APPENDICES.
APPENDIX A.
DIVIDE WALL ON LOWER CHENAB CANAL.
(See [page 50], [first footnote].)
Fig. 27.
The Gagera branch of the Lower Chenab Canal—the left-hand branch in [fig. 27]—was found to silt. It was proposed to make a divide wall ([fig. 27]) extending up to full supply level. The idea is unintelligible. The silt does not travel by itself but is carried or rolled by the water. As long as water entered the Gagera branch, silt would go with it. The authorities, who had apparently accepted the proposal, altered the estimate when they received it, and ordered the wall to be made as shown dotted and of only half the height. This was done. The idea seems to have been that the wall would act as a sill and stop rolling silt. This is intelligible, but such sills do not always have much effect on rolling silt. Moreover, there was a large gap, A B, in the wall. The work is said to have proved useless, and proposals have been made to continue the wall from A to B. In this form it is conceivable that it may be of use.
APPENDIX B.
SPECIFICATION FOR MAINTENANCE OF CHANNELS.
(See [page 138].)