|
|
Line 10: |
Line 10: |
| Food security is assured “when all people, at all times, have physical and<br/>economic access to sufficient, safe and nutritious food to meet their dietary<br/>needs and food preferences for an active and healthy life”.<ref>Food and Agriculture Organization (November 1996)."Rome Declaration on Food Security and World Food Summit Plan of Action".</ref> It refers to the right to food ,<br/>a fundamental, individual right established since 1948 by the United Nations as part of<br/>overall human rights.<ref>United Nations Resolution 217 A, Article 25, 10th December 1948.</ref><br/>Global food security is a major challenge for public policies. In fact, the<br/>reduction of poverty and hunger is the first MDG (Millennium Development<br/>Goal. It is estimated that at least 852 million people worldwide suffer from hunger and<br/>malnutrition; four-fifths of them live in rural areas.<ref>FAO, (2005) : The state of food insecurity in the world. FAO,fckLRRome (www.fao.org/documents). </ref> Feeding a world with a rising<br/>population requires determined and concerted action to increase agricultural production.<br/><br/>The relationship between water and food security is complex and significant. Water is a<br/>fundamental resource for crop and animal production, and aquaculture. Irrigation can<br/>contribute to the intensification and the diversification of food supplies. Better access to<br/>water, and a concerted and sustainable management of water resources, including the<br/>sharing of water among its various uses, is essential to increasing crop, animal and fish<br/>production, and their availability. Moreover, water is required for food-processing.<br/>Hence, an effective food processing sector needs a regular supply of good quality water<br/>to guarantee the food safety of final products.<br/><br/>The relationship between water and food security is of great importance because the<br/>ecosystems, both natural and artificial, are central in water management processes: they<br/>collect rainwater, store it, transfer it, and make it available to sustain ecosystems,<br/>agricultural production and other processes. | | Food security is assured “when all people, at all times, have physical and<br/>economic access to sufficient, safe and nutritious food to meet their dietary<br/>needs and food preferences for an active and healthy life”.<ref>Food and Agriculture Organization (November 1996)."Rome Declaration on Food Security and World Food Summit Plan of Action".</ref> It refers to the right to food ,<br/>a fundamental, individual right established since 1948 by the United Nations as part of<br/>overall human rights.<ref>United Nations Resolution 217 A, Article 25, 10th December 1948.</ref><br/>Global food security is a major challenge for public policies. In fact, the<br/>reduction of poverty and hunger is the first MDG (Millennium Development<br/>Goal. It is estimated that at least 852 million people worldwide suffer from hunger and<br/>malnutrition; four-fifths of them live in rural areas.<ref>FAO, (2005) : The state of food insecurity in the world. FAO,fckLRRome (www.fao.org/documents). </ref> Feeding a world with a rising<br/>population requires determined and concerted action to increase agricultural production.<br/><br/>The relationship between water and food security is complex and significant. Water is a<br/>fundamental resource for crop and animal production, and aquaculture. Irrigation can<br/>contribute to the intensification and the diversification of food supplies. Better access to<br/>water, and a concerted and sustainable management of water resources, including the<br/>sharing of water among its various uses, is essential to increasing crop, animal and fish<br/>production, and their availability. Moreover, water is required for food-processing.<br/>Hence, an effective food processing sector needs a regular supply of good quality water<br/>to guarantee the food safety of final products.<br/><br/>The relationship between water and food security is of great importance because the<br/>ecosystems, both natural and artificial, are central in water management processes: they<br/>collect rainwater, store it, transfer it, and make it available to sustain ecosystems,<br/>agricultural production and other processes. |
| | | |
− | = 2. Global Water Crisis and Water Management = | + | = Global Water Crisis and Water Management<br/> = |
| | | |
− | Water is one of the most basic human needs. With impacts on agriculture, energy,<br/>health, livelihood etc. water management underlies the most basic development<br/>challenges. Water is a shared resource that interconnects the environment, food<br/>security, generation of energy and many other sectors. Lack of water stifles socio-<br/>economic growth of any country. The world will face a shortage of water in the near<br/>future and global climate change will exacerbate the problem of water shortage<ref>World Bank (2007): Making the Most of Scarcity: Accountability for Better Water Management Results in the Middle East and North Africa. Washington, USA.</ref>. It has<br/>been estimated that in another 15-20 years, the world will be facing a 30% water gap.<ref>Chartres,C and Varma,S. (2010). Out of Water: From Abundance to Scarcity and How to Solve the World's Water Problems, London, Financial Times Prentice Hall.</ref><br/>The global water crisis will affect the capacity of both potable and agricultural water<br/>supply to meet the basic needs of living organisms. By the year 2050, global grain<br/>production will have to be doubled in order to meet the demand of a growing global<br/><br/>population with changing consumption patterns to more protein-based diets at a time of<br/>climatic changes. There are large variations in the estimates to what extent water<br/>scarcity will impact human and economic development, but the projected rise in the<br/>number of people living in water-scarce regions ranges 1-2.5 to 3-9 billion over the next<br/>century.<ref>FAO (2012): Coping with water scarcity - An action framework for agriculture and Food Security.</ref><br/><br/>As nearly 90% of global water resources are used for food production, the water crisis<br/>will particularly affect agricultural water use and thus food security. The main challenge<br/>will therefore is to improve efficiency of agricultural water management in order to produce 50% more food by 2050 to meet global demand. The International Water Management (IWMI) therefore summarized the challenges as “it is possible to produce the food—but it is probable that today’s food production and environmental trends, if continued, will lead to crises in many parts of the world. Only if we act to improve water use in agriculture, we will meet the acute freshwater challenges facing humankind over the coming 50 years”.<ref>Comprehensive Assessment of Water Management in Agriculture. (2007). Water for Food, Water for Life: A Comprehensive Assessment of Water Management in Agriculture. London: Earthscan, and Colombo: International Water Management Institute.)</ref> As Food Security is determined to a great extent by productivity and availability of water, the implementation of appropriate action will solve the coming water crises and food security. Hence, it is sine qua non that effective water management policies are implemented world wide.<br/> | + | Water is one of the most basic human needs. With impacts on agriculture, energy, health, livelihood etc. water management underlies the most basic development challenges. Water is a shared resource that interconnects the environment, food security, generation of energy and many other sectors. Lack of water stifles socio-economic growth of any country. The world will face a shortage of water in the near future and global climate change will exacerbate the problem of water shortage<ref>World Bank (2007): Making the Most of Scarcity: Accountability for Better Water Management Results in the Middle East and North Africa. Washington, USA.</ref>. It has been estimated that in another 15-20 years, the world will be facing a 30% water gap.<ref>Chartres,C and Varma,S. (2010). Out of Water: From Abundance to Scarcity and How to Solve the World's Water Problems, London, Financial Times Prentice Hall.</ref> The global water crisis will affect the capacity of both potable and agricultural water supply to meet the basic needs of living organisms. By the year 2050, global grain production will have to be doubled in order to meet the demand of a growing global population with changing consumption patterns to more protein-based diets at a time of climatic changes. There are large variations in the estimates to what extent water scarcity will impact human and economic development, but the projected rise in the number of people living in water-scarce regions ranges 1-2.5 to 3-9 billion over the next century.<ref>FAO (2012): Coping with water scarcity - An action framework for agriculture and Food Security.</ref><br/>As nearly 90% of global water resources are used for food production, the water crisis will particularly affect agricultural water use and thus food security. The main challenge will therefore is to improve efficiency of agricultural water management in order to produce 50% more food by 2050 to meet global demand. The International Water Management (IWMI) therefore summarized the challenges as “it is possible to produce the food—but it is probable that today’s food production and environmental trends, if continued, will lead to crises in many parts of the world. Only if we act to improve water use in agriculture, we will meet the acute freshwater challenges facing humankind over the coming 50 years”.<ref>Comprehensive Assessment of Water Management in Agriculture. (2007). Water for Food, Water for Life: A Comprehensive Assessment of Water Management in Agriculture. London: Earthscan, and Colombo: International Water Management Institute.)</ref> As Food Security is determined to a great extent by productivity and availability of water, the implementation of appropriate action will solve the coming water crises and food security. Hence, it is sine qua non that effective water management policies are implemented world wide.<br/> |
| | | |
| == Water efficiency<br/> == | | == Water efficiency<br/> == |
Line 39: |
Line 39: |
| == Water Governance == | | == Water Governance == |
| | | |
− | Water Governance<ref>Cecilia Tortajada (2010) Water Governance: Some Critical Issues. Water Resources Development. Vol. 26, No. 2, 297–307, June 2010 http://www.tandfonline.com/doi/pdf/10.1080/07900621003683298 | + | Water Governance<ref>Cecilia Tortajada (2010) Water Governance: Some Critical Issues. Water Resources Development. Vol. 26, No. 2, 297–307, June 2010 http://www.tandfonline.com/doi/pdf/10.1080/07900621003683298fckLR</ref> is an important aspect in water management. Some prescriptions<br/>for improved water governance include: |
− | </ref> is an important aspect in water management. Some prescriptions<br/>for improved water governance include: | + | |
| *Treating water as an economic good; | | *Treating water as an economic good; |
| *Declaring water a state property and creating water rights; | | *Declaring water a state property and creating water rights; |
Line 49: |
Line 48: |
| = Climate Change<br/> = | | = Climate Change<br/> = |
| | | |
− | There is ample evidence that climate change will increase hydrologic variability, resulting<br/>in extreme weather events such as droughts floods, and major storms. It will continue to<br/>have a profound impact on economies, health, lives, and livelihoods. The poorest people<br/>will suffer most. The pressures on water resources and hence on food security are<br/>expected to worsen because of climate change.<br/><br/>The probable changes in precipitation and evaporation will translate directly to shifts in<br/>the existing pattern of soil moisture deficits, groundwater recharge and runoff. With<br/>respect to cropping calendars, the most immediate impacts will be felt by rainfed<br/>agriculture whose yield performance is expected to exhibit more volatility as a result of<br/>moisture stress in regions with declining rainfall. In areas experiencing increased rainfall<br/>and temperature, higher intensity rainfall may damage crops and erode soils.<br/><br/><br/><br/>3.1 Relation to Food Security<br/><br/>There is recent evidence that the global food production system is at an unprecedented<br/>level of risk due to climate change. The impact of these anticipated hydrological changes<br/>on food production will be felt primarily in terms of supply stability. The undesirable<br/>consequences of degradation of natural resource systems that once managed to<br/>produce large volumes of food staples are now clearly evident in many parts of Asia and<br/>Africa. Against a background of degraded agricultural land, diminishing water resources<br/>affecting agricultural production has become a key concern. Low water availability due to<br/>drought conditions will impair food security. This will increase the vulnerability of<br/>marginalized and poor people in both rural and urban areas. Increases in the intensity of<br/>rains will experience increased flooding, and landslide affecting food security. Hence,<br/>effective implementing appropriate measures to counter the negative effects of climate<br/>change on food security is essential.<br/><br/>4. References:<br/><br/>IPCC. (2001) Climate Change. The Scientific Basis.: Contribution of Working Group I to<br/>the Third Assessment Report of the Intergovernmental Panel on Climate Change<br/>(Houghton, J.T.,Y. Ding, D.J. Griggs, M. Noguer, P.J. van der Linden, X. Dai, K. Maskell,<br/>and C.A. Johnson (eds.)). Cambridge University Press, Cambridge, United Kingdom and<br/>New York, NY, USA, 881pp.<br/><br/>The German International Development Cooperation -GIZ ( 2012) Better Water Use<br/>Efficiency for Increasing Yields and Food Security - from Watershed to Field. Akker, van<br/>den; E.; Compaore, A.; Gandarillas, H.; Hoogendam, P.; Kuylenstierna, J.; Molle, F.,<br/>and Nill, D.<br/><br/>Schmidhuber, J and Tubiello, F. (2007). Global food security under climate change.<br/>Proceedings of the National Academy of Sciences of the United States of America PNAS<br/>104 <nobr style="background-color: rgb(255, 241, 184); color: blue; cursor: pointer; border-radius: 3px; border: 1px solid rgb(170, 170, 170)" title="sipgate Click2Dial for (50)19703 (Belize)" sipgateffx_number="(50) 19703">(50) 19703chrome://sipgateffx/skin/icon_click2dial.gif</nobr>–19708 [http://www.pnas.org/content/104/50/19703.full http://www.pnas.org/content/104/50/19703.full]<br/><br/><br/><br/><br/>5. Further Reading:<br/><br/>Comprehensive Assessment of Water Management in Agriculture. (2007). Water for<br/>Food, Water for Life: A Comprehensive Assessment of Water Management in<br/>Agriculture. London: Earthscan, and Colombo: International Water Management<br/>Institute.<br/><br/><br/>FAO, (2012). Water scarcity and food security. A framework for action<br/>Giordano, Meredith A., Frank Rijsberman, R. Maria Saleth (2006) (eds.): “More Crop per<br/>Drop”: Revisiting a Research Paradigm. Results and Synthesis of IWMI’s Rese UNEP<br/>(2009):<br/><br/>Global Water Forum. (2012). Understanding Water Scarcity. Available online:<br/>[http://www.iwmi.cgiar.org/news_room/pdf/Understanding_water_scarcity.pdf http://www.iwmi.cgiar.org/news_room/pdf/Understanding_water_scarcity.pdf]<br/><br/>The German International Development Cooperation -GIZ (2013). Effective Agricultural<br/>Water Management February 2013.pdf<br/><br/>The German International Development Cooperation -GIZ (2012): Better Water Use<br/>Efficiency for Increasing Yields and Food Security - from Watershed to Field. Stockholm<br/>Water Week 2012<br/><br/>The German International Development Cooperation –GIZ. (2010): Water Saving<br/>Irrigation. Briefing Note. Division of Rural Development.<br/><br/>R. Taylor. (2010). Rethinking water scarcity: the role of storage. Available<br/>online:[http://www.odi.org.uk/sites/odi.org.uk/files/odi-assets/events- http://www.odi.org.uk/sites/odi.org.uk/files/odi-assets/events-]<br/>presentations/687.pdf<br/><br/>UNEP (2009). Rainwater harvesting: a lifeline for human well-being. A report prepared<br/>for UNEP by Stockholm Environment Institute. ISBN: 978 - 92 - 807 - 3019 - 7<br/><br/>[http://www.unwater.org/downloads/Rainwater_Harvesting_090310b.pdf http://www.unwater.org/downloads/Rainwater_Harvesting_090310b.pdf]<br/><br/><br/>Water and Food Security facing global change: what challenges, what solutions ?.<br/>(2012) . This report is the result of analysis and multi-stakeholder discussions,<br/>conducted from September 2010 to January 2012 under the French Water Partnership<br/>(FWP).<br/>[http://www.avsf.org/public/posts/693/water-and-food-security-facing-global-change- http://www.avsf.org/public/posts/693/water-and-food-security-facing-global-change-]<br/>what-challenges-what-solutions.pdf<br/><br/><br/><br/><br/> | + | There is ample evidence that climate change will increase hydrologic variability, resulting in extreme weather events such as droughts floods, and major storms. It will continue to have a profound impact on economies, health, lives, and livelihoods. The poorest people will suffer most. The pressures on water resources and hence on food security are<br/>expected to worsen because of climate change.<br/>The probable changes in precipitation and evaporation will translate directly to shifts in the existing pattern of soil moisture deficits, groundwater recharge and runoff. With respect to cropping calendars, the most immediate impacts will be felt by rainfed agriculture whose yield performance is expected to exhibit more volatility as a result of oisture stress in regions with declining rainfall. In areas experiencing increased rainfall and temperature, higher intensity rainfall may damage crops and erode soils.<br/> |
| + | |
| + | == Relation to Food Security<br/> == |
| + | |
| + | There is recent evidence that the global food production system is at an unprecedented level of risk due to climate change. The impact of these anticipated hydrological changes on food production will be felt primarily in terms of supply stability. The undesirable consequences of degradation of natural resource systems that once managed to produce large volumes of food staples are now clearly evident in many parts of Asia and Africa. Against a background of degraded agricultural land, diminishing water resources affecting agricultural production has become a key concern. Low water availability due to drought conditions will impair food security. This will increase the vulnerability of marginalized and poor people in both rural and urban areas. Increases in the intensity of rains will experience increased flooding, and landslide affecting food security. Hence, effective implementing appropriate measures to counter the negative effects of climate<br/>change on food security is essential.<br/> |
| + | |
| + | = References<br/> = |
| + | |
| + | <references /><br/>IPCC. (2001) Climate Change. The Scientific Basis.: Contribution of Working Group I to<br/>the Third Assessment Report of the Intergovernmental Panel on Climate Change<br/>(Houghton, J.T.,Y. Ding, D.J. Griggs, M. Noguer, P.J. van der Linden, X. Dai, K. Maskell,<br/>and C.A. Johnson (eds.)). Cambridge University Press, Cambridge, United Kingdom and<br/>New York, NY, USA, 881pp.<br/><br/>The German International Development Cooperation -GIZ ( 2012) Better Water Use<br/>Efficiency for Increasing Yields and Food Security - from Watershed to Field. Akker, van<br/>den; E.; Compaore, A.; Gandarillas, H.; Hoogendam, P.; Kuylenstierna, J.; Molle, F.,<br/>and Nill, D.<br/> |
| + | |
| + | Schmidhuber, J and Tubiello, F. (2007). Global food security under climate change. <br/>Proceedings of the National Academy of Sciences of the United States of America PNAS <br/>104 (50) 19703–19708 http://www.pnas.org/content/104/50/19703.full <br/> |
| + | |
| + | = Further Reading<br/> = |
| + | |
| + | Comprehensive Assessment of Water Management in Agriculture. (2007). Water for<br/>Food, Water for Life: A Comprehensive Assessment of Water Management in<br/>Agriculture. London: Earthscan, and Colombo: International Water Management<br/>Institute.<br/>FAO, (2012). Water scarcity and food security. A framework for action<br/>Giordano, Meredith A., Frank Rijsberman, R. Maria Saleth (2006) (eds.): “More Crop per<br/>Drop”: Revisiting a Research Paradigm. Results and Synthesis of IWMI’s Rese UNEP<br/>(2009):<br/>Global Water Forum. (2012). Understanding Water Scarcity. Available online:<br/>[http://www.iwmi.cgiar.org/news_room/pdf/Understanding_water_scarcity.pdf http://www.iwmi.cgiar.org/news_room/pdf/Understanding_water_scarcity.pdf]<br/>The German International Development Cooperation -GIZ (2013). Effective Agricultural<br/>Water Management February 2013.pdf<br/>The German International Development Cooperation -GIZ (2012): Better Water Use<br/>Efficiency for Increasing Yields and Food Security - from Watershed to Field. Stockholm<br/>Water Week 2012<br/>The German International Development Cooperation –GIZ. (2010): Water Saving<br/>Irrigation. Briefing Note. Division of Rural Development.<br/>R. Taylor. (2010). Rethinking water scarcity: the role of storage. Available<br/>online:[http://www.odi.org.uk/sites/odi.org.uk/files/odi-assets/events- http://www.odi.org.uk/sites/odi.org.uk/files/odi-assets/events-]<br/>presentations/687.pdf<br/>UNEP (2009). Rainwater harvesting: a lifeline for human well-being. A report prepared<br/>for UNEP by Stockholm Environment Institute. ISBN: 978 - 92 - 807 - 3019 - 7 [http://www.unwater.org/downloads/Rainwater_Harvesting_090310b.pdf http://www.unwater.org/downloads/Rainwater_Harvesting_090310b.pdf]<br/>Water and Food Security facing global change: what challenges, what solutions ?.<br/>(2012) . This report is the result of analysis and multi-stakeholder discussions,<br/>conducted from September 2010 to January 2012 under the French Water Partnership<br/>(FWP). [http://www.avsf.org/public/posts/693/water-and-food-security-facing-global-change- http://www.avsf.org/public/posts/693/water-and-food-security-facing-global-change-]<br/>what-challenges-what-solutions.pdf<br/> |
Revision as of 19:36, 29 December 2013
As nearly 90% of global water resources are used for food production, the impending water crisis will particularly affect agricultural water use and thus food security.. In the context of climate changes that are reported to be taking place all over the world, the problems related to food security due to water crisis will be exacerbated. Hence, it is very important that appropriate actions are taken to Improve Food Security by effective Agricultural Water Management.
Definition
There is Food Security when all people, at all times, have physical and
economic access to sufficient, safe and nutritious food to meet their dietary
needs and food preferences for an active and healthy life. By the year 2050, global food
production will have to be doubled in order to meet the food demands of the people.
Many have predicted a global water crisis in time to come that will affect the capacity of
both potable and agricultural water supply to meet the basic needs of crop production.
Water plays a crucial role in crop, animal and aquaculture and also in food-processing.
Hence the universal motto "Water is life! Without water there certainly can be no
agricultural production, thus no food production. Hence, it is essential that effective
Agricultural Water Management practices are implemented.
Food Security
Food security is assured “when all people, at all times, have physical and
economic access to sufficient, safe and nutritious food to meet their dietary
needs and food preferences for an active and healthy life”.[1] It refers to the right to food ,
a fundamental, individual right established since 1948 by the United Nations as part of
overall human rights.[2]
Global food security is a major challenge for public policies. In fact, the
reduction of poverty and hunger is the first MDG (Millennium Development
Goal. It is estimated that at least 852 million people worldwide suffer from hunger and
malnutrition; four-fifths of them live in rural areas.[3] Feeding a world with a rising
population requires determined and concerted action to increase agricultural production.
The relationship between water and food security is complex and significant. Water is a
fundamental resource for crop and animal production, and aquaculture. Irrigation can
contribute to the intensification and the diversification of food supplies. Better access to
water, and a concerted and sustainable management of water resources, including the
sharing of water among its various uses, is essential to increasing crop, animal and fish
production, and their availability. Moreover, water is required for food-processing.
Hence, an effective food processing sector needs a regular supply of good quality water
to guarantee the food safety of final products.
The relationship between water and food security is of great importance because the
ecosystems, both natural and artificial, are central in water management processes: they
collect rainwater, store it, transfer it, and make it available to sustain ecosystems,
agricultural production and other processes.
Global Water Crisis and Water Management
Water is one of the most basic human needs. With impacts on agriculture, energy, health, livelihood etc. water management underlies the most basic development challenges. Water is a shared resource that interconnects the environment, food security, generation of energy and many other sectors. Lack of water stifles socio-economic growth of any country. The world will face a shortage of water in the near future and global climate change will exacerbate the problem of water shortage[4]. It has been estimated that in another 15-20 years, the world will be facing a 30% water gap.[5] The global water crisis will affect the capacity of both potable and agricultural water supply to meet the basic needs of living organisms. By the year 2050, global grain production will have to be doubled in order to meet the demand of a growing global population with changing consumption patterns to more protein-based diets at a time of climatic changes. There are large variations in the estimates to what extent water scarcity will impact human and economic development, but the projected rise in the number of people living in water-scarce regions ranges 1-2.5 to 3-9 billion over the next century.[6]
As nearly 90% of global water resources are used for food production, the water crisis will particularly affect agricultural water use and thus food security. The main challenge will therefore is to improve efficiency of agricultural water management in order to produce 50% more food by 2050 to meet global demand. The International Water Management (IWMI) therefore summarized the challenges as “it is possible to produce the food—but it is probable that today’s food production and environmental trends, if continued, will lead to crises in many parts of the world. Only if we act to improve water use in agriculture, we will meet the acute freshwater challenges facing humankind over the coming 50 years”.[7] As Food Security is determined to a great extent by productivity and availability of water, the implementation of appropriate action will solve the coming water crises and food security. Hence, it is sine qua non that effective water management policies are implemented world wide.
Water efficiency
The proportion of water absorbed by a crop and transpired by its leaves is an indication
of productive use of water. This is the water that serves for crop growth resulting in
yields. Therefore, the higher the productively used portion of water, the higher is its
water use efficiency. Therefore, measures need to be taken to achieve higher water use
efficiency . which is the smart use of our water resources through water-saving
technologies. Using water efficiently will help ensure reliable water supplies today and
for future generations.
Generally, in simple irrigation systems water efficacy tends to be less than 50%; ranging
between 30-40%. An increase of water efficiency can be achieved by applying water
saving technologies such as construction of water storage facilities (picture 1) drip
irrigation (picture 2), rainwater harvesting (picture 3), and mulching (picture 4).
Picture 1. Water Storage in a pond in Sri Lanka
Picture 2. Sprinkler irrigation system
Picture 3. Rain water harvesting in Sri Lanka
Picture 4. Reducing evaporation losses by mulching
In addition, cultivation of less water demanding crops, cultivation of crops adapted to
drought, good agricultural practices to manage soil fertility, and reducing land
degradation can increase water efficiency.
Water Scarcity
The impending water crisis as a result of water scarcity is increasingly being recognized
as a growing concern for many countries around the globe. For instance, the World
Economic Forum warns that “Water security (whether it be the challenge of too little
water over long periods of time, or too much water all at once) is one of the most
tangible and fastest-growing social, political and economic challenges faced today. It is
also a fast-unfolding environmental crisis. In every sector, the demand for water is
expected to increase and analysis suggests that the world will face a 40% global
shortfall between forecast demand and available supply by 2030”.[8]
A number of factors cause water scarcity. The degree of water scarcity can vary within a
location as a result of rainfall, topography, nature of soil, insufficient water resources,
lack of or poorly maintained infrastructure; low levels of water resources as a result of
annual or seasonal differences in climate or a range of hydrological or hydro-geological
factors. Water scarcity can also result from the excessive expansion of irrigation areas.
Scarcity can arise if the required infrastructure such as weirs are not available. If the
causes of scarcity can be identified correctly, it could be avoided and/or reduced.
Water conservation
Water conservation increases the available water supply from existing sources to
promote food production. It is also more immediate, significantly less costly and more
energy efficient than developing new sources of water. Water use in food production can
be minimized by a number of methods indicated below.
- Reusing (where high quality water is not needed) and recycling,
- Using water-efficient irrigation systems such as trickle or drip irrigation techniques,
- Reducing evaporation by avoiding midday irrigation, and mulching,
- Growing crops which need less water and drought-resistant.
- Using Rainwater harvesting for irrigation, and cleaning purposes.
- Rehabilitating water harvesting structures such as reservoirs, and
- Storing runoff from rainy periods for use during dry spells by using tanks, ponds, and earth dams.
Water quality
Water quality is a serious concern in nearly all countries, and it is estimated that the total
cost of neglecting it around 3 to 5 percent of GDP in certain countries. Water quality
tends to be affected mainly by salinity found mostly in the tropics. It is time world leaders
recognize the enormity of this problem and start taking necessary actions.[9]
Water Governance
Water Governance[10] is an important aspect in water management. Some prescriptions
for improved water governance include:
- Treating water as an economic good;
- Declaring water a state property and creating water rights;
- Introducing new implementable water laws and policies;
- Establishing effective participatory structures and processes; and
- Managing water at the basin level.
Climate Change
There is ample evidence that climate change will increase hydrologic variability, resulting in extreme weather events such as droughts floods, and major storms. It will continue to have a profound impact on economies, health, lives, and livelihoods. The poorest people will suffer most. The pressures on water resources and hence on food security are
expected to worsen because of climate change.
The probable changes in precipitation and evaporation will translate directly to shifts in the existing pattern of soil moisture deficits, groundwater recharge and runoff. With respect to cropping calendars, the most immediate impacts will be felt by rainfed agriculture whose yield performance is expected to exhibit more volatility as a result of oisture stress in regions with declining rainfall. In areas experiencing increased rainfall and temperature, higher intensity rainfall may damage crops and erode soils.
Relation to Food Security
There is recent evidence that the global food production system is at an unprecedented level of risk due to climate change. The impact of these anticipated hydrological changes on food production will be felt primarily in terms of supply stability. The undesirable consequences of degradation of natural resource systems that once managed to produce large volumes of food staples are now clearly evident in many parts of Asia and Africa. Against a background of degraded agricultural land, diminishing water resources affecting agricultural production has become a key concern. Low water availability due to drought conditions will impair food security. This will increase the vulnerability of marginalized and poor people in both rural and urban areas. Increases in the intensity of rains will experience increased flooding, and landslide affecting food security. Hence, effective implementing appropriate measures to counter the negative effects of climate
change on food security is essential.
References
- ↑ Food and Agriculture Organization (November 1996)."Rome Declaration on Food Security and World Food Summit Plan of Action".
- ↑ United Nations Resolution 217 A, Article 25, 10th December 1948.
- ↑ FAO, (2005) : The state of food insecurity in the world. FAO,fckLRRome (www.fao.org/documents).
- ↑ World Bank (2007): Making the Most of Scarcity: Accountability for Better Water Management Results in the Middle East and North Africa. Washington, USA.
- ↑ Chartres,C and Varma,S. (2010). Out of Water: From Abundance to Scarcity and How to Solve the World's Water Problems, London, Financial Times Prentice Hall.
- ↑ FAO (2012): Coping with water scarcity - An action framework for agriculture and Food Security.
- ↑ Comprehensive Assessment of Water Management in Agriculture. (2007). Water for Food, Water for Life: A Comprehensive Assessment of Water Management in Agriculture. London: Earthscan, and Colombo: International Water Management Institute.)
- ↑ World Economic Forum. (2012). Water. Available online: http://www.weforum.org/issues/water/index.html
- ↑ Cecilia Tortajada and Asit K. Biswas (2013) Water Quality: An Ignored Global Crisis March 21, 2013 http://www.businessweek.com/articles/2013-03-21/water-quality-an-ignored-global-crisis
- ↑ Cecilia Tortajada (2010) Water Governance: Some Critical Issues. Water Resources Development. Vol. 26, No. 2, 297–307, June 2010 http://www.tandfonline.com/doi/pdf/10.1080/07900621003683298fckLR
IPCC. (2001) Climate Change. The Scientific Basis.: Contribution of Working Group I to
the Third Assessment Report of the Intergovernmental Panel on Climate Change
(Houghton, J.T.,Y. Ding, D.J. Griggs, M. Noguer, P.J. van der Linden, X. Dai, K. Maskell,
and C.A. Johnson (eds.)). Cambridge University Press, Cambridge, United Kingdom and
New York, NY, USA, 881pp.
The German International Development Cooperation -GIZ ( 2012) Better Water Use
Efficiency for Increasing Yields and Food Security - from Watershed to Field. Akker, van
den; E.; Compaore, A.; Gandarillas, H.; Hoogendam, P.; Kuylenstierna, J.; Molle, F.,
and Nill, D.
Schmidhuber, J and Tubiello, F. (2007). Global food security under climate change.
Proceedings of the National Academy of Sciences of the United States of America PNAS
104 (50) 19703–19708 http://www.pnas.org/content/104/50/19703.full
Further Reading
Comprehensive Assessment of Water Management in Agriculture. (2007). Water for
Food, Water for Life: A Comprehensive Assessment of Water Management in
Agriculture. London: Earthscan, and Colombo: International Water Management
Institute.
FAO, (2012). Water scarcity and food security. A framework for action
Giordano, Meredith A., Frank Rijsberman, R. Maria Saleth (2006) (eds.): “More Crop per
Drop”: Revisiting a Research Paradigm. Results and Synthesis of IWMI’s Rese UNEP
(2009):
Global Water Forum. (2012). Understanding Water Scarcity. Available online:
http://www.iwmi.cgiar.org/news_room/pdf/Understanding_water_scarcity.pdf
The German International Development Cooperation -GIZ (2013). Effective Agricultural
Water Management February 2013.pdf
The German International Development Cooperation -GIZ (2012): Better Water Use
Efficiency for Increasing Yields and Food Security - from Watershed to Field. Stockholm
Water Week 2012
The German International Development Cooperation –GIZ. (2010): Water Saving
Irrigation. Briefing Note. Division of Rural Development.
R. Taylor. (2010). Rethinking water scarcity: the role of storage. Available
online:http://www.odi.org.uk/sites/odi.org.uk/files/odi-assets/events-
presentations/687.pdf
UNEP (2009). Rainwater harvesting: a lifeline for human well-being. A report prepared
for UNEP by Stockholm Environment Institute. ISBN: 978 - 92 - 807 - 3019 - 7 http://www.unwater.org/downloads/Rainwater_Harvesting_090310b.pdf
Water and Food Security facing global change: what challenges, what solutions ?.
(2012) . This report is the result of analysis and multi-stakeholder discussions,
conducted from September 2010 to January 2012 under the French Water Partnership
(FWP). http://www.avsf.org/public/posts/693/water-and-food-security-facing-global-change-
what-challenges-what-solutions.pdf