Ggplot2不缩放Y轴

I'm having a problem regarding scaling Y axis on the ggplot2. I have a dataset (dane_dlugie) consisted of dates (Data) and river flow observations at three different spots (Osielec, Jordanów and Skawica Dolna). My goal is to plot flows from Osielec regarding the proper date.I'm having a problem regarding scaling Y axis o