The Chungshan Cultural Park, part of the National Dr. Sun Yat-sen Memorial Hall of the Ministry of Culture, is the best place for public recreation and exercise. “Lake Tswei,” the artificial lake in the park, enjoys a beautiful environment and covers an area of about 8,000 square meters. The ecological landscape of the water body closely integrated with the cultural environment has become an important ecological and aesthetic landmark in the city. To maintain the health and sustainability of Lake Tswei’s water quality, the hall specially launches the“Lake Tswei Water Quality Improvement Project” by coordinating with the progress of the renovation project to build Lake Tswei into an urban oasis that soothes the citizens’ body and mind.
The National Dr. Sun Yat-sen Memorial Hall stated that the water quality of Lake Tswei is easily affected by climatic factors and the surrounding environment because it is an artificial ecological lake. This results in not only an excessive algae growth but also a significant drop of water clarity, further causing the hidden concerns for the survival of animals and plants and the difficult landscape maintenance. Despite many times of dredging, it can only provide temporary relief without addressing the root cause. The National Dr. Sun Yat-sen Memorial Hall specially convened an on-site consultation meeting on “Lake Tswei Water Quality Improvement” in August, inviting scholars and experts to conduct an on-site survey. It is hoped that the water area can be maintained without the need for changing water and dredging through physical and biological methods to take both water conservation and ecological sustainability into account.
The water quality maintenance measures the hall expects to take include: (I) Regular Water Quality Testing: Since August this year, NTU’s Department of Bioenvironmental Systems Engineering has been commissioned to assist with the testing of water quality. The results indicate that the dissolved oxygen (DO) and pH are maintained within a reasonable range. However, the ammonia nitrogen (NH3) is slightly high, which may affect the aquatic animals. In the future, after the various water quality improvement measures are gradually implemented, regular tracking and testing will continue. (II) Initial Water Quality Treatment: Biological “water purifiers” are applied (The content is magnesium hydroxide, which is harmless to humans, animals, and plants and has no negative effect on the environment.) to remove black sediments and odors from the lake bottom and increase the pH stability of the water. The aeration equipment is also set up to increase water circulation. At the same time, physical filtration is combined to gradually improve the self-purification capability of the lake water. (III) Continuous Monitoring and Maintenance: Regularly publish water quality monitoring data and install the aeration equipment to promote water circulation and improve the oxygen content of the lake water. Besides, coconut fiber mats and plant barriers are installed, and grasses, water snowballs, as well as the Taiwanese native plants such as yellow water lilies and crested floating hearts are planted to create a landscape. This not only enhances biodiversity but also significantly increases the green coverage of the lake, stabilizing the lake environment and forming a self-maintenance system.
While the Dr. Sun Yat-sen Memorial Hall will continue to provide the public with a high-quality recreational environment, it also calls on the public to jointly maintain the environment of the park. Please refrain from throwing waste or feeding the animals in the lake to lower the unnecessary maintenance costs and cooperate with the management regulations so that the public space shared by all citizens will remain clean and beautiful.