While child mortality rates have plummeted worldwide, . Children who are stunted (having low height-for-age) suffer from a long-term failure to grow, reflecting the cumulative effects of chronic deficits in food intake, poor care practices, and illness. The early years of life, especially the first 1,000 days, are critical; if a child’s growth is stunted during this period, the effects are irreversible and have lifelong and intergenerational consequences on their future human capital and potential to succeed.
For the water and sanitation community the year 2009 marked a turning point in our understanding of the role that Water, Sanitation and Hygiene (WASH) has on child stunting. A provocative Lancet article (Humphrey 2009) put forth the hypothesis that a key cause of child stunting is asymptomatic gut infection caused by ingestion of fecal bacteria. Small children living in poor sanitary environments are especially at risk, through frequent mouthing of fingers and objects during exploratory play, playing in areas contaminated with human and animal feces and ingesting contaminated food and water (Ngure et al. 2013). Researchers now estimate that up to 43 percent of stunting may be due to these gut infections, known as environmental enteric dysfunction (EED) (Guerrant et al. 2013).
Just last week estimates were released suggesting that (Danaei et al. 2016). In a key departure from previous work, the researchers defined risk as the sanitation level of a community, rather than an individual. This is consistent with mounting evidence showing that a community’s coverage of sanitation is more important than any one household’s (Andres et al. 2013). Across different studies, data sets and outcomes the evidence consistently shows that a threshold of around 60–70 percent household usage within a community is needed before the health and nutrition benefits of sanitation begin to accrue. Studies that have focused on an individual’s toilet use as a predictor, rather than a community’s use, may have vastly underestimated the impacts (Hunter and Prüss-Ustün 2016).
As we advance our understanding of the ways in which a poor sanitary environment impacts growth in small children, we can better design water and sanitation interventions to target these pathways. While there is a role for multi-sectoral interventions, which can simultaneously target the underlying determinants of child undernutrition, such as food security, access to health services, and childcare practices — there are ways that the water sector can adapt its own approaches so that they are more nutrition-sensitive, and more impactful on nutrition. Here are four key actions:
The Bill & Melinda Gates Foundation – Jan Willem Rosenboom
The University of Leeds – Barbara Evans
Emory University – Christine Moe & Eduardo Perez
The World Bank – Sophie Trémolet, Valérie Sturm, Clémentine Stip
WaterAid – Andrés Hueso
Plan International – Darren Saywell
A successful city is economically and culturally vibrant, healthy, safe, clean and attractive to business and tourism, and provides quality of life to its citizens. This vision is appealing but remains hard to realize as developing cities have to cope with changing demographics and climate with limited financial and human resources. The sustainable development goals have given a new impetus for cities to be inclusive, safe, resilient and sustainable (SDG11), ensure citizens’ health and wellbeing (SDG3) and secure access to sustainable water and sanitation services (SDG6).
World Toilet Day on November 19th is the opportunity to remind ourselves of a few facts and propose a set of guiding principles for a renewed and revitalized urban sanitation agenda.
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Two years ago, during the 2014 SIWI World Water Week, key international experts discussed the need for a paradigm shift in water consumption: the move from a linear to a circular economy—an economy that is restorative and regenerative by design, and which aims to keep products, components and materials at their highest utility and value at all times.
With global demand for water predicted to exceed viable resources by 40 percent in 2030,and adopt new approaches that allow for this vital resource to be reused as much as possible, and achieve efficient standards for water management.
These previous SIWI World Water Week discussions allowed raising awareness about the adoption of a circular economy as a viable sustainable development strategy; its particular relevance to the water sector, in view of the fundamental and cross-cutting role it has across all sectors; and the combination of regulations and incentives, and strong multi-stakeholder approach, required to allow the market to transform.—moving away from traditional linear water consumption patterns of “take-make-dispose” and heading towards a circular economy approach where wastewater is no longer seen as waste or an environmental hazard, but rather as a valuable resource that contributes to overcome water stress and imbalances between supply and demand —is particularly relevant to the Latin American region, and the 2016 SIWI World Water Week event of this year will take this conversation forward.
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The global water community is gathering in Stockholm for World Water Week 2016. This year’s theme, “Water for Sustainable Growth,” comes at a critical time, as we are mobilizing to achieve the Sustainable Development Goals (SDGs), in which water plays an essential part.
It drives economic growth, supports healthy ecosystems, and is fundamental for life. However, water can threaten health and prosperity as well as promote it. Water-related hazards, including floods, storms, and droughts, are already responsible for 9 out of 10 natural disasters, and climate change is expected to increase these risks.
Over the next two decades and beyond, ‘thirsty agriculture’ and ‘thirsty energy’ competing with the needs of ‘thirsty cities’ will place new and increasing demands on the water sector. Over 4 billion people currently live in areas where water consumption is greater than renewable resources for part of the year – a number that will continue to increase.
This scenario is not unique. For many countries like Myanmar, where only one-third of the population has access to electricity, hydropower presents a compelling opportunity to increase energy supply at low costs and make important contributions to development objectives and water resources management.
Myanmar has ambitious future hydropower development plans that mirror the trends seen globally. Projections show that the world is poised to nearly double hydropower capacity by 2040, building as many hydropower dams in the next 25 years as were built in the previous century.
In a report funded by the United Kingdom’s Department for International Development (DFID), The Nature Conservancy worked with WWF and the University of Manchester to demonstrate a framework that could be applied in Myanmar and replicated worldwide to change the trajectory of water resource development towards a more sustainable path. By adopting system-scale planning and engaging diverse stakeholders, Myanmar has the opportunity to be a leader and global example.
Each year on March 22 we mark World Water Day. It is an opportunity to keep the urgent water issues – from lack of sanitation to transboundary water to climate change -- top of my mind for practitioners, decision makers and the global public. In the coming days we will post here updates and stories from the field, as well as links to some of our partners’ content. But, more importantly, this is an opportunity to hear from you, too.
The theme of this year’s #worldwaterday focuses on water and energy. And for good reasons.
For the last six years, a power plant in San Luis Potosi, Mexico has bought water from a nearby wastewater treatment plant to use in its cooling towers (instead of using freshwater). This operation, Project Tenorio, a public-private partnership, continues today and has already resulted in the reduction of groundwater extraction of at least 48 million cubic meters (equivalent to 19,000 Olympic size pools) and increased aquifer sustainability.
This is a good example of the water and energy nexus in practice: the wastewater treatment plant covers almost all of its operating costs from this additional revenue stream and the power plant gets a more reliable water source that is also 33% cheaper than groundwater in that area.
Treated wastewater has been used to reduce the water requirements of power plants in several other countries as well, as water supply becomes more variable or disappears. In the US, for example, around 50 power plants are using treated wastewater for cooling in order to adapt to water shortages. However, innovative integrated approaches like these are still more of an exception than the norm.
For users of water-based sanitation, most of us give little thought to what happens after we hear the sound of the toilet flushing. Wooooosh -- out of sight, out of mind.Certainly, there is massive benefit to be derived from owning and using a functioning toilet.
But what if you were told that there is nothing at the end of the sewage pipe that actually deals with what flows down the toilet? What if you learned that every flush pollutes the environment, and that combined with the chemicals, heavy metals and nutrients from industrial pollution and agricultural run-off, the improperly treated waste was turning rivers, lakes and estuaries into dead zones? Would you think twice next time you flushed?