THE HUAIHE BASIN WATER RESOURCE AND WATER QUALITY MANAGEMENT PLATFORM IMPLEMENTED WITH A SPATIO-TEMPORAL DATA MODEL
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Presently, planning and assessment in maintenance, renewal and decision-making for watershed hydrology, water resource
management and water quality assessment are evolving toward complex, spatially explicit regional environmental assessments.
These problems have to be addressed with object-oriented spatio-temporal data models that can restore, manage, query and visualize
various historic and updated basic information concerning with watershed hydrology, water resource management and water quality
as well as compute and evaluate the watershed environmental conditions so as to provide online forecasting to police-makers and
relevant authorities for supporting decision-making. The extensive data requirements and the difficult task of building input
parameter files, however, has long been an obstacle to use of such complex models timely and effectively by resource managers.
Success depends on an integrated approach that brings together scientific, education and training advances made across many
individual disciplines and modified to fit the needs of the individuals and groups who must write, implement, evaluate, and adjust
their watershed management plans. The centre for Hydro-science Research, Nanjing University, in cooperation with the relevant
watershed management authorities, has developed a WebGIS management platform to facilitate this complex process. Improve the
management of watersheds over the Huaihe basin through the development, promotion and use of a web-based, user-friendly, geospatial
watershed management data and decision support system (WMDDSS) involved many difficulties for the development of this
complicated System. In terms of the spatial and temporal characteristics of historic and currently available information on
meteorological, hydrological, geographical, environmental and other relevant disciplines, we designed an object-oriented spatiotemporal
data model that combines spatial, attribute and temporal information to implement the management system. Using this
system, we can update, query and analyze environmental information as well as manage historical data, and a visualization tool was
provided to help the user interpret results so as to provide scientific support for decision-making. The utility of the system has been
demonstrated its values by being used in watershed management and environmental assessments.