What are these blue lines around the runway at the airport chart that I marked with red lines? They are not waterways or taxiways so what are they?
They are in fact waterways: irrigation ditches or channels. The Jeppesen airport chart legend lists them as
32 — Ditches in the vicinity of the airport are depicted.
For example, looking at a Google Maps view of LTBR, the blue line charted west of the runways clearly refers to the Kurutma Kanali/Marmaracık Gölü Kurutma Kanali. The blue lines between the runways are not shown on the Google Maps terrain/relief view, but switching to the aerial imagery view reveals a drainage ditch on either side of Runway 07L. In fact there appears to be another one which Jeppesen does not depict on the south side of Runway 07R.