Psalm 46:4 and 5 boast 'there is a river whose streams make glad the City of God, the holy place where the Most High dwells. God is amidst (in the middle of) her; she shall not be moved.' Here, the stream and the presence of God are synonymous--and--in the middle of the city (Hebrew qereb)—within!
The visible symbol of that presence was that ‘bubbling up’ stream called Gihon!
How fitting too, that the stream that typified God did not originate elsewhere and flow through or past the City of David, but bubbled forth right within HaMakom (The Place). Its source was there! From the very place where he sat enthroned in the midst of his people, Living Water and life-giving water flowed!
Gihon, as seen in the accompanying picture, is but a vestige of its former self (remember, its name means 'Gushing Forth') and that is what it once did and its force was used to propel its stream right up into the temple above.
Read 'THE PLACE HaMakom; where Jerusalem's temples stood' for more