Fig. 4. Variations in mean daily bromide concentrations at 50 cm simulated for 2 yr following a hypothetical application of 208 mg m^–2 on 28 April of each year starting in 1995. The dark gray envelope and the black line shows the minimum, maximum, and mean concentrations simulated for ten 2-yr periods following springtime applications from 1995 to 2004. The white lines show daily variations in concentrations during the wettest period (1996–97) and the driest period (2001–02). Astronomical seasons are used: Sp, Spring (Apr.-June); Su, Summer (July-Sept.); F, Fall (Oct.-Dec.); and W, Winter (Jan.-Mar.).