Nature and the Singapore resident   总被引：2，自引：0，他引：2  

Belinda Yuen  Lily Kong  Clive Briffett 《GeoJournal》1999,49(3):323-331

Singapore has witnessed rapid urban development in the last thirty years. Its landscape has changed from one of slums and squatters in the immediate post-war years to a city of gardens and high-rise high-density housing. The concept of a `garden city' was introduced to guide the development of a city-state with abundant greenery. In the process, many parks and gardens were created including park connectors which are green linkages between parks and other land uses. This paper presents the findings of an ongoing research into park connectors. It reports on that part of the survey results which examine the views of residents towards nature provision in park connectors and suggest some design options to enhance the planning of park connectors. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Perils of a restless planet: scientific perspectives on natural disasters by E. Zebrowski Jr,Cambridge University Press,Cambridge, 1997. no. of pages: xi+306. price: £16.95 (hb). ISBN 0-521-57374-2     

Clive Oppenheimer 《地球表面变化过程与地形》1999,24(4):377-377

  相似文献   

The dark side of the earth by Robert Muir Wood,George Allen & Unwin, 1985. No. of pages: 246. Price: £11.95 (hardback). ISBN 0 04 55033 9     

Michael J. Bishop 《Geological Journal》1986,21(4):426-427

  相似文献   

Distribution and retention of Petrolisthes armatus in a coastal plain estuary: The role of vertical movement in larval transport     

Charles E. Tilburg  Jennie E. Seay  T. Dale Bishop  Harlan L. Miller III  Christof Meile 《Estuarine, Coastal and Shelf Science》2010

Since transport of planktonic larvae is essential to the maintenance and expansion of many marine species, we examined the spatial and temporal distribution of green porcelain crab Petrolisthes armatus (Gibbes, 1850) larvae and the possible underlying physical and behavioral mechanisms using a combination of field observations and numerical modeling. The field study consisted of observations of larval abundance and distribution as well as hydrographic surveys of the Satilla River estuary on the east coast of the USA in August 2006. Larvae were found throughout the water column within the tributaries but primarily at depth in the main river. A numerical model was used to examine the effect of flow and possible larval behavior responsible for the observed distribution and the consequences for larval retention in the estuary. Model results that included downward larval movement are consistent with the field observations, supporting the hypothesis that P. armatus larvae vertically migrate within the water column, which aids in their retention within the estuary.  相似文献   

Transport and retention in an upwelling region: The role of across-shelf structure   总被引：2，自引：0，他引：2  

Moninya Roughan  Newell Garfield  John Largier  Edward Dever  Clive Dorman  Dwight Peterson  Jeff Dorman 《Deep Sea Research Part II: Topical Studies in Oceanography》2006,53(25-26):2931

The paradox of upwelling is the relationship between strong wind forcing, nutrient enrichment, and shelf productivity. Here we investigate how across-shelf structure in velocity and hydrography plays a role in the retention (inshore) and export (offshore) of particles such as nutrients, plankton and larvae. We examine the spatial structure of the coastal currents during wind-driven upwelling and relaxation on the northern Californian Shelf. The field work was conducted as part of the Wind Events and Shelf Transport (WEST) project, a 5-year NSF/CoOP-funded study of the role of wind-driven transport in shelf productivity off Bodega Bay (northern California) from 2000 to 2003. We combine shipboard velocity profiles (ADCP) and water properties from hydrographic surveys during the upwelling season to examine the mean across-shelf structure of the hydrography and velocity fields during three contrasting upwelling seasons, and throughout the upwelling-relaxation cycle. We also present results from two winter seasons that serve as contrast to the upwelling seasons.During all three upwelling seasons clear spatial structure is evident in velocity and hydrography across the shelf, exemplified by current reversals inshore and the presence of a persistent upwelling jet at the shelf break. This jet feature changes in structure and distance from the coast under different wind forcing regimes. The jet also changes from the north of our region, where it is a single narrow jet, adjacent to the coast, and to the south of our region, where it broadens and at times two jets become evident. We present observations of the California Under Current, which was observed at the outer edge of our domain during all three upwelling seasons. The observed across-shelf structure could aid both in the retention of plankton inshore during periods of upwelling followed by relaxation and in the export of plankton offshore in the upwelling jet.  相似文献   

A 3.5 ka record of paleoenvironments and human occupation at Angkor Borei,Mekong Delta,southern Cambodia     

Paul Bishop  Dan Penny  Miriam Stark  Marian Scott 《Geoarchaeology》2003,18(3):359-393

Microfossil and sedimentological data from a 3.1 m core extracted from a reservoir (baray) at the ancient Cambodian settlement of Angkor Borei in the Mekong Delta have provided a continuous record of sedimentation and paleoenvironments dating from about 2000 cal yr B.C. Palynological data indicate that for much of the cal. 1st and 2nd millennia B.C. mangroves dominated the regional vegetation, while extensively and regularly burnt grasslands dominated the local vegetation. Turbid, nutrient‐rich standing water characterized the core locality, perhaps suggesting a connection with rivers in the area. An abrupt change during the cal. 5th to 6th centuries A.D. involved a dramatic reduction in grasslands and the expansion of secondary forest or re‐growth taxa. These changes are synchronous with an abrupt decline in the concentration of microscopic charcoal particles in the sediments, and the colonization of the core locality by swamp forest plants. These changes are taken to indicate a shift in land‐use strategies or, possibly, a period of land abandonment. The age for the construction of the baray is interpreted to be in the 17th–19th centuries, but this dating remains speculative. Construction of the Angkor Borei baray exploited a preexisting body of standing water, so its construction was fundamentally different from the methods used at the Angkorian capital in northern Cambodia. © 2003 Wiley Periodicals, Inc.  相似文献   

Rough quarries,rocks and hills: John Pull and the Neolithic flint mines of Sussex     

Clive Waddington 《Geoarchaeology》2003,18(2):285-286

  相似文献