Discussion. Kinta River Deviation. (Includes Corrigenda)

Abstract

well as a privilege to do so. The Paper told the story of a relatively small operation, involving a little theory and a lot of sound sense, combined with plenty of co-operation between the Government of Perak, the Department of Irrigation and Drainage, and the mining companies.71. In those who had spent prolonged periods in the East the Paper would arouse a certain nostalgia. The simplicity of the construction methods, the use of local materials, and the local contractors with their unskilled labour all combined to build up a picture with which those who had worked in the East would have been at one time completely familiar. The only feature of that picture which might be unusual was the harmonious and successful co-operation of the three different parties to the venture. 72.He would turn at once, therefore, to the Author's conclusions in $9 57-60, and he submitted that the Author had succeeded in recording the essential features of this scheme for river training. which had involved considerably more than the simple engineering problems presented. When introducing a Paper of this nature it would be a mistake to attempt any summary review of its contents. A synopsis had been provided and he assumed that those who were sufficiently interested to attend the meeting had read the Paper with enough care to understand the objectives of and the limitations attendant on the construction.He felt justified, however, in saying a few words on the subsequent history of the deviation.73. Recent reports indicated that the deviation was functioning as intended, but it was understood that operations at the gauging station referred to in $ 56 had been abandoned. That was a great pity, both from the practical point of view of watching developments, and from that of the possibility of co-ordinating rainfall, run-off and stream gauging which the deviation with its permanent weirs would have afforded.74. Out of a number of photographs received from the Author Mr Montagu had selected four which were of interest. They related to the M.T.D. weir at point F in Fig. 2. The weirs (Fig. 5) bore a family resemblance to all the ancient weir structures in India and elsewhere. They had certain features in common. They were permeable, thus disposing summarily of the uplift pressures problem. The surface of the glacis was deliberately roughened to the utmost possible extent to prevent the establishment of hypercritical flow and thus prevent the conditions precedent to the formation of a standing wave, with its attendant dangers.75. So far as could be gathered from recent reports, these weirs were functioning as intended. Some day, of course, there would be a real cloudburst over the catchment area, the river would come down in catastrophic flood and the weirs would be damaged to a greater or less extent. They would then be repaired. In the meantime -he hoped that the interval would be a long one-a cheap, simple structure served the purpose.