面向文化遗址保护的物联网技术研究与应用

大部分文化遗址因其所处环境的特殊性,导致现有常规的信息化技术手段无法有效实施,而传统的文化遗址保护技术也无法实现文化遗产保护与利用的最大化。物联网作为一项新兴的前沿热门信息技术,已经广泛应用于众多领域,具有能够与文化遗址保护工作紧密结合的发展潜力。本工作首先分析了文化遗址保护的现状与面临的问题,并对物联网技术与文化遗址保护的关系进行了深入阐述。针对文物保护领域的特殊需求,着重描述了文物本体与环境信息采集、监测数据的远距离传输,监测数据的实时分析处理三方面相关的物联网技术,并对涉及关键技术应用解决方案进行了分析说明。最后简要介绍了已经部署运行的典型文化遗址保护利用系统———基于物联网技术的敦煌莫高窟保护与利用系统,系统经过连续几年的运行积累了大量的监测数据,为敦煌莫高窟文物的保护做出了重要的贡献。随着物联网技术的进一步发展,在文物保护方面的应用将更加深入和广泛,这将进一步提升文物保护工作的效率。     

Neighbourhood play on the endangered list: examining patterns in children's local activity and mobility using GPS monitoring and qualitative GIS

Children's time and freedom for independent neighbourhood activity is severely declining, which may be adversely impacting their healthy development. This study integrates GPS activity monitoring and environmental analysis in a geographic information system with activity diaries, annotated maps, surveys, and map-enhanced interviews to conduct a deep pattern analysis of children's habitual neighbourhood behaviour (n?=?23; aged 9–13 years) from each an urban and suburban school neighbourhood within London, Canada. Patterns in children's primary activities and settings, independent mobility (IM) levels, and perception and use of neighbourhood affordances are examined. Participants note a diverse range of local independent destinations, but habitually spend little time playing outdoors in neighbourhoods. Local activity related to free time available, perception of activity affordances, and license to travel independently. Social and environmental conditions of children's micro-neighbourhoods influenced independent destinations and domains. Neighbourhood planning should promote diversity of activity affordances and address conditions that support increased IM for youth.     

The October 2008 Nový Kostel earthquake swarm and its gas geochemical precursor

A gas geochemical precursor anomaly was identified prior to the October 2008 Nový Kostel (Czech Republic) earthquake swarm with a peak magnitude M_L of 3.8. This anomaly was observed as a deviation of CO₂ concentrations from the long‐term annual CO₂ concentration trend in the gas extracted from the scree at the Nový Kostel and Old?i?ská gas monitoring stations, which are directly above the Plesná valley‐Po?átky and Mariánské Lázně fault systems. Both sites are located within the major focal zone of the NW Bohemian swarm earthquake region at the northern edge of the Cheb Basin. A decrease in CO₂ concentration started at Nový Kostel in September 2008, 17 days before the swarm, opposite to the usually increasing annual trend in the autumn period, and ended with a nearly coseismic drop immediately prior to the onset of the first swarm. The CO₂ concentrations at Old?i?ská, deviating from the annual trend, did not further increase after August 2008. The calculated horizontal strain field, based on the data of two permanent Global Navigation Satellite Systems stations, proved there was horizontal compression in this period. The increasing compression along the Plesná valley‐Po?átky and Mariánské Lázně fault systems during the stress build‐up reduced the fault permeability prior to this earthquake swarm as indicated by the decrease in CO₂ concentration. The 17‐day duration of the earthquake precursor at Nový Kostel and about 65 days at Old?i?ská lie within the range of the precursor times that are hypothesized worldwide for an M_L = 3.8 earthquake. The nature of earthquake precursors and their origin are discussed, for example, as an indication of changed fault permeability by stress build‐up in the case of the Nový Kostel swarm earthquake precursor or as fault opening in other cases.     

Monitoring to Learn,Learning to Monitor: A Critical Analysis of Opportunities for Indigenous Community‐Based Monitoring of Environmental Change in Australian Rangelands

Indigenous community‐based monitoring has been a central feature in many international attempts to improve monitoring of and local adaptation to environmental change. Despite offering much promise, Indigenous community‐based monitoring has been underutilised in natural resource management in Australia, particularly within the remote, semi‐arid rangelands. This paper discusses contextual social and environmental factors that may help to explain this apparent deficiency, before critically analysing key stakeholder perceptions of the roles for, and challenges of monitoring in the Alinytjara Wilur ara Natural Resources Management region in the north‐west of South Australia. The analysis guides a discussion of responses to better integrate monitoring in general, and Indigenous community‐based monitoring in particular, into regional environmental management approaches. We argue that community‐based monitoring offers a range of benefits, including: better coordination between stakeholders; a heightened ability to detect and respond to climatic trends and impacts; the effective utilisation of Indigenous knowledge; employment opportunities for managing and monitoring natural resources; and improved learning and understanding of rangeland socio‐ecological systems. Identified opportunities for spatial and temporal community monitoring designed for the Alinytjara Wilur ara region could be of value to other remote rangeland and Indigenous institutions charged with the difficult task of monitoring, learning from, and responding to environmental change.     

Monitoring and Management Options in the Preservation of Urban Waterlogged Deposits,Nantwich, UK

A baseline survey in 2007 characterized the physical and chemical conditions for preservation within waterlogged remains at Nantwich. Installation of eighteen dipwells has allowed a five-year monitoring programme to be conducted from 2011. Two add-on projects supplemented this monitoring programme by examining the different methods for redox measurement, and for soil moisture measurement using Time Domain Reflectometry (TDR).

Initial results show two main zones of preservation, with reducing conditions attributed to location of the deposits in the floodplain, and a second zone uphill with more variable conditions for preservation. This study shows that sediment-coring programmes combined with dipwell installations can provide useful data to assess and monitor in situ preservation conditions, which can help to formulate management strategies for conservation of waterlogged archaeological deposits. This paper focuses on the efficacy of the methodology, referencing in particular comparative monitoring techniques and lists a series of recommendations for future studies.     

Preserving Medieval Farm Mounds in a Large Stormwater Retention Area

The Netherlands has denoted large areas as stormwater retention areas. These areas function as temporary storage locations for stormwater when rivers cannot cope with the amount of water. A large area, the Onlanden — 2,500 hectares — was developed as such a storage area between 2008 and 2013. This peat area contains up to 300 medieval housing areas. These ‘peatmounds’, named after the current visible small mound, were explicitly mentioned as a preservation goal in the project. The preservation of the peatmounds during and after the project has been guaranteed by a combination of protective measures, research, and monitoring actions. At first a risk evaluation was performed, followed by a monitoring project focusing on the preservation of the organic part of the mounds. This evaluation showed that the rewetting of the mounds might improve the overall preservation. A total of fifteen monitoring stations were a-selectively distributed over the total area, covering the four main types of land use. The measured parameters at these stations focus on the desiccation/rewetting effects. The second threat, as determined in the risk evaluation, is the growth of deep penetrating plants. These roots might disturb the archaeological profile. Preventive coverage with plastic and up to a metre of soil could prevent root growth into the archaeology. An experimental coverage showed the effectiveness of this technique, but also the risks. This paper focuses on the lessons that can be learned from this six-year project, the monitoring results, and clearly shows the benefits of a combined approach in large-scale projects.     

How to Carefully Construct a Hospital over a Roman Boat in Central London,UK

This paper examines the Roman boat, buried beneath Guys Hospital in London, UK. A small part was discovered in 1958, and has been carefully left free of disturbance since that date. In 2009, a proposal was made to construct a 14-storey building above the boat; clearly raising challenges for preservation, not to mention the philosophy of burying or excavating and entire ancient monument. A trial pit was opened to see if any remains of the boat survived and uncovered well-preserved timber planks and nails preserved five metres below ground level. Consequently, archaeologists worked closely with the entire design team, determined that more was required than the usual scheme of preserving and monitoring the boat. A legal agreement was secured, making this one of the few projects in the world to have a clearly structured and enforceable plan, if the monitoring data show demonstrable deterioration.     

Lowland Floodplain Responses to Extreme Flood Events: Long-Term Studies and Short-Term Microbial Community Response to Water Environment Impacts

Abstract

Targeted studies of waterlogged burial environments allow researchers to gain holistic insights into the physico-chemical and biological condition of wetlands that have the potential to contain organic remains of both anthropogenic and biogenic origin. Recent research has shown that microbial community diversity and functioning are intimately linked to physical and chemical parameters, such that environmental perturbations may have the potential to enhance the effectiveness of microbial communities in the degradation process. Our studies have shown that, as a consequence of the 2007 floods which impacted upon many British lowland rivers, a rapid microbial response to environmental perturbations can be demonstrated within the wetland deposits being monitored. As such, a quantification of the latent functionality of micro-organisms in a soil profile may be of fundamental importance for our understanding of potential in situ degradation processes; and, as a consequence, the likelihood for the biodegradation of sensitive archaeo-organic remains; a factor which is of primary importance for both ongoing and future mitigation strategies, and attempts at managing the cultural resource of wetlands.

This paper will present a consideration of the effectiveness of a long-term research project in a lowland wetland at Newington, Nottinghamshire, England, studied between 2004 and 2008; and evaluate the efficacy of this study in relation to the significant impacts that occurred as a result of the severe floods in 2007. We conclude that the data generated after the floods necessitated a total re-evaluation of the first approximately two years of environmental monitoring, and that the impacts throughout the sediment profile continued for some time after the initial flood event. These observations potentially have far-reaching implications for future in situ monitoring as disruptions to weather patterns influence the various environmental impacts on the wetland resource.     

Quantification and Visualization of In Situ Degradation at the World Heritage Site Bryggen in Bergen,Norway

Abstract

Environmental monitoring at the World Heritage Site of Bryggen in Bergen, Norway, has shown damaging settling rates caused by degradation of underlying archaeological deposits. Measurements of piezometric head, oxygen, and soil moisture content, as well as chemical analyses of water and soil samples are key elements of the environmental monitoring.

Groundwater monitoring and geochemical analyses reveal a complex and dynamic flow through the natural and anthropogenic stratigraphy. The preservation conditions within the organic archaeological deposits are strongly correlated with oxygen and soil moisture content, that are controlled by the groundwater flow conditions at the site. To quantify decay rates, it is thus essential to understand the wider hydrogeological context of the site. This paper presents recent advancements in quantifying decay rates in the saturated zone at Bryggen. The paper also shows that 3D geo-archaeological modelling can contribute to preservation management by visually combining results of geological, archaeological, geochemical, and hydrological investigations. This opens up for improved multidisciplinary understanding of preservation potential, thereby contributing to an improved protection of archaeological deposits in situ.     

Founding of a Monumentenwacht for Archaeological Heritage in Flanders (Belgium)

Abstract

In August 2009, Monumentenwacht Vlaanderen set out to develop a new service and monitoring system for archaeological heritage in Flanders. Such an initiative takes time, for it needs to be done thoroughly, and there are many questions that need to be addressed. The answers can be found partly in examples in other countries, but must also be evolved in practice within the Flemish context, where a policy on in situ preservation of archaeological heritage is still in its infancy. This paper explains how this new service has been set up.