Territory Stories

Electronic Data Collection and Analysis System

Details:

Title

Electronic Data Collection and Analysis System

Creator

Yin Foo, Des; Foley, Margaret

Collection

E-Publications; PublicationNT; E-Books; Report ; 39/1992

Date

1992-08-01

Description

Made available via the Publications (Legal Deposit) Act 2004 (NT).

Notes

Date:1992-08

Language

English

Publisher name

Power and Water Authority

Place of publication

Darwin

Series

Report ; 39/1992

File type

application/pdf.

Copyright owner

Check within Publication or with content Publisher.

Parent handle

https://hdl.handle.net/10070/229024

Citation address

https://hdl.handle.net/10070/673447

Page content

Technical Report WRD92039 Viewed at 15:07:17 on 29/07/2010 Page 169 of 192. Dl. CO}TVERTING LOGGED HEAD TO DRAWDOWN ~later level data which was logged in terms of "head" (Le. the depth of water above the transducer) may need to be converted to d:awdown (i.e. change in water level compared to that at some pe;rticular time). If the head at the time TO is HO I then the drawdown at any time compared to HO is : DD = HO - H (1 ) i.e. the drawdown at any time is found by subtracting the head at that time fr-om the head at time TO. A fall in water level is therefore calculated as a positive drawdown. "DATMAN" provides a facility to subtract a constant from a complete data set I which can be used if (1) above is revlritten as : DD - -(H - HO) = (H-HO) * -1 l'herefore the procedure to perform the conversion is to subtract HO from the entire data set, and to then multiply the set by -1. See example 4. 2 belO\~.


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