In fact , in the photo, the region is apparently planted out in garden or crop plots and has long since been built on with dwellings and other buildings. The area circled on the ridge-top of that part of the Moriah complex would in fact have been ideal for a threshing floor as the prevailing breeze most predominantly from north-west meaning that chaff would blow south-eastward along the ridge, down the Kidron Valley and away from the city area (also see at right the prevailing wind rose for Jerusalem).
Solomon’s temple was built somewhare near the area circled in orange, above the Gihon Spring whose gushing water was piped up into the temple area, supplying copious water for both temple and city. As the Psalm says, ‘there is a river whose streams make glad the City of God.’
See this author’s book ‘THE PLACE, HaMakom: Where Jerusalem’s Temples stood’
Available worldwide from Amazon or other bookstores.