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Registros recuperados: 61
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Croissance urbaine et inondations à Lomé : Réflexion sur les facteurs responsables et les perspectives d'avenir. OceanDocs
Klassou, K.S..
Cette étude, qui évoque l'idée d'un lien entre la croissance urbaine de Lomé et celle de redoutables inondations, veut mettre l'accent sur les facteurs responsables de la submersion saisonnière de la ville. Le travail visé particulièrement à préciser l'impact conjugué de l'hétérogénéité morphologique du site, de la concentration excessive des pluies, mais aussi des responsabilités humaines dans la survenance des inondations.
Tipo: Proceedings Paper Palavras-chave: Floods; Urbanization; Http://aims.fao.org/aos/agrovoc/c_8088.
Ano: 1998 URL: http://hdl.handle.net/1834/1230
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Water quality trends and input loads to Lake Nakuru OceanDocs
Kulecho, Andrew; Muhandiki, Victor.
Water quality trends of Lake Nakuru, Kenya and its feeder streams were monitored in 2001-2004. Water samples were obtained from eleven stations in the lake and five points on inflowing streams. The items monitored were physico-chemical and biological components. The drainage basin was characterized by recurrence of dry spells throughout the period with water losses in the lake exceeding the amount received to cause a fall in water volume. The lake water salts content rose – conductivity and alkalinity reached 58 ms/cm and 5,200 mg/l respectively. PH was more or less constant (10.00 – 10.36). Daytime oxygen concentration in the mid-lake system rose (to greater than 20 mg/l) while remaining low in the inflow portions of the lake. On one occasion, the lake...
Tipo: Proceedings Paper Palavras-chave: Water quality; Biomass; Mortality causes; Anthropogenic factors; Phytoplankton; Pollution effects; Degradation; Man-induced effects; Inland waters; Freshwater pollution; Physicochemical properties; Inflow; Environmental monitoring; Land use; Urbanization; Environmental impact; Pollution; Freshwater.
Ano: 2006 URL: http://hdl.handle.net/1834/5312
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Les mécanismes de la péri-urbanisation à Lomé dans les années 1970 OceanDocs
Le Bris, E..
La "péri-urbanisation" est-elle en train de ... la ville, au Sud comme au Nord? Est elle au contraire en train de faire apparaître des "nouveax de centralité périphérique" compatables à la ville mère ?
Tipo: Proceedings Paper Palavras-chave: Urbanization; Http://aims.fao.org/aos/agrovoc/c_8088.
Ano: 1998 URL: http://hdl.handle.net/1834/1201
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Effects of land use changes on bird composition along River Njoro: A watershed of Lake Nakuru OceanDocs
Shivoga, W.A.; Ngugi, F.M.; Muchiri, M.S.; Miller, S.N..
The rift valley lakes and their associated watersheds are home for millions of resident and migratory waterfowl. However, they have been recently challenged by land use changes. Lake Nakuru (Kenya) supports diverse biological resources of global, regional and national importance. It is saline and River Njoro is its main source of freshwater. Deforestation, cultivation and urbanization in vital watershed areas have altered the hydrological regime of River Njoro. There is need to preserve and restore aquatic, riparian and terrestrial biological diversity in the watershed to be able to restore and maintain ecological health of Lake Nakuru. The impact of these recent land use changes on birds in the River Njoro Watershed is of concern to conservationists. This...
Tipo: Proceedings Paper Palavras-chave: Land use; Aquatic birds; Urbanization; Resource conservation; Resource management; Migratory species; Environment management; Protected resources; Watersheds; Lake basins; Inland waters; Environmental effects; Species diversity; Riparian environments; Aquatic birds; Urbanization; Resource conservation; Resource management; Http://aims.fao.org/aos/agrovoc/c_8898; Http://aims.fao.org/aos/agrovoc/c_8088; Http://aims.fao.org/aos/agrovoc/c_6523; Http://aims.fao.org/aos/agrovoc/c_6524.
Ano: 2006 URL: http://hdl.handle.net/1834/1499
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CDM Potential for Rural Transition in China Case Study: Options in Yinzhou District, Zhejiang Province AgEcon
Zhao, Xingshu; Michaelowa, Axel.
This paper aims to examine the potential of the Clean Development Mechanism (CDM) to address energy- related issues during the rural transition process in China, using a case study of quickly urbanizing and industrializing Yinzhou district in coastal Zhejiang province. Yinzhou's per capita GDP reached US$ 3100 in 2002, three times China's average, and is targeted to achieve $10,000 in 2020. We assess the current energy status of Yinzhou, and provide projections of energy consumption and CO2 emissions up to the year 2020. Energy resource shortages and limited possibilities to obtain coal-fired electricity from national grid illustrate the opening gap between energy supply and demand. We find that Yinzhou's CDM potential is concentrated in efficiency...
Tipo: Working or Discussion Paper Palavras-chave: Clean Development Mechanism; China; Urbanization; Energy efficiency; Environmental Economics and Policy; Q 540; Q 580.
Ano: 2004 URL: http://purl.umn.edu/26152
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LOCATIONAL EFFECTS OF URBANIZATION ON AGRICULTURE IN SOUTHEASTERN PENNSYLVANIA AgEcon
Larson, Janelle M.; Findeis, Jill L.; Smith, Stephen M..
Most agricultural output in the northeastern United States comes from counties that have experienced significant development. A mail survey, with 300 responses, was conducted in southeastern Pennsylvania to determine farmer adaptation to urbanization in this region. Despite development, traditional agriculture still predominates. Changes in land use were examined using multinomial logit models. Results show that changes in population density and farm preservation policies have an influence, as increased population density reduced total land operated and having land in an agricultural security area increased it. Other measures of urbanization, such as proximity to a city or inter-state highway had no statistically significant effect on farm practices....
Tipo: Conference Paper or Presentation Palavras-chave: Agricultural adaptation; Rural development; Off-farm income; Urbanization; Land use; Land Economics/Use.
Ano: 2000 URL: http://purl.umn.edu/21885
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Urbanization, Educational Expansion, and Expenditures Inequality in Indonesia in 1996, 1999, and 2002 AgEcon
Akita, Takahiro; Miyata, Sachiko.
This paper considers urban-rural location and education as the main causes of expenditure inequality and attempts to examine inequality changes associated with urbanization and educational expansion in Indonesia from 1996 to 2002, using Indonesian monthly household consumption expenditure data. It introduces a hierarchical framework of inequality decomposition by population subgroups, which enables researchers to analyze inequality resulting from differences in educational attainment as well as inequality within each educational group, after the effects on inequality of urban– rural differences in the composition of educational attainments are removed. It finds that the urban sector’s higher educational group contributes significantly to overall...
Tipo: Working or Discussion Paper Palavras-chave: Expenditure Inequality; Urbanization; Educational Expansion; Indonesia; Theil Index; Two-stage Nested Inequality Decomposition Analysis; Labor and Human Capital.
Ano: 2007 URL: http://purl.umn.edu/42371
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How Fast Do Urban Migrants Change Their Diets? AgEcon
Gibson, John.
Rapid urbanization is a major cause of structural change in food demand. In West Africa, urbanization is associated with a switch from coarse grains to rice and wheat, in Melanesia the switch is from root crops to rice and wheat, while in much of Asia the switch is away from cereals (and within cereals to wheat). Although reasons why urban diets differ from traditional rural diets are well known, the rate at which recent arrivals from the countryside switch their diet has not been estimated. Evidence on the speed of this dietary change can help to show whether studies of urban food demand need to control for cohort effects and may also help producers forecast the size of their future urban markets. This paper uses cross-sectional household survey data from...
Tipo: Presentation Palavras-chave: Food demand; Migration; Urbanization; Food Consumption/Nutrition/Food Safety; D12; O15.
Ano: 1999 URL: http://purl.umn.edu/123806
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Land-losing Farmers’ Citizenization in the Process of Urbanization AgEcon
Qu, Xiao-juan.
Starting from the status of citizenization of land-losing farmers, problems in the citizenization are analyzed, such as the difficulty in land-losing farmers’ economic life after turning into citizens, employment difficulties of land-losing farmers after living in the city, and the prominent problems in social security of land-losing farmers. Causations for the citizenization problems of land-losing farmers are analyzed. Firstly, institutionalized rejection is the root of the obstacle in citizenization of land-losing farmers. Secondly, exclusion from social security system is a fundamental reason. Thirdly, exclusion of land-losing farmers from both urban citizens and themselves is the subjective factor. Fourthly, exclusion of land-losing farmers from urban...
Tipo: Journal Article Palavras-chave: Land-losing farmer; Citizenization; Social security; Urbanization; China; Agribusiness.
Ano: 2011 URL: http://purl.umn.edu/113219
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Feeding the Cities and Greenhouse Gas Emissions - Beyond the Food Miles Approach AgEcon
de Cara, Stephane; Fournier, Anne; Gaigne, Carl.
In this paper, we study the impact of urbanization on the location of agricultural production and the GHG emissions related to transportation activities. We develop an economic geography model where the location of agricultural activities and urban population are endogenous. We show that increasing agricultural yields induce the spatial concentration of agricultural production in the least urbanized region if agricultural transport costs are relatively low and in the most urbanized region otherwise. In addition, interregional trade in agricultural commodities is desirable to reduce GHG emissions, except when urban population is equally split between cities. However, the market may induce too much agglomeration of agricultural production when yields are...
Tipo: Conference Paper or Presentation Palavras-chave: Urbanization; Agriculture location; Transport; Environmental Economics and Policy; Food Security and Poverty; Q10; Q54; R12.
Ano: 2011 URL: http://purl.umn.edu/114350
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Geography and Economic Transition: Global Spatial Analysis at the Grid Cell Level AgEcon
Motamed, Mesbah J.; Florax, Raymond J.G.M.; Masters, William J..
This paper addresses the timing of historical transition from rural to urban activity. In our model, rural production has constant returns and meets subsistence needs, while urban production has scale economies and meets the demands of higher-income consumers. Urbanization occurs sooner when rural or urban productivity is higher or transport costs are lower. We test the model on worldwide data that divides the earth's surface at half-degree intervals into over 60,000 cells. From an independent estimate of each cell's rural and urban population history, we identify the date at which each cell achieves various thresholds of urbanization. Controlling for country fixed effects and neighbors' urbanization using spatial techniques, we find that the date at which...
Tipo: Conference Paper or Presentation Palavras-chave: Economic growth; Economic geography; Urbanization; Agriculture; Community/Rural/Urban Development; Research Methods/ Statistical Methods; C21; N50; O11; O18; R1.
Ano: 2009 URL: http://purl.umn.edu/49589
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Analysis of the Price of Development Right of Agricultural Land in China AgEcon
Sun, Nan; Chen, Shuhui.
According to the viewpoints of predecessors, we define the signification of development right of agricultural land and connotation of the price of development right of agricultural land as follows, the development right of agricultural land is to change the former use nature of agricultural land, so as to become the right of construction Use land; the price of development right of agricultural land refers to the price that is difference between the price of construction use land, and summation of the price of former agricultural land. the expense of developing agricultural land, the expense of management, and profit, after the agricultural land is transformed into non-agricultural construction use land. By using the principle of economics of land, this...
Tipo: Journal Article Palavras-chave: Urbanization; Development right of agricultural land; The price of development right of agricultural land; China; Agribusiness.
Ano: 2011 URL: http://purl.umn.edu/118287
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Innovative approaches to agricultural water use for improving food security in Sub-Saharan Africa AgEcon
Inocencio, Arlene; Sally, Hilmy; Merrey, Douglas J..
Tipo: Working or Discussion Paper Palavras-chave: Irrigated farming; Water use; Food security; Water resources; Water supply; Rain; Water harvesting; Wetlands; Food production; Groundwater management; Urbanization; Recycling; Effluents; Waste waters; Water reuse; Water demand; Crop production; Crop Production/Industries; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Resource /Energy Economics and Policy.
Ano: 2002 URL: http://purl.umn.edu/92701
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Expansion Strategy of Agricultural Industrial Chain of Suburban Villages and Towns in the Process of Urbanization - A Case Study of Yongle Town in Nanming District of Guiyano City AgEcon
Zhu, Li; Zhu, Jing.
On the basis of introducing the connotation of agricultural industrial chain, taking Yongle Town in Nanming District of Guiyang City as an example, this paper analyzes me advantages and constraint factors of the suburban villages and towns in the process of expanding agricultural industrial chain in the context of urbanization. Corresponding strategies of expanding the agricultural industrial chain of Yongle Town in the process of urbanization as follows, vigorously develop the leading enterprises; strengthen the construction of farmers' specialized cooperatives and agricultural associations: build and perfect agricultural industrial chain organizations: set up the public information platform; rely on the food industrial Dark to propel the deep processing...
Tipo: Journal Article Palavras-chave: Urbanization; Suburban villages and towns; Income increase of farmers; Expansion of agricultural industry chain; China; Agribusiness.
Ano: 2011 URL: http://purl.umn.edu/118311
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The Impact of Urbanization on CO2 Emissions: Evidence from Developing Countries AgEcon
Martinez-Zarzoso, Inmaculada.
This paper analyzes the impact of urbanization on CO2 emissions in developing countries. In this study we treat population as a predictor in the model, instead of assuming a unitary elasticity of emissions with respect to population growth. We contribute to the existing literature by examining the effect of urbanization, taking into account the presence of heterogeneity in the sample of countries and testing for the stability of the estimated elasticities over time. The sample covers the period from 1975 through 2005 for different groups of countries, classified according to their income levels. Our results show that, whereas the impact of population growth on emissions is above unity and only slightly different for upper, middle, and low-income countries,...
Tipo: Working or Discussion Paper Palavras-chave: CO2 Emissions; Developing Countries; Panel Data; Population Growth; Urbanization; Q25; Q4; Q54.
Ano: 2008 URL: http://purl.umn.edu/37673
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Developing a Research and Action Agenda for Examining Urbanization and Caregiving: Examples from Southern and Eastern Africa AgEcon
Engle, Patrice L.; Menon, Purnima; Garrett, James L.; Slack, Alison.
The UNICEF-expanded model for nutrition is used to analyze the circumstances of care in urban environments. The model postulates that there are six major types of care behaviors: feeding and breast-feeding, food preparation and handling, hygiene behavior, psychosocial care, care for women, and home health practices. These behaviors require the resources of education and knowledge of the caregivers, the physical and mental health of caregivers, autonomy in decisionmaking, time availability, and the social support of the family and community in order to ensure adequate care for the child. This paper describes each of these constraints, and two of the behaviors (feeding and health care utilization) in urban and rural areas. Data from Demographic and Health...
Tipo: Working or Discussion Paper Palavras-chave: Child Feeding; Food handling; Urban health; Urbanization; Education; Research; Gender; Health and Nutrition; Education; Childcare and work; Livelihoods; Urban programming; Food Security and Poverty.
Ano: 1997 URL: http://purl.umn.edu/97296
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UK parliamentary inquiry into global food crisis: call for evidence: How to better manage water so that 9 billion people can be fed equitably, healthily, safely and sustainably by 2050 AgEcon
Chartres, Colin J..
Invited submission from the International Water Management Institute (IWMI) to the United Kingdom Parliament on 2 June 2009.
Tipo: Report Palavras-chave: Research institutes; Agricultural research; Policy; Water resource management; Irrigated farming; Rainfed farming; Farming systems; Food security; Water productivity; Water scarcity; Population growth; Water reuse; Food production; Water use; Biofuels; Urbanization; Climate change; Agricultural and Food Policy; Agricultural Finance; Community/Rural/Urban Development; Consumer/Household Economics; Crop Production/Industries; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Political Economy; Production Economics; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy.
Ano: 2009 URL: http://purl.umn.edu/91800
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Construction of Governmental Function Network Based on the Perspective of Problem of Farmers Who Lose Their Land AgEcon
Li, Cui-ping; Wang, Yu-hua.
This paper illustrates three developmental stages of the functional transformation of western governments characterized by different extent of state involvement in economic activities. It investigates the functional role of nation-state in urbanization process in the context of western advanced economies with a particular focus on the laws and regulations, delineating the subjects, objectives, operational procedure, approval system, compensation standard and so on in relation to land expropriation. It also discusses the direction of the adjustment of state functions in China along three lines, including the transformation from political government to economic government, from direct management to indirect management and from comprehensive government to...
Tipo: Journal Article Palavras-chave: Landless farmers; Urbanization; Governmental functions; Network; China; Agribusiness.
Ano: 2011 URL: http://purl.umn.edu/113421
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Spatial variation in water supply and demand across river basins of India AgEcon
Amarasinghe, Upali A.; Sharma, Bharat R.; Aloysius, Noel; Scott, Christopher A.; Smakhtin, Vladimir U.; de Fraiture, Charlotte.
India is a large country with regional differences in per-capita water supply and demand. Attempts to describe the water situation in India at a national level are often misleading due to the tremendous diversity in the water situation across the country. This Report analyzes the spatial variation of water supply and demand across river basins in India. The study identifies basins that are water-scarce because of inadequate water availability to meet the effective demand. It also identifies issues that are important for estimating the future water demand and for the formation of policy for future water-resources development and management.
Tipo: Report Palavras-chave: Water supply; Water demand; River basins; Catchment areas; Water availability; Water scarcity; Estimation; Irrigation water; Domestic water; Population growth; Urbanization; Groundwater extraction; Crop production; Policy; Water transfer; India; Agricultural and Food Policy; Community/Rural/Urban Development; Consumer/Household Economics; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Production Economics.
Ano: 2004 URL: http://purl.umn.edu/52966
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Incorporating Spatial Complexity into Economic Models of Land Markets and Land Use Change AgEcon
Chen, Yong; Irwin, Elena G.; Jayaprakash, Ciriyam.
Recent work in regional science, geography, and urban economics has advanced spatial modeling of land markets and land use by incorporating greater spatial complexity, including multiple sources of spatial heterogeneity, multiple spatial scales, and spatial dynamics. Doing so has required a move away from relying solely on analytical models to partial or full reliance on computational methods that can account for these added features of spatial complexity. In the first part of the paper, we review economic models of urban land development that have incorporated greater spatial complexity, focusing on spatial simulation models with spatial endogenous feedbacks and multiple sources of spatial heterogeneity. The second part of the paper presents a spatial...
Tipo: Article Palavras-chave: Urban growth; Urbanization; Land development; Spatial dynamics; Heterogeneity; Agent-based models; Spatial interactions; Land Economics/Use; Research Methods/ Statistical Methods.
Ano: 2011 URL: http://purl.umn.edu/120644
Registros recuperados: 61
Primeira ... 1234 ... Última
 

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