给水排水
給水排水
급수배수
2009年
11期
140-145
,共6页
铜绿微囊藻%竖向分布%上浮速度%下向流动
銅綠微囊藻%豎嚮分佈%上浮速度%下嚮流動
동록미낭조%수향분포%상부속도%하향류동
Microcystis aeruginosa%Vertical distribution%Floating up velocity%Down-flow
对天津于桥水库中铜绿微囊藻竖向分布及其上浮速度进行了测定,在大约3倍透明度水深处藻类数量最多,向上或向下,藻类数量均减小.在无光条件下,上浮速度≤1 cm/min的铜绿微囊藻占77%,上浮速度1～1.5 cm/min的藻类占10%,上浮速度1.5～2 cm/min的藻类占6%,还有7%的铜绿微囊藻上浮速度大于2 cm/min.当向下的流速达到1.65 cm/min时,基本能阻止铜绿微囊藻的上浮.竖向水力混合能将表层藻类输送到下层,从而抑制藻类的生长.
對天津于橋水庫中銅綠微囊藻豎嚮分佈及其上浮速度進行瞭測定,在大約3倍透明度水深處藻類數量最多,嚮上或嚮下,藻類數量均減小.在無光條件下,上浮速度≤1 cm/min的銅綠微囊藻佔77%,上浮速度1～1.5 cm/min的藻類佔10%,上浮速度1.5～2 cm/min的藻類佔6%,還有7%的銅綠微囊藻上浮速度大于2 cm/min.噹嚮下的流速達到1.65 cm/min時,基本能阻止銅綠微囊藻的上浮.豎嚮水力混閤能將錶層藻類輸送到下層,從而抑製藻類的生長.
대천진우교수고중동록미낭조수향분포급기상부속도진행료측정,재대약3배투명도수심처조류수량최다,향상혹향하,조류수량균감소.재무광조건하,상부속도≤1 cm/min적동록미낭조점77%,상부속도1～1.5 cm/min적조류점10%,상부속도1.5～2 cm/min적조류점6%,환유7%적동록미낭조상부속도대우2 cm/min.당향하적류속체도1.65 cm/min시,기본능조지동록미낭조적상부.수향수력혼합능장표층조류수송도하층,종이억제조류적생장.
The vertical distribution of Microcystis aeruginosa and its floating up speed in water were studied in Yuqiao reservoir of Tianjin City. It showed that the amount of Microcystis aeruginosa in the depth of 3 times water transparency reached the maximum and it decreased with the increasing and decreasing of the depth. Under the condition of no light, the amount of Microcystis aeruginosa with the floating up speed below 1 cm/min was about 77%, between 1～1. 5 cm/min about 10%, between 1. 5～2 cm/min about 6%, above 2 cm/min about 7%. When the water flowing down speed reached 1. 65 cm/min, the up floating Microcystis aeruginosa would be stopped. The vertical hydraulic mixing could transported the surface Microcystis aeruginosa to the bottom of water, so the Microcystis aeruginosa growth would be prevented.
