|WORLD METEOROLOGICAL ORGANIZATION||
|Explanation of the criteria for classification and numbering of components||
|Explanation of the dates on the component's description|
SOFTWARE FOR ARCHIVING AND RETRIEVING TIME-DEPENDENT DATA (TIDEDA)
1. Purpose and objectives
To store hydrological data, to allow input from digitisers and data
loggers (manually and from other software), to allow editing and
presentation of the data, to allow retrieval in any required form, and to
TIDEDA is computer software for processing TIme DEpendent DAta,
particularly hydrological data. It stores time series of field measurements such as water level, rainfall, temperature, hydraulic gate
A set of rating curves describing a relationship that changes with time may be stored with the data and may be revised as new measurements come to hand.
TIDEDA has its own programming language which enables the user to write software to analyse data as required. For example, a synthetic record may be generated to show how hydro-electric power generation or irrigation will change the flow regime in a river.
TIDEDA is designed for high speed data retrieval and operates on
personal computers in DOS and Windows environments.
Original field records of water level, rainfall, etc; measurements of discharge, sediment concentration, gate settings etc; rating curves relating two or more of these variables; language to control processing, editing, archiving and simulation; on-screen graphics editing.
Data are stored on magnetic disks, or CD-ROM and may be produced in
machine readable form for other programs such as spreadsheets. Displays on
a printer or screen include calendar tabulations of averages or totals for
days, weeks, months, or years; tabulations or plots of value versus
fraction of time exceeded; plots of one time series against another; mass
curves and similar analytical aids for simulation results. Graph plotter
output includes hydrographs with the option of marking calibration
5. Operational requirements and restrictions
TIDEDA is available on a number of computer operating systems. These
include: MS-DOS and Windows, Vax VMS, Solaris, SCO Unix, Data General
6. Form of presentation
Manual in English and compiled programs on diskette or tape. The
software occupies 1.5 to 2 Mb of disk space.
7. Operational experience
TIDEDA has been the basis of the New Zealand national hydrological
data archive since 1972. It has been used by 14 geographically dispersed
hydrological field parties since 1983. It is also used by regional agencies
throughout New Zealand, and in Papua New Guinea, Solomon Islands, Fiji,
8. Originator and technical support
National Institute of Water and Atmospheric Research Ltd, P.O. Box 8602, Christchurch.
10. Conditions on use
The system is copyright and is for sale. Prices are available on request from the HNRC.
|(First entered:13 NOV 84||
Last updated: 16 JUL 99)