There are 4 levers, and 2 wooden channels, in the aqueducts above the Garden. Climb up at the right side, and locate the start of the water channel at upper left. Turning each of the 4 levers in turn will redirect the flow, and you have to click on both of the wooden channels to drop them into place. The water should flow right along the top, then down and left, and finally down and to the right.
You can't. You have to push all the levers and open all the gates so that the water will flow into the lake.
In the Garden of the Sphinx, climb up to the right and reach the aqueducts. Go to the upper left and begin throwing the levers that will divert the water back to the garden. For the two wooden channels, click on them to lower them. When the water again flows to the Garden, you will get the rose.
It is all the way at the top of the area and you first go up the aqueducts sign and jump to the top. Then flip all of the levers the opposite directions.
In the Garden of the Sphinx (far left on the island), throw the four levers at the top, and water will flow through the aqueduct. You can't push on the channels -- just click on them to drop them into place.
The water to replenish the Garden of the Sphinx comes from the aqueduct. Climb up at the right to reeach the water gates. Clear the path for the water by opening the 4 levers, and click on the two wooden channels to push them down. Once the water is restored, you get the Flower from the Sphinx.
Climb to the aqueducts at the upper left, and throw each of the 4 levers that divert the water flow. You also have to click on the two wooden bridges to lower them.
When opening the aqueduct in the Garden of the Sphinx, you only need to flip each of the four levers once, which will change the way the water is flowing. It doesn't matter what order you flip them, only that each one be thrown the other way.
The Sphinx says that the flower will grow again when the water flows. Go up and right to the Aqueduct, and open the 4 levers and the 2 wooden channels that are blocking the water. When the Garden is flooded, you can get the flower. (Don't miss the tree just above the creature, which has the pomegranates.)
The flower will appear in the Garden of the Sphinx when you restore the flow of water to the garden. Climb up to the aqueducts at the upper right. Turn each of the 4 levers and click on the wooden channels to drop them into place. The water will flow from upper left down to the garden.
The "aqueducts" in the Garden of the Sphinx are at the top. Throw the four levers, and click on the 2 wooden channels, so that water flows through the aqueduct to the Garden.
To get the flower, you have to restore the flow of water to the Garden of the Sphinx. Climb up to the right to reah the Aqueduct. Starting at the upper left, open each of the 4 levers, and click on the two wooden channels to drop them into place. When the flow reaches the garden, you can get the Rose.
After she tells you to get the water flowing, climb up the rope to the aqueducts. Turn the four levers and push down the two wooden boards (channels). After you have them all in the right direction, water flows downwards to the Garden. After that, go down and collect the flower. (also the pomegranates, in the tree above the Sphinx)