This volume describes one of the first steps in the evaluation of alternative policy options for water management — the screening of technical and managerial tactics. In this step, a large number of possibilities for changing the movement and storage of water throughout the Netherlands (tactics) were evaluated in terms of a small number of impact measures in order to screen out those that are clearly not attractive. The output from this step is relatively small list of tactics that are sufficiently sensible and beneficial, relative to their costs, that they deserve a more thorough examination. The volume discusses tactics mainly concerned with alleviating problems caused by shortages of surface water (including low flows and levels in waterways) and water salinity (which refers to the concentration of chloride ions in the water).