Territory Stories

Alligator Rivers region regional surface water quality monitoring : November 1978 - April 1981

Details:

Title

Alligator Rivers region regional surface water quality monitoring : November 1978 - April 1981

Other title

Alligator Rivers Region - Regional Surface Water Quality Monitoring, Volumes 1,2,3 (Plus draft)

Creator

Northern Territory. Department of Transport and Works. Water Division, Environmental Section

Collection

E-Publications; E-Books; PublicationNT; Report ; 49/1983

Date

1983-04-01

Notes

At head of title: Water Division, Dept. of Transport &​ Works, Northern Territory. "April 1983".

Language

English

Subject

Water quality -- Northern Territory -- Alligator Rivers Region; Hydrology -- Northern Territory -- Alligator Rivers Region

Publisher name

Northern Territory Government

Place of publication

Darwin

Series

Report ; 49/1983

Format

3 volumes. ; 30 cm

File type

application/pdf

Use

Attribution International 4.0 (CC BY 4.0)

Copyright owner

Northern Territory Government

License

https://creativecommons.org/licenses/by/4.0

Related links

https://hdl.handle.net/10070/672725 [Alligator Rivers region regional surface water quality monitoring : November 1978 - April 1981 - WRD83049_v_1.pdf]; https://hdl.handle.net/10070/672727 [Alligator Rivers region regional surface water quality monitoring : November 1978 - April 1981 - WRD83049_v_2.pdf]; https://hdl.handle.net/10070/672729 [Alligator Rivers region regional surface water quality monitoring : November 1978 - April 1981 - WRD83049_v_3.pdf]

Parent handle

https://hdl.handle.net/10070/229664

Citation address

https://hdl.handle.net/10070/672725

Related items

https://hdl.handle.net/10070/672729; https://hdl.handle.net/10070/672727

Page content

Technical Report WRD83049 Viewed at 14:07:10 on 29/07/2010 Page 41 of 440. 40. 7. 3 SCREENING OF DATA AS RECEIVED FROM ANDEL 7.3.1 The data received from ANDEL must be screened before analysis, storage and publication. This is necessary to screen errors from the following causes. a) Contamination of samples i) i i) iii) iv) by ANDEL during analysis by field staff during collection, and acidification in transit from container filtration b) Inadvertent loss and mislabelling of Sfu"ple containers c) Incorrect sampling procedures d) Incorrect transcribing of data 7.3.2 As some data appears anomalous, it must be looked at more closely and judgement made on its ~'degree of acceptability~~. The following criteria are used to identify incongruous results. a) b) c) Deviation from statistical parameters shown in SwTh"aries which have been prepared for each sampling site in the network. Deviation from the detection limit for those oarameters normally at or below detection limit. Deviation from regular cycles with gradual changes normally observed for a number of parameters. 7.3.3 The following additional criteria will be used in judgement of data acceptability. a) b) c) d) e) Associated changes in other parameters eg. a high zinc result is often accompanied by increases in other heavy metals, and a large pH drop is usually accompanied by an increase in zinc concentration. Changes in other forms of the sa"e parameters eg. anomalous nitrate results may be checked using total nitrogen results. The results obtained at that site previous to and later than the result being examined. Points upstream and downstrea" of the site are exa~ined at the same time and at different sa~pling dates. Similar trends are looked for in the sa~e oart of the preceding season or the following season. I I I I I I I I I I I I I I I I I I I I


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