Research to determine the effectiveness of various types of economically feasible by-wash spillways for small farm dams in Australia has proved very successful. Full-scale models were used to good effect and the results are considered to be applicable to South African conditions in the construction of sin all earth dams. The use of grass cover to protect spillways is suitable for most purposes and formulae and graphs are presented to assist in design.
Aerial photographic interpretation is used for obtaining qualitative information from aerial photographs. Its methods and potential are possibly not as well known as those of photogrammetry. This paper descriptionbes the principles, requirements and procedures of aerial photographic interpretation. In civil engineering, aerial photographs provide a wealth of information primarily for projects covering relatively large tracts of terrain. Three case histories of the application of aerial photographic interpretation to civil engineering have been chosen to indicate the major savings in time and effort that can result from its application.
The paper reviewed the mutual roles which engineering geologists and civil engineers play. Attributes of the engineering geologist were listed and the engineer's resporisibility to engender continual technical dialogue stated. Some local examples showed the advantages gained from close association of engineer and geologist.