5.— SOME NOTES ON IRRIGATION IN 

 CAPE COLONY. 



By W. A. LK.;r;, M.I.C.E. 



The extensive British possessions in Soutli Africa include all 

 varieties of climate from that of the hot, arid «lesert to a 1,'enial 

 temperate one resembling that of southern Europe. 



Rainfall. — The rainfall varies from a mean of about 2}j ins. per 

 aimum in the north-western district of the Cape Colony to between 



Dl ACR A 



N° I 



SHEWING PERCENTAGE OF RUNOFF 

 IN RELATION TO RAINFALL 



Julj Au^;" Sfpli-- Oth\- Nov-ir Dec'" Jonu'.' Fekv Morch Apr.L Mcy J.- 



40 and 50 ins. in the coastal regions of Natal, witli a still liigher pre- 

 cipitation at a few local centres, notably the highlands in the neigh- 

 bourhood of the Cape — a narrow strip extending from the coast at 

 Table Mountain to Ceres, a distance of about 100 miles, within which 

 the ainiual rainfall ranges up to 80 ins. Over the greater portion of 

 the country — Natal, the Orange River Colony, the Transvaal and the 

 north and east of the Cape Colony — the rain falls chiefly in the summer. 



