Wykorzystanie danych przestrzennych w kształtowaniu zasobów wodnych

The objective of this paper is to show the role of spatial terrain data in planning solutions of problems in the area of water resources management as well as the identification of main methodical and technical problems accompanying the planning process. Basing in the first place on the rules used in water resources management in connection with regional policy of socio-economic development, we have defined:. Spatial scales - levels of analysis of subjects in defining problems within the framework of water management (regional, basin and local) and their reference to terrain data bases - Subjects selected for further analysis in order to formulate some particular problems on junction of water resources management and application of terrain data bases for planning water management undertakings. Subjects which are the aim of analysis concentrate on problems dealing with flood protection, where looking for effective solutions is strongly connected with spatial terrain data base, differentiated both thematically and with respect to accuracy level. The following two subjects have been selected: Formation of river space for safe flood water outflow in conformity with environmental requirements. Retention of rainfall in a catchment in order to reduce flood discharge into the river. The element connecting both the above mentioned subjects at the stage of formulation of technical solutions, is determination of flood hazard level and assessment of possibility of its limitation. This analysis is based on the data base collecting terrain data and information about its development. Problems arise from spatial interpretation of the range of flood hazard. It results from the fact that the initial information is not complete and that combination of the two subjects is in different dimensions. Relation: type of data - accuracy of data . analysis of results and their interpretation was performed on example of flood hazard assessment. We identified main methodical and technical problems. We also referred to the role of some additional information coming both from another source and concerning another form of geodesic data presentation as, for example, the use of ortophotomaps in particular analyses and assessments.