Showing posts from category food security.
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Full Extent of Africa’s Groundwater Resources Visualized for the First Time
›“In Africa, groundwater is the major source of drinking water and its use for irrigation is forecast to increase substantially to combat growing food insecurity,” yet, a lack of quantitative data has meant that “groundwater storage is consequently omitted from assessments of freshwater availability,” according Alan Macdonald, Helen Bonsor, and Brighid Dochartaigh of the British Geological Survey, and Richard Taylor of University College London, writing in Environmental Research Letters.
The authors hope to remedy this with new research presented in “Quantitative Maps of Groundwater Resources in Africa.” They used estimates compiled from geologic data and 283 aquifer summaries from 152 different publications to quantitatively visualize, for the first time, the full extent of Africa’s groundwater resources.
Tapping a Hidden Resource
The study estimates the scale of the continent’s groundwater resources at around 0.66 million km3. This volume, the authors explain, is “more than 100 times the annual renewable freshwater resources, and 20 times the freshwater stored in African lakes.”
Tapping into this massive resource is not always straightforward, however. The largest aquifers, and those most able to support high yielding bores, are concentrated in the arid regions of North Africa. The depth of these aquifers and their distance from major populations creates substantial economic challenges for extraction.
The geographic distribution of aquifers across sub-Saharan Africa is also quite variable, and local geology can determine not just the availability and accessibility of water but also its quality. For instance, geologic specificities can result in elevated levels of arsenic and other undesirable chemicals. Furthermore, “contamination…is common in urban areas from widespread and dispersed faecal effluent from on-site sanitation and leaking sewers.”
Tempering Expectations
Throughout Africa, “groundwater provides an important buffer to climate variability and change,” say the authors. But these buffers are not a singular solution to the threat of future water scarcity.
As the analysis shows, most aquifers, especially south of the Sahara, are unlikely to sustain boreholes of a higher capacity than that required by community-level hand pumps (one liter per second of flow at minimum). Yet, commercial irrigations schemes and urban towns typically demand boreholes greater than five liters per second, according to the study.
So, groundwater extraction may help communities and some small-scale farmers maintain access to water, particularly because many aquifers are found to possess the storage capacity required “to sustain abstraction through inter-annual variations in recharge,” however, “strategies for increasing irrigation or supplying water to rapidly urbanizing cities that are predicted on the widespread drilling of high yielding boreholes are likely to be unsuccessful.” Especially, the authors assert, where drilling precedes detailed local scale mapping of the available resources.
Sources: Environmental Research Letters.
Image Credit: Figures 1 and 3, courtesy of Environmental Research Letters. -
Poor Land Tenure: A Key Component to Why Nations Fail
›The murder of five land rights campaigners during the last two months – one in Colombia, three in Brazil, and one in Cambodia – have not captured many headlines, but they are a reminder of the central role land tenure plays not just in rural economic development but also in sparking broadly distributed economic gains throughout a society.
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Philippines’ Bohol Island Demonstrates Benefits of Integrated Conservation and Health Development
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In March 2012, I participated in a study tour to the island of Bohol, near the unique Danajon double barrier reef ecosystem – the only one of its kind in the Philippines and one of only three in the Indian and Pacific Oceans. Nowhere is the connection between population dynamics and biodiversity more evident than in the Philippines, one of the most densely-populated countries on the planet, with more than 300 people per square kilometer. Nearly every major species of fish in the region shows signs of overfishing, according to the World Bank.
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Improving Food Security Through Land Rights and Access to Family Planning
›“In a future world affected by climate change, population growth is one lever that can be addressed to ameliorate the impacts of climate change, particularly in the area of food security,” write Scott Moreland and Ellen Smith in “Modeling Climate Change, Food Security, and Population,” a recent study for MEASURE Evaluation and USAID. Moreland and Smith combine demographic changes, food needs, and economic capacity into a single aggregate model to assess how family planning and climate change might affect food security from now until 2050. Using Ethiopia as an example, the model finds that if access to family planning services were increased to meet existing needs, the subsequent decrease in demand for food would reduce child malnutrition and effectively counteract a projected 25 percent shortfall in caloric availability from climate change’s impact on agriculture. Programs designed to increase access to family planning should therefore be incorporated into national adaptation and food security strategies, they conclude. “Family planning, especially in countries with high unmet need, provides a potential solution not only for women’s reproductive health, but also for adapting to the effects of climate change.”The Food and Agriculture Organization’s Committee on World Food Security recently endorsed a set of voluntary guidelines for land tenure governance in the context of food security that aims to strike a balance between encouraging productive investment and ensuring equitable and sustainable development. Population growth, climate change, and environmental degradation are putting pressure on the legal and cultural systems that govern land rights, resulting in “inadequate and insecure tenure rights” which can “increase vulnerability, hunger and poverty, and can lead to conflict and environmental degradation when competing users fight for control of these resources.” The guidelines, drawn from consultations with hundreds of people from both the private and public spheres and representing more than 130 countries, emphasize the need to safeguard access to land, fisheries, and forests – as well as the resources they provide – in a way that respects customary tenure systems, which are not always reflected in official tenure policies or records. They also emphasize strengthening the ownership rights of women and other traditionally marginalized groups in order to enhance food security and minimize the risk of instability and conflict in the future. -
The Global Water Security Assessment and U.S. National Security Implications
›“Water security is about much more than access to H2O,” said Jane Harman, director, president, and CEO of the Wilson Center at the May 9 meeting, “Global Water Security: The Intelligence Community Assessment.” The event – part of the Wilson Center’s National Conversation Series – brought together a number of experts to discuss a recently released intelligence community assessment of global water security. [Video Below]
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Nigeria Beyond the Headlines: Demography and Health [Part One]
›“Nigeria is a country of marginalized people. Every group you talk to, from the Ijaws to the Hausas, will tell you they are marginalized,” said Peter Lewis, director of the African Studies Program at the Johns Hopkins University School of Advanced International Studies. Lewis spoke at an April 25 conference on Nigeria, co-hosted by ECSP and the Wilson Center’s Africa Program, assessing the country’s opportunities for development given its demographic, governance, natural resource, health, and security challenges. [Video Below]
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Taming Hunger in Ethiopia: The Role of Population Dynamics
›May 4, 2012 // By Laurie MazurEthiopia has been deemed a population-climate “hotspot” – a place where rapid growth and a changing climate pose grave threats to food security and human well-being.
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Women’s Rights and Voices Belong at Rio+20
›This summer, world leaders will gather in Rio de Janeiro for the 20th anniversary of the first UN Earth Summit to hammer out a new set of agreements on what sustainable development means and, more importantly, how both rich and developing nations can get there before it’s too late. However, for the scores of women who will be attending (and just importantly for those who aren’t), there are glaring omissions: reproductive health, gender equality, and girls education are nowhere to be found on the Rio+20 agenda.
Women offer many of the most promising levers for the transformation to sustainable development. My experience with the Global Fund for Women tells me that women are full of creative and strategic solutions to the problems facing their communities around the world. Their voices must be included in critical decisions affecting our world. And the fact is, sustainable development isn’t sustainable if it doesn’t include empowering women to plan their families, educate themselves, and their children, and have a voice in government at all levels. Rio+20 must have human rights – and women’s rights – at its core. Earth summit planners haven’t yet done that, but women can make it happen.
Women are 51 percent of the world’s population, yet own only one percent of its assets, are two-thirds of the world’s workers but earn a mere 10 percent of wages. Rio+20 must not become another forum in which women’s issues are not heard. Instead, the summit must demonstrate that women’s voices are integral to all development. Environmental sustainability simply can’t happen without women’s inclusion.
For example, in West Africa, women make up 70 percent of workers in agriculture. In Burkina Faso, deforestation, water scarcity, and soil erosion show us that climate change is already impacting women farmers. Women tend to “sacrifice themselves” in order to care for their families – feeding themselves last. And women are most likely to suffer and die in environmental disasters – particularly in the Asian countries most at risk from climate change.
So how do we support women while supporting the environment that sustains us all?
Simply meeting women’s needs for family planning is one inexpensive and powerful development strategy with a host of environmental benefits. Over 200 million women around the world want the ability to choose the spacing and number of children but don’t have access to, or accurate information about, basic contraceptives like condoms, pills, and IUDs. One-hundred and seventy-nine nations already agree that meeting this need is a top priority, and the Millennium Development Goals (MDGs) reflect a goal of universal access to family planning as well.
Satisfying this demand would dramatically reduce maternal and child mortality and enhance human rights. What’s more, two recent studies show that a reduction of 8 to 15 percent of essential carbon emissions can be obtained by meeting women’s needs for family planning. This reduction would be equivalent to stopping all deforestation or increasing the world’s use of wind power fortyfold.
The Earth Summit presents a major opportunity to ensure that women’s needs and rights are given top priority in plans for sustainable development. In a time of multiple, interlinked human and environmental crises and a very tight funding environment, investing in women is a clear winner.
A greater understanding of the impact of environmental degradation, pollution, and climate change on women, coupled with solid public policy that respects and protects women’s reproductive rights, is essential to the “Sustainable Development Goals” that many believe will emerge from Rio+20 to replace the MDGs, which expire in 2015.
As the summit approaches, it’s time to reflect on why women’s full participation and inclusion is so important and call for world leaders to harness the power of women as we launch the era of sustainable development.
Musimbi Kanyoro is president and CEO of the Global Fund for Women, which advances women’s human rights by investing in women-led organizations worldwide.
Sources: Food and Agriculture Organization, Guttmacher Institute, Moreland et al. (2010), O’Neill et al. (2010), Princeton Environmental Institute, UN, UNEP, World Bank, World Health Organization.
Photo Credit: “Reokadia Nakaweesa Nalongo,” courtesy of Jason Taylor/Friends of Earth International.
