Effects of hydrodynamics on phosphorus concentrations in water of Lake Taihu,a large,shallow, eutrophic lake of China |
| |
Authors: | Guangwei Zhu Boqiang Qin Guang Gao Lu Zhang Liancong Luo Yunlin Zhang |
| |
Institution: | (1) Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China |
| |
Abstract: | To understand the effect of hydrodynamical process on water phosphorus concentration, wind, wave, and several water quality
indices were observed in Meiliang Bay, a shallow and eutrophic bay locates in north of Lake Taihu. During the 7 day observation
period, wind speed and significant wave height were recorded more than 3 h per day, and water samples were collected in five
water-depth layers once a day. Hydrodynamical disturbance had no significant correlationship with the water quality at the
top layer when the significant wave height was smaller than 30 cm, but it significantly increased suspended solids (SS) concentration
of the bottom water layer. Concentrations of nutrients showed no positive correlationship with SS concentration in the water
body. Intensive sediment resuspension may not have occurred when the hydrodynamic stress on sediment was only a little higher
than the critical stress for sediment resuspension. A new method for confirming the critical stress for intensive sediment
resuspension and nutrient release still needs to be developed. The range of the water quality indices was quite high during
the seven days of observation. High variation seems to be a common character of large shallow lakes like Taihu. |
| |
Keywords: | Shallow lake Hydrodynamics Eutrophication Phosphorus Algae bloom Lake Taihu |
本文献已被 SpringerLink 等数据库收录! |
|