某浅水库区由藻型向草型转变的过程及水环境特征分析

Analysis of the Process of Transformation from Algal Type to Grass Type in a Shallow Reservoir Area and the Characteristics of Its Water Environment

在某浅水富营养化库区,在气象、气候条件和物理、外源负荷相似的情况下,经过几年的治理,该库区水体从"藻型浊水态"转变成"草型清水态"[1]。文章针对固定区域,从区域水体特点入手,阐述水体由藻型向草型转变的过程并从多年来积累的水质数据作为切入点,对藻型和草型水体的水环境特征进行探讨,力求从实践中获得更多促使"藻型浊水态"向"草型清水态"的转变且长久稳定在"草型清水态"的方法。结果表明:该库区在处于藻型时全年水体浑浊,透明度较低,藻类生长量较高;在处于草型时全年水质良好,透明度高,沉水植物量较大。

In a shallow eutrophication reservoir area,under the condition of similar meteorological and climatic conditions,as well as similar physical and external loads,after several years of treatment,the water body in the reservoir area has changed from "algal turbid water state" to "grassy clear water state".In view of the fixed area,starting from the characteristics of the regional water body,this paper expounds the process of the transformation of the water body from algae type to grass type,and probes into the water environment characteristics of the algal type and grass type water body from the water quality data accumulated over the years,in order to strive to obtain more methods from practice to promote the transformation from "algal turbid water state" to "grassy clear water state" and stabilize in the "grassy clear water state" for a long time.The results showed that the water body was turbid,the transparency was low and the algae growth was high when the reservoir area was in algal type,and the water quality was good,the transparency was high and the quantity of submerged plants was large when it was in grass type.