Aiming at cleaning up Dianchi Lake, JAAS President Yan Shaohua signed a technology cooperation agreement with Kunming Municipal Government for controlled cultivation and utilization of water hyacinth in Dianchi Lake. Fellow of Chinese Research Academy of Environmental Sciences Jin Xiangcan, standing member of Yunnan Committee of Communist Party of China (CPC) and secretary of Kunming Municipal Committee Qiu He, and others leaders including Yang Yuanyang, Tian Yunxiang and Wang Daoxing attended the signing ceremony.
According to "Guidelines of Prevention and Control of Water Pollution in Dianchi Lake" issued by the Ministry of Environment Protection, Kunming Municipal Government will lay equal emphasis on exogenic pollution control and endogenic nutrients reduction. Kunming will learn from JAAS in its treatment and restoration of Taihu Lake pollution. The controlled cultivation and utilization of 20 square kilometres' water hyacinth will become one of the four important measures for ecological restoration of polluted Dianchi Lake during the Twelfth Five-Year Plan Period.
The two signatories will jointly cultivate and enclosure water hyacinth for 10 square kilometers in the north open waters of Dianchi Lake, 4 square kilometers in Grass Sea and 6 square kilometers in the lower courses and influx of main channels flowing to Dianchi Lake. It is estimated that 1 million tons of water hyacinth will grow, which can absorb approximately 1,500 tons of nitrogen and 430 tons of phosphorus from the water of Dianchi Lake.
According to the agreements, JAAS will send a group of scientists and technicians to push the long-term observation of water quality of the lake in Kunming. JAAS staff will conduct the key technology research and breakthroughs including river pollution load reduction, treatment and resource utilization of agricultural solid wastes as well as collection, treatment and resource utilization of blue-green algae and floating plants like water hyacinth. The research progress reports will be periodically released.