ISciences Worldwide Water Watch List April 2017

14 April 2017

This map presents a selection of regions likely to encounter significant water anomalies during the one year period beginning in January 2017 and running through December 2017 using 3 months of observed temperature and precipitation data and 9 months of forecast data.

The synopsis that follows provides highlights of regional water forecasts. Regional details are available in ISciences Global Water Monitor & Forecast April 14, 2017 (pdf).

United States: Severe to exceptional water deficits will continue to emerge in the South and South Atlantic states through September, with moderate deficits in the Northeast and in the Ohio River Valley, though deficits are expected to diminish somewhat in severity after June. Moderate deficits may emerge on the Arkansas and Colorado Rivers and moderate to severe deficits in northern Colorado from June through September. Exceptional surpluses are forecast to persist in Idaho through June, along with surpluses of varying intensity in the Pacific Northwest and California. After June the extent and severity of these surpluses is forecast to diminish.

Canada: Widespread severe to exceptional water deficits are forecast through September in much of Quebec, along its border into Ontario, around Hudson Bay in Manitoba, and in central and northwestern regions of Alberta and British Columbia. Large pockets of exceptional surpluses are expected to persist through June in southeastern British Columbia, northwestern Saskatchewan into Alberta, and in central Manitoba. These surpluses are expected to diminish after June.

Mexico, Central America, and the Caribbean: Exceptional water deficits are expected to nearly disappear in Mexico April through June, with moderate deficits persisting in Chiapas and Tabasco. Severe to exceptional deficits are forecast to emerge in the Baja Peninsula and Sonora and moderate deficits will emerge in Guatemala. From July through September moderate to extreme deficits are forecast to re-emerge in southern Mexico, persist in northern Baja, and emerge in Guatemala, El Salvador, western Honduras, western Nicaragua, northern Costa Rica, and Jamaica.

South America: Though the extent of water deficits in South America is expected to shrink somewhat April through June, deficits remain in the forecast for many areas including central and eastern states of Brazil, Bolivia’s northern border, coastal Peru from Lima south, northern Chile, and southernmost Patagonia. Surpluses are forecast in western Buenos Aires Province, Argentina into La Pampa Province, and Neuquén Province. From July through September deficits are forecast for much of the northern half of South America as deficits persist in Brazil and emerge from Colombia through French Guiana.

Europe: Water deficits of varying severity are expected to prevail in much of Europe through September with exceptional deficits forecast for southern Sweden, Finland, Estonia, Latvia, and Denmark. Other countries where deficits are expected to be intense include Netherlands, Belgium, Luxembourg, Germany, Austria, Slovenia, Croatia, Albania, and Macedonia. The intensity of deficits is expected to decrease slightly after June.

Africa: Widespread exceptional water deficits are forecast to emerge across northern Africa from April through June; deficits of lesser severity are forecast across Africa’s mid-section. Deficits in the Horn of Africa, DRC, and Angola are expected to downgrade to primarily moderate severity. Surpluses are expected in southeast Sudan into South Sudan, southeastern Tanzania, western Zambia, the Okavango Delta in northern Botswana, Zimbabwe, northern South Africa, and northern Madagascar. After June deficits across northern Africa are forecast to recede slightly overall, but severe to exceptional deficits are expected to emerge in southern Somalia, and moderate to severe deficits may emerge in northeast Namibia.

Middle East: Severe to exceptional water deficits are forecast to emerge April through June in: Saudi Arabia, Iraq west of the Euphrates, Qatar, United Arab Emirates, eastern Oman into southern coastal Iran, Jordan, Lebanon, West Bank, Israel, and eastern Cypress. Deficits in Yemen are expected to downgrade but remain severe and widespread. Deficits of varying severity are expected to persist in some areas of Turkey, and moderate deficits are forecast for central Iran. Surpluses are forecast in southern Iran from the Persian Gulf east into Kerman Province.

Central Asia and Russia:  Widespread and exceptional water deficits observed in Russia in the prior three months are forecast to retreat April through June. However, drier than normal conditions will persist from the White Sea to the Lena River. Surpluses are forecast from the Irtysh to the Tom River, along the Middle Ob River, and between the Volga River and the Belaya River. Surpluses will continue to emerge in the many areas of Kazakhstan as well as in Kyrgyzstan, eastern Uzbekistan, and western Tajikistan. Moderate deficits are forecast for western Uzbekistan and parts of Turkmenistan.

South Asia: Severe to exceptional water deficits are forecast to emerge April through June across central and southern India. Deficits will also emerge near Karachi, Pakistan and will continue to emerge in western Pakistan. Surpluses are forecast in Jammu and Kashmir, eastern Afghanistan, and along the northern Indus River in Pakistan. From July through September deficits in India will decrease in intensity but increase in extent as deficits emerge in the Chambal River watershed. Severe to extreme deficits will persist in Madhya Pradesh. Moderate to severe deficits are also forecast to emerge throughout Bangladesh.

Southeast Asia and the Pacific: From April through June water deficits are forecast to emerge on Java, southern Sumatra, and southern Borneo, but will recede in Cambodia except for a pocket of exceptional deficits northeast of Tonlé Sap. Surpluses are forecast for central Vietnam, the Malay Peninsula, northern Sumatra, northeast Borneo, and Mindanao. After June, deficits are forecast for most of the region, with severe to exceptional deficits in Malaysia, Indonesia, Papua New Guinea, and eastern Mindanao.

East Asia: A return to normal water conditions is forecast for Southeast China from April through June – a change from surpluses observed in prior months. Deficits are forecast to emerge in South Korea, Japan, Northeast China, the Shandong Peninsula, Henan, and Shaanxi. Severe to exceptional deficits will persist in southern Mongolia, western Inner Mongolia, the Tarim Basin and eastern Dzungaria regions of southern Xinjiang, and southern Liaoning. Surpluses are forecast for northern Sichuan and much of Qinghai. The forecast for July through September indicates the persistence of deficits in western Inner Mongolia and Mongolia, and the emergence of deficits in the Sichuan Basin.

Australia: The April through June outlook indicates significant improvement as widespread and exceptional water anomalies are no longer evident in the forecast for South Australia, Queensland, and New South Wales. However, severe to exceptional deficits are expected to emerge throughout Tasmania and in Western Australia. Moderate deficits are forecast for central Australia, New Caledonia, and southern South Island, New Zealand. Surpluses will continue to emerge in eastern Queensland, and surpluses in the Kimberley Plateau in the northwest will diminish. After June primarily mild deficits will prevail over most of the country, with more severe deficits in eastern Tasmania, Western Australia, and in the north near Darwin.

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Many analyses reported in ISciences-authored blog posts are based on data generated by the ISciences Water Security Indicator Model (WSIM). Other sources, if used, are referenced in footnotes accompanying individual posts. WSIM is a validated capability that produces monthly reports on current and forecast global freshwater surpluses and deficits with lead times of 1-9 months at 0.5°x0.5° resolution. This capability has been in continuous operation since April 2011 and has proven to provide reliable forecasts of emerging water security concerns in that time-frame. WSIM has the ability to assess the impacts of water anomalies on people, agriculture, and electricity generation. Detailed data, customized visualizations, and reports are available for purchase.

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