HYDATA

Hydrological Database and Analysis System
Η έκδοση του HYDATA για Windows είναι υπό κατασκευή!


HYDATA is a hydrological data processing and analysis system used in more than 40 countries. HYDATA has been designed for ease of use with no requirement for users to understand the structure of data files, the computer operating system or running of individual programs. The software is menu-driven and users are aided by information and error messages.

KEY FEATURES


DATA TYPES

HYDATA has been designed to handle the types of data most often encountered in hydrological studies. Both daily and monthly data can be stored. Daily flow and storage data may be calculated automatically using stored rating equations.
Station Location: Latitude/Easting - Longitude/Northing - Altitude. Station Details: Name and number - River basin area and number. Event Data: River level - Rainfall - Lockage - Lake/reservoir level - Up to 100 readings per day. River Gauging Data: Date - Stage - Velocity - Area - Discharge. Rating Equations: Stage/discharge or level/storage - 3 parameter logarithmic - Up to 3 parts, 20 ratings/station - Up to 6 parts, 11 ratings/station. Discharge. Rainfall. Lake or Reservoir Storage. General Time Series Data: Any user-defined daily data or monthly data (e.g., evaporation, temperature, electrical conductivity).

DATABASE OPERATIONS

Data may be entered and edited from the keyboard using HYDATA's screen editing facilities, read directly from computer data files, or transferred from external sources such as loggers, digitizers, and mainframes.

RATING EQUATIONS

In hydrologic studies, it is often necessary to develop rating equations giving the relationship between river level and discharge or between the water level of a lake (or reservoir) and its storage. HYDATA allows rating equations to be derived quickly and accurately from measured data. The rating equations used by HYDATA are logarithmic in form. They can have up to three segments, each station having up to 20 rating equations (or alternatively six segments, each station having up to 22 rating equations). The raw data required to develop a rating are entered using HYDATA's gauging editor. Rating equations can be entered directly, if available, or can be derived using the interactive graphics facility provided. A "best fit" rating equation can be calculated if required.

COMPARISON PLOTS

Double Mass Plot



Time Series Plot



Flow Duration



Low Flow Analyses

Baseflow Index



Logarithmic Plot



Hydrograph Recession Plot



Low Flow Frequency Analyses



DATA OUTPUT

Stored data can be displayed using HYDATA's graphics and printing facilities. Graphs can be viewed on screen or printed and can be customized for inclusion in reports. The tabulated data are suitable for use in hydrological yearbooks. Data can be output to a file for use with other PC packages.

GRAPHICS

Graphs can be viewed on-screen or on paper, and customized for inclusion in reports. Data can also be output directly to computer files for use with other software programs.

HYDATA UTILITIES

HYDATA has a number of utility programs available separately.

Requirements

IBM-PC or compatible with 640K RAM, and 10 MB hard disk. Most printers and HP 7475A plotter are supported.

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