visible landmarks. Since the lakes were shallow, stratificationwas assumed to be minimal (WILLIAMS 1981),
no attempt was made to collect water samples at different depths. Lakes were sampled every two months from
November 1999 to September 2001. Most of the inflowing creeks were dry throughout the sampling period and
water level in the lakes was too low to spill into creeks.Hence, creeks were not sampled during this study.