Search

Nature‐based coastal adaptation is a subset of nature‐based solutions that has to this point focused on the materiality of managing coastal risks: what our coastal protections are made of or where we put things that are in the way of harm. In our collaborative interdisciplinary work, we have been reimagining nature‐based coastal adaptation to start with first principles: how we think about the coast and what makes a good coastal life. In a nature‐based approach our shared sense of what is good and possible, also known as the social imaginary, needs shifting before any physical material. This paper presents a new nested framework for thinking about nature‐based coastal adaptation using five words starting with R: Reimagine, Reserve, Relocate, Restore, Reinforce. We use the nature‐based adaptation option of managed dyke realignment in Bay of Fundy agricultural dykelands to illustrate the utility of the framework in practice but assert its more generic applicability. [ABSTRACT FROM AUTHOR]

Copyright of Canadian Geographer is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A numerical hydrodynamic model was used to simulate the generation and evolution of storm surges in Atlantic Canada in response to synoptic‐scale surface wind and atmospheric pressure fields. The modelling was conducted as part of a broader initiative to support community‐scale inundation modelling and coastal flood risk assessment for communities located in the Acadian Peninsula region of New Brunswick. The 44 largest storm surge events on record at a tide gauge proximate to the region of interest were simulated using the numerical model. Initially, a comparison between simulated storm surges and peak non‐tidal residuals from tide gauge records showed relatively poor agreement, producing an R2 value of 0.403. Model skill was improved by incorporating the influence of sea ice cover on air‐sea momentum transfer in the hydrodynamic model, and improved correlation with measured residuals was obtained by adding estimates of wave set‐up to the predicted storm surges, ultimately resulting in an R2 value of 0.803. The results of the simulations provided a basis for identifying distinct regional factors affecting storm surges and water level residuals and demonstrated conditions where wave set‐up and sea ice cover play an important role in contributing to extreme high water levels. [ABSTRACT FROM AUTHOR]

The issue of microplastic pollution has seen an increasing focus over the last decade, both as a scientific research topic and due to intensive media interest. Despite this, there has been, until recently, a relative paucity of data relating to the volume and type of microplastics in the marine environment. The Cell 1 Regional Coastal Monitoring Programme, which covers approximately 300 km of the northeast England coastline, has recently collected subtidal sediment samples from the bed of the North Sea and analysed these for particle size distribution and microplastic content. This paper presents the results of this analysis along with a literature review of the sources, movements and concentration of microplastics in the marine environment. [ABSTRACT FROM AUTHOR]

Increased exposure of urban areas to flood risk, especially related to climate change, has promoted interest in sustainable approaches to flood risk management ( FRM), including the use of natural processes. In this context, the study set out to review the potential contribution of rural land management to the alleviation of flood risk and the suitability of a range of instruments, such as land sales, leasebacks, easements and annual payments that have been, or can be used to mobilise the provision of FRM services by land managers. Insights from literature, key informants, a review of international experience and a stakeholder workshop were used. Frameworks were developed to conceptualise and guide the selection of mechanisms of exchange between buyers and sellers of rural land-based FRM services. Key challenges concern the definition of units of FRM service and the design of exchange mechanisms to satisfy the different needs of flood risk managers, land managers and other interests. [ABSTRACT FROM AUTHOR]

Groundwater flooding has moved up the policy-makers' agenda as a result of the United Kingdom experiencing extensive groundwater flooding in winter 2000/2001. However, there is a lack of appropriate methods and data to support groundwater flood risk assessment. The implications for flood risk assessment of groundwater flooding are outlined using a study of the Chalk aquifer underlying the Pang and Lambourn catchments in Berkshire, UK. Groundwater flooding in the Chalk results from the water table reaching the land surface and producing long-duration surface flows (weeks to months), causing significant disruption to transport infrastructure and households. By analyzing existing data with a farmers' survey, it was found that groundwater flooding consists of a combination of intermittent stream discharge and anomalous springflow. This work shows that there is a significant challenge involved in drawing together data and understanding of groundwater flooding, which includes vital local knowledge, reasonable risk assessment procedures and deterministic modelling. [ABSTRACT FROM AUTHOR]

Integrated coastal zone management (ICZM) is a challenging process, defined by stakeholder engagement and underpinned by knowledge on the integrated behaviour of coastal systems. While significant advancements in ICZM have been made, a range of difficult and important questions about ‘integration’ remain to be explored. This paper discusses opportunities for addressing such challenges of integration through the application of geographical thinking to understanding and managing coastal environments. It focuses on geographical traditions on systems thinking, the process-based nature of geographic research and geographical contributions to conceptualising place and our relationships to it. Using UK-based case studies the paper explores integration challenges from three different coastal contexts and management perspectives, examining: adaptation through managed realignment in a local community, integrated flood risk management in London and the Thames Estuary and enhancing the ‘socially just’ nature of coastal management. The case-study discussion highlights the importance of ‘geographical thought’ to improving the integrative basis of strategies for managing complex coastal environments. This paper argues that ‘thinking geographically’ is one logical vehicle for increasing our understanding of, and providing solutions to, barriers which limit progress towards greater ‘integration’ in coastal management. Geography is dynamic, plural and based on the recognition that reality is contested and as such geographical ideas could add considerably to emerging cross-disciplinary knowledge on the interactions and interdependencies of behaviours within coastal systems. [ABSTRACT FROM AUTHOR]

This paper builds on the 'Flooding from Other Sources' project (HA4a), funded as part of Defra's Making Space for Water strategy. The HA4a study concluded that flood risk mapping is feasible for many of the sources of flooding that were investigated, which are not currently covered by the Environment Agency Flood Map, using existing flow modelling and GIS tools. However, there are some major constraints in terms of the need to undertake extensive data collection to allow the generation of useful flood maps that are not dominated by modelling uncertainties. The project anticipated that different levels of data collection and modelling might be needed for different purposes, given the hierarchical nature of UK flood risk assessment and management in the United Kingdom under PPS25 and the EC Floods Directive. This paper compares and contrasts three different approaches to urban flood modelling using topographic analysis, blanket extreme rainfall and semi-coupled sewer/overland routing. The UK summer floods 2007 have highlighted the pressing need for mapping the risk from urban flash flooding, and the Pitt Review has recommended that areas at high risk from surface waters should be urgently identified. This can be done now at some level of detail, and we can be guided as to what level, from our increasing knowledge of vulnerable populations, from records of historical flooding and by using some of the screening methods described herein. [ABSTRACT FROM AUTHOR]

The article mentions the 60th anniversary of the River & Coastal Group of the Chartered Institution of Water and Environmental Management (CIWEM) in Great Britain.