国外交通地理学研究的知识图谱与进展

交通地理学作为人文地理学的重要分支,一直充满着活力与多样性,获得人文地理学者的广泛关注。本文基于CiteSpace可视化软件,采用Web of Science中收录1982-2014年的4840篇交通地理学论文作为原始数据,梳理了近30年的研究脉络,绘制了学科发展的知识图谱,系统地归纳了学科的研究热点与发展趋势,以期为中国交通地理学研究提供借鉴。研究发现:国外交通地理学研究方法和研究内容日趋多元化,研究视角趋向微观化,质性研究突显;初步形成城市规划学派、理论地理学派、时间地理学派等六大学术共同体;出现社会、行为、文化和流动的诸多转向,呈现出人本导向、信息导向和交叉化的发展趋势。     

海峡西岸经济区战略下区域综合交通可达性演变态势研究

"海峡西岸经济区"的建设是完善我国对外开放和区域经济格局的重要板块,而综合交通可达性则是衡量区域一体化发展以及区内外经济社会联系的重要指标。本文通过构建经济区内部平均交通时距以及区内外综合可达性指标,借助Arc GIS等有关分析工具,对海峡西岸经济区的综合交通体系在2001年、2006年、2011年不同时间断面上的地域空间特征进行了分析比较,总结出"海峡西岸经济区"战略规划实施以来区域综合交通体系演变特征与演进态势,并对未来海西经济区综合交通发展提出若干建议。     

Source provenance of obsidian artifacts from the Early Stone Age (ESA) site of Melka Konture,Ethiopia

The source provenance of 10 Early Stone Age artifacts from the localities in Melka Konture has been determined by EDXRF. Results show that the early to mid-Pleistocene makers of the artifacts derived the raw material from a source located in their proximity, supporting the previously proposed short distance transport of raw material for the time period.     

清代皖江流域的市场基础设施建设

清代皖江流域市场的发展离不开当地市场基础设施的建设和完善。大体而言,桥梁、渡口、河道等交通设施的建设密切了市场与其腹地、本地市场与外地市场的经济联系,从而为当地市场网络的构建提供了可能;救生船、航标、消防设备等安全设施的建设为往来人员和流通货物提供最基本的安全保障;政府对市场外部治安环境的净化和牙行对市场内部交易秩序的管理为当地市场健康发展创建了良好的环境秩序。     

说 “淮汭”与 “豫章”:吴师入郢之役战争地理新探

公元前506年吴师入郢之役的战争地理过去共有三种论说。本文结合古文字资料、历史文献以及田野考察资料,重新解读“淮汭”与“豫章”两个关键地名,并以吴、楚之间的水、陆交通线为背景,重建这一战役的战争地理。吴师的进兵与退兵都是利用淮河水道,而双方的交战则是在随枣走廊之中往复。相较于过去的学说,本文的地理重构不只是立足于较为可靠的文献基础,同时展现出更为合理的空间逻辑关系。     

Out of the outhouse: The impact of place‐based policies on dwelling characteristics in Appalachia

The Appalachian Regional Commission (ARC) administers and partially funds investment projects designed to improve economic conditions in the Appalachian region, an area of persistent poverty and reduced economic opportunity in the eastern United States in and around the Appalachian mountains. Previous research on the effectiveness of ARC programs is mixed. We analyze the impact of ARC investment projects related to expanding sewerage and waste water treatment on dwelling characteristics. Results from a difference‐in‐differences model using a quasi‐experimental approach show that ARC investment projects improved access to running water, and increased sewer hookups and indoor bathrooms in dwellings.     

Spatial inequality and urban costs: Revisiting the home market effect

This paper investigates how the interactions between product differentiation, transport costs, and urban costs determine the spatial inequality in a general‐equilibrium model. We shed light on the interrelation between different definitions of home market effect (HME) in literature. While the wages in the large region are always higher, the HME in industrial distribution occurs in a limited range of parameters, implying that the HME in factor price is more pervasive. Moreover, we show that the reverse HME is the more common outcome. It indicates that neglecting urban costs in theoretical methodologies tends to overestimate the existence of HME. We also disclose how a change in urban costs or transport costs affects regional inequalities and welfare.     

Roads to Inequality: Infrastructure and Historically Grown Regional Differences in the Markham Valley,Papua New Guinea

Roads are one of the most salient symbols of development and modernity for rural citizens of Papua New Guinea (PNG). Multinational corporations, members of parliament, and villagers frequently point to roads as a key to development. However, while roads routinely improve the incomes of those connected, many of their effects are far less scrutable. Here, we examine the economic and social consequences of two roads, the Wau‐Bulolo Highway and Highlands Highway, for two villages in PNG's Morobe Province, and consider the processes that make their outcomes so different. Tracing the history of the two highways and considering a contrasting pair of case‐studies, we explore how roads simultaneously bolster income and drive interregional economic divergence. We demonstrate how the spatial and historical contexts the Highways run through, coupled with the relationships of patronage and dependence they rely on, produce contingent social outcomes and shape local ambivalence towards the outcomes of roads.     

Kisar and the Archaeology of Small Islands in the Wallacean Archipelago

The occupation of small islands presents particular challenges for people largely related to limited terrestrial resources and susceptibility to natural disasters. Nevertheless, the challenges and risks inherent in maintaining stable populations on small islands can be offset or overcome through the use of maritime technologies and exchange networks. The archaeology of Here Sorot Entapa rockshelter (HSE) on Kisar Island in the Wallacean Archipelago provides an unparalleled record for examining these issues in Southeast Asia. Kisar is the smallest of the Wallacean islands known to have a Pleistocene occupation record, and one of the smallest permanently inhabited today. Our results indicate that Here Sorot Entapa was first occupied in the terminal Pleistocene by people with advanced maritime technology who made extensive use of local marine resources and engaged in social connections with other islands through an obsidian exchange network. As a result, populations appear to have been maintained on the island for approximately 6,000 years. In the early Holocene occupation at HSE ceased for unknown reasons, and the site was not reoccupied until the mid-Holocene, during which time a major change in the lithic resources can be observed and the exchange network appears to have ceased.     

Groundwater age,brine migration,and large‐scale solute transport in the Alberta Basin,Canada

There is a great contrast in geochemical and hydrogeologic estimates of the residence times of pore fluids in sedimentary basins. This contrast is particularly evident in the Alberta Basin, Canada, which has served as the study area for important studies of long‐term fluid flow and transport. To address these differences, we developed two‐dimensional simulations of groundwater age, constrained by both hydrogeologic and geochemical observations, to estimate the residence time of fluids and the amount and timing of flushing by meteoric waters in the Alberta Basin. Results suggest that old, residual brines have been retained in the deepest parts of the basin since their formation ca. 400 Ma, but significant dilution by younger waters has reduced the age of these pore waters to no more than approximately 200 My. Shallower formations have been flushed extensively by fresh, young waters. Loss of brines and dilution of older pore waters occurred primarily after the uplift of the Rockies with the introduction of the gravity‐driven flow regime. Despite these large changes in flow regime, solute exchange between deep saline aquifers and the overlying vigorous freshwater flow system was found to be consistent with long‐term dispersive mixing across subhorizontal concentration gradients rather than by direct flushing. Sensitivity studies using an analytic solution supported the use of 100 m for transverse dispersivity in large‐scale numerical models. These simulations confirm that the age and origin of brines are in many cases poor indicators of long‐term solute transport rates in sedimentary basins, but the geochemical indicators that are used to determine the origin of brines can provide useful constraints for calculating groundwater age and are far more commonly available than isotopic groundwater age tracers.