cover the cost of the cuttings. Therefore this part of the regulating work will not be self-paying, but the navigation of the Yangtze, the protection it gives to both sides of the land, and the prevention of floods in the future will amply compensate for such work.
e. From Tungliu to Wusueh
This part of the river is about eighty miles in length. The land along the right bank is generally hilly while that along the left is low. Along its course there are four dilatations. In three of these dilatations the current has cut into the left or northern bank of the river and then turns back into its main course again almost at right angles. At such points the bank is very unstable. Between the channels of these dilatations islands are being formed. See Map IX.
The regulating works of this part are much easier to construct than those of the lower part. The three diverting semicircular channels have to be blocked up at the upper ends, and the lower openings left open for silt to go into at flood seasons in order to reclaim them by the natural process. The other dilatations should be narrowed in from both sides by jetties. A few places will have to be cut, the most important being the Pigeon Island and the turn above Siau Ku Shan. Some of the midstream islands will have to be removed, and a few wide places filled up in order to make the channel uniform, so as to give a regular minimum depth of six fathoms right along the whole course.
