Search results: Found 3

Listing 1 - 3 of 3
Sort by
Bogotá: nacimiento de una metrópoli : La originalidad del proceso de concentración urbana en Colombia en el siglo XX

Author:
ISBN: 9782821844872 DOI: 10.4000/books.ifea.3252 Language: Spanish
Publisher: Institut français d’études andines
Subject: Social Sciences
Added to DOAB on : 2019-12-06 13:15:32
License: OpenEdition Licence for Books

Loading...
Export citation

Choose an application

Abstract

Los procesos de concentración urbana acelerada en América Latina, de jerarquización progresiva de las redes urbanas nacionales y de metropolización, han sido ampliamente estudiados desde 1950. En particular, desde el inicio sorprendió a los investigadores la similitud con la cual casi todos los Estados de la región experimentaron una concentración de tendencia "unipolar", con supremacía cada vez más fuerte de la ciudad de mayor importancia sobre el resto de la red urbana. Se designa a este fenómeno con el término de "primacía urbana". Creado en otra época y otro lugar, el concepto de primacía urbana se adecua perfectamente a la realidad latinoamericana de los últimos 60 años, en la que la combinación del éxodo rural masivo, la explosión demográfica y la industrialización acelerada han tenido como resultado una concentración urbana particularmente rápida, con un carácter primacial muy marcado. En la actualidad, Colombia experimenta un proceso muy notorio de concentración primacial alrededor de una sola ciudad. El libro análiza el período de 1930 a principios de los años 90, que abarca dos ciclos claves de la organización del espacio colombiano. El primero es el de la cuadricefalia urbana que nace en los años 30 y finaliza entre los años 60 y 70; constituye una transición original entre la situación de atomización urbana, existente a principios de siglo, y la tendencia actua la concentración. El segundo es el de la primacía urbana de Bogotá, que ha crecido sin interrupción desde los años 60 y sigue afirmándose hoy día tal como lo podemos comprobar. El propósito de nuestro estudio es comprender por qué estos dos cielos aparentemente contradictorios han podido iniciarse en un período relativamente corto, y cómo ha sido la transición del uno al otro.

Progress in Water Footprint Assessment

Authors: --- ---
ISBN: 9783039210381 / 9783039210398 Year: Pages: 202 DOI: 10.3390/books978-3-03921-039-8 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering --- Environmental Engineering
Added to DOAB on : 2019-06-26 08:44:06
License:

Loading...
Export citation

Choose an application

Abstract

Water Footprint Assessment is a young research field that considers how freshwater use, scarcity, and pollution relate to consumption, production, and trade patterns. This book presents a wide range of studies within this new field. It is argued that collective and coordinated action - at different scale levels and along all stages of commodity supply chains - is necessary to bring about more sustainable, efficient, and equitable water use. The presented studies range from farm to catchment and country level, and show how different actors along the supply chain of final commodities can contribute to more sustainable water use in the chain.

Drinking Water Quality and Human Health

Authors: ---
ISBN: 9783038977261 Year: Pages: 374 DOI: 10.3390/books978-3-03897-727-8 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Sociology --- Social Sciences
Added to DOAB on : 2019-04-05 10:34:31
License:

Loading...
Export citation

Choose an application

Abstract

The quality of drinking water is paramount for public health. Despite important improvements in the last decades, access to safe drinking water is not universal. The World Health Organization estimates that almost 10% of the population in the world do not have access to improved drinking water sources. Among other diseases, waterborne infections cause diarrhea, which kills nearly one million people every year, mostly children under 5 years of age. On the other hand, chemical pollution is a concern in high-income countries and an increasing problem in low- and middle-income countries. Exposure to chemicals in drinking water may lead to a range of chronic non-communicable diseases (e.g., cancer, cardiovascular disease), adverse reproductive outcomes, and effects on children’s health (e.g., neurodevelopment), among other health effects. Although drinking water quality is regulated and monitored in many countries, increasing knowledge leads to the need for reviewing standards and guidelines on a nearly permanent basis, both for regulated and newly identified contaminants. Drinking water standards are mostly based on animal toxicity data, and more robust epidemiologic studies with accurate exposure assessment are needed. The current risk assessment paradigm dealing mostly with one-by-one chemicals dismisses the potential synergisms or interactions from exposures to mixtures of contaminants, particularly at the low-exposure range. Thus, evidence is needed on exposure and health effects of mixtures of contaminants in drinking water. Finally, water stress and water quality problems are expected to increase in the coming years due to climate change and increasing water demand by population growth, and new evidence is needed to design appropriate adaptation policies.This Special Issue of International Journal of Environmental Research and Public Health (IJERPH) focuses on the current state of knowledge on the links between drinking water quality and human health.

Keywords

Vibrio pathogens --- rural water resources --- public health --- sub-Saharan Africa --- diarrhoeal disease --- HWTS implementation --- water and sanitation --- drinking water guidance --- infant exposure --- chemical risk assessment --- duration extrapolation --- acute gastroenteritis --- risk --- tap water --- time series study --- turbidity --- urban area --- water operation data --- THMs --- cancer --- effect measure modification --- drinking water --- drinking water --- exposure assessment --- sodium --- potassium --- magnesium --- calcium --- spatial variations --- Denmark --- water safety plans --- drinking water quality --- risk management --- impact assessment --- Asia-Pacific region --- diarrhea --- fever --- cough --- Nigeria --- infant health --- drinking water --- inorganic manganese --- health-based guideline --- infants --- pharmaceuticals --- human health --- environment --- drug labels --- screening method --- LTD --- uncertainty factors --- risk assessment --- risk context --- biomonitoring --- dental health --- drinking water --- fluoride --- pharmacokinetic modeling --- waterborne disease outbreak --- simulation study --- health insurance data --- space–time detection --- drinking water --- nitrate --- cancer --- adverse reproductive outcomes --- methemoglobinemia --- thyroid disease --- endogenous nitrosation --- N-nitroso compounds --- E. coli --- monitoring --- drinking water --- water safety plan --- sanitary inspection --- gravity-fed piped water scheme --- risk management --- chlorination by-product --- France --- environmental exposure --- organic matter --- tap water --- trihalomethanes --- private wells --- groundwater --- drinking water --- animal feeding operation --- fecal coliforms --- enterococci --- E. coli --- Maryland --- nitrite --- disinfection by-product --- drinking water distribution systems --- seasonality --- atrazine --- community water system --- low birth weight --- preterm birth --- small for gestational age --- water contamination --- endocrine disruptor --- drinking water --- radioactivity --- annual effective dose --- carcinogenic --- chronic kidney disease --- end-stage renal disease --- water contaminants --- zinc --- ammonia --- chemical oxygen demand --- dissolved oxygen --- arsenic

Listing 1 - 3 of 3
Sort by