A limnological survey of 10 traditional and 18 modern man-made reservoirs i
n the arid northern mountains of Oman was conducted from October 1996 to Ma
rch 1997. The physical and chemical quality of water in these reservoirs wa
s determined and compared against universally accepted water quality standa
rds. Water quality parameters relevant to the study area are discussed. The
water quality of traditional and modern reservoirs was not significantly d
ifferent except for sulfate concentrations. Eutrophication is the major pro
blem in these reservoirs. Management strategies to improve the water use ef
ficiency with particular reference to eutrophication are proposed.