This paper aims to study the Conceptual Tools used in Conceptual Modeling
of Database, so that Benefit of Extending these Tool used in Effective Relational
Database Design could be found out.
In this study, we investigated two application examples
, through which two
Conceptual diagrams were used to build Relational Database.
The main result of this study was, the benefit from the extending the
Conceptual Tools for designing a Relational Database could be achieved when
this extension to Tools used in building is applicable to the Database. Since the
Conceptual Modeling stage of the Database, has to be simple and clear, the
extension is not recommended for modeling Conceptual diagrams of large
systems, which has time limits.
There is a need to search for new water resources to supply, with drinkable
water, Damascus City and its rural suburbs. The aim of the paper is to
carry out a hydrological study and to develop a simple model characterizing
AUAGE watershed behavior
. This watershed is one of the two important
basins in the region of Damascus. All water resources, used presently, are
not sufficient to insure the growing needs of drinkable water. Studies that
aim to supply Damascus from the coastal basin indicate that this solution is
very expensive and will not be operational before 2010, which means that
Damascus will suffer from water shortage during the next few years.
