| |
3.4 Drought risk drivers
The impacts of drought point to
a multitude of drivers that turn
lower than average precipitation,
limited soil moisture and low
water levels into disaster events
for vulnerable populations and
economies. In the absence of
a credible global drought risk
model, case studies from around
the world were commissioned
for this report to identify factors
that increase vulnerability
and exposure, and that could
translate drought hazard into risk
in different situations.
3.4.1 Decreasing rainfall, climate variability and climate change
Rainfall has been decreasing in many regions in the past century. In areas with increasing water stress, even less intense drought episodes are now manifesting as agricultural or hydrological droughts. Areas that are most stressed in normal times will be the first to suffer drought impacts when deficiencies in rainfall occur (Table 3.3).
Table 3.3 Evidence and estimates of climate variability and change as a driver of drought risk
Climate scenarios in India |
Maharashtra, India, is home to nearly 100 million people, with most working in the agriculture sector, mostly in small-scale and marginal farming (ECA, 2009). Agriculture here depends on rainfall for much of its water supply, so even a small decline in precipitation can threaten the food security of millions of people.
An analysis of 22 climate models indicates that droughts that occur once every
25 years may return as often as once every 8 years in the coming decades
(ECA, 2009). |
Small-scale farmers affected by changing climates in sub-Saharan Africa |
The IPCC Fourth Assessment Report reports that in South Africa, net crop revenues may fall by 90 percent by 2100, particularly affecting small-scale farmers (Boko et al., 2007x Boko, M., Niang, I., Nyong, A., Vogel, C., Githeko, A., Medany, M., Osman-Elasha, B., Tabo, R. and Yanda, P. 2007. Africa. In: Climate change 2007: Impacts, adaptation and vulnerability. Contribution of working group II to the fourth assessment report of the intergovernmental panel on climate change, M.L. Parry, O.F. Canziani, J.P. Palutikof, P.J. Van der Linden and C.E. Hanson, eds. Cambridge, UK: Cambridge University Press. . ). Parts of Mali already receive 200 mm less annual rainfall than 50 years ago, and a range of climate scenarios suggests increased drought frequency during the coming decades could reduce agricultural and livestock production by as much as US$300 million per year (ECA, 2009). |
China’s crop losses due to climate variability and change |
Between 2004 and 2007, Chinese farmers lost nearly US$8 billion of crops to drought (McKinsey Climate Change, 2009x McKinsey Climate Change. 2009. From bread basket to dust bowl? Assessing the economic impact of tackling drought in north and northeast China. Beijing, China: McKinsey & Company. . ). In the drought-prone north and north-east, annual crop losses to drought could be 6–7 percent of the total yield by 2030 due to expected decreases in precipitation during critical months of the growing season. In such a scenario, annual drought losses could be as high as US$9 billion in north-eastern China alone (McKinsey Climate Change, 2009x McKinsey Climate Change. 2009. From bread basket to dust bowl? Assessing the economic impact of tackling drought in north and northeast China. Beijing, China: McKinsey & Company. . ). |
3.4.2 Poverty and rural vulnerability
Case studies from all regions confirm the findings from the 2009 Global Assessment Report, that drought risk is intimately linked to poverty and rural vulnerability (Table 3.4) ( UNISDR, 2009x  UNISDR (United Nations International Strategy for Disaster Reduction). 2009. Global assessment report on disaster risk reduction: Risk and poverty in a changing climate. Geneva, Switzerland: United Nations International Strategy for Disaster Reduction. Click here to go to GAR09 page. ). From Brazil and Mexico to India and South Africa, they highlight that poor rural households whose livelihoods depend on rain-fed subsistence agriculture are very exposed and vulnerable to drought and least able to buffer and absorb its impacts. Rural poverty is thus both a cause and a consequence of drought risk. In many places, as the example of the Navajo Nation highlighted, people may have been forced to occupy marginal drought-exposed land, and may be unable to access irrigation technology or drought-resistant seeds that could reduce their vulnerability. Limited access to affordable credit and insurance further constrains their resilience.
Table 3.4 Evidence of poverty and vulnerability as drivers of drought risk
Lack of irrigation
and water
storage in Kenya
and Brazil |
In Kenya’s Mwingi district, 70–80 percent of the population depend on rain-fed
agriculture and livestock production for both food and income, and 60 percent subsist
on US$1 per day or less ( Galu et al., 2010x  Galu, G., Kere, J., Funk, C. and Husak, G. 2010. Case study on understanding food security trends and development of decision-support tools and their impact on vulnerable livelihoods in east Africa. Background paper prepared for the 2011 Global Assessment Report on Disaster
Risk Reduction. Geneva, Switzerland: UNISDR. Click here to view this GAR paper. ). Therefore, when drought occurs it can wipe
out income and investments, leaving communities with limited means to buffer losses.
During the 2008–2009 drought, for example, 70 percent of the population depended on
food aid, and although this relief successfully averted a food security crisis, it reveals the
extreme vulnerability of rural agricultural and agro-pastoral livelihoods ( Galu et al., 2010x  Galu, G., Kere, J., Funk, C. and Husak, G. 2010. Case study on understanding food security trends and development of decision-support tools and their impact on vulnerable livelihoods in east Africa. Background paper prepared for the 2011 Global Assessment Report on Disaster
Risk Reduction. Geneva, Switzerland: UNISDR. Click here to view this GAR paper. ).
In Ceará, Brazil, agricultural drought risk is concentrated amongst smallholder farmers
whose livelihoods depend entirely on rain-fed agriculture, and who do not hold water
rights or have access to irrigation and water-storage infrastructure. As a result, per capita
GDP in such rural communities is only one third of those in urban settlements along
the coast, and Human Development Index values of rural districts are less than 0.65,
compared to 0.70 for Brazil as a whole ( Sávio Martins, 2010x  Sávio Martins, E. 2010. Assessing drought risk and identifying policy alternatives for drought risk management: Ceará, Brazil. Background Paper prepared for the 2011 Global Assessment Report on Disaster
Risk Reduction. Geneva, Switzerland: UNISDR. Click here to view this GAR paper. ; UNDP, 2010x UNDP (United Nations Development Programme). 2010. Human development report 2010: The real wealth of nations: Pathways to human development. New York, USA: United Nations Development Programme. Available at http://hdr.undp.org/en/reports/global/hdr2010/. ). |
Expansion of
intensive cash
crop production
and urbanization
in Mexico |
Mexico’s water management and land tenure policies date back to the 1910 revolution
and are based on communal ownership of land and water by smallholder farmers,
known as ejido, 25 percent of whom live in abject poverty. The expansion of intensive
market agriculture and urbanization has led to the forced sale of water rights, pushing
the rural poor to farm marginal lands more intensively, increasing their drought risk further
still (Fitzhugh and Richter, 2004x Fitzhugh, T. and Richter, B. 2004. Quenching urban thirst: Growing cities and their impacts on freshwater ecosystems. BioScience 54 (8): 741–754. . ). Today, the ejido cannot compete with large farmers
and agribusinesses, and in Sonora their agricultural drought risk is increasing as nearly
75 percent of irrigation water is now allocated to this sector ( Neri and Briones, 2010x  Neri, C. and Briones, F. 2010. Assessing drought risk and identifying policy alternatives for drought risk management. Risks, impacts and social meaning of drought: Characterization of the vulnerability in Sonora, Mexico. Background Paper prepared for the 2010 Global Assessment Report on Disaster Risk Reduction. Geneva, Switzerland: UNISDR. Click here to view this GAR paper. ). |
Limited access
to credit in
Honduras |
In Honduras, 67 percent of the rural population are subsistence farmers, but only
2 percent have access to formal credit, which could facilitate investment in better
equipment and provide protection from drought impacts ( Brenes Torres, 2010x  Brenes Torres, A. 2010. Elementos y patrones constitutivos del riesgo de sequía en América Central. Background paper prepared for the 2011 Global Assessment Report on Disaster
Risk Reduction. Geneva, Switzerland: UNISDR. Click here to view this GAR paper. ). Drought
losses in Honduras and other Central American countries cause increased school
drop-out rates, rural debt, rural-to-urban migration, forced sale of lands, and increased
unemployment ( Brenes Torres, 2010x  Brenes Torres, A. 2010. Elementos y patrones constitutivos del riesgo de sequía en América Central. Background paper prepared for the 2011 Global Assessment Report on Disaster
Risk Reduction. Geneva, Switzerland: UNISDR. Click here to view this GAR paper. ). |
For example, sub-Saharan Africa’s water storage facilities are severely under-developed, with an average per capita storage capacity of 200 cubic metres per year, compared to 1,277 cubic metres for Thailand and 5,961 for North America ( Grey and Sadoff, 2006x Grey, D. and Sadoff, C. 2006. Water for growth and development. Thematic Documents of the IV World Water Forum, Mexico DF, Mexico: Comision Nacional del Agua. . ; Foster and Briceno-Garmendia, 2010x Foster, V. and Briceno-Garmendia, C. 2010. Africa’s infrastructure. A time for transformation. Washington DC, USA: The International Bank for Reconstruction and Development (IBRD) and The World Bank. . ). Averages hide significant variations, however, with Ethiopia and South Africa having storage capacities of 38 and 687 cubic metres, respectively. The total capital needs for the development of adequate water infrastructure in sub-Saharan Africa for 2006–2015 was estimated to be approximately US$15 billion ( Foster and Briceno-Garmendia, 2010x Foster, V. and Briceno-Garmendia, C. 2010. Africa’s infrastructure. A time for transformation. Washington DC, USA: The International Bank for Reconstruction and Development (IBRD) and The World Bank. . ).
For vulnerable rural households, even minor drought episodes can lead to yield losses and can have devastating impacts on already precarious and non-diversified livelihoods. Barely subsisting even in good years, many are unable to mobilize the necessary assets to
buffer losses, and their welfare declines further
still. Such impacts are self-reinforcing. They are
most pronounced in poor communities, and
each drought erodes livelihoods further, leaving
households and communities more vulnerable
to future droughts and other hazards ( Wilhite and Buchanan-Smith, 2005x Wilhite, D.A. and Buchanan-Smith, M. 2005. Drought as hazard: Understanding the natural and social context. Drought and water crises: Science, technology, and management issues. In: D.A. Wilhite, ed. Volume 86. Books in Soils, Plants, and the Environment Series. Boca Raton, USA: Taylor & Francis, . ). At the macro
level, institutions may have little capacity to
provide drought relief or compensation, or may
have little accountability with ethnically and
politically discriminated communities ( Wilhite and Buchanan-Smith, 2005x Wilhite, D.A. and Buchanan-Smith, M. 2005. Drought as hazard: Understanding the natural and social context. Drought and water crises: Science, technology, and management issues. In: D.A. Wilhite, ed. Volume 86. Books in Soils, Plants, and the Environment Series. Boca Raton, USA: Taylor & Francis, . ), with the result
that agricultural drought impacts can turn into
food security crises ( Devereux, 2007x Devereux, S. 2007. The impact of droughts and floods on food security and policy options to alleviate negative effects. Agricultural Economics 37 (s1): 47–58. . ).
3.4.3 Increasing water demand due to urbanization, industrialization and the growth of agribusiness
Urban and economic development per se is
not a driver of drought risk. However, much
development is planned and authorized without
taking water availability into account, or
without taking adequate measures for water
management and conservation (Table 3.5). Case
studies highlight that in already water-stressed
areas and countries, the growth of intensive
agriculture, urban development, tourism and
other economic sectors leads to increased
and conflicting demands for often declining
water resources. This is a key driver of both
hydrological and agricultural drought risk, but
is seldom taken into account in development
planning ( Wilhite and Pulwarty, 2005x Wilhite, D.A. and Pulwarty, R.S. 2005. Drought and water crises: Lessons learned and the road ahead. drought and water crises: Science, technology, and management issues. In: D.A. Wilhite, ed. Volume 86. Books in Soils, Plants, and the Environment Series. Boca Raton, USA: Taylor & Francis. . ).
Table 3.5 Evidence of accelerating water demand as a driver of drought risk
Accelerated water demand in the United States of America |
Phoenix, Arizona, is running dry. Already by the 1940s, demand for water driven by population growth and economic development was outstripping supply (Fitzhugh and Richter, 2004x Fitzhugh, T. and Richter, B. 2004. Quenching urban thirst: Growing cities and their impacts on freshwater ecosystems. BioScience 54 (8): 741–754. . ). The Salt and Verde Rivers were dammed to increase availability but soon both rivers had run dry except after rains. While continuing to draw excessively from the region’s aquifers, Phoenix began to transfer water from the Colorado River in 1980. By 2025, the city’s population is expected to grow by another 50 percent (Fitzhugh and Richter, 2004x Fitzhugh, T. and Richter, B. 2004. Quenching urban thirst: Growing cities and their impacts on freshwater ecosystems. BioScience 54 (8): 741–754. . ), meanwhile, the IPCC Fourth Assessment Report indicates that this region will experience even more frequent and severe droughts (IPCC, 2007x IPCC (Intergovernmental Panel on Climate Change). 2007. Climate change 2007: Impacts, adaptation and vulnerability. Contribution of working group II to the fourth assessment report of the Intergovernmental Panel on Climate Change.Cambridge, UK: Cambridge University Press. . ). |
Impact of economic growth in China |
China’s economic growth has coincided with water shortages in the northern part of the country (WWAP, 2009ax WWAP( World Water Assessment Programme). 2009a. United Nations world water development report 3: Water in a changing world. Paris, France: United Nations World Water Assessment Programme. . ). Between 1949 and 2006, annual water demand in the Yellow River Basin increased from 10 to 37.5 billion cubic metres. This was driven by the expansion of irrigated agriculture which grew in area from 8,000 to 75,000 km2 in the 50 years to 2000, and hydropower plants that now produce 40 TWh per year to meet growing demand from China’s industrial sector (WWAP, 2009bx WWAP (World Water Assessment Programme). 2009b. Case study volume: Facing the challenges, from United Nations World Water Development Report 3: Water in a changing world. Paris, France: United Nations World Water Assessment Programme. . ). The impacts of such growth have made the region highly vulnerable to droughts. In the 1990s, springs in Jinan, “the city of springs”, ran dry and from 1995 to 1998 there was no flow at all in the lowest 700 km of the Yellow River for 120 days of the year (WWAP, 2009bx WWAP (World Water Assessment Programme). 2009b. Case study volume: Facing the challenges, from United Nations World Water Development Report 3: Water in a changing world. Paris, France: United Nations World Water Assessment Programme. . ). |
The effects of a growing leisure and tourism industry in Spain and the Caribbean |
Per capita water use in the tourism industry is often 3 to 10 times greater than local demand (Fernandez and Graham, 1999x Fernandez, B. and Graham, L. 1999. Sustainable economic development through integrated water resources management. Panama City, Panama: Water Center for the Humid Tropics of Latin America and the Caribbean (CATHALAC). . ), and overall consumption by the tourism sector is increasing dramatically (Iglesias et al., 2007x Iglesias, A., Garrote, L., Flores, F. and Moneo, M. 2007. Challenges to manage the risk of water scarcity and climate change in the Mediterranean. Water Resources Management 21 (5): 755–788. . ; Farrell et al., 2010x  Farrell, D., Trotman, A. and Cox, C. 2010. Drought early warning and risk reduction: A case study of the drought of 2009–2010. Background paper prepared for the 2011 Global Assessment Report on Disaster
Risk Reduction. Geneva, Switzerland: UNISDR. Click here to view this GAR paper. ). As competition for water increases, it is often agriculture that loses out.
In Spain, second homes and golf courses, alone, have increased water demand by 30 million cubic metres per year (Iglesias et al., 2007x Iglesias, A., Garrote, L., Flores, F. and Moneo, M. 2007. Challenges to manage the risk of water scarcity and climate change in the Mediterranean. Water Resources Management 21 (5): 755–788. . ). Additionally, tourism leads to large seasonal variations in water use that can lead to hydrological droughts in peak seasons, often coinciding with drier, sunnier periods ( Farrell et al., 2010x  Farrell, D., Trotman, A. and Cox, C. 2010. Drought early warning and risk reduction: A case study of the drought of 2009–2010. Background paper prepared for the 2011 Global Assessment Report on Disaster
Risk Reduction. Geneva, Switzerland: UNISDR. Click here to view this GAR paper. ). In the Mediterranean, the seasonal tourism industry increases overall annual water demand by at least 5–20 percent in affected communities (Iglesias et al., 2007x Iglesias, A., Garrote, L., Flores, F. and Moneo, M. 2007. Challenges to manage the risk of water scarcity and climate change in the Mediterranean. Water Resources Management 21 (5): 755–788. . ; WWAP, 2009ax WWAP( World Water Assessment Programme). 2009a. United Nations world water development report 3: Water in a changing world. Paris, France: United Nations World Water Assessment Programme. . ).
In Mallorca, the annual number of tourists almost doubled from 1989 to 2000 to 8 million, outnumbering the local population by more than 10 to 1. This meant that during the drought in the mid-1990s, the Government of Spain was forced to ship freshwater from the mainland at a cost of €42 million (Garcia and Servera, 2003x Garcia, C. and Servera J. 2003. Impacts of tourism development on water demand and beach degradation on the island of Mallorca (Spain). Geografiska Annaler: Series A, Physical Geography 85 (3–4): 287–300. . ; Iglesias, 2007x Iglesias, A., Garrote, L., Flores, F. and Moneo, M. 2007. Challenges to manage the risk of water scarcity and climate change in the Mediterranean. Water Resources Management 21 (5): 755–788. . ).
In the eastern Caribbean, many islands are already water scarce, with less than 1,000 cubic metres of water per capita per year. However, the 2009–2010 agricultural drought was due less to lack of rainfall than to restrictions imposed on agriculture as water was allocated to other sectors ( Farrell et al., 2010x  Farrell, D., Trotman, A. and Cox, C. 2010. Drought early warning and risk reduction: A case study of the drought of 2009–2010. Background paper prepared for the 2011 Global Assessment Report on Disaster
Risk Reduction. Geneva, Switzerland: UNISDR. Click here to view this GAR paper. ). |
Competition for freshwater already exists and
it is expected to increase as water demand
continues to grow, alongside population
growth and economic development. These
two processes determine the relationship
between water supply and water demand to
a much greater degree than climate change
( Vörösmarty et al., 2000x Vörösmarty, C.J., Green, P., Salisbury, J. and Lammers, R.B. 2000. Global water resources: Vulnerability from climate change and population growth. Science 289 (5477): 284–288. . ). Total global annual
water demand has tripled since 1960, and is
currently increasing by 64 billion cubic metres
every year ( WWAP, 2009ax WWAP( World Water Assessment Programme). 2009a. United Nations world water development report 3: Water in a changing world. Paris, France: United Nations World Water Assessment Programme. . ). This growth has not
happened evenly. Developed countries consume
more water per capita than most developing countries (Figure 3.9), and global trade has allowed some countries to externalize their water consumption. For example, Europe is a large importer of cotton, a water-intensive crop grown in many water scarce regions, defined as those with less than 1,700 cubic metres of water per person per year ( WWAP, 2009ax WWAP( World Water Assessment Programme). 2009a. United Nations world water development report 3: Water in a changing world. Paris, France: United Nations World Water Assessment Programme. . ). By 2025, 1.8 billion people will live in countries or regions with water scarcity, and by 2030 nearly half of the world’s population will live in areas with high water stress ( UN-WATER, 2007; OECD, 2008x OECD. 2008. OECD environment outlook to 2030. Paris, France: Organization for Economic Co-operation and Development. . ).
Demand for industrial water use tends to increase with relative wealth. It can rise from less than 10 percent of total national demand in low- and middle-income countries to nearly 60 percent in high-income countries ( WWAP, 2009ax WWAP( World Water Assessment Programme). 2009a. United Nations world water development report 3: Water in a changing world. Paris, France: United Nations World Water Assessment Programme. . ). Economic development, and tourism in particular, increases competition for water resources often in already water-stressed areas such as southern Spain or the eastern Caribbean.
Evidence indicates that the world has become increasingly dry during the past century. Certainly since
the 1970s, aridity has increased in parts of Africa, southern Europe, East and South Asia and eastern
Australia, shifting baseline precipitation data and further complicating the ability to monitor droughts
( Trenberth et al., 2007x Trenberth, K.E., Jones, P.D., Ambenje, P., Bojariu, R., Easterling, D., Klein Tank, A., Parker, D., Rahimzadeh, F., Renwick, J.A., Rusticucci, M., Soden, B. and Zhai, P. 2007. Observations: Surface and atmospheric climate change. Climate change 2007: The physical science basis. Contribution of working group I to the fourth assessment report of the intergovernmental panel on climate change.Cambridge, UK: Cambridge University Press. . ; Dai, 2010x Dai, A. 2010. Drought under global warming: A review. Wiley Interdisciplinary Reviews: Climate Change 2 (1): 45–65. . ). For example, from the 1950s to the 1980s, the percentage of the
land surface classified as ‘dry’ was 10–14 percent, rising to 25–30 percent during the past decade ( Dai, 2010x Dai, A. 2010. Drought under global warming: A review. Wiley Interdisciplinary Reviews: Climate Change 2 (1): 45–65. . ). One reason is that warmer air and surface temperatures have increased evaporation.
Century-long global precipitation trends measured using the monthly Palmer Drought Severity Index
(Figure 3.8) reveal a general drying trend in Sahelian and southern Africa, central Brazil, southern
Europe, Iran (Islamic Republic of), Indonesia, north-east China, and north-east Australia ( Trenberth et al., 2007x Trenberth, K.E., Jones, P.D., Ambenje, P., Bojariu, R., Easterling, D., Klein Tank, A., Parker, D., Rahimzadeh, F., Renwick, J.A., Rusticucci, M., Soden, B. and Zhai, P. 2007. Observations: Surface and atmospheric climate change. Climate change 2007: The physical science basis. Contribution of working group I to the fourth assessment report of the intergovernmental panel on climate change.Cambridge, UK: Cambridge University Press. . ).
Figure 3.8 Global precipitation
trends since 1900
measured using
the Palmer Drought
Severity Index
(PDSI)
(Source: Adapted by UNISDR from Dai et al., 2004)
Figure 3.9 Average national
water consumption
per capita (1997–
2001)
(Source: Hoekstra and Chapagain, 2008 (modified and cited in WWAP, 2009ax WWAP( World Water Assessment Programme). 2009a. United Nations world water development report 3: Water in a changing world. Paris, France: United Nations World Water Assessment Programme. . ))
3.4.4 Inappropriate soil and water management
Agricultural droughts have been recorded in parts of Bangladesh where mean annual rainfall is 2,300 mm, in Lao People’s Democratic Republic where rainfall is 3,200 mm, and in Cambodia where an SPI of +2.7 corresponds to an excess of water and potential flooding ( Shaw et al., 2010x Shaw, R., Nguyen, H., Habiba, U. and Takeuchi, Y. 2010. Drought in Asian Monsoon region. Background Paper prepared for the 2011 Global Assessment Report on Disaster
Risk Reduction. Geneva, Switzerland: UNISDR. . ). However, Table 3.6 shows that precipitation and SPI values do not reflect water availability in reservoirs, rivers and canal systems, highlighting once again why meteorological drought is not always an accurate indicator of drought hazard.
Table 3.6 Evidence of inappropriate water and soil management as drivers of drought risk
Introduction of water-intensive crops in Saudi Arabia |
In the 1970s, the Government of Saudi Arabia instituted a policy of self-sufficiency in wheat production and subsidized production accordingly. From 1972 to 1991, land used for agricultural production grew from 0.4 million to 1.6 million hectares (Saudi Arabia, 1992x Saudi Arabia, Government of. 1990. Fifth development plan. Riyadh, Saudi Arabia: Ministry of Planning. . ), and by the early 1990s it had become the world’s sixth-largest wheat producer. In 1992, domestic wheat production of 4.25 million tonnes easily surpassed national demand of 1.22 million tonnes (Abderrahman, 2001; Karam, 2008). This depended upon irrigation and extraction of ground water that from 1980 to 1992 grew from 1,850 to 29,826 million cubic metres per year (Saudi Arabia, 1990x Saudi Arabia, Government of. 1992. Agricultural statistical year book. Volume 7.Riyadh, Saudi Arabia: Ministry of Agriculture and Water. . ; Dabbagh and Abderrahman 1997x Dabbagh, A. and Abderrahman, W. 1997. Management of groundwater resources under various irrigation water use scenarios in Saudi Arabia. Arabian Journal of Science and Engineering 22: 47–64. . ), threatening the country with unprecedented drought. The wheat self-sufficiency policy became so expensive and drained aquifers so dramatically that it was eventually abandoned. Saudi Arabia now intends to depend completely on imported wheat by 2016 (Karam, 2008). |
Shifting production patterns and deforestation in Viet Nam |
Rainfall in the Ninh Thuan province of Viet Nam has been increasing over time. Droughts have become more common, however, because rainfall is becoming more variable and demand for water is increasing, and is expected to increase, in every sector of the economy (Shaw et al., 2010x Shaw, R., Nguyen, H., Habiba, U. and Takeuchi, Y. 2010. Drought in Asian Monsoon region. Background Paper prepared for the 2011 Global Assessment Report on Disaster
Risk Reduction. Geneva, Switzerland: UNISDR. . ). Agricultural demand is the largest contributor to water withdrawals, and is predicted to grow by 150 percent between 2015 and 2020, while demand for aquaculture, industry and environment needs will double. Deforestation and shifting production patterns (e.g., more shrimp farming) have further reduced supply and increased demand. In the past 40 years, per capita annual water availability in Ninh Thuan has fallen from 17,000 to 4,600 cubic metres (Tinh, 2006x Tinh, D.N. Coping with drought in the central highlands - Vietnam, institute of environment and resource. Lyngby, Denmark: Technical University of Denmark. . ), leading to a ‘water war’ between agriculture, aquaculture, industry and tourism. |
Overgrazing and rangeland management in Mexico |
The management of rangeland is equally challenging for effective drought risk management. Many ranchers overgraze, and in Sonora, Mexico, herd sizes may be double to triple the carrying capacity of the land ( Neri and Briones, 2010x  Neri, C. and Briones, F. 2010. Assessing drought risk and identifying policy alternatives for drought risk management. Risks, impacts and social meaning of drought: Characterization of the vulnerability in Sonora, Mexico. Background Paper prepared for the 2010 Global Assessment Report on Disaster Risk Reduction. Geneva, Switzerland: UNISDR. Click here to view this GAR paper. ). This problem was observed in the Navajo Nation despite restrictions on herd size, which has as much to do with choice of livestock as the environmental conditions ( Redsteer et al., 2010x  Redsteer, M.H., Kelley, K.B., Francis, H. and Block, D. 2010. Disaster risk assessment case study: Recent drought on the Navajo nation, southwestern United States. Background Paper prepared for the 2011 Global Assessment Report on Disaster
Risk Reduction. Geneva, Switzerland: UNISDR. Click here to view this GAR paper. ). |
3.4.5 Weak or ineffective risk governance
Case studies highlighted weak or ineffective risk governance capacities to address drought risks, and few countries besides Australia and India have developed national drought risk policies or frameworks (Table 3.7). Progress is nonetheless being made in drought risk management, especially in forecasting, early warning, preparedness, response and the development of compensatory mechanisms such as insurance and temporary employment programmes. Early warning is a crucial component of drought risk management, and seasonal forecasts and climate models inform decisions about what and when to plant. However, insurance and risk transfer mechanisms may not always be available to poor rural households who most need them to offset their risks. Also, compensatory measures like
drought relief may actually reward poor resource management and punish planners who employ proactive drought mitigation policies that leave them ineligible for assistance ( Wilhite and Pulwarty, 2005x Wilhite, D.A. and Pulwarty, R.S. 2005. Drought and water crises: Lessons learned and the road ahead. drought and water crises: Science, technology, and management issues. In: D.A. Wilhite, ed. Volume 86. Books in Soils, Plants, and the Environment Series. Boca Raton, USA: Taylor & Francis. . ).
Table 3.7 Evidence of low risk governance capacity as a driver of drought risk
Low priority
given to drought
by governments
in Mexico |
Of the 16 million hectares of agricultural land in Sonora, Mexico, 87 percent are rain-fed
and highly vulnerable to agricultural drought and account for 70 percent of agricultural
production (Neri, 2004x Neri, C. 2004. Evaluación del riesgo en el sector agrícola ante la variabilidad climática. Thesis.México DF, Mexico: . ; Neri and Briones, 2010x  Neri, C. and Briones, F. 2010. Assessing drought risk and identifying policy alternatives for drought risk management. Risks, impacts and social meaning of drought: Characterization of the vulnerability in Sonora, Mexico. Background Paper prepared for the 2010 Global Assessment Report on Disaster Risk Reduction. Geneva, Switzerland: UNISDR. Click here to view this GAR paper. ). Nevertheless, there is no drought
early warning system or any systematic recording of drought impacts. A stakeholder
survey revealed that this was not due to a lack of meteorological data or an inability to
create seasonal drought forecasts, but reflected the low priority given by the authorities
to drought risk management and poor rural communities ( Neri and Briones, 2010x  Neri, C. and Briones, F. 2010. Assessing drought risk and identifying policy alternatives for drought risk management. Risks, impacts and social meaning of drought: Characterization of the vulnerability in Sonora, Mexico. Background Paper prepared for the 2010 Global Assessment Report on Disaster Risk Reduction. Geneva, Switzerland: UNISDR. Click here to view this GAR paper. ). In
Sonora, there is no drought risk management policy framework, and issues such as water
resources and rangeland management fall through the cracks between the civil protection
authorities who focus on emergency response, and other government departments. |
Fragmented
responsibilities
for drought risk
management in
Viet Nam |
In Viet Nam, government institutions address the risks associated with annual floods
and tropical cyclones, but they are less well equipped to reduce and manage drought
risks. Responsibility for drought risk is centralized within the national government, but
the management of drought risk drivers falls between different institutions responsible for
managing forests, agriculture, water and land use (Shaw et al., 2010x Shaw, R., Nguyen, H., Habiba, U. and Takeuchi, Y. 2010. Drought in Asian Monsoon region. Background Paper prepared for the 2011 Global Assessment Report on Disaster
Risk Reduction. Geneva, Switzerland: UNISDR. . ). |
Weak local
drought risk
governance
capacities in
Bangladesh |
North-western Bangladesh receives 1,329 mm of rainfall per year, half the national
average, and is prone to frequent droughts which local governments are mostly illequipped
to manage. Drought risk relates to household resilience, but also to the
institutional capacity of local governments. The local governments of Tanore and Shibganj
have very low institutional resilience. They have not incorporated drought risk into disaster
management plans, not developed effective drought risk management policies, training
or demonstration programmes, and have weak coordination with other government
institutions and NGOs (Shaw et al., 2010x Shaw, R., Nguyen, H., Habiba, U. and Takeuchi, Y. 2010. Drought in Asian Monsoon region. Background Paper prepared for the 2011 Global Assessment Report on Disaster
Risk Reduction. Geneva, Switzerland: UNISDR. . ; Habiba et al., 2011). Even during droughts,
local disaster management committees in these sub-districts have not engaged in public
awareness programmes or run household level disaster drills. |
Conflict and
excess water use
in Morocco |
The lack of effective drought risk management is often aggravated by inadequate
institutional and financial capacities, particularly in local government (Shaw et al., 2010x Shaw, R., Nguyen, H., Habiba, U. and Takeuchi, Y. 2010. Drought in Asian Monsoon region. Background Paper prepared for the 2011 Global Assessment Report on Disaster
Risk Reduction. Geneva, Switzerland: UNISDR. . ). To
manage scarce groundwater more efficiently during droughts, Morocco enacted a series of
reforms, which included the privatization of water rights during the 1990s. The new policies
conflicted with tribal customs and religious views and, due to the government’s inability to
ensure compliance, overexploitation of groundwater continued (Doukkali, 2005x Doukkali, M.R. 2005. Water institutional reforms in Morocco. Water Policy 7: 71–88. . ). |
Note
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