Glossary

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Welcome to the - growing - WaterWiki Glossary which builds to a large extent on the WHO Lexicon.

Feel free to browse the glossary, or use the main Search to find definitions or explanations.

Get involved and help us expand this global glossary !

  1. help refine definitions (see featured and most wanted terms below),
  2. add knowledge (key resources, external links, etc.) to existing terms
  3. Add (how?) or suggest missing terms to complement this glossary
  4. If you know of an existing, external glossary, feel free to add it to the list of external resources below

Contents

Most wanted

Newly added terms for collaboration

Contributions are sought for the following: Glossary/Laboratory Network | Glossary/Laboratory | Glossary/Discipline | Glossary/Accreditation | Glossary/Affiliations | Glossary/Function |Glossary/Primary Coordinator | Glossary/Non Laboratory Partners | Glossary/Governance Body | Glossary/Activities | Glossary/Human Resources |Glossary/Capacity | Glossary/Capability | Glossary/Professional Staff | Glossary/Support Staff

20 most recently edited terms

  1. Global warming ‎(3,272 views) . . Jürg Staudenmann . . Categories: Climate change | Glossary | WHO Lexicon
  2. Groundwater table ‎(9,372 views) . . Roland.Oosterbaan . . Categories: Glossary | Groundwater management | Hydrology
  3. HDI ‎(4,162 views) . . Katy.norman . . Categories: Glossary | HDI | UNDP | WHO Lexicon
  4. IWRM ‎(55,307 views) . . Katy.norman . . Categories: Glossary | IWRM | WHO Lexicon
  5. Adaptation activities ‎(3,156 views) . . Katy.norman . . Categories: Adaptation | Glossary | WHO Lexicon
  6. Climate Change ‎(11,549 views) . . Katy.norman . . Categories: Climate change | Glossary
  7. Water pollution ‎(2,438 views) . . Katy.norman . . Categories: Glossary | WHO Lexicon | Water pollution
  8. WSS ‎(8,733 views) . . Katy.norman . . Categories: Central Asia | Glossary | Sanitation | WSS | WatSan
  9. Water quality ‎(3,718 views) . . Katy.norman . . Categories: Glossary | WHO Lexicon
  10. Sanitation ‎(15,959 views) . . Katy.norman . . Categories: Article | Glossary | Sanitation | WHO Lexicon | WSS | WorldMapper
  11. Accountability ‎(1,770 views) . . Katy.norman . . Categories: Accountability | Glossary | WHO Lexicon
  12. Aquaculture ‎(3,045 views) . . Katy.norman . . Categories: Aquaculture | Glossary | WHO Lexicon
  13. Earth Summit ‎(3,346 views) . . Katy.norman . . Categories: Glossary | UN
  14. Glossary/Agricultural water consumption ‎(2,221 views) . . Katy.norman . . Categories: Glossary
  15. PPP ‎(2,189 views) . . Katy.norman . . Categories: Glossary
  16. GDP ‎(2,117 views) . . Katy.norman . . Categories: Glossary
  17. WHO drinking water quality guidelines ‎(899 views) . . Katy.norman . . Categories: Glossary
  18. Water point ‎(1,097 views) . . Katy.norman . . Categories: Glossary
  19. Service provider ‎(1,419 views) . . Katy.norman . . Categories: Glossary
  20. Domestic water ‎(4,396 views) . . Katy.norman . . Categories: Glossary | WHO Lexicon


Terms without a WHO-Definition (yet)

Accessible water and sanitation | Affordable water and sanitation | Agenda 21 | Aquifer types | Asessments | Assembly | Bankability | CSO | Carpathian Convention | Cisterns | Clean water | Climate Change | Concepts / Definitions / Glossary | Convention | Convention on Biological Diversity | Council | DABLAS Initiative | Dinaric Arc | Drainage model | Drainage research | Dry Sanitation Technology | Earth Summit | Environment for Europe | Evaluation | Framework Convention | GDP | Glossary/Agricultural water consumption | Governance | Groundwater table | Hashar | IRBM | Improved water resources | Indicators | International Covenant on Economic, Social and Cultural Rights (ICESCR) | International Waters | Irrigation environmental consequences | Irrigation features | Irrigation in Egypt | Irrigation of alluvial fans | Irrigation water management | Laboratory Network | Land drainage | Glossary | MSGP | National Policy Dialogue | PPP | Persistent Organic Pollutants | Persistent Pesticides | Petersberg Process | Primary data | Public involvement | Reporting | River Basin Organizations | River basin councils | Rural Water Supply and Sanitation (RWSS) | Salinity control | Secondary data | Sector-wide Approach (SWAP) | Service provider | Soil hydrology | Soil salinity | Sufficient water | Tariffs | Tertiary data | Tidal irrigation (Abadan) | UN Agency | UN Framework Convention on Climate Change (UNFCCC) | WHO drinking water quality guidelines | WSS | Water Footprint | Water Governance | Water as environmental good | Water as social good | Water point | Watershed | Watertable control | Workspace - UNDP Partnership with Coca-Cola |

Featured

This month's featured terms, suggested for collaborative refining

Terms and definitions outside WaterWiki

From Wikipedia;

International Waters

Water

Water cycle

Aquifer

Browse the Glossary

Latest 15 WHO-terms
  1. Global warming ‎(3,272 views) . . Jürg Staudenmann . . Categories: Climate change | Glossary | WHO Lexicon
  2. Groundwater table ‎(9,372 views) . . Roland.Oosterbaan . . Categories: Glossary | Groundwater management | Hydrology
  3. HDI ‎(4,162 views) . . Katy.norman . . Categories: Glossary | HDI | UNDP | WHO Lexicon
  4. IWRM ‎(55,307 views) . . Katy.norman . . Categories: Glossary | IWRM | WHO Lexicon
  5. Adaptation activities ‎(3,156 views) . . Katy.norman . . Categories: Adaptation | Glossary | WHO Lexicon
  6. Climate Change ‎(11,549 views) . . Katy.norman . . Categories: Climate change | Glossary
  7. Water pollution ‎(2,438 views) . . Katy.norman . . Categories: Glossary | WHO Lexicon | Water pollution
  8. WSS ‎(8,733 views) . . Katy.norman . . Categories: Central Asia | Glossary | Sanitation | WSS | WatSan
  9. Water quality ‎(3,718 views) . . Katy.norman . . Categories: Glossary | WHO Lexicon
  10. Sanitation ‎(15,959 views) . . Katy.norman . . Categories: Article | Glossary | Sanitation | WHO Lexicon | WSS | WorldMapper
  11. Accountability ‎(1,770 views) . . Katy.norman . . Categories: Accountability | Glossary | WHO Lexicon
  12. Aquaculture ‎(3,045 views) . . Katy.norman . . Categories: Aquaculture | Glossary | WHO Lexicon
  13. Earth Summit ‎(3,346 views) . . Katy.norman . . Categories: Glossary | UN
  14. Glossary/Agricultural water consumption ‎(2,221 views) . . Katy.norman . . Categories: Glossary
  15. PPP ‎(2,189 views) . . Katy.norman . . Categories: Glossary
All terms

Absolute humidity | Acceptable daily intake (ADI) | Accessible water and sanitation | Accountability | Accreditation | Acid Rain | Acid rain | Acid water | Acidification | Actinomycetes | Activated sludge | Activated sludge process | Activities | Adaptation activities | Adsorption | Advocacy | Aerobic lagoon | Aesthetic objective | Affiliations | Affordable water and sanitation | Agenda 21 | Agricultural environment | Air gap | Algae | Alkali | Alkaline water | Alkalinity | Ambient temperature | Anaerobic lagoon | Anaerobic pond | Analytical achievability | Anthropogenic | Aqua-privy | Aquaculture | Aquifer | Aquifer types | Aridification | Around the end mixing | Artesian water | Asessments | Assembly | Associated project | Atmosphere | Attached growth system | Back flow | Back pressure | Back siphonage | Back water valve | Background concentration | Background level | Bankability | Baseline | Bathing waters | Belt skimmer | Best available technology | Bicarbonate | Bioaccumulate | Biochemical oxygen demand | Biodegradable | Biodiversity | Biofilm | Biofilters | Biological nutrient removal | Biotechnology | Black water | Blackwater | Blind baffle | Block A Grant | Block B Grant | Block C Grant | Blow-down | Blue green water | Body of water | Bogs | Boil water advisory-order | Boiling | Borehole latrine | Bottled water | Brackish water | Bretton Woods Institutions | Buffer zone | Building drain | Building subdrain | CSO | Capability | Capacity | Capacity Building | Carbon dioxide | Carpathian Convention | Carrying Capacity | Catalyzing | Catchment | Cation exchange | CentraliSed system | Centrifuge | Chamber soakaway | Chemical oxygen demand | Chemical toilet | Chemical water contamination | Chemical water softening | Chief Executive Officer(CEO) | Chlorinated water | Chlorination | Chlorine | Cholera | Cistern | Cisterns | Civil Society | Clarifier | Clean water | Climate Change | Closed water circuit | Closed water networks | Co-Funding or Co-Financing | Coagulated water | Coagulation | Coastal water | Coastal water pollution | Coliform bacteria | Coliforms | Collecting system | Collecting channels | Combined building drain | Combined sewer | Commercial water consumption | Commons | Community water source | Community water tap | Complementarity | Complementary Activities | Concept Paper | Concepts / Definitions / Glossary | Concrete-lined earthen reservoir | Condominium sewerage | Conference of the Parties (CoP) | Confined water | Conflict about water | Constructed wetlands | Consumption of water | Contaminant | Contaminated water | Continental water | Control measure | Control point | Convention | Convention on Biological Diversity | Conventional treatment | Cooling water | Copepods | Corrective action | Corrosive water | Cost Recovery | Cost Sharing | Cost-Effective | Council | Country Driven | Crop coefficient | Cross connection | Cross contamination | Cryptosporidiosis | Cryptosporidium | DABLAS Initiative | Dead water | Deep-layer injection | Deforestation | Deionized water | Dengue | Depuration | Diarrhoea | Dinaric Arc | Direct filtration | Direct recharge | Disc skimmer | Discharge pipe | Discipline | Disinfected water | Disinfection | Disinfection by-products | Disposal | Dissolved air flotation | Dissolved oxygen | Distilled water | Distribution channels | Domestic benefits | Domestic connection | Domestic use | Domestic water | Domestic water consumption | Domestic water meter | Domestically acquired | Double-vault compost latrine | Down pipe | Downstream ecosystem | Downwelling | Drain | Drain cock | Drainage field | Drainage model | Drainage research | Drainage system | Drainage trench | Drift | Drilled well | Drip irrigation | Dry Sanitation Technology | Drying bed | Dual system | Dual system (hot water plumbing) | Dual water supply network | Dug well | Earth Summit | Ebb tide | Ecological Impact | Economic instruments | Ecosphere | Ecosystem | Ecosystem approach | Effluent | Eichornia crassipes | El Niño | Elevated steel reservoir | Eligibility Country | Enabling activities | Endangered species | Environment | Environment advisor | Environment for Europe | Environmental monitoring | Environmental quality standard | Environmental requirements | Environmentally sensitive zones | Escherichia coli | Eutrophication | Evaluation | Evaporation | Evaporative condenser | Evapotranspiration | Executing Agency | Executive Coordinator | Facultative lagoon | Facultative pond | Faecal indicator organism | Fens | Ferrocement water tank | Field capacity | Filter backwash | Filter drain | Filter press | Filter strips | Filtered water | Final water | Finished water | Float valve | Flocculated water | Flocculation | Flood | Flushing | Flushometer valve | Focal Area | Focal Point, Operational | Focal point, National | Fossil fuels | Framework Convention | Free-standing project | Fresh water | Freshwater | Frontier waters | Full Project Grants | Function | GDP | GEF-Assembly | GEF-Council | GEF-SGP | GEF-Secretariat | GEFDOC(GEF Document) | GEFOP -- GEF Operations Committee | GEMS-EAU | GLWQA | Garburator | Genetic engineering | Global Benefits | Global Commons | Global Environment | Global Water Quality Monitoring Programme | Global environmental benefits | Global warming | Agricultural water consumption | Governance | Governance Body | Graywater | Grease interceptor | Green water | Greenhouse effect | Greenhouse gases | Greywater | Grit removal | Groundwater | Groundwater catchment | Groundwater contamination | Groundwater exploitation | Groundwater exploration | Groundwater flow | Groundwater flow system | Groundwater recharge | Groundwater runoff | Groundwater table | Groundwater under the influence of surface water | Groundwater use | Group of 77 | Group of Eight (G-8) | Guideline value | Gulf stream | Gutter | HDI | Habitat | Halocline | Hard water (see hardness, total) | Hardness, total | Hashar | Hazard analysis | Hazard analysis and critical control point (HACCP) | Hazardous Substance | Hazardous Waste | Hazardous waste | Health-based target | Heat engine | Heavy metals | Heavy water | Helminth | Heterotroph | Heterotrophic plate count | Host | Hot tub | Household water management | Household water storage | Household water supplies (see Household water storage) | Household water treatment | Human Development | Human Resources | Human-vector contact | Hydraulic conductivity | Hydraulic gradient | Hydraulic retention time | Hydrological cycle | Hydrolysis | Hydropower | Hygienic water use | IBAs | IRBM | IWRM | Imbibition | Impeller mixing | Impermeable | Impervious layer | Implementation Plan | Implementing Agencies | Impoundment | Improved water resources | Incremental cost | Incrustant water | Indicator organism | Indicators | Indirect recharge | Industrial waste | Industrial wastewater | Industrial water | Industrial water consumption | Infiltration rate | Infiltration trench | Institutional building | Instrument of the Restructured GEF | Intake | Integrated Pest Management(IPM) | Integrated management of water resources | Integrated waste management | Interior waters | Intermediate water | International Covenant on Economic, Social and Cultural Rights (ICESCR) | International Drinking Water Supply and Sanitation Decade | International Waters | International financial institutions | Investment projects | Irrigation | Irrigation environmental consequences | Irrigation features | Irrigation in Egypt | Irrigation of alluvial fans | Irrigation water | Irrigation water management | Joint implementation(JI) | Kyoto Protocol | Laboratory | Laboratory Network | Lack of drinking water services | Lagoon | Lake water collection | Land degradation | Land drainage | Land reclamation | Land rehabilitation | Landless | Larva | Latrine | Glossary | Leach pit | Leachate | Leaching | Legionellosis | Leopold plastic block | Leptospirosis | Leveraging | Lime | Localized irrigation | Log-reduction | Logical Framework Approach (Log Frame) | Low-rate biological treatment systems | MDGs | MSGP | Mains water | Mainstreaming | Maintenance | Manifold | Maximum acceptable concentration (MAC) | Mechanical dispersion | Medium | Medium-Size Grants (MSG) | Migratory birds | Mitigation measures (short- and long-term) | Monitoring | Monitoring and Evaluation(M&E) | Montreal Protocol | Multi-barrier approach | Multilateral | Multiple barriers | National Appropriation | National Policy Dialogue | Natural spa | Nephelometric Turbidity Unit | Night storage water reservoir | Nightsoil | Non Laboratory Partners | Non-Point Source | Non-governmental Organization (NGO) | Non-piped water system | Non-point source pollution | Non-potable water | Nutrients | Occurrence | Off-site sanitation | Offset pit | Oil trap | On-site sanitation | Operational Principles | Operational Programs(OP) | Operational Strategy (OS) | Operational monitoring | Over and under mixing | Overhung latrine | Overland flow | Owner-Operator | Oxidation ditch | Ozone | Ozone Layer | Ozone depletion | PCB | PDF Grants | PH | PPP | Packaged drinking water | Pan | Part per billion | Part per million | Participants | Perforated baffle | Performance targets | Permeable | Persistent Organic Pollutants | Persistent Pesticides | Petersberg Process | Photosynthesis | Pilot Phase | Pit latrine | Plumbing | Plumbing fixture | Point source pollution | Point-of-entry treatment device | Polluter Pays Principle(PPP) | Pollution | Porosity | Port | Portfolio | Potable Water | Potable water | Pour-flush latrine | Precautionary principle | Precipitation | Pressure reduction valve | Primary Coordinator | Primary data | Primary sludge |

External resources

Glossaries and lexica in the UN-world

WHO - The Lexicon - Used in large parts as basis to populate and keep updated this very WaterWiki Glossary

Joint Monitoring Programme - Definitions around Access to water and sanitation

FAO’s Online Land and Water Glossary of Terms...


Non-UN glossaries and lexica

EPAEDIA - by the European Environment Agency

The European Union’s Water Framework Directive Glossary of Terms

IWMI (International Water Management Institute): glossary of terms

National Water Commission (Australia): Water Dictionary

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