Study the biomass impact on water improvement effect by different kinds of submerged macrophytes. The results interpreted from the experiments provide the reference to project.
研究生物量对不同沉水植物水质改善效应的影响，从试验得出生物量的影响结果，为工程应用提供参考；
The rate of coverage of forest have an evident effect on many environment factors such as soil and water reservation ecological environment improvement.
森林覆被率在保持水土、涵养水源、改善生态环境方面起着很大作用。
Objective To explore the effect of water improvement and the sanitary protection of water sources in Linyi City.
目的了解临沂市改水效果及水源的卫生防护状况。
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