3.S4 



WATERWORKS OF EAST LONDON. 



BUFFALO WATERSHED. 



Table B. — Run-off from Pirie Catchment Area 



Note. — Mean percentage run-off for the 9 years = 26-95. 



Before framing my first report, dated September 14th, 

 1898, on the proposed augmentation of the water supply, I 

 investigated all existing records of the rainfalls in the Amalinda 

 Watershed to that date, and I came to the conclusion, as I stated 

 in my report, that it was not safe to take the yield of the water- 

 shed as being more than 10 per cent, of the rainfall In report- 

 ing in June, 1904, on the interim pumping scheme." Mr. Charles 

 Anthony adopted the same figure, and probably such a figure 

 may be found safe over a cycle of years. Nevertheless, it is a 

 fact that from the end of the wet season in 191 3 until the mid- 

 winter of 1917 the percentage of ofif-flow from the Amalinda 

 catchment area did not exceed Yi per cent. I mention this fact, 

 as it goes to show what a complex subject this is, and what 

 extreme care it is necessary for hydraulic engineers to exercise 

 in calculating the yield of any particular watershed. 



Refuse Destructor. 



A refuse destructor was commenced in 1899, but it \yas 

 never completed. Notwithstanding the Town Council being 

 warned in writing that the destructor was an apparatus which 

 depended upon the maintenance of heat, and that an attempt 

 to use it in an incomplete and uncovered state would be sure 

 to prove a failure, such an attempt was made ; needless to say, 

 unsuccessfully. 



