China
Africa
Explore chapters and articles related to this topic
Coastal management issues
Published in Robert Kay, Jacqueline Alder, Coastal Planning and Management, 2017
Coastal management initiatives are usually a response to a demand to resolve problems such as conflicting uses of coastal resources, urbanisation, access, pollution and environmental degradation. Problems may also be related to poor liaison or inefficient coordination between those responsible for making decisions on the allocation of coastal resources; or they may even be a perception among decision-makers that a problem does not exist. A sound understanding of such issues is integral to planning an effective approach to coastal management. It is important that issues be addressed in a coordinated and integrated framework – a feature of good coastal planning. Such a framework ensures that individual issues are recognised, yet enables solutions to be developed that cut across as many issues as possible while avoiding the creation future issues.
Integrated coastal zone management
Published in Peter B. Myles, Maritime Clusters and the Ocean Economy, 2017
Coastal management is the complex interaction of laws, programs and efforts to evaluate tradeoffs and make decisions about how to use, conserve and value the resources and opportunities of the coastal zone. As a society, how do we want our coasts to function, what do we want them to look like, and what uses do we want them to accommodate? ICZM aims to reduce or eliminate such problems, resulting in ethical and economic benefits. Ethical benefits include sustainable development, the promotion of social equity (through consideration of viewpoints of all stakeholders) and protection of traditional uses of coastal resources. Economic benefits accrue from an integrated approach to management which can result in lower costs when compared to management for separate sectors. Effective planning for the future also provides cost benefits.
Risk assessment for typhoon-induced storm surges in Wenchang, Hainan Island of China
Published in Geomatics, Natural Hazards and Risk, 2021
Yuxing Wang, Zhixing Guo, Shuxian Zheng, Min Zhang, Xiejun Shu, Jun Luo, Liguo Qiu, Ting Gao
There are several discussions for this study, as follows.The purpose of this study is to provide a risk assessment for storm surge disasters which is a scientific support for coastal management as well as marine disaster prevention and mitigation. An intuitive and concise risk map is preferred by the local decision makers, so the PMSS scenario is selected to perform the hazard assessment, and then the classification of risk assessment is obtained by integrating the assessments on hazard and vulnerability. The PMSS scenario, which is composed of flooding maps that could capture the range of storm surge possibilities in Wenchang, has taken the most severe disasters into account and is suitable for decision making.The disadvantage of our method is that the flood map is not probabilistic, and the uncertainty is difficult to analyze. However, the shortcomings of our method could be made up by JPM/JPM-OS methods. The JPM/JPM-OS methods could provide probabilistic flood maps corresponding to any return period, and the results are scientifically more robust. However, the methods require abundant observations and a knowledge of the storm climatology of the study region, and JPM-OS method will be used in the future PMSS evaluation when conditions permit.The risk assessment is obtained based on the PMSS, so the results of risk assessment fall within the ranges of possible maximum levels, thus, there is limited guidance for real-time warning of storm surge disasters. For the real-time evaluation on risk levels of typhoon-induced storm surges, it is necessary to assess the risks of typhoon-induced storm surges with different levels and tracks, thereby establishing a multi-scenario risk database of typhoon-induced storm surges.The risk assessment in this study focuses on the current risks in a certain area, but the potential risk of storm surge disasters is poorly estimated. For example, the eastern coastal area of Dongzhai Harbor has a very high hazard level (Level I) but a low vulnerability level (Level IV), so it is classified as the risk zone of Level III. Therefore, it is not easy to attract the attention of administrators in disaster prevention and mitigation. However, if sensitive disaster-bearing bodies appear in the future, these regions will face a very large risk of storm surge disasters. Therefore, weight coefficients will be introduced in future work, thus both the current risk and potential risk could be comprehensively considered in risk assessments of marine disasters.It is important to keep the assessment results up-to-date with different environment situations. In the background of changing risk due to sea-level rise, protective measures such as newly built seawalls and significant changes of disaster-bearing bodies or land use, the risk of typhoon-induced storm surges should be re-evaluated so as to provide more accurate supports to the disaster prevention and mitigation.