domingo, 1 de diciembre de 2013

Infografia Aguas Subterráneas













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Are Super Farms the Solution to the World’s Food Insecurity Challenge? Ten Questions You Need to Ask Yourself





Today there are 842 million who are hungry. As the global population approaches 9 billion by 2050, demand for food will keep increasing, requiring sustained improvement in agricultural productivity. Where will these productivity increases come from? For decades, small-scale family farming was widely thought to be more productive and more efficient in reducing poverty than large-scale farming. But now advocates of large-scale agriculture point to its advantages in leveraging huge investments and innovative technologies as well as its enormous export potential. Critics, however, highlight serious environmental, animal welfare, social and economic concerns, especially in the context of fragile institutions. The often outrageous conditions and devastating social impacts that “land grabs” bring about are well known, particularly in severely food-insecure countries. So, is large-scale farming—particularly the popularly known “super farms”—the solution to food demand challenges? Or is it an obstacle? Here are the 10 key questions you need to ask yourself to better understand this issue. I have tried to address them in the latest issue of Food Price Watch. 1. What is a super farm? There is no widely accepted definition of the minimum area (or livestock headcount) that a farm must have to be considered a “super” farm. Some studies use 500 hectares (ha) while others use 10,000-15,000 ha as the threshold for large-scale agriculture. For example, the median farm size in Brazil’s savannah region is around 1,000 ha, but many exceed 10,000 ha. In South Asia, a typical oil palm mill averages 10,000 ha. In Sub-Saharan Africa, some farms exceed 100,000 ha, while in the Russian Federation, some are even larger than 300,000 ha. 2. Are all super farms the same? Super farms are quite heterogeneous in terms of the capital involved (foreign, national, or mixed; private, public, or combined), property terms (lease or purchase), production model (land concentration or independent small farms) and degree and terms of integration (vertical or horizontal integration), among other criteria. What brings them together is their large scale of operations, large investment flows, and an unambiguous profit orientation. 3. Is a super farm the same as a land grab? No. Oxfam defines a land grab as an acquisition of land that involves one or more of the following circumstances: violation of human rights; affected communities did not provide free, prior, and informed consent; lack a proper assessment of social, economic, environmental impacts; lack transparent and competitive contracts; or disregard meaningful participation. There are legitimate large-scale farming operations that do not engage in these behaviors. 4. Do super farms exist only in the developing world? Super farms are not unique to the developing world. There are sprawling farms all over the world, from the United States, the United Kingdom, and Australia to middle-income countries such as Brazil, Chile and Vietnam, as well as poor and fragile countries such as the Democratic Republic of Congo, Liberia, and Sudan, to name just a few. Neither do super farms imply that investments flow exclusively from rich countries into developing countries. For example, China has engaged in large-scale farming in Africa, while also developing large farms domestically. Similarly, Brazil is exploring new deals in Mozambique in addition to farms in its savannah region. Trinidad and Tobago has been exploring the possibility of developing such activities in Guyana. 5. What are the benefits of super farms compared to small farms? For decades, small family-operated farms have been thought to be more productive than larger commercial units. Family workers typically are more motivated than hired workers, require less supervision, and have a more intimate knowledge of local conditions. Small farms are also more flexible when seasonal and annual variations require adjusting labor demand. Yet, large-scale farming can potentially provide multiple benefits. Acquiring and processing information and technology is cheaper for large farms and gaining safety, environmental, and/or product identity certification is easier. In some cases, large operations can fill gaps in public services, constructing their own port terminals for exports. They can also access international capital markets and conduct their own private research and development. 6. What problems do super farms cause? The list of potential problems is indeed large. In cases of corruption, weak land governance and institutions, investments without compensation can damage traditional users and cause inequality in land ownership. They can also generate environmental risks when they expand into tropical forests or produce uncontrolled waste disposal. There can be serious concerns regarding sanitary conditions—because agglomeration makes it easier for epidemics to spread—and on animal welfare—due to zero grazing (that is, very limited or no grazing of livestock in open fields). Land speculation also has been denounced by civil society and other stakeholders, with increasing evidence of large land acquisitions either not having resulted in action on the ground, or having been associated with inequality and resource degradation. 7. Do super farms have a positive impact on poverty and employment? Evidence has shown that small-scale and family farming can reduce poverty and increase employment. They are labor intensive and favor food security in areas of high poverty incidence. But this information should not be taken to imply that large firms do not have potential to impact poverty. Unfortunately, evidence on specific large-scale farming impacts remains scarce but it points to sizeable employment and economic opportunities, for example in Brazil, Indonesia, Liberia, Peru, and Ukraine. This is more so the case among relatively labor-intensive crops such as oil palm, sugarcane, rubber, or jatropha. What is troubling is that studies also find increases in income inequality and in social costs (for example, increased medical costs from respiratory illnesses related to increased pollution). But neither benefits nor damages should be assumed automatic or intrinsic. More evidence is needed. 8. Can super farms complement small-scale agriculture? A view typically held among international institutions is that small- and large-scale farming can coexist because they have different comparative advantages depending on land and labor abundance, functioning of institutions and property rights, and the extent of yield gaps and types of crops. A more critical view –among academics and civil society organizations– argues that large-scale farms tend to become monopolies and crowd out small farms. 9. Are super farms a solution to the increasing demand for food? The jury is still out. Simply put, more evidence is needed to form conclusions on the net economic, social, environmental, and welfare effects. It is probably equally ungrounded to hail super farms as a solution for future food security challenges as it is to rule them out on the basis of outrageous episodes of land grabs. A lot of empirical work is needed to understand their impacts and also to develop effective and enforceable responsible investments and standards. 10. Under what circumstances will super farms generate positive impacts on food security and poverty reduction? Numerous stakeholders must get involved—including governments, private sector, civil society, and the international community. Interventions should be wide ranging, ensuring the following issues are addressed: making information on land deals publicly available; prioritizing public investments on infrastructure and technology; improving competition and governance in land and agriculture markets; preventing skilled managers from going elsewhere; increasing truly participatory community tools; and designing, disseminating, implementing and monitoring responsible agro-investment principles. Note: This blog is based on evidence reported in several academic journals, reports, and strategy papers. For specific references and citations, please see the November Food Price Watch. http://blogs.worldbank.org/voices/super-farms-solution-world-food-insecurity-challenge?cid=EXT_FBWBPubs_P_EXT




Senior Economist José Cuesta is a development economist with a Ph.D. in economics from Oxford University. He is an affiliated professor at Georgetown University's Public Policy Institute. Cuesta was previously an assistant professor in development economics at the Institute of Social Studies in the Netherlands. He also worked as a research economist and social sector specialist for the Inter-American Development Bank, and as an economist for the United Nations Development Programme in Honduras. Cuesta's research interests revolve around poverty and conflict economics, specifically the distributive analysis of social policies; intra-household allocation; social protection and labor distortions. He also studies the interaction between poverty, conflict and culture. A Spanish national, Cuesta has experience from a number of countries in Latin America, Asia and Africa.







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¿Son las Páginas Amarillas malas para el medio (sic) ambiente?





Hasta ahora, los españoles con telefonía fija se encuentran año tras año en la puerta de su casa con una o varias guías telefónicas en papel. La edición de 2012 de Páginas Blancas para Madrid Capital pesa cerca de 1,2 kilos y la de Páginas Amarillas ha reducido su formato, pero sigue estando por el medio kilo de papel. En España existen 16 millones de clientes de línea de teléfono fija, así pues, se reparten anualmente unos 32 millones de estas guías. Antaño eran imprescindibles. Sin embargo, con Internet, cada vez son más las personas para las que estos directorios de teléfonos resultan del todo inútiles. De hecho, si el usuario no dicen lo contrario, la de 2012 será la última guía de Páginas Blancas que reciba en papel. Ahora, una holandesa residente en España ha lanzado en la plataforma Actuable una petición para que la Guía de Páginas Amarillas también se reparta solo a aquellos personas que la soliciten: "Páginas Amarillas: no quiero vuestra guía". Obviamente, llevar una guía telefónica hasta la puerta de 16 millones de hogares tiene un impacto ambiental. Requiere generar mucho papel, trabajo de oficina, maquinaria, carburante para distribuir los tomos por todo el territorio. En el caso concreto de las páginas de color amarillo de este directorio de teléfonos, Yell Publicidad, la empresa que elabora la guía en España, especifica que están hechas con fibra virgen de bosques escandinavos bien gestionados, aunque asegura que comenzará a utilizar material reciclado a partir del mes de abril. ¿Son las Páginas Amarillas malas para el medio ambiente? No se trata de demonizar el uso del papel. Como se ha explicado en algún post anterior, en contra de lo que se suele pensar, a veces puede ser preferible un producto forestal que el ordenador o que cualquier gadget electrónico (dependerá del tiempo que esté encendido el aparato, de su gasto de energía, del origen de la electricidad utilizada, de la procedencia del papel, del proceso seguido en la papelera, de qué se haga con el residuo…). Sin embargo, aquí la comparativa entre la guía telefónica e Internet resulta artificial. En este caso, la cuestión no es solo el impacto ambiental que pueda producir una guía, sino que ese impacto sea para nada; que todo eso se haya hecho para que no se abran nunca sus páginas. Así lo recalca la holandesa Hannah Schildt, que llama la atención en que muchas de las guías que se reparten hoy en día van directamente a la basura sin ser jamás utilizadas. La respuesta de Yell Publicidad (las Páginas Amarillas pasaron a manos del grupo Yell en 2006) es que este directorio de teléfonos sigue siendo mucho más utilizado de lo que se cree, pues no todo el mundo tiene o usa Internet. La compañía asegura que los últimos estudios de mercado de GFK indican que el 54,2% de la población adulta en España consultó Páginas Amarillas en el pasado ejercicio y que 20,8 millones de personas habrían realizado 294 millones de consultas en estas guías. Aún así, lo que reclama la iniciativa ciudadana no es que se deje de distribuir la guía de Páginas Amarillas a toda esa gente que sigue utilizándola, sino que no le llegue a quién no quiera recibirla. En realidad, no hay que irse muy lejos para encontrar un caso parecido en el que se ha tomado ya esa decisión: la guía de Páginas Blancas, en cuya distribución también ha participado Yell Publicidad, si bien hasta ahora ha seguido dependiendo de Telefónica. Páginas Amarillas es un concepto comercial en el que Yell Publicidad vende espacios de publicidad. En cambio, Páginas Blancas (con el listado de abonados) está considerado en España un servicio universal que hay que dar obligatoriamente, al igual que las cabinas de teléfono públicas o la conexión a la red telefónica. De esto se ha encargado siempre Telefónica. Sin embargo, se han introducido importantes novedades que entran en vigor a partir de 2012. Una de ellas es que, por primera vez, el operador que se encargue de la guía de abonados podrá ofrecer este servicio en formato digital: solo recibirán la guía en papel aquellos usuarios que así lo pidan. Para muchos, la guía de Páginas Blancas de 2012 será la última que reciban en casa. En Telefónica tienen claro que esto es una avance, pues están de acuerdo en que la guía en papel ha quedado totalmente obsoleta frente a Internet (y el cambio supone además un ahorro de costes). Sin embargo, desde Yell Publicidad, compañía en la que trabajan cerca de 1.000 personas en España, inciden en que estos dos tipos de directorios telefónicos son muy distintos. Como detallan, en el caso de Páginas Amarillas, el negocio se basa en vender espacios de publicidad garantizando justamente que la guía va a llegar a todo el mundo. En 2011, se realizaron 84 ediciones diferentes para cada zona del país, de las que se distribuyeron 16 millones de ejemplares. Según la compañía, "la guía se reparte al 98% de los hogares y empresas de España, y eso es importante para nuestros anunciantes”. La opción de elegir si recibir o no la guía puede perjudicar el negocio publicitario de la empresa, aunque parece razonable que un ciudadano pueda evitar que llegue a su casa algo que no quiere. Por otro lado, la guía de Páginas Amarillas no es tampoco lo único que se distribuye de forma masiva sin que el ciudadano lo pida, o lo quiera recibir. Ocurre también con otros tipos de publicidad, publicaciones, promociones, regalos… Muchos artículos, con un impacto ambiental, que se irán directamente a la basura. ¿Qué opináis vosotros? Por: Clemente Álvarez | 25 de enero de 2012 http://blogs.elpais.com/eco-lab/2012/01







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Convención y feria Anual de la "National Ground Water Association" , Nasville, Tennesse. USA Diciembre 03-06/2013





Del 03 al 06 de diciembre del presente año se llevará a cabo en la ciudad de Nasville, en el estado de Tennesse en los Estados Unidos de NorteAmérica la feria y convención anual sobre aguas subterráneas mas grande y diversa del mundo, organizada por la National Ground Water Association ( NGWA, por sus siglas en inglés), www.ngwa.org. Como todos los años, y con el patroicinio de la empresa privada, se inaugurará la charla: McElliney que esté año estará a cargo del Dr. Carlos Molano,ingeniero e hidrogeólogo Colombiano.




La presentación del Ing. Carlos Molano versará sobre el uso de hojas de calculo en las aguas subterráneas como un medio eficiente y practico para la resolución de problemas simples y complejos de flujo, contaminación y ambientales. En el sitio web de la NGWA se puede encontarr mas información. -Carlos E. Molano, PE, has 30 years of experience in groundwater engineering and environmental hydrogeology. Cofounder and president of Hidrogeocol (formerly Hidrogeología Colombiana Ltd.) with headquarters in Colombia, Ecuador, and Panama, he is also a professor of groundwater flow and pollution in the Department of Civil and Environmental Engineering at Los Andes University in Bogota. During the 1980s, Molano was a pioneer in groundwater modeling and electrical resistivity tomography. He brought to his country of Colombia the first hollow-stem auger rig and direct-push technology equipment. He developed the first operational artificial recharge project, along with the first groundwater monitoring and remediation solutions using modern technologies. In 2012, Molano received the Distinguished Latin-American Hydrogeologist Award from the Latin American Association for Groundwater Development. His colleagues describe him as “an engineer, an outstanding hydrologist, an enthusiastic supporter of new ideas, a heroic field environmental professional in spite of political and economical adversity, a poet and a philosopher of nature.” An NGWA member since 1981, Molano’s passion for developing techniques for teaching groundwater, both to students and practitioners, led him to develop this lecture on groundwater spreadsheets. He also developed a short course on this subject, which is well known in Latin America. Molano holds an M.S. in civil engineering from Los Andes University in Bogota, Colombia, and an M.S. in engineering hydrology from the International Institute for Hydraulic and Environmental Engineering in Delft, Holland. Groundwater Spreadsheets: Efficient and Practical Resource for Solving Simple and Complex Flow, Pollution, and Environmental Problems Attend Carlos E. Molano’s lecture and discover how you can use spreadsheets—in simple form without any programming or complex mathematics—to solve a wide range of groundwater problems. Whether you’re a water well contractor, groundwater scientist, administrator, consultant, ecologist, environmental engineer, water resource planner, or student, you will benefit from learning how to apply “classic” hydrogeology concepts to “modern” hydrogeology concepts such as climate change, global warming, ecohydrology, sustainability, environmental risk assessment, and remediation, through the use of the spreadsheets presented. While various groundwater applications are presented mainly for Latin America (from pre-Columbus and pre-Inca times to current times where very often there is a lack of data and other resources),they can also be used all over the world to learn how some cost-effective solutions may be applied for many other situations. Groundwater spreadsheet topics include, but are not limited to: Pumping and slug tests, step drawdown and intermittent tests Analytical and numerical solutions for groundwater flow and pollution problems Delineation of capture zones, forward and inverse particle tracking for groundwater contamination Hydro-geochemical analysis Earth resistivity soundings interpretation Land subsidence Flow system analysis and impact of climate change in groundwater resources. http://www.ngwa.org/Foundation/mcellhiney/Pages/Future-McEllhiney-Lecturer.aspx







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Groundwater is numbers













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