Basins with Control Mechanisms


The well known distrubution basin of Vitruvius (8.6.1-2) as depicted by Germain de Montauzan (1908)
The hardware translation of Frontinus 14.3 by Rondelet for the distribution of excess water of Augusta water to the Aqua Marcia and the Aqua Claudia. See the work of Germain de Montauzan (1908)
Naumachia Alsietina in Rome (Transtiberim) fed by the Aqua Alsietina; drawing according Rubin Taylor


Sitifis collecting basin Rusicade / Thapsus storage basin, no drawing available
"Outflow from the (collecting) basin was through a lead pipe in the opposite wall, which could be shut off by a stone sluice gate sliding in a groove." (Wilson 1997)
A settling basin in the Roman aqueduct of Tigava (present Ksar Soltane)
"... at Rusicade (Algeria), where there are also several chambers of varying shape, with an outlet pipe at floor level passing through a circular control room where a stopcock was located" (Wilson 1997).
Two basins one of which with an outlet to the wellknown nymphaeum in Tipasa. A second conduit brought water to the storage and settling basin with one major outlet plus a small drain (?) (Aupert 1974; interpretation questioned by Leveau 1976)
No drawing available
Storage (and settling) basin (300 m3) near Siga. In time of maintenance and repair the water could be diverted over the walls towards the exit channel
The port of Stora "... where there are also several chambers of varying shape , with an outlet pipe at floor level passing through a circular control room where a stopcock was located." (Wilson 1997)


Water coming from the source (vrelo) to Aeona (present Nin) could partially be diverted to a storage basin (agregat) belonging to a mill complex
Drawing of a storage and stettling basin of the aqueduct of Burnum, based on the excavated remains of an unknown basin. Control mechanisms are possibly hypothetical (after Ilakovacs 1984)


Basin with one inlet and three outlets with a complex history in five phases, distributing the water from the N of the Alpilles to Arles and partly to the famous grain mills of Barbegal
A basin like many 'regards' in the Gier-aqueduct of Lyon but 2 x 7 cm wider than the specus, in use as a facility to block the specus by dam joists, to prevent too much pressure on the conduit upstream during maintenance work: the water flow was diverted over the top of the basin
One single set of grooves in the specus. In combination with a second set of grooves in the wall of the specus (conjectured), this facility could regulate the water flow by diverting surplus water to a nearby stream.
Sens, captage a Noe. Arrow left under in the wrong direction.
The basin just upstream of a 1.100 m long aqueduct bridge over the river Moselle which was crossed in two parallel channels; one extra outlet existed which was equipped with a double set of grooves.
Circular distribution basin in Nîmes, with at the inlet one set of grooves, also in the channel floor, possibly for a movable sluice gate, chains and a windlass
The Nîmes basin was also equipped with a set of three holes for plugs or standpipes
The water of the Nîmes aqueduct was (also) distributed by means of 5 pairs of holes in the side wall, whenever necessary to be blocked by plugs
At several places in the Nîmes aqueduct regulation basins were present to be able to divert excess water to nearby stream
Basin in the aqueduct of Reims, 100 m downstream of the source, with two chambers separated by one opening in the common wall
Regulation basin, 28 m from the source of the aqueduct of Saint-Bertrand de Commignes - to divert excess water to a stream nearby
(16) Just upstream of three bridges sluice gates were places in side branches as regulation mechanisms in the aqueduct of Saintes. (17) One attested and one conjectured junction basin with settling facilities ("Bassin de reunion") in the aqueduct of Saintes
About 50 downstream of the original water source of the aqueduct of Fréjus, in the area called La Foux, an ancient bloc of stone was found in the riverbed of the Briancon with a groove referring to a regulation system with a sluice gate.


Just upstream from the settling basin at Grüner Pütz - the start of the aqueduct of Köln/Cologne - Habery maps an overflow facility
(2) Settling basin, possibly also a sanctuary, with two small inlets (Grüner Pütz, aqueduct of Köln/Cologne). (3) A stone with guiding groove for protection to block the channel, was found near the settling basin
(Mini) square basin, just downstream of the rectangular water collection chamber Klausbrunnen in the aqueduct of Köln / Cologne, with overflow
Complex settling and regulation basin just before the aqueduct enters the city of Köln / Cologne (CCAA)


Under the old church of Agiades, the water of different sources was collected: the start of the Eupalinos aqueduct of Samos


No drawing available No drawing available
The aqueduct water of Sepphoris after passing through a settling basin, was stored in a huge underground storage basin with several openings, one of which leading to a 55 m long tunnel. The end the tunnel was blocked by a thick wall in which a lead pipe was set. It was suggested that a bronze valve 50 cm long was set at the other end of the pipe. Only a metal projection that supported the other end of that valve, was found in situ. From there the flow continued in a channel.
Before the [Byzantine] aqueduct enters Shivta there is a basin with three openings / sluice gates. The sides of the openings are 25 - 28 cm high stones with grooves in which wooden boards could be inserted.


Circular shaped distribution basin in Pomepii with additional construction in the floor. Wedges in the horizontal openings (Ohlig) or plugs in the holes (Kessener) of the flow control slabs
Gorge of San Cosimato: 'Down-channel' to facilitate the diversion of water from the Claudia aqueduct into the Marcia channel
Start of the Hadrians loop near Madonella. At ρ a splitting with a plug (3) in the old and a sluice gate (4) in the new channel.
At τ a 'down-channel' (5) for the diversion of Claudia water into the Marcia aqueduct.


Humayma storage basin with regulation
Subterranean distribution basin in Gadara (present Umm Qais) with different height levels (1) and small brick walls with holes (2)
The Nabataean reservoir in Humayma was originally equipped with a passive overflow at 1,35 m above the basin floor. In Roman times this was replaced by a combination of a (conjectured) filtering screen and a large stopcock. The basin was also equipped with an overflow facility


A sidebranch of the aqueduct of Calahorra was equipped with three set of grooves, problable a combination of two sluice gates and a filter screen
The water of the Rio de la Acebeda was partially diverted into the aqueduct channel towards Segovia by means of a moveble sluice gate.
The settling basin before the major aqueduct bridge in the city of Segovia; its drain was equipped with a set of grooves
The regulation basin just before the aqueduct bridge in the city of Segovia. Both outlets were equipped with filtering devices. Surplus water was diverted to a stream nearby - this outlet was equipped with a set of grooves
No drawing available
An overflowfacility at the upstream side of the aqueduct bridge in the city of Segovia
Just before the water of the Proserpina aqueduct (Merida) reached the 'Los Milagros' aqueduct bridge, a small building was constructed. By means of a sliding device one could interrupt the flow so that the water was diverted to one side.


Round table of stone with a stand-up collar with at the edge space for a ring of 12 vertical outgoing pipes, in the middle a somewhat bigger vertical inlet pipe. drawing ©....
The distribution to the town of Banias was through a series of some 20 distribution basins places along the aqueduct channel. The outlet of each basin was a ceramic pipeline leading water to the city.


No drawing available
Basin of Tebourba with one inlet and three outlets equipped with control sluices, two with the well known ones, one with a more complex system.
Two pipes passed through the wall of the cistern into the circular chamber, from which they left at floor level in an outlet gallery. When the chamber was excavated in 1853 a bronze tap was apparently still in situ on one of the pipes.
"… at Sicca Veneria a large 11-chambered cistern was preceded by a small settling chamber, and the exit of water was controlled by pipes leaving at or near floor level, with a stopcock and basin in a tap room, before flowing through an outflow channel". (Wilson 1997)
Sluice gates in a channel between the inlet and the small cistern of Bararus


The channel of the Side aqueduct was fed by water from the Dumanli spring spilling in across the intervening stream of the Manavgat river
Two apertures in both sides of the aqueduct channel, equipped with simple grooves for planks

Pro memori:
Plan of the two times 8 grain mills of Barbegal, mainly fed by the water of a separate aqueduct from Les Baux / Paradou (Les Alpilles). How was the water distributed amoung the two main corridors? Could one corridor be closed during maintenance or repair?
Regulation facility by means of a hole in the floor of the specus to divert water
Two set of grooves in a part of the aqueduct of Frčjus near Fondurance. The water went from left to right; at the bottom side the divertion to the river nearby.