Amcanion Ansawdd Afon Hynafol
Roedd y dosbarthiad Amcanion Ansawdd Afon (RQO) yn cael ei ddefnyddio i gynllunio gwelliannau mewn ansawdd dŵr tan 2006 pan orffennodd y cynllun. Roedd RQOau yn cael eu rhoi i afonydd mawr (yn ddibynnol ar lif yr afon). Roedd samplau cemegol yn cael eu cymryd 12 gwaith y flwyddyn. Byddai unrhyw fethiannau yn ansawdd yr afon, eu rhesymau a'r gweithrediadau i'w rhoi ar waith, yn cael eu storio mewn tablau gwahanol. Daeth y cynllun dosbarthu RQO i ben yn niwedd 2006, ac mae bellach yn dabl sefydlog na ellir ei ddiweddaru.
Cydnabyddiaeth
Yn cynnwys gwybodaeth Cyfoeth Naturiol Cymru © Cyfoeth Naturiol Cymru a Hawl Cronfa Ddata. Cedwir pob hawl.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS116327
- Teitl Amgen
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- AfA164 Historic River Quality Objectives
- Laith Metadata
- English
- Datganiad
-
RQOs were assigned to all significantly sized rivers (based on river flow). RQOs were based on the River Ecosystem (RE) Classification Scheme which was introduced in 1994 to replace the National Water Council's methodology. The RE system consists of five classes (1-5) based on the same determinands used in the General Quality Assessment (GQA) chemistry assessment of Biochemical Oxygen Demand (BOD), ammonia and dissolved oxygen but also includes the additional determinands of (free (or un-ionised) ammonia, pH, hardness, dissolved copper and total zinc) that reflect the requirements of a river ecosystem. Chemical samples were taken 12 times a year. Any river quality failures, their reasons and actions to be taken, were stored in separate tables.
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2016-12-20
Ystod amser
- Dyddiad cychwyn
- 1997-01-01
- Dyddiad gorffen
- 2006-12-31
- Categori pwnc
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- Inland waters
Rhychwant
Rhychwant
- Hyd
- Wales (WLS)
))
Dosbarthiad
Dosbarthiad
- Fformat - Math a Disgrifiad
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-
Documents
(
)
- Math
-
MS Excel
-
Documents
(
)
- Lleolwr Adnoddau
- View and Download ( WWW:LINK-1.0-http--link )
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Cydymffurfiad
- Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
- Eglurhad
-
This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
- Gradd
- false
- Datganiad
-
RQOs were assigned to all significantly sized rivers (based on river flow). RQOs were based on the River Ecosystem (RE) Classification Scheme which was introduced in 1994 to replace the National Water Council's methodology. The RE system consists of five classes (1-5) based on the same determinands used in the General Quality Assessment (GQA) chemistry assessment of Biochemical Oxygen Demand (BOD), ammonia and dissolved oxygen but also includes the additional determinands of (free (or un-ionised) ammonia, pH, hardness, dissolved copper and total zinc) that reflect the requirements of a river ecosystem. Chemical samples were taken 12 times a year. Any river quality failures, their reasons and actions to be taken, were stored in separate tables.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
-
NRW Thesaurus
-
- river quality
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2025-01-08
Allweddair
-
IPSV Subjects List
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- Water quality
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2020-11-18
Allweddair
-
NRW SMNR Keywords
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- Hydrological Processes (SMNR)
- Water Quality (SMNR)
- Freshwater and Wetlands (SMNR)
- Management Areas (SMNR)
- Sustainable Management of Natural Resources (SMNR)
- Water Resources (SMNR)
- Ecosystem (SMNR)
- Physical Geography (Physiography) (SMNR)
- Natural Resources (Incl. Features and Processes) (SMNR)
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2024-06-26
System Cyfeirio Gofodol
- Cod
- NONE
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
Cyfyngiadau
Cyfyngiadau
Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus
- Math o Gyfyngiad
- Other restrictions
Cyfarwyddeb Cyfyngiadau Mynediad
- Cyfyngiadau
- no limitations
Testun cyfyngiadau mynediad
- Cyfyngiadau eraill
-
There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Defnyddiwch gyfyngiadau
- Cyfyngiadau Defnyddio
- Other restrictions
- Cyfyngiadau eraill
-
© CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
Datganiad Priodoli
- Cyfyngiadau eraill
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Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
Metadata
Metadata
- Dynodydd Ffeil
- 4f4c4942-4343-5764-6473-313136333237 XML
- Laith Metadata
- English
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2025-03-05T14:55:24.134Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
-
1.0