MED-HYCOS Montpellier RTF2 - RTF4 Meetings, July 1997



1. General considerations

National fund of hydrological data is the result of over forty years of systematic activity of:

The main target is to achieve a management and storing system of those data, which allow the fast access to an efficient use with high performant computing equipment.

To reach this objective we need:

The evolution of computer systems and the changes in researchers view about database, required a review of the general conception of storing and managing the hydrological databases systems.

The hydrological database management system is NATIONAL.

The information comes from:

The amount of information stored in the database is systematic added, without out-of-date data, the new data being added to the old one making long series of historical data.

The system is OPEN, receiving information from other systems:

and providing information to other systems: Inputs from other systems:

From meteo system:

From cadastre of water: From cadastre of water: Outputs to other systems:

To the system of environment protection:

To the exploiting system of water resources: To the system of cadastre of water: The main objective of hydrological database management system is to supply with maximum efficiency of correct information essential to the following activities: 2. Informational flow

It is determined by the utilisation requirements and restrictions of information and it has 2 components:

3. The Present Stage

The system of hydrological database management is developing information the Data Processing Centre from National Institute of meteorology using 286 to 586 computers and a computer network based on Novell Netware 4.11.

The amount of data stored until now are:
Data Type 1952-1992 1993-1995 Validated
1. Daily discharges 770 940 770
2. Floods 300 800 900
3. Solid discharges 280 450  80
4. Measurement of discharge 550 900 160

The design of database draft had in view the following elements:

The structure of hydrologic informational system and the informational flow require 2 components of the database: In the Data Processing Centre computer programmes were created to manage every type of data. These programmes make only validation and correction of the database. Until now applications have not been created to exploit these data.

In the last few months we have worked for an application that will exploit the hydrological database. Last week we finished the main module of this application, and now it is in experimental stage.

This application was written in FoxPro and it was designed to work in a network. Of course it could work as well on a workstation. It manages the following types of data:

The main features are: The main purpose was to protect the data and to create a way to control of users.

The data security is ensured by:

This programme is not finished yet, it was written to ensure interfaces to other programmes.

We are going to link in the same application or to another one the meteo database.