Analysis of the spatial variation of Pb in the water-level-fluctuating zone of Xiao River based on GIS mapping techniques

Author(s):  
Junjie Lin ◽  
Jie Pan ◽  
Chuan Fu ◽  
Jinsong Guo ◽  
Fang Fang
2006 ◽  
Vol 18 (4) ◽  
pp. 561-572 ◽  
Author(s):  
L. Brabyn ◽  
C. Beard ◽  
R.D. Seppelt ◽  
E.D. Rudolph ◽  
R. Türk ◽  
...  

This paper reports on the remapping of a carefully documented vegetation plot at Cape Hallett (72°19′S 170°16′E) to provide an assessment of the rates of vegetation change over decadal time scales. E.D. Rudolph, in 1962, mapped in detail the vegetation of a site approximately 28 m by 120 m at Cape Hallett, Victoria Land, Antarctica. This site was relocated and remapped in January 2004 and changes were assessed using GIS techniques. This appears to be the longest available time period for assessing vegetation change in Antarctica. The analysis indicated that considerable change had occurred in moss and algae distribution patterns and this seems to have been caused by increased water supply, particularly in wetter areas. There was also evidence of some change in lichen distribution. The extent of the change indicates that vegetation cover can be used for monitoring change in areas as extreme as the Ross Sea region. For this analysis to be successful it was important that the mapping techniques used were totally explicit and could easily be replicated. Fortunately, Rudolph had defined his cover classes and the site was also clearly marked. The application of GIS mapping techniques allows the mapping to be more explicitly defined and easily replicated.


Author(s):  
Gergely Baics

New York City witnessed unparalleled growth in the first half of the nineteenth century, its population rising from thirty thousand people to nearly a million in a matter of decades. This book looks at how America's first metropolis grappled with the challenge of provisioning its inhabitants. It tells the story of how access to food, once a public good, became a private matter left to free and unregulated markets—and of the profound consequences this had for American living standards and urban development. Taking readers from the early republic to the Civil War, the book explores the changing dynamics of urban governance, market forces, and the built environment that defined New Yorkers' experiences of supplying their households. It paints a vibrant portrait of the public debates that propelled New York from a tightly regulated public market to a free-market system of provisioning, and shows how deregulation had its social costs and benefits. Using cutting-edge GIS mapping techniques the book reconstructs New York's changing food landscapes over half a century, following residents into neighborhood public markets, meat shops, and groceries across the city's expanding territory. The book lays bare how unequal access to adequate and healthy food supplies led to an increasingly differentiated urban environment. A blend of economic, social, and geographic history, the book traces how this highly fragmented geography of food access became a defining and enduring feature of the American city.


2006 ◽  
Vol 13 (1) ◽  
pp. 1-20 ◽  
Author(s):  
Penelope M. Allison

Artefacts from military bases of the early Roman Empire potentially indicate not only the presence of women and children inside the walls, but also their movements, activities and impact on fort life. This paper explores dynamic approaches to categorizing and gendering artefacts for more holistic investigations of artefact assemblages. It uses GIS mapping techniques to analyse the distribution patterns of ‘gendered’ artefacts within three forts on the German frontier – Vetera I, Ellingen and Oberstimm. It investigates the social significance of these patterns within and between the forts to better understand women's place in this sphere.


1996 ◽  
Vol 17 (1) ◽  
pp. 1-35 ◽  
Author(s):  
Dan F. Morse ◽  
Phyllis A. Morse

The status of archaeological research is summarized since the publication of Archaeology of the Central Mississippi Valley in 1983. Extensive research dealing with the Paleoindian period and the Pleistocene-Holocene transition has been completed. Fluted points have been found in association with the remains of megafauna, remains of a Paleolama date the extinction of megafauna in the region, and human bone has been identified from the Dalton cemetery at the Sloan site. Plant domestication is believed to have been initiated between 3000–2000 B.C., although corn agriculture is not seen until the Mississippian developments of the ninth century A.D. The route of the 1541–42 DeSoto expedition through the area and associated archaeology has been refined. Extensive work has also been done with Colonial Period sites, especially those of the seventeenth century. New GIS mapping techniques and microwear analyses are enhancing current interpretations of regional archaeology.


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