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1.
A strategic framework for monitoring natural and human-induced change in the coastal plains of the Alligator Rivers Region in the wet-dry tropics of northern Australia is presented. The framework also supports refinement of methods used to monitor the vulnerability of coastal areas to change, including human-induced climate change and sea-level rise. The information derived through the framework can be used to assess scenarios, highlight the potential significance and implications of changes, and assist land managers formulate management responses. The framework incorporates several large-scale studies for monitoring atmospheric and hydrodynamic processes as well as mapping and monitoring projects specific to environmental change in the freshwater wetlands and the floodplains of the Region. Monitoring is proposed to address processes influencing the stability and rate of change of the floodplain environments. These include large-scale processes, such as inter-annual variability in weather conditions affecting the morphology of the coastal plains, shoreline and riverbank stabilisation, headward expansion of tidal creeks, and salinisation of freshwater basins. Information management is also addressed, and a Geographic Information System structure proposed for effective data collation, analysis and management. The information management system will facilitate data sharing and participation of multiple agencies and organisations interested in coastal change, especially where a landscape perspective or whole ecosystem approach is advocated.  相似文献   

2.
A robust debate among coastal geomorphologists as to the processes by which beach‐ridge plains around Australia have formed was initiated by a former President of the Institute of Australian Geographers. This review gives special consideration to the work of Jack L. Davies, whose academic contributions to coastal geomorphology in Australia have not always been appropriately acknowledged when explaining how similar plains have evolved elsewhere in the world. Davies recognised that relatively steep storm waves caused erosion (cut) on beaches, whereas less steep long‐period swell waves returned sand (fill). He considered the beach berm to be the nucleus on which a beach ridge formed, which could subsequently develop into a foredune, in contrast to cobble ridges that were deposited during storms. Offshore conditions regulate supply of sand to the shoreline, partly through effects on wave refraction, with higher rates of supply where the nearshore is shallow. It was apparent to Davies that the elevation of successive ridges might, but not necessarily, provide evidence of past changes of sea level, despite adornment by variable amounts of windblown dune sand. Morphodynamic understanding of long‐term coastal evolution, based on radiocarbon dating chronologies, has demonstrated that Australian coastal plains formed over the past ~6,000 years when sea level has been close to its present level, in contrast to several documented locations in the northern hemisphere where the sea has been rising for the past few millennia. Particularly insightful were observations by Davies that ridge formation could be influenced by a range of factors including changes in sea level, storminess, or sediment supply. These factors acting singly or in combination seem likely to change in the future. Understanding such responses remains a high priority and can be addressed by new technologies, such as light detection and ranging, optically stimulated luminescence dating, ground‐penetrating radar, and computer simulation.  相似文献   

3.
沿海景观作为海洋景观与陆地景观的边界,是特色鲜明和空间异质性突出的系统整体。同时沿海地区一直是人类开发较早、人地关系紧密、系统物能交换最频繁、最集中的区域,对海-陆-气系统耦合力和内外营力具有高度的敏感性,因此保持沿海景观的生态整体性尤为重要。研究沿海景观的景观体系和开发利用,目前在我国仍属于薄弱环节。本文评述福建沿海景观分类并概括其生态特征,应用景观生态的原理,探讨福建沿海景观旅游保护性开发模式,构建和谐稳定的景观格局。  相似文献   

4.
We here report the first results from a systematic research project in Mani (Southern Greece), which includes survey and test excavations. Forty-six caves, rockshelters and open-air sites in lowland settings were surveyed. Geomorphological data were collected in order to assess how geological processes affect the preservation of sites and bias site distribution patterns. Artifacts manufactured from non-local rock indicate potential raw material transfers and suggest links among the different regions of Mani, related to mobility patterns. Our research in the Mani has nearly doubled the number of known Middle Palaeolithic sites from the region and confirmed that the peninsula has the strongest ‘Neanderthal signal’ identified to date in Greece. Almost all sites are located at coastal areas. Despite the influence of Pleistocene landscape dynamics, this distribution emerges as a persistent pattern, perhaps indicating a preference for coastal locations. The Neanderthal occupation of Mani can illuminate important aspects of Middle Palaeolithic adaptation in one of the southernmost coastal regions of Europe.  相似文献   

5.
6.
The archaeological remains of ships in the beach zone are part of a complex and dynamic system. Being periodically exposed and reburied, they vary between being both visible and frequently forgotten features of the physical and cultural coastal landscape. These limited and non-renewable resources are highly susceptible to instability within the landscape. Challenges to stability result in these resources being damaged, ignored, or forgotten, leading to a potential loss of pertinent social, economic, and physical information. Although little can be done to prevent certain physical actions, a better understanding of physical and cultural processes allows for their mitigation and better management practices for the beached shipwreck resource. This paper looks at how stability is defined in relation to beached shipwreck sites and how these definitions impact the management of the resource of two case study sites in Maine and North Carolina.  相似文献   

7.
Climate change risks to coastal communities may overwhelm current management strategies. The emergence of nature-based solutions could provide alternative approaches for climate adaptation; however, studies on their public acceptability are limited. This research focuses on the human dimensions of nature-based coastal adaptation solutions. The research sought to understand the kind of environmental changes participants were experiencing in their coastal communities of Nova Scotia and what management responses they observed being taken, if any. Online focus groups were held with coastal property owners in Nova Scotia to understand how they assess coastal risks and four approaches to nature-based coastal adaptation: living shorelines, accommodation, retreat, and dyke realignment to make space for wetland restoration. Results revealed ongoing trust in traditional hard-line approaches, but also interest in knowing more about nature-based options. There was general support for living shorelines, albeit with scepticism; a concern that accommodation is just a “band-aid” approach; resistance to retreat, despite general recognition of its future utility; and a lack of understanding of dyke realignment. The successful implementation of nature-based coastal adaptation approaches will require more evidence of their viability, better options for financing them, and engagement with communities around the best-fit alternatives for them.  相似文献   

8.
苏小东 《安徽史学》2007,(1):99-105
刘铭传以武将而跻身于封疆大吏之列,其一生之建树重在“事功”而非“理论”。正因为如此,他虽然也曾就海防及其相关问题有过全面系统的论说,但其认识水平显然不及同时代之佼佼者。关于台湾在中国海防中的战略地位,他也是在领导抗法保台、建台的过程中逐步加深认识的,并以首任台湾巡抚之地位不遗余力地将其思想主张付诸实践,开创了包括海防在内的台湾近代化新局面。刘铭传加速台湾建设、加强台湾海防的初衷是为了抵御日本的侵略,不料数年之后,台湾竞因北洋海防的崩溃而落入日本之手。这绝不是刘铭传个人的悲哀,实乃国家民族之大悲剧。  相似文献   

9.
Increasing evidence indicates that ongoing and future climate change impacts, such as enhanced coastal erosion driven by intensified storms and sea-level rise, will be destructive or problematic for coastal archaeological heritage. Approaches to this problem range from broad-scale GIS-based vulnerability assessments to site-scale monitoring and survey. In all cases, the approach chosen should be based on the best-available data on the local historic environment and pattern of coastal change. Therefore, this paper will demonstrate how such data can be successively acquired and enhanced using an integrated approach that builds on and refines a previously conducted broad-scale vulnerability assessment. This approach was adopted in the study region (Northern Ireland) owing to a lack of coherent and up-to-date information on shoreline change. This approach incorporated the GIS-based Digital Shoreline Analysis System (DSAS) to quantify and analyze local shoreline change. DSAS is a software extension for ESRI ArcGIS which allows calculation of rate-of-change statistics using past shorelines identified from georeferenced historic maps and vertical aerial imagery. Additionally, a field survey was conducted to assess the condition of recorded sites, and identify unrecorded ones. Results revealed a more complex pattern of shoreline change in the study area (Magilligan Foreland, Lough Foyle) than previously anticipated, with zones of significant erosion interspersed with areas of stability or advance. Fifty-one new sites ranging from the prehistoric period to the Second World War were also identified. The new information was used to develop a priority classification based on site significance, condition and risk level which improved significantly on the uniform classification of the original broad-scale assessment.  相似文献   

10.
刘铭传以武将而跻身于封疆大吏之列,其一生之建树重在"事功"而非"理论".正因为如此,他虽然也曾就海防及其相关问题有过全面系统的论说,但其认识水平显然不及同时代之佼佼者.关于台湾在中国海防中的战略地位,他也是在领导抗法保台、建台的过程中逐步加深认识的,并以首任台湾巡抚之地位不遗余力地将其思想主张付诸实践,开创了包括海防在内的台湾近代化新局面.刘铭传加速台湾建设、加强台湾海防的初衷是为了抵御日本的侵略,不料数年之后,台湾竞因北洋海防的崩溃而落入日本之手.这绝不是刘铭传个人的悲哀,实乃国家民族之大悲剧.  相似文献   

11.
Supported by the U.S. National Park Service's Historic Preservation Fund program, the Rhode Island Historical Preservation and Heritage Commission administered surveys of coastal archaeological sites damaged by 2012's Hurricane Sandy in Rhode Island, USA. This project documented the transformative effects of Hurricane Sandy on coastal archaeological sites, evaluated the eligibility of many of those sites for listing in the National Register of Historic Places, and provided new insights into ancient Native American coastal occupation. Notable project limitations include incomplete property access, bureaucratic delays, and a Tribal collaboration that fell short. Because preserving most of these erosion-prone sites through shoreline stabilization is unlikely, management efforts will consider preemptive archaeological salvage excavations. This case study may prove useful to archaeologists worldwide who are managing coastal sites threatened by rising sea levels and storms of increasing intensity and frequency.  相似文献   

12.
沈正平  韩雪 《人文地理》2007,22(6):47-51
在海洋经济区中,海岸带具有一定的特殊性。虽然其资源丰富且种类繁多,但由于受到多种作用力的交互影响,而客观上存在各种灾害频繁、生态环境脆弱等问题,因此迫切需要实施可持续发展。江苏是海洋资源大省,海涂面积占全国海涂总面积高达30%左右,大陆海岸线长度约占全国大陆海岸线总长度的5.3%,但却又是海洋经济弱省,其海洋产业产值仅占全国海洋产业总产值的4.4%,与广东(21.71%)、山东(14.14%)、浙江(14.05%)、福建(12.68%)相比存在很大差距,已经成为江苏区域发展中必须正视和急于解决的突出问题。本文从可持续发展原理出发,通过分析江苏省海岸带的特点及其开发利用现状与存在问题,提出了实施其可持续发展的战略选择以及所应采取的主要措施。  相似文献   

13.
This paper considers the feelings that are evoked in, and by, coastal places. We are particularly interested in how emotional connections with the coastal environment can be a resource and motivation for place-protective action. We draw on stakeholder interviews undertaken in the northern New Zealand locality of Ngunguru in 2008–2009. This site was a ‘hot spot’ of community concern around a proposed major residential development. Our data reveal the depths of feelings for the character of the coastline, as well as the capacity of such feelings to generate mobilisation against change. These feelings encompassed general anxiety about coastal development in New Zealand and outrage at its motivations. Respondents also articulated a particular love for the Ngunguru coast, encompassing feelings of connection, sacredness and reverence. We conclude that concern for feelings is critical to understanding what is at stake in contests around coastal development. While these contests also entail the more readily quantified issues that tend to be highlighted in both planning and academic contexts, the nature of human affection for the coast means that emotions can play a formative role in shaping local understandings and motivating actions.  相似文献   

14.
For a long time in Scotland, diasporic – and popular – heritage with its imaginary emphasising kinship, stylised images and ritualised practices was either overlooked or discredited. The term ‘diaspora’ itself to define Scotland’s vast overseas population has been scrutinised for its usefulness. However, since devolution, it has gained currency in public discourse and policies and has led to the ‘re-diasporisation’ of Scotland. Yet, the ‘diaspora’ had long been identified as an important niche market in relation to heritage perceived as an economic resource. This article explores the changing perception and place of diasporic heritage in Scotland since the 1970s through two case studies. Focusing on processes of remembrance of nineteenth-century Highland emigration materialised through monuments and museums, it highlights the conflicting and shifting relationships that different communities – home and diasporic – have with their past, place and the meanings ascribed to them. The transnational memories increasingly promoted in Scotland act as a means of re-energising nationhood and initiating revisions and re-reading of popular and diasporic culture.  相似文献   

15.
明清时期,广东的海防部署依据不同的区域划分呈现出循序渐进的"分路"特征,即从元末三路分防的萌芽,到明中叶的全面成型,再到清代四路甚至五路的发展。关于广东海防分路的时间,本文认为早在元末已经出现,当时中路的虎头门、南头澳等地均是重要的海防要塞,明初的广东海防从无备到有备,实际上借鉴了元末的海防实践,而对于肇庆府在明清两代并不归属中路海防区域,本文也明确提出自己的看法。从元末到清末,广东海防分路的漫长发展演变不仅是海防部署工作的细化,更体现了明清两代区域海防工作责任的日益繁重。  相似文献   

16.
海岸带可持续发展与综合管理研究   总被引:5,自引:0,他引:5  
张景秋 《人文地理》1998,13(3):41-45
海岸带因其位于海陆交接地带而具有特殊的生态系统,随着世界各国工业化和城市化进程的加剧,海岸带生境系统受到严重损害;这一状况已日益为沿海国家所重视,以经济与环境协调发展为核心的可持续发展理论成为海岸带综合管理的基础;同时,海岸带综合管理也是促进沿海国家持续发展的有利手段。本文从阐述海岸带可持续发展的内涵出发,分析了海岸带综合管理的发展和结构;最后,对我国海岸带综合管理提出几点建议。  相似文献   

17.
Although the productive fishing grounds had long attracted the Crown and the Church to northern Sweden, it was not until the sixteenth century that the judicial and fiscal powers of the Swedish Crown were exercised in full. Records show that the regular fishing in interior lakes formed a prominent enterprise among coastal farmer communities. This paper examines the social and economic context of farmers engaged in interior fishing with respect to the internal organization of village communities, principles of private and collective ownership, land-use strategies and inter-community relations. There are no a-priori assumptions about the coastal population being “Swedish”. Instead of applying ethnonyms, the terms “farmer” and “coastal” are used throughout the paper. The main area of investigation includes the coastal area of northernmost Sweden and the western parts of Finnish Lapland. The study shows that interior lakes fitted into village resource areas, long sanctioned by usage, and that usufruct belonged to village members collectively. A large part of the fishing lakes are situated in interior Sámi territory. Fishermen were internalizing Sámi place names, implying close relations between the groups. Archeological investigations point to subsistence strategies including systemic interior lake fishing being established before AD 1200. The authors propose that coastal and interior communities should be perceived as two economic strategies representing indigenous and pre-colonial land-use schemes.  相似文献   

18.
韩海珍 《攀登》2008,27(6):92-95
构建社会主义和谐社会是党中央提出的战略目标。就业是民生之本,也是社会和谐之本,是影响经济社会协调发展与广大公众安居乐业的战略问题。面对西部地区严峻的就业形势,有效促进劳动力就业是构建社会主义和谐社会的重要基础。  相似文献   

19.
刘俊 《人文地理》2010,25(4):115-119
三亚亚龙湾和北海银滩是我国海滨度假区发展的典型案例。在大量田野调查和对关键信息提供者深度访谈基础上,从度假区地方政府介入程度及方式、土地管理、招商引资、开发水平和绩效等方面进行了比较研究。研究发现,亚龙湾度假区是企业主导下市场化发展模式,而银滩度假区则是地方政府主导发展模式。以后者为代表的过度行政化治理结构是我国现阶段海滨度假区发展的制度特征。新时期海滨度假区需要探索政府和市场分工明确、责权清晰、优势互补、科学合理的治理结构,使得度假区在市场机制的引导下良性健康稳步发展。  相似文献   

20.
The tidal prism in the River Murray estuary has been reduced by over 85 percent since completion of the barrages in 1940 and regulation has diminished the rate and size of river flows through the estuary. Reduced fluvial flushing has emphasised the dominance of coastal processes at the river mouth. These are expressed in the accretion and stabilisation of a flood-tidal delta, the migration of the mouth, the erosion of Sir Richard Peninsula and the accumulation of new flood-tidal deltaic deposits. Inconclusive studies relating river flow to mouth migration indicate the importance of coastal processes such as littoral drift, tidal flux and sea state, particularly at times of low river flow, in explaining the position and morphology of the mouth. Previous management strategies have failed to consider coastal processes adequately.  相似文献   

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