DVA4804
Assignment 6
Due 2025
,DVA4804
Assignment 6: Comprehensive Response
Due 2025
1. Impact of Climate Change on Water Security and Food Security Dimensions
Climate change is intensifying the hydrological cycle and increasing the frequency of
extreme weather events, undermining water security worldwide. Higher temperatures
and altered rainfall patterns are causing more severe and prolonged droughts in
drylands, while also accelerating glacial melt and raising flood risksmdpi.comipcc.ch.
For example, warming in many regions is accelerating glacier melting – temporarily
boosting water availability – but long-term glacier loss threatens future water
suppliesmdpi.com. At the same time, heavy precipitation events are becoming more
intense and frequent, flooding infrastructure and farmlandmdpi.comipcc.ch. The IPCC
notes that roughly half the global population already faces severe water scarcity for at
least one month each year, and that water insecurity disproportionately impacts the
poor and vulnerable in low-income countriesipcc.chipcc.ch. In summary, climate change
disrupts both the quantity and reliability of water resources – reducing available fresh
water, degrading its quality, and making supplies more erraticmdpi.comipcc.ch.
These changes in water security have direct knock-on effects on all pillars of food
security – availability, access, utilization (nutrition) – and especially on food system
stability. Declining and more variable water supplies shrink irrigation and crop
productivity. The FAO has warned that “water allocations to agriculture may fall in many
parts of the world due to climate change,” meaning farmers must “produce more with
less water” even as higher temperatures reduce crop yieldsfao.orgfao.org. Observations
in Africa confirm this trend: climate change is already reducing yields of maize and other
staples, eroding food availability, and causing spikes in food pricesipcc.chipcc.ch.
At the household level, water scarcity translates into crop failures and lost harvests,
directly curbing availability of food for families. Lower harvests mean less food to eat or
, sell, and communities dependent on rain-fed agriculture often suffer chronic deficits as
drought and floods alternate.
Food access is also undermined. As water shortages shrink national food production,
countries must import more food, raising global demand and prices, while low-income
households face higher food costs locally. Price hikes from successive climate shocks
have been documented – for example, droughts and floods in Afghanistan have been
shown to “drive up food prices and depress agricultural wages, further exacerbating
food insecurity”openknowledge.worldbank.org. Vulnerable populations – women,
children and the poor – are hit hardest, since they spend a larger share of income on
food and have fewer savingsipcc.ch. Reduced water quality from floods or drought (e.g.
polluted wells, harmful algal blooms) can also impair nutrition and health (food
utilization). Finally, climate-driven water variability threatens the stability of food
supplies. When droughts or storms strike unpredictably, harvests swing wildly from year
to year, undermining long-term food security. For instance, the IPCC notes that crop
losses (and hence food instability) are far greater at 2°C warming than 1.5°C, and that
already at 1.5°C many regions see “substantially” smaller suitable areas for staple
cropsipcc.chipcc.ch. In short, by eroding water availability and reliability, climate change
impairs food production (availability), raises food costs (access), and destabilizes
supply, which together undermine nutrition and food security at all scalesfao.orgipcc.ch.
Assignment 6
Due 2025
,DVA4804
Assignment 6: Comprehensive Response
Due 2025
1. Impact of Climate Change on Water Security and Food Security Dimensions
Climate change is intensifying the hydrological cycle and increasing the frequency of
extreme weather events, undermining water security worldwide. Higher temperatures
and altered rainfall patterns are causing more severe and prolonged droughts in
drylands, while also accelerating glacial melt and raising flood risksmdpi.comipcc.ch.
For example, warming in many regions is accelerating glacier melting – temporarily
boosting water availability – but long-term glacier loss threatens future water
suppliesmdpi.com. At the same time, heavy precipitation events are becoming more
intense and frequent, flooding infrastructure and farmlandmdpi.comipcc.ch. The IPCC
notes that roughly half the global population already faces severe water scarcity for at
least one month each year, and that water insecurity disproportionately impacts the
poor and vulnerable in low-income countriesipcc.chipcc.ch. In summary, climate change
disrupts both the quantity and reliability of water resources – reducing available fresh
water, degrading its quality, and making supplies more erraticmdpi.comipcc.ch.
These changes in water security have direct knock-on effects on all pillars of food
security – availability, access, utilization (nutrition) – and especially on food system
stability. Declining and more variable water supplies shrink irrigation and crop
productivity. The FAO has warned that “water allocations to agriculture may fall in many
parts of the world due to climate change,” meaning farmers must “produce more with
less water” even as higher temperatures reduce crop yieldsfao.orgfao.org. Observations
in Africa confirm this trend: climate change is already reducing yields of maize and other
staples, eroding food availability, and causing spikes in food pricesipcc.chipcc.ch.
At the household level, water scarcity translates into crop failures and lost harvests,
directly curbing availability of food for families. Lower harvests mean less food to eat or
, sell, and communities dependent on rain-fed agriculture often suffer chronic deficits as
drought and floods alternate.
Food access is also undermined. As water shortages shrink national food production,
countries must import more food, raising global demand and prices, while low-income
households face higher food costs locally. Price hikes from successive climate shocks
have been documented – for example, droughts and floods in Afghanistan have been
shown to “drive up food prices and depress agricultural wages, further exacerbating
food insecurity”openknowledge.worldbank.org. Vulnerable populations – women,
children and the poor – are hit hardest, since they spend a larger share of income on
food and have fewer savingsipcc.ch. Reduced water quality from floods or drought (e.g.
polluted wells, harmful algal blooms) can also impair nutrition and health (food
utilization). Finally, climate-driven water variability threatens the stability of food
supplies. When droughts or storms strike unpredictably, harvests swing wildly from year
to year, undermining long-term food security. For instance, the IPCC notes that crop
losses (and hence food instability) are far greater at 2°C warming than 1.5°C, and that
already at 1.5°C many regions see “substantially” smaller suitable areas for staple
cropsipcc.chipcc.ch. In short, by eroding water availability and reliability, climate change
impairs food production (availability), raises food costs (access), and destabilizes
supply, which together undermine nutrition and food security at all scalesfao.orgipcc.ch.
