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PubMed1983

Beyond decentralization: the evolution of population distribution in England and Wales, 1961-1981.

"Using preliminary figures from the 1981 Census, this paper details recent population shifts at a variety of areal scales in England and Wales. It compares trends in the 1971-1981 period with those in the previous decade and assesses the relative contributions of net migration and natural change. Within its broad descriptive objectives, the paper considers whether England and Wales has kept abreast of patterns of counter-urbanization that have been claimed for other industrialized nations." The authors propose some definitions for various terms, including decentralization, deconcentration, and counter-urbanization. "The conclusion is drawn that even if the postulated international continuum of changes ranging from urbanization through to counter-urbanization is valid, the limited geographical size of England and Wales will preclude this country from reaching the final stages of such a model. Finally, some policy implications which stem from the recent population redistributions are introduced and some themes for future research are considered."

Demography↗
PubMed1989

The Soviet Far East: a report on urban and rural settlement and population change, 1966-1989.

"This article provides a general overview of trends in urban-rural population change and evolution of the settlement system in the Soviet Far East since 1966, incorporating data published in the recent national statistical yearbooks and the preliminary 1989 census report....Total population in the Soviet Far East increased from 5,435,000 in 1966 to 7,941,000 by January 12, 1989, with the share of the urban population now comprising over three-quarters of the total. Migration patterns into and out of the region are discussed and cities planned for expansion are identified."

Demography↗
PubMedDate not supplied

Impact of migration on fertility in sub-Saharan Africa.

Much lower levels of fertility in urban than rural areas throughout sub-Saharan Africa imply that fertility decline in the region may be facilitated by rapid urbanization and rural-to-urban migration. The present study uses data from Demographic and Health Surveys in six countries--Ghana, Kenya, Mali, Senegal, Togo and Uganda--to assess the impact of long-term rural-urban female migration on fertility. Results of logit analyses indicate that in most countries women who leave the countryside represent the higher fertility segment of the rural population in the years before migration. Migrants' risk of conception declines dramatically in all countries around the time of migration and remains lower in the long run among most migrant groups than among rural and urban nonmigrants. Descriptive analyses suggest that the decline in migrant fertility is related to the rapid and pronounced improvement in standard of living experienced by migrants after settling in the urban area and may be due in part to temporary spousal separation.

Africa South of the Sahara↗
PubMed1987

Ways of improving settlement in West Siberia.

"[This] paper devoted to the settlement system and the problem of rural population loss in that portion of West Siberia having a significant agricultural base takes issue with some implicit assumptions incorporated within the General Scheme of Settlement within the USSR. More specifically, policies calling for the deliberate, i.e., forced, resettlement of rural population in selected villages in order to provide economies of scale in rural services provision are criticized on two major counts: (1) that such 'enlarged' settlements will still be too small to be allocated the necessary range of functions according to standard city-planning formulae, and (2) that they accelerate rural depopulation by serving as spring-boards for migration to still larger centers."

Demography↗
PubMed1997

Response of health systems to urbanization in developing countries.

Equity in access to health care is now accepted as a basic ethical principle for health development. The glaring inequalities in health suffered by poor people living in slums are a strong justification for urgent action. The problem is rapidly increasing.

Developing Countries↗
PubMed2000

Developing an interactive STD-prevention program for youth: lessons from a north Indian slum.

An intervention developed to teach young men in the urban slums of Lucknow, India, about sexually transmitted diseases is described in detail. This community-based intervention was designed to impart core educational messages and to address preexisting ideas about sexual health and STD-prevention practices among participants. Indicators of knowledge recorded before and after the intervention are presented and evaluated against the scores of a control group. Levels of sexual activity and factors associated with risky sex are discussed. The intervention was successful in raising the young men's awareness of STDs significantly in all areas except for the length of time that symptoms take to manifest following risky sex and the ineffectiveness of washing one's genitals after sex to avoid acquiring STDs. Lessons learned during the intervention are described as a means of informing future STD-education programs, and issues requiring prompt attention are identified.

Adolescent↗
PubMed1989

Parasitic, bacterial and viral pathogens isolated from diarrhoeal and routine stool specimens of urban Bangladeshi children.

Few data exist in Bangladesh on longitudinal, community-based studies of bacterial or parasitic pathogens identified in routine and diarrhoeal stools of urban dwelling children. We undertook the following study on 343 children of age less than 6 years who resided in one of 51 slum settings in Dhaka, Bangladesh, between October 1984 and February 1986. Specimens from diarrhoeal episodes and from routine stools obtained at 3-monthly intervals were examined for parasites, rotavirus and pathogenic bacteria. Parasites were isolated from 509 (51%) of the 1006 routine stools and from 95 (42%) of the 225 diarrhoeal stools. Isolation rates steadily increased with age. Ascaris lumbricoides and Trichuris trichiura accounted for approximately 80% of all parasitic isolates in routine and diarrhoeal stools. Giardia lamblia was isolated from 11% diarrhoeal stools. Entamoeba histolytica was an uncommon isolate (less than 1%). Bacterial pathogens were identified in 55 (24%) of the diarrhoeal stools but were identified in only 164 (16%) of the 1028 routine stools examined (P less than 0.01). Toxigenic Escherichia coli, Shigellae and Campylobacter were the most frequent isolates from diarrhoeal and routine specimens. This pathogen profile appears to be more in keeping with that from urban settings in other developing countries than from rural Bangladesh, suggesting that extrapolations from rural-based data should not be made for urban settings.

Age Factors↗
PubMed1997

Housing and environmental factors and their effects on the health of children in the slums of Karachi, Pakistan.

To examine the association of environmental factors (including housing) with respiratory infections and diarrhoea in children under 5 years of age, a cross-sectional study of 403 families was conducted in a squatter settlement of Karachi. In the 2-week period before the survey prevalence of diarrhoea and respiratory infections was 14.4% and 15.0% respectively. The factors significantly associated (p < 0.05) with diarrhoea in households in the multivariate analysis were: number of children under 5, regular cleaning of sewers, storage of water in small utensils and cooking inside a one room house. Five households risk factors were identified for respiratory infections: the number of children under 5, poor housing structure, increased household density, humidity inside the house less than the humidity outside house, and frequent cooking inside the house. These results suggest that children under 5 years of age in lower income areas are at additional risk to health because of poor environmental conditions.

Child Welfare↗
PubMed2000

Diphtheria in urban slums in north India.

We recorded a reappearance of cases of microbiologically confirmed diphtheria in a tertiary care hospital in north India. Poor immunisation coverage, population migrations, and overcrowded urban slums may be contributory factors.

Child↗
PubMed2004

Spatial distribution of pollution in an urban stormwater infiltration basin.

Infiltration basins are frequently used for stormwater drainage. Because stormwater is polluted in highly toxic compounds, assessment of pollution retention by infiltration basins is necessary. Indeed, if basins are not effective in trapping pollution, deep soil and groundwater may be contaminated. This study's objective is to investigate soil pollution in infiltration basins: spatial distribution of soil pollution, optimisation of the number of soil samples and a contamination indicator are presented. It is part of a global project on long-term impact of stormwater infiltration on groundwater. Soil sampling was done on a basin in suburban Lyon (France). Samples were collected at different depths and analysed for nutrients, heavy metals, hydrocarbons and grain size. Pollutant concentrations decrease rapidly with depth while pH, mineralisation and grain size increase. Sustainable metal concentrations are reached at a 30-cm depth, even after 14 years of operation; hydrocarbon pollution is deeper. Principal component analysis shows how pollutants affect each level. The topsoil is different from other levels. Three specifically located points are enough to estimate the mass of pollution trapped by the basin with a 26% error. The proposed contamination indicator is calculated using either average level concentrations or maximum level concentrations. In both cases, the topsoil layer appears polluted but evaluation of lower levels is dependent on the choice of input concentrations.

Cities↗
PubMed1985

City-size distribution and the size of urban systems.

"This paper is an analysis of the city-size distribution for thirty-five countries of the world in 1975; the purpose is to explain statistically the regularity of the rank-size distribution by the number of cities included in the urban systems. The rank-size parameters have been computed for each country and also for four large urban systems in which several population thresholds have been defined. These thresholds seem to have more influence than the number of cities included in the urban system on the regularity of the distribution." The data are from the U.N. Demographic Yearbook.

Demography↗
PubMed1995

In search of counterurbanisation: some evidence from Devon on the relationship between patterns of migration and motivation.

"The term counterurbanisation is frequently used to describe the redistribution of a population away from major cities and metropolitan areas and towards more rural areas. The widespread nature of this phenomenon has attracted much attention, yet the concept remains relatively under-developed, and even the basic definition lacks rigour. It is not surprising, therefore, that there has been a lack of cumulative evidence as to the extent of the process and little agreement as to its significance. In essence, ambiguity surrounds the types of movement that should be admitted, the necessary motives for movement and the appropriate measures for both. This paper offers some preliminary suggestions for a more structured approach to the problem. It draws on original survey data from Devon [England], a county which has experienced substantial net in-migration, both to examine the contribution of three alternative definitions of counterurbanisation and to consider how these issues relate to motivation."

Behavior↗