The remedy for the West River is that the shallow part just at its junction with the sea between Wangkum and Sanchoo Islands should be trained by walls on both sides—a long one on the left, and a short one on the right—so as to concentrate the current to cut the river bed here to a depth of twenty feet or more. In this way, a uniform depth is secured, for after passing the Moto Entrance the West River has an average depth of 20 to 30 feet right along its whole course through this delta. With a uniform depth all the way to the sea, the undercurrent will run quickly and drain off the flood water more rapidly. Besides the deepening process, both shores should be regulated so as to give a uniform width to the channel. Midstream shoals and islands should be removed.
The East River Valley does not suffer so severely from floods as those of the other two rivers, the West and the North, and its remedy will be provided in the regulation of the river for navigation. This will be dealt with in that connection.
Second, the problem of navigation in the Canton Delta in connection with the three rivers. In dealing with this question we commence with the West River. In former days the traffic between the West River Valley and Canton always passed through Fatshan and Samshui, a distance of about 35 miles. But since the silting up of the Fatshan Channel below Sainam, the traffic has to take a great detour by descending the Pearl River southeastward as far as Fumen, then turn northwest into the Shawan Channel, then south-
