力（促进向更有活力的海岸移动），或者在海平面上升的情况下继续保护这些地点，这可能会导致国防基础设施方法的锁定。该项目旨在应用nerc资助的研究和南安普顿大学的其他相关研究，以及CIRIA关于“侵蚀或低洼海岸线上垃圾填埋场和土地污染管理指南”的通用指南C718，以更好地了解动态海岸上沿海垃圾填埋场的有效长期管理。在海岸线管理规划方面，它将评估一系列不同的管理办法，这些办法有可能解决沿海垃圾填埋场造成的困难。我们将确定从莱姆里吉斯到肖勒姆的3到4个沿海垃圾填埋场，并考虑它们对两种不同气候变化情景下三种海岸线管理计划战略选择（保持路线，管理调整和不积极干预）的影响。在任何涉及转移及/或就地修复废物的方案中，都会考虑由水浸（导致污染的水（渗滤液））和对堆填区的侵蚀等双重危险所引致的污染风险，以及从旧地点回收资源的可能性。我们的项目合作伙伴是环境署，SCOPAC（与海岸线相关问题常设会议），这是一个有影响力的地方当局和组织网络，对英格兰中南部海岸的管理感兴趣，东索伦特海岸伙伴关系和新森林地区议会主办的海峡海岸天文台。关键词：海岸线管理，气候变化，海平面上升，洪水，垃圾填埋

Our coastlines need to be managed into the future taking into account the effect of climate change on rising sea levels, whilst balancing public investment and benefits. There is a strong desire to move to more sustainable shoreline management, which allows coasts to be more dynamic in less developed coastal areas. Rather than rigidly defending and holding the existing coastline, shoreline management plans now consider the benefits of "managed realignment" and "no active intervention" policies. However, there is an important legacy of hundreds of coastal landfills located in flood plains around our coasts, including estuaries. This constrains a dynamic policy for shoreline management as storms and rising sea levels may lead to increased flushing of contaminants into the environment and erosion of the landfill may result in the direct exposure and release of potentially hazardous waste. It raises the question about the ability to move/process these landfills (facilitating a move to more dynamic coasts), or alternatively to continue to protect these sites under rising sea levels, potentially creating a lock-in to defence infrastructure approaches.This project aims to apply NERC-funded and other relevant research at the University of Southampton, together with CIRIA generic guidance C718 on "Guidance on the management of landfill sites and land contamination on eroding or low-lying coastlines", to better understand the effective long-term management of coastal-located waste sites on dynamic coasts. In the context of shoreline management planning it will assess a series of different management approaches that have the potential to address the difficulties that coastal landfills pose. We will identify 3 to 4 coastal landfills from Lyme Regis to Shoreham and consider their impact on three shoreline management plan strategic options (hold the line, managed realignment, and no active intervention) for two different climate change scenarios. Pollution risks arising from the dual hazards of flooding, leading to the release of contaminated water (leachate), and erosion of the landfills will be considered along with the potential for resource recovery from the old site in any options that involve moving and/or remediating the waste in situ. Our project partners are the Environment Agency, SCOPAC (Standing Conference on Problems Associated with the Coastline) which is an influential network of local authorities and organisations with an interest in the management of the coast of central southern England, the Eastern Solent Coastal Partnership and the Channel Coastal Observatory hosted by New Forest District Council.Keywords: Shoreline Management, climate change, sea level rise, flooding, landfill