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Selected AbstractsThe use of GIS-based digital morphometric techniques in the study of cockpit karstEARTH SURFACE PROCESSES AND LANDFORMS, Issue 2 2007P. Lyew-Ayee Abstract Cockpit karst landscapes are among the most distinctive landscapes in the world, and have been the focus of long-standing scientific interest. Early researchers used largely descriptive techniques to categorize the terrain, and subsequent work has not attempted to critically re-evaluate descriptions of landscapes using more sophisticated methods. The distinctive surface topography of cockpit karst areas can be characterized in order to compare them with other karst as well as non-karst areas, and to determine geological and/or climatic conditions that are responsible for the observed terrain. Process models of the rate of karst denudation or evolution can only be accurate if the contemporary morphology of the landscape is quantitatively and unambiguously defined. A detailed analysis of cockpit karst terrain is carried out using the latest GIS-based digital morphometric techniques in order to assess the nature of such terrain and provide further information for subsequent modelling, as well as other non-geomorphological applications, such as environmental management and conservation issues. The paper presents the methodology used for the digital analysis of terrain and landforms in the distinctive Cockpit Country area of Jamaica and its environs. The results indicate that cockpit karst may be categorized based on its vertical, horizontal and shape characteristics, as well as by looking at the semivariogram, slope characteristics, and landscape relief scale, which combine measures of vertical and horizontal scales. Copyright © 2006 John Wiley & Sons, Ltd. [source] Hydrologic Modeling of an Extreme Flood in the Guadalupe River in Texas,JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION, Issue 5 2010Hatim O. Sharif Sharif, Hatim O., Almoutaz A. Hassan, Sazzad Bin-Shafique, Hongjie Xie, and Jon Zeitler, 2010. Hydrologic Modeling of an Extreme Flood in the Guadalupe River in Texas. Journal of the American Water Resources Association (JAWRA) 1-11. DOI: 10.1111/j.1752-1688.2010.00459.x Abstract:, Many of the storms creating the greatest rainfall depths in Texas, measured over durations ranging from one minute to 48 hours, have occurred in the Texas Hill Country area. The upstream portion of the Guadalupe River Basin, located in the Texas Hill Country, is susceptible to flooding and rapid runoff due to thin soils, exposed bedrock, and sparse vegetation, in addition to the Balcones Escarpment uplift contributing to precipitation enhancement. In November 2004, a moist air mass from the Gulf of Mexico combined with moist air from the Pacific Ocean resulted in the wettest November in Texas since 1895. Although the peak discharges were not the highest on record, the U.S. Geological Survey (USGS) stream gauge on the Guadalupe River at Gonzales, Texas reported a daily mean discharge of 2,304 m3/s on November 23, 2004 (average discharge is 53 m3/s). In this paper, we examine the meteorological conditions that led to this event and apply a two-dimensional, physically based, distributed-parameter hydrologic model to simulate the response of a portion of the basin during this event. The study results clearly demonstrate the ability of physically based, distributed-parameter simulations, driven by operational radar rainfall products, to adequately model the cumulative effect of two rainfall events and route inflows from three upstream watersheds without the need for significant calibration. [source] The value of georeferenced collection records for predicting patterns of mosquito species richness and endemism in the NeotropicsECOLOGICAL ENTOMOLOGY, Issue 1 2008DESMOND H. FOLEY Abstract 1.,Determining large-scale distribution patterns for mosquitoes could advance knowledge of global mosquito biogeography and inform decisions about where mosquito inventory needs are greatest. 2.,Over 43 000 georeferenced records are presented of identified and vouchered mosquitoes from collections undertaken between 1899 and 1982, from 1853 locations in 42 countries throughout the Neotropics. Of 492 species in the data set, 23% were only recorded from one location, and Anopheles albimanus Wiedemann is the most common species. 3.,A linear log,log species,area relationship was found for mosquito species number and country area. Chile had the lowest relative density of species and Trinidad-Tobago the highest, followed by Panama and French Guiana. 4.,The potential distribution of species was predicted using an Ecological Niche Modelling (ENM) approach. Anopheles species had the largest predicted species ranges, whereas species of Deinocerites and Wyeomyia had the smallest. 5.,Species richness was estimated for 1° grids and by summing predicted presence of species from ENM. These methods both showed areas of high species richness in French Guiana, Panama, Trinidad-Tobago, and Colombia. Potential hotspots in endemicity included unsampled areas in Panama, French Guiana, Colombia, Belize, Venezuela, and Brazil. 6.,Argentina, The Bahamas, Bermuda, Bolivia, Cuba, and Peru were the most under-represented countries in the database compared with known country species occurrence data. Analysis of species accumulation curves suggested patchiness in the distribution of data points, which may affect estimates of species richness. 7.,The data set is a first step towards the development of a global-scale repository of georeferenced mosquito collection records. [source] Elderly people's perspectives on health and well-being in rural communities in England: findings from the evaluation of the National Service Framework for Older PeopleHEALTH & SOCIAL CARE IN THE COMMUNITY, Issue 5 2008Jill Manthorpe MA Abstract Addressing the problems of meeting the needs of ageing populations in rural areas is recognised as a political and service delivery challenge. The National Service Framework (NSF) for Older People (NSFOP) set out a series of service standards to raise quality, to redress variations in service use and to enhance the effectiveness of services across health and social care in England and alluded to the challenges of meeting such standards in rural communities. This paper reports findings from the consultations undertaken with 713 elderly people as part of the midpoint review of the NSFOP in 2006, presenting and analysing the views and experiences of elderly people from rural areas. The consultations to engage with elderly people employed a mixed methodology that included public events, focus groups and individual interviews. The data reveal participants' views of how different patterns of social change in diverse country areas in England influence health and well-being in later life. The costs and benefits of centralization of services, and the pivotal issue of transport are important themes. The findings raise questions about the unclear and contradictory usages of the term ,rural' in England and the portrayal of rural ageing as a homogeneous experience. [source] Profile of occupational therapy practice in rural and remote South AustraliaAUSTRALIAN JOURNAL OF RURAL HEALTH, Issue 5 2008Kobie Boshoff Abstract Objective:,The aim of this report is to discuss the results of a questionnaire conducted with occupational therapists providing services in rural and remote South Australia. It is envisaged that the results will be of interest to health professionals working in country areas of Australia. The questionnaire aimed at capturing descriptive information from these therapists in regards to the type of services they deliver and the strategies they employ to deliver services, including information on human resources and staff retention. Design and methods:,A questionnaire sent to occupational therapy managers and yielded a 44% response rate. Results:,Results provide descriptive information on the services provided, for example, the vast geographical areas covered. Respondents described the challenges they face in service delivery and these include the wide range of services to diverse client groups, high client,therapist ratio and limited human resources. Examples of strategies used are less labour-intensive service delivery models, multi-skilling of staff, networking and use of problem-solving techniques. Most perceived their services to be addressing client needs and they felt supported in their roles by other occupational therapists and their organisations. Conclusions:,Occupational therapists working in rural and remote South Australia are overcoming the challenges identified in this questionnaire by implementing innovative strategies. [source] | ||||||||||