2002年6月和9月调查,大伙房水库夏季浮游物现存量为20.560mg/L,秋季为6.126mg/L。夏季现存量显著高于秋季,为秋季的3.4倍。浮游物平均现存量为13.341mg/L,其组成中有机碎屑的比例达到76.86%,浮游生物仅占23.14%。全库浮游物、有机碎屑及浮游生物的最大值均以上游的夏季为最高,秋季水库上、中、下游差异不显著。水库当年浮游物为鲢、鳙可提供的鱼产潜力为993kg/hm2。 In June and September 2002, the existing amount of summer floats in Dahuofang Reservoir was 20.560mg / L in summer and 6.126mg / L in autumn. The stocks in summer were significantly higher than those in autumn, 3.4 times of that in autumn. The average existing stock of floating objects was 13.341 mg / L, the proportion of organic debris in the composition reached 76.86% and the plankton accounted for only 23.14%. In the whole reservoir, the maximum of organic debris and plankton all reached the highest in the summer in the upper reaches, while there was no significant difference in the upper, middle and lower reaches in the autumn. The reservoir was silver carp in that year, and the potential of fish production provided by this plant was 993kg / hm2.