The lines that are emitted from the Be disc arise in different regions. The Ha line is emitted more outside, the HeI lines more inside closer to the star's surface.The comparison of the lines profiles and the EW's give a feeling for the dynamical behaviour of the material in the disc. Some material evaporate continuously into space. If there is no injection of new gases from the star the emissions will decrease.
The comparison of the Ha and the HeI lines over the span of a year are shown in the annexes. Both types of lines (Ha and HeI 6678 and HeI 5876) decrease in intensity over the year. There is no sign for the injection of new gaseous material into the disc from inside (del Sco).
What goes on near and after the coming periastron. We will see. Therefore, please observe that star !