https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf
23.7
2026-04-15T10:53:30.610Z
https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad
WATER QUALITY/WATER CHEMISTRY
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - CHLOROPHYLL [de21632f-b614-4375-8f09-d14ab00d852b,84779]
Date=2018-03-06 User Id=tstevens Entity=NarrowerRelation Operation=INSERT
User Note=Insert Concept
System Note=add narrower relation
New Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - Contaminants [09d2cb95-9433-45c0-b951-d7cab2284cb2,310623]
Date=2018-03-06 User Id=tstevens Entity=NarrowerRelation Operation=INSERT
User Note=Insert Concept
System Note=add narrower relation
New Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - WATER CHARACTERISTICS [f7e97dc3-1181-41b5-8b90-946eb2504110,310633]
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - SUSPENDED SOLIDS [9d8cb1dd-4b38-4b4e-8532-ab4eb72cd4ae,86789]
Date=2018-03-06 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - OXYGEN [b632d0cc-d4b0-458e-a182-16bbd2a5ab05,86205]
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - WATER TRACE ELEMENTS [475c95a4-fd1c-4015-825f-07f6529858b0,86485]
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - DISSOLVED SOLIDS [7d82a1f7-aa6e-47c7-8eb3-78bfe2e4349b,86683]
Date=2018-03-06 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - INORGANIC MATTER [e848dbd1-b70a-4820-a630-98bd642ae357,86787]
Date=2018-03-06 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - ACID DEPOSITION [62ee81e7-9f5a-4af5-a086-f4c402c7d19d,86731]
Date=2018-03-06 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - CARBON DIOXIDE [a9b89557-c09f-4a4a-a1eb-47c632f8eb59,83563]
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - WATER ION CONCENTRATION [4cc8def9-a825-4ede-9e34-4e11cf89488d,86501]
Date=2018-03-06 User Id=tstevens Entity=Definition Operation=UPDATE Field=reference
System Note=update Definition
Old Value=Water Resources Glossaries of the USGS. "http://water.usgs.gov/glossaries.html"
New Value=Water Resources Glossaries of the USGS
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - PHOSPHOROUS COMPOUNDS [846d2db9-41cd-4ae8-b4ff-a34a9efb7428,85769]
Date=2018-03-06 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - HYDROCARBONS [aef23021-81c1-4540-a0a5-35c590142a6d,86415]
Date=2018-03-06 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Remove Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - Contaminants [09d2cb95-9433-45c0-b951-d7cab2284cb2,310623]
Date=2018-03-06 User Id=tstevens Entity=NarrowerRelation Operation=INSERT
User Note=Insert Concept
System Note=add narrower relation
New Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - METALS/MINERALS [961591ce-9207-47db-9aeb-11586371fa12,310629]
Date=2018-03-06 User Id=tstevens Entity=NarrowerRelation Operation=INSERT
User Note=Insert Concept
System Note=add narrower relation
New Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - GASES [7b98fcc5-4465-45c8-a647-557432276844,310625]
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - LIGHT TRANSMISSION [45351e81-fcd4-46a1-9222-315946caefc7,86757]
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - NITROGEN COMPOUNDS [644e0f53-98a2-4512-a228-00f5e61fd93d,85843]
Date=2018-03-06 User Id=tstevens Entity=NarrowerRelation Operation=INSERT
User Note=Insert Concept
System Note=add narrower relation
New Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - ISOTOPES [4d5f7ae1-3368-468b-825b-e72c1df24508,310627]
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - ALKALINITY [a74059fe-6b15-4b55-8ea5-4a65b66c7e11,86125]
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - METALS/MINERALS [961591ce-9207-47db-9aeb-11586371fa12,310629]
Date=2018-03-06 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - DISSOLVED GASES [ac933400-3c8c-4db4-ac68-5e8ed06c8336,86729]
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - STABLE ISOTOPES [fb52b51d-8bb4-4b04-907b-c130ec706f85,83825]
Date=2018-03-06 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - CARCINOGENS [31c913e1-9692-45b5-bce5-cca46fa1874d,86463]
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - CONDUCTIVITY [d14389d9-54f5-41a0-b8e8-dc9d8f87e4e2,84349]
Date=2018-03-06 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - ORGANIC MATTER [9c90825c-a35f-4165-8248-e90ab869f8ec,85083]
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - PH [14625f2a-4186-4377-a0d9-88998bb6b775,85923]
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - TURBIDITY [0eaf009f-f92b-48b5-8a71-9c44c80d03d4,85745]
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - TRACE METALS [f2d6aa01-5070-4147-bae1-4b2cad2c3987,86265]
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - RADIOISOTOPES [6f4e850f-84e4-466f-b5ad-2032ea2187ea,86245]
Date=2018-03-06 User Id=tstevens Entity=NarrowerRelation Operation=INSERT
User Note=Insert Concept
System Note=add narrower relation
New Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - SOLIDS [fad79bec-0672-4c71-8910-174c8985a1b9,310631]
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - BENTHIC INDEX [4497eb1b-b64d-46ff-a18d-37d217430777,86785]
Date=2018-03-06 User Id=tstevens Entity=NarrowerRelation Operation=INSERT
User Note=Insert Concept
System Note=add narrower relation
New Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - WATER QUALITY INDEXES [f2130ca3-3587-4312-b6d4-138456b5ea78,310635]
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - WATER TEMPERATURE [61594015-4ab4-4b38-ae4f-e31a4757b065,83851]
Date=2018-03-06 User Id=tstevens Entity=Definition Operation=UPDATE Field=text
System Note=update Definition
Old Value=Water quality refers to the physical, chemical, and biological characteristics
of water with respect to its suitability for a particular use. Water chemistry
refers to the chemical characteristics of water.
New Value=Water quality refers to the physical, chemical, and biological characteristics of water with respect to its suitability for a particular use. Water chemistry refers to the chemical characteristics of water.
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - TOXIC CHEMICALS [bf3aaf41-3502-49cf-89df-4613ce87c9c3,85115]
Date=2018-03-07 User Id=tstevens Entity=NarrowerRelation Operation=DELETE
User Note=Move Concepts
System Note=delete narrower relation
Old Value=WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad,83565] - WATER POTABILITY [dac96944-5a5e-4b2a-802d-74627bb93db9,84803]
Date=2026-02-18 User Id=system System Note=Added narrower relation from WATER QUALITY/WATER CHEMISTRY [8c02f5d1-ce86-4bf5-84d5-b3496cdba6ad] to HARMFUL ALGAL BLOOM (HABs) [ab804ba3-7551-4ca2-83a0-6af042c870e9]
Water quality refers to the physical, chemical, and biological characteristics of water with respect to its suitability for a particular use. Water chemistry refers to the chemical characteristics of water.
2018-03-07 08:52:24.0