Thanks to Paul, who sent me a video which may be relevant to the nature of the “T” channel which Richard and I discussed on the recent programme he posted.
The video is interesting in its own right and discusses a large half buried feature in Zawyet El Aryan which was thought to be an unfinished pyramid, but the person who made the video above thinks it was part of a water / reservoir system that they built. i.e. could the T-channel on mars be part of a vast reservoir of water transport/irrigation system? It sure is an interesting explanation!