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Spatial data sets in hydrology project
S.Thiruvengadachari Senior GIS Expert, Consultant, Hydrology Project, World Bank charist@hd2.dot.net.in
The on-going World Bank
assisted Hydrology Project (HP) aims at assisting the Central Government and the
participating eight peninsular States in the development of valid,
comprehensive, interactive, easily accessed, and user friendly data bases
The Mid Term review Mission of the World bank has approved the enhancement of the Hydrological Information system with GIS data sets, to provide the spatial dimensions to the point measurements of surface and groundwater quantity, quality and hydrometeorology. The on-going World Bank assisted Hydrology Project (HP) aims at assisting the Central Government and the participating eight peninsular States in the development of valid, comprehensive, interactive, easily accessed, and user friendly data bases covering all important aspects of the hydrological and meteorological cycle; and to provide such data to all legitimate users involved in water resources management. The water resources agencies in the participating States of Andhra Pradesh, Gujarat, Karnataka, Kerala, Madhya Pradesh, Maharashtra, Orissa, and Tamil Nadu are in the process of improving and expanding the observation network, water quality laboratories and computing facilities for collection, compilation, validation and archival of point measurements of hydrometeorological and hydrological parameters. >BR> The GIS technology will enable to relate point measurements to administrative and hydrologic units, generate customized maps, query the database and use the data in modeling applications. Building GIS capability in the Hydrology Project covers:
The proposed GIS strengthening covers preparation of GIS data sets by GW departments in participating states, and provision of stand-alone computer hardware and GIS software and support training in Maharashtra, Orissa and Andhra Pradesh States. A major exercise has now been initiated under HP to generate minimum spatial data sets in the 8 participating States. The overall approach is shown in Fig.1 along with the proposed time schedule. Objective and Scope To generate GIS data sets on select themes for integration in the surface and groundwater Data Centres in 8 participating states, and in the National Data centres. The State Groundwater agency will have responsibility within each state for generating and distributing spatial data sets to the State Surface Water agency, Central Water Commission and Central Ground Water Board. A State Level Technical Committee will be constituted to support the activity. The Technical Committee may have representatives from the State surface and groundwater agencies, the Central Ground Water Board, the Central Water Commission, the Survey of India and the Geological Survey of India. The State GWD will provide a copy of GIS data sets to the surface water agency for integration in the State Surface Water Data Centre. Surface water and groundwater agencies in each state will integrate data in their respective Data Centres. The Central Water Commission and Central Ground Water Board will be responsible for the integration of GIS data sets from all 8 States into the National Surface and Ground water Data Centres.  Fig. 2: Primary Data Layers The generation of GIS data sets will be outsourced to vendors through a competitive bidding procedure, independently by each participating State GWD. To ensure uniformity and consistency in data sets, the standard methodology specified by the Hydrology Project will be followed by the vendors and rigorous quality control will be exercised. The generation of digital spatial data sets covering about 2600 map sheets in 1:50,000 scale over 8 participating states should be completed before the second quarter of 2001, with subsequent integration in the Data Centres during the balance period of HP.
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