A new improved model for some key hydrological soil attributes has been developed. This new model means that S-map estimates of Profile Available Water (PAW) for all soils will change. Some technical information on the model can be found here.

The magnitude of the change is summarised in Figure 1. PAW to 60cm depth will increase for most soil orders, but decrease for most Allophanic and Granular soils. Figure 2 shows the change in estimated PAW to 60 cm spatially.

Figure 1. Indicates the change in PAW to 60 cm by soil order

Figure 2 Maps of the change in PAW (to 60 cm)