All channels are irrigated from the letter Vav ו, which is the river that is drawn-out and emergent from Eden. And it is the channel that emerges from the wellspring of water which is Yod י, and from which extends Hei ה, which is ‘higher sea’.
And come see: there are nine vowel points from qametz ָ to shureq ּ, and all are called ‘channels’ and ‘fountain-sources’, for the letters, which are included in ‘the ground’, which is the Lower Shekhinah, which is called ‘garden’ (gan, =53), – comprised of the fifty-three weekly divisions of the Torah.