Laboratory of Water Environment Engineering, Division of Bioproduction Environmental Sciences, Department of Agro–Environmental Sciences, Faculty of Agriculture, Kyushu University
九州大学大学院農学研究院環境農学部門生産環境科学講座水環境学研究室
Laboratory of Water Environment Engineering, Division of Bioproduction Environmental Sciences, Department of Agro–Environmental Sciences, Faculty of Agriculture, Kyushu University
九州大学大学院農学研究院環境農学部門生産環境科学講座水環境学研究室
Hanoi, the 1,000–year–old capital of Vietnam, has over 100 lakes which play a very important role in creating the landscape, as well as being the habitat for a variety of aquatic animals. However, as closed bodies of water, these lakes are facing a wide range of water quality problems due to their poor rate of exchange with external water sources. Thermal stratification, in particular, which is highly dependent upon meteorological conditions, has a great impact on the quality of their water. To gain insight into this problem, Truc Bach Lake, which is located in the northwest of Hanoi’s central region, was chosen as a typical lake that would thus be a favorable place to conduct a case study. In our research, the water quality variables of Truc Bach Lake during its daily cycle were measured on site and were sampled periodically (over four seasons) for laboratory analysis, in order to investigate the vertical dynamics of its water quality during a daily cycle, as well as the seasonal changes that take place in a single year. The results of this study provide much valuable information on the temporal and spatial changes of the lake’s water quality over the course of a year. They also provide a foundation for the simulation of the water quality dynamics in the targeted lake, which would provide a useful basis for further research.
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