The research of the Commission Water Management 21st century (WB21) has among other things resulted in a water task. The water tasks must be considered as the hydrological wish of the Water boards. It gives information about what is necessary and sufficient for retention, inundation or discharge the excess of water. Sufficient means in this case what is necessary for a good water management in future circumstances (that of the year 2050), without transferring the problems of the access water of a certain area onto other water systems.
The water tasks have been laid down in the National Governing Board Agreement Water. To satisfy the future water task, in most cases water management must be adjusted. To decide whether the extent of the interventions in the water management is sufficient for there contribution to the water task, quantification of the impact of water management interventions on the water system is necessary. Quantifying the impact of such interventions demands a model treatment. Generally this treatment is only on regional scale feasible.
The objective of the research consists of generating nationwide quantitative maps of hydrological properties such as seepage and discharge, as well as maps of the impact of water management interventions on the basis of model calculations. Alterra-report 1339; Gaast, J.W.J. van der, H.Th.L. Massop, H.R.J. Vroon & I.G. Staritsky; Hydrologie op basis van karteerbare kenmerken, Wageningen, Alterra.
The presented treatment results in a national set of calibrated models and a set of transfer functions based on the calibrated models for a number of hydrological characteristics. A number of important products of the project are maps of seepage, normative discharge and water storage. Moreover the project results in knowledge in the form of transfer functions and knowledge tables which can be used in other projects. |
