This can result from the physical impossibility to divide the available water resources or because the water temperature (for cooling water) or salinity (for agriculture) is too high. Category 1 takes precedence over all others. It includes freshwater use for safety and the prevention of irreversible damage (e.g. ensuring the stability of flood defence structures, settling and subsidence of peat bogs and moorland, nature dependent on soil conditions). Category 2 includes drinking water supply and power supply. Category 3 includes small-scale, high-quality uses, such as temporary spraying of capital-intensive crops and process water.