233 datasets found

To help determine where watershed conservation can help secure water for cities, we estimated the effectiveness of five common conservation strategies: land protection, reforestation, riparian restoration, agricultural best management practices, and forest fuel reduction. For each strategy, we evaluated how effectively it reduces sedimentation and nutrient pollution in more than 2,000 source watersheds that serve over 500 cities. This map shows the potential of cities to do so in four categories: <10km2 is “High”, 10-100km2 is “Medium”, > 100km2 is “Low”. Note that cities that predominately (>0.5) use something other than surface water, or cities that get the significant majority of their water (>0.66) from sources that this strategy cannot help, are classified as “Insufficient scope”.For more information, access the Urban Water Blueprint report here: http://www.iwa-network.org/wp-content/uploads/2016/06/Urban-Water-Blueprint-Report.pdfYou can also visit the Urban Water Blueprint website here: http://water.nature.org/waterblueprint/#/intro=true

The use of the land covering the watersheds have an enormous impact in the cost and treatment of the water, as well as for the availability and quality of the water supply. Globally, a watershed is covered by 40 percent of forestall area, 30 percent of cropland and 20 percent of grassland and pasture; but it will vary from country to country. This footprint analysis involve 534 cities, who draw water from 20 percent of the world’s land surface.For more information, access the Urban Water Blueprint report here: http://www.iwa-network.org/wp-content/uploads/2016/06/Urban-Water-Blueprint-Report.pdfYou can also visit the Urban Water Blueprint website here: http://water.nature.org/waterblueprint/#/intro=true

In cases were the watersheds are exploited for intensive agricultural purposes, as consequence the fertilizer concentration increase. Thus, the fertilizer filters into the water and rise the accumulation of common nutrients, phosphorus and nitrogen, affecting their proper cycle. Around 384 million urbanities receive their drinking water from watersheds with high nutrient pollution. For more information, access the Urban Water Blueprint report here: http://www.iwa-network.org/wp-content/uploads/2016/06/Urban-Water-Blueprint-Report.pdfYou can also visit the Urban Water Blueprint website here: http://water.nature.org/waterblueprint/#/intro=true

To help determine where watershed conservation can help secure water for cities, we estimated the effectiveness of five common conservation strategies: land protection, reforestation, riparian restoration, agricultural best management practices, and forest fuel reduction. For each strategy, we evaluated how effectively it reduces sedimentation and nutrient pollution in more than 2,000 source watersheds that serve over 500 cities. This map shows the potential of cities to do so in four categories: <10km2 is “High”, 10-100km2 is “Medium”, > 100km2 is “Low”. Note that cities that predominately (>0.5) use something other than surface water, or cities that get the significant majority of their water (>0.66) from sources that this strategy cannot help, are classified as “Insufficient scope”.For more information, access the Urban Water Blueprint report here: http://www.iwa-network.org/wp-content/uploads/2016/06/Urban-Water-Blueprint-Report.pdfYou can also visit the Urban Water Blueprint website here: http://water.nature.org/waterblueprint/#/intro=true

The use of the land covering the watersheds have an enormous impact in the cost and treatment of the water, as well as for the availability and quality of the water supply. Globally, a watershed is covered by 40 percent of forestall area, 30 percent of cropland and 20 percent of grassland and pasture; but it will vary from country to country. This footprint analysis involve 534 cities, who draw water from 20 percent of the world’s land surface.For more information, access the Urban Water Blueprint report here: http://www.iwa-network.org/wp-content/uploads/2016/06/Urban-Water-Blueprint-Report.pdfYou can also visit the Urban Water Blueprint website here: http://water.nature.org/waterblueprint/#/intro=true

This layer identifies if any water was available at the water point on the day of the visit (recognizing that it may be a limited flow) in Nicaragua. Data was gathered from the Water Point Data Exchange (WPDx) platform, a tool established for sharing water point data throughout the global water sector. The goal of the Water Point Data Exchange is to simplify the way water point data is shared so all stakeholders can work more efficiently.For more information, visit the WPDx website at https://www.waterpointdata.org/

This layer presents the Water Poverty Index (WPI) in 141 countries around the world. The WPI is a water management tool that expresses an interdisciplinary measure which links household welfare with water availability and indicates the degree to which water scarcity impacts on human populations. It is calculated using 5 components: resources, access, capacity, use, environment. The WPI combines measures of water availability and access with the people’s capacity to access water. People can be considered as « water poor » if the water is not enough available for their basic needs (they may have to walk a long way to get it or supplies may be limited) or if people can’t access to water even if it is available (for example if they can’t afford to pay for it).For more information, see the paper: http://econwpa.repec.org/eps/dev/papers/0211/0211003.pdf

Mean annual groundwater recharge depth is calculating by dividing the long-term mean groundwater recharge, including man-made components (returnflows, induced recharge, artificial recharge), by surface area of the whole aquifer. Indicator is expressed as mm/yr.For more information, visit the Transboundary Water Assessment Programme Portal on groundwater: https://ggis.un-igrac.org/ggis-viewer/viewer/twap/public/default

Defined as the amount and percentage of ODA that is included in a government coordinated spending plan, whether on treasury or on budget. ODA flows are official financing with the main objective of promoting economic development and welfare of developing countries; they are concessional in character with a grant element of at least 25%. By convention, ODA flows comprise contributions from donor government agencies, at all levels, to developing countries, either bilaterally or through multilateral institutions. A government coordinated spending plan is defined as a financing plan/budget for water and sanitation projects, clearly assessing the available sources of nance and strategies for nancing future needs.

This layer presents the number of water sources (surface and non-surface) from which cities around the world harvest water. On average, cities retrieve water from 4 different sources. Note that if a city gets a small fraction of its water from surface water, there will be calculated values for this metric, but it is not particularly meaningful for a city's water risk or opportunity profile.For more information, access the Urban Water Blueprint report here: http://www.iwa-network.org/wp-content/uploads/2016/06/Urban-Water-Blueprint-Report.pdfYou can also visit the Urban Water Blueprint website here: http://water.nature.org/waterblueprint/#/intro=true

This layer identifies if any water was available at the water point on the day of the visit (recognizing that it may be a limited flow) in Mexico. Data was gathered from the Water Point Data Exchange (WPDx) platform, a tool established for sharing water point data throughout the global water sector. The goal of the Water Point Data Exchange is to simplify the way water point data is shared so all stakeholders can work more efficiently.For more information, visit the WPDx website at https://www.waterpointdata.org/

This layer identifies if any water was available at the water point on the day of the visit (recognizing that it may be a limited flow) in Honduras. Data was gathered from the Water Point Data Exchange (WPDx) platform, a tool established for sharing water point data throughout the global water sector. The goal of the Water Point Data Exchange is to simplify the way water point data is shared so all stakeholders can work more efficiently.For more information, visit the WPDx website at https://www.waterpointdata.org/

Ratio between total freshwater withdrawn by all economic activities (based on ISIC categories) and total renewable freshwater resources, after taking into account environmental water requirements (also known as water withdrawal intensity). This indicator includes water withdrawals by all economic activities, focusing on agriculture, manufacturing, electricity, and water collection, treatment and supply.

Groundwater vulnerability is a natural property of a groundwater system that depends on the sensitivity of the system to human impacts. Data on this complex indicator are very scarce.For more information, visit the Transboundary Water Assessment Programme Portal on groundwater: https://ggis.un-igrac.org/ggis-viewer/viewer/twap/public/default

The average distance to surface diversion sources is expressed in kilometers. Today, cities are looking farther beyond their limits for clean water. On average, cities retrieve surface water from an average distance of 57.86 km.Note that if a city gets a small fraction of its water from surface water, there will be calculated values for this metric, but it is not particularly meaningful for a city's water risk or opportunity profile.For more information, access the Urban Water Blueprint report here: http://www.iwa-network.org/wp-content/uploads/2016/06/Urban-Water-Blueprint-Report.pdfYou can also visit the Urban Water Blueprint website here: http://water.nature.org/waterblueprint/#/intro=true

A city with a population in excess of 10 million is defined by the UN as a Megacity. The International Hydrological Programme of UNESCO has established the Megacities Alliance for Water and Climate Change to support the exchange of knowledge and best practices in delivering sustainable water and sanitation services in view of Climate Change. Creative Cities, intend to foster international cooperation with and between cities committed to investing in creativity as a driver for sustainable urban development, social inclusion and cultural vibrancy. Inclusive and Sustainable Cities are interested in sharing experiences in order to improve their policies to fight racism, discrimination, xenophobia and exclusion; and Learning cities provide inspiration, know-how and best practices in matter of international policy. The map presents the Cities UNESCO’s Sectors are supporting in their efforts to enhance knowledge exchange and achieve the SDGs of the 2030 Sustainable Agenda.

This layer presents estimations of the mean annual water footprint of national consumption per capita for the period 1996-2005. The water footprint is a measure of human’s appropriation of freshwater resources; it has three components: green, blue and grey. Estimations are given in cubic meter per capita per year. In the table, data are also available disaggregated per sectors: agricultural production, industrial production and domestic water use.A detailed description of the methodology and results can be found in the main report available here: http://temp.waterfootprint.org/Reports/Report50-NationalWaterFootprints-Vol1.pdf . For more information, visit the Water Footprint Network website: http://temp.waterfootprint.org/?page=files/WaterStat

This layer shows the percentage of water sourced from watershed(s) outside the watershed within which a given city resides. On average, cities secure 43% of their water supply via intebasin transfers. Note that if a city gets a small fraction of its water from surface water, there will be calculated values for this metric, but it is not particularly meaningful for a city's water risk or opportunity profile.For more information, access the Urban Water Blueprint report here: http://www.iwa-network.org/wp-content/uploads/2016/06/Urban-Water-Blueprint-Report.pdfYou can also visit the Urban Water Blueprint website here: http://water.nature.org/waterblueprint/#/intro=true

This layer identifies if any water was available at the water point on the day of the visit (recognizing that it may be a limited flow) in Honduras. Data was gathered from the Water Point Data Exchange (WPDx) platform, a tool established for sharing water point data throughout the global water sector. The goal of the Water Point Data Exchange is to simplify the way water point data is shared so all stakeholders can work more efficiently.For more information, visit the WPDx website at https://www.waterpointdata.org/

This layer identifies if any water was available at the water point on the day of the visit (recognizing that it may be a limited flow) in Haiti. Data was gathered from the Water Point Data Exchange (WPDx) platform, a tool established for sharing water point data throughout the global water sector. The goal of the Water Point Data Exchange is to simplify the way water point data is shared so all stakeholders can work more efficiently.For more information, visit the WPDx website at https://www.waterpointdata.org/