摘要
滇池经过长达 7年、投资 40多亿元的治理 ,在污染源头控制上已经取得了明显成绩 ,在一定程度上缓解了生态环境的进一步恶化。滇池水体水质至今没有好转的根本原因在于对滇池蓝藻爆发机理的认识没有考虑其所处的特殊地理环境。滇池水体富营养化之后 ,是由于较高的大地热流背景和四季如春的气候条件使蓝藻得以不停息地繁殖 ,致使滇池的水生生态系统完全瘫痪 ,水体完全失去自净能力。“抑制蓝藻的繁殖”和“清除水体中的营养物质”两大问题形成了滇池治理中一个难解的死结。解开死结的有效措施是从抚仙湖调清水给滇池换水 ,恢复草海 ,提高湖水自净能力 ,发展水生生态系统 。
The effort made during the past 7 years with investment of more than 4 billion Chinese yuan has made obvious progress in controlling the sources of pollution, which had prevented to some extent the ecologic environment of Lake Dianchi from becoming worse, and laid a foundation for the complete control in the future. The reason why the water quality in Lake Dianchi has not become better up to now is that the special geographic environment of Lake Dianchi was not included when the mechanism of the explosive reproduction of the blue green alga was considered. It is believed that the high terrestrial heat flow background and the warm climate all the year long made the blue green alga grow and reproduce continuously since the water in Lake Dianchi became nitrified, which resulted in complete breakdown of the aquatic ecologic system in Lake Dianchi and the water body has completely lost its self purification ability. The two issues of 'Constraining the reproduction of the blue green alga' and 'removing the nitrified material from the water' formed a deadlock in the control of pollution in Lake Dianchi. An effective measure to open the deadlock is to pump clear water from Lake Fuxian to change the water in Lake Dianchi, and restore the grassland around the Lake, so as to promote its self purification ability, and develop the aquatic ecologic system at the same time to restrain the reproduction of the blue green alga.
出处
《矿物岩石地球化学通报》
CAS
CSCD
2002年第2期86-91,共6页
Bulletin of Mineralogy, Petrology and Geochemistry
关键词
大地热流
滇池
环
影响
污染治理
水体污染
湖泊
control of pollution in Lake Dianchi
Lake Fuxian
terrestrial heatflow
grassland around Lake Dianchi
