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“IWRM-Fergana” project database
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In “Integrated water resources management in Fergana Valley” Project, the database is regarded as an element, ensuring cross information coordination of activities under three components - “Large irrigation systems management”, “WUAs”, "Private farm” - with “Mathematical models” and “GIS”. The main purpose of the database is to store and manage on a centralized basis a collection of interrelated data, adequately representing the status of the studied objects in the given domain and relations between them, and also service (in the context of providing relevant information) various users, objects and processes of management. Central concepts of the database are “Information point” and “information object”.
Adequate coding system is applied for individual and unique determination of diverse studied objects in all set of studied domain objects. Coding, used in database being developed, meets univocacy requirements, i.e. each object is given one code, and one object corresponds to each code, and also envisages possibility of expansion and inclusion, i.e. a set of coded objects can increase. Object coding relies on the theory of networks, where each structural relation p forms due to a pair of information points p (j, k), where k is a key of this object, and j is a key of an object, from which flow is received. Such approach let reflect hierarchical structure of information objects correctly, and fulfill p – navigation between them - in algorithmic way. In particular, if p corresponds to water resources, then network of water resources allocation between information objects is built. Serial and compound coding techniques are used as the main coding procedures. All information in the database is stored in the form of relevant information structures (tables), characterizing various studied (water) objects, their types (canals, WUAs, private farms, experimental field, etc.), and also various relations between each other. Object (family of objects), as a rule, is presented in the form of one or several interrelated tables, each of which contains certain set of object properties (characteristics). |
