PROBLEMS OF THE ARTESIAN WATER SUPPLY OF AUSTRALIA. 129 



the Darling and Murray rivers were necessarily based upon 

 very imperfect data; since then however much more 

 systematic gaugings of these rivers have been carried out 

 by the engineers of the Public Works Department, and, 

 consequently, it is now possible to obtain fairly accurate 

 data. 



Mr. R. T. McKay, Assistant Engineer of the Works 

 Department, has dealt at considerable length with this 

 question in a paper read before this Society. * The following 

 tables have been copied from his paper: — 

 TABLE OF RAINFALL AND RUN-OFF OF THE DARLING RIVER 

 AT WILCANNIA. Catchment area 235,000 square miles. 





Annual dis- 















charge of the 







Mean rain- 



Run -off 





Year. 



Darling at 



discharge 



feet per 



fall in inches 



in inches 



Percentage 





Wilcannia in 

 millions of 



in cusecs. 



square mile. 



over 

 catchment. 



over 

 catchment. 



discharged. 





cubic feet. 













1894 



253,644 



8,043 



0-034 



26-81 



0-464 



1-73 



1895 



60,234 



1,910 



0-008 



1953 



0-110 



0-56 



1896 



87,733 



2,782 



0-012 



21-14 



0161 



0-76 



1897 



70,199 



2,226 



0-009, 



18-94 



0-128 



0-67 



1898 



57,049 



1,809 



0-008 



15-87 



0-104 



0-66 



1899 



27;783 



881 



0004 



16-04 



0-051 



0-31 



1900 



69,474 



2,203 



0-009 



1633 



0-127 



0'77 



1901 



32,167 



1,020 



0-004 



1571 



0059 



0-37 



1902 



710 



22 



O'OOOl 



11-22 



0001 



001 



TABLE SHOWING RAINFALL AND RUN-OFF OF MURRAY 

 RIVER AT MORGAN. Catchment area 408,000 square miles. 





Annual 





Mean 



Eun-off. 









discharge 



Annual 



annual dis- 











Year. 



in millions 



discharge in 



charge in 



In second 



In inches 





discharged 





of cubic 



acre feet. 



second 



feet per 



over 









feet. 





feet. 



sq. mile. 



catchment 







1895 



509,951 



11,706,945 



16,170 



0039 



0-54 



17-35 



3-12 



1896 



297,939 



6,839,786 



9.448 



0-023 



0-32 



38-21 



1-75 



1897 



277,548 



6,371,669 



8,801 



0-022 



0-29 



16-46 



1-76 



1898 



281,787 



6,468,984 



8,935 



0-022 



0-30 



1528 



1-96 



1899 



274.619 



6,304,428 



8,708 



0-021 



0-29 



15-23 



1-90 



1990 



424,271 



9,739,989 



13,454 



0-033 



0-45 



16-64 



2-70 



1991 



242,321 



5,562,963 



7,684 



0019 



0-26 



14-68 



1-77 



1992 



93,274 



2,141,291 



2,958 



0-007 



o-io 



1064 



0-94 



Means 



300,214 



6,892,007 



9,519 



0-023 



0-32 



15-56 



2-00 



1 Rainfall and discharge of the Murray River and its tributaries, R. T. 

 McKay, this Journal, 1906, Vol. xl., pp. xlvi - lxxxii. 



-Aug. 7, 1907. 



