水生生物评价是评价水生生态系统生态质量的有效方法，因为生物群落综合了水化学的环境效应。选取Lumding镇10个半集约化养殖的鱼塘进行水生生物调查。研究时间为2009年7月至2011年6月，为期两年。对某鱼塘水体的pH、溶解氧、游离二氧化碳、TDS、总碱度、总硬度、sp.电导率、透明度和BOD等参数进行了研究。P^H 范围为6.1 ~ 8.5。温度范围:18⁰C-32⁰C。颜色从浅绿色到脏绿色。透明度17-42cm，溶解氧3.2-8.0 ppm，总碱度7.9-20.0ppm，硬度60-135 ppm，电导123-247µmhos/cm, BOD 3.1-5.0ppm。浮游植物以绿藻和蓝藻组为主，浮游动物以原生动物、轮虫组为主。共有30种属于绿藻科。 Cyanophycae were identified and a total of 20 species of Rotifera, 2 species of Cladocera and 1 genus of Copepods were found. The present study is expected to help achieve better and higher yield of fish by the fish farmer with increasing awareness regarding the hydrobiological feature of the pond and implement scientific management practices accordingly.