Recently
released "2011 Yangtze Conservation and Development Report" shows that the
Yangtze River nearly 30 years away for more than one square kilometer area of
the lake 96. The
second lake from our latest survey data show that nearly 50 years, our country
lost more than 1 square kilometer area of the lake up to
243.
The survey work in the Ministry of Science and a special national basis, supported by the CAS Nanjing Institute of Geography and Limnology, led implementation. This is our first established in order to grasp the status quo of China's major lakes, lakes database for the purpose of improving China's major projects.
Survey in 2005 and 2006 as the base year, the lake volume, area and distribution status of the remote sensing survey, and conducted an area of major freshwater lakes larger than 10 square kilometers of water, water quality and biological resources in the system investigated.
"North and northwest arid area of the lake water level dropped and alkaline salt serious decline, plateau lakes, lake water and lake volatility, the Yunnan-Guizhou Plateau lakes biodiversity loss and water quality decreased significantly, down the eastern plains of lakes and water storage capacity rich nutrition of the issue outstanding. "CAS Nanjing Institute of Geography and Limnology, China's Yang Guishan commented on changes in the overall trend of the lake.
Lakes also brought changes to the biological diversity had a significant impact. The most representative is the Yangtze River basin lakes of indigenous fish by the majority of invasive species, blocking and over-fishing rivers and lakes fishing and other factors indiscriminate endangered.
Yang Guishan, for example, the Dianchi Lake in the 1950s, indigenous fish recorded 26 species distributed in 2000 after only four lakes of the species in the two surveys in 2007-2010 found only 1 species. Similarly, the Lugu Lake in Yunnan, that there are four kinds of indigenous fish, but after the introduction of alien fish species in the two surveys in 2007-2008 found only 1 species. According to the comparative analysis of survey data, as China's third largest freshwater lake, fish species from the 1960s to the present decline of 106 kinds of 60-70 species of migratory fish is almost extinct.
Aquatic plant diversity also decreased significantly. The Dianchi Lake, for example, in the 1950s recorded more than 100 species of aquatic plants, the two most recent survey found 19 species, about 80% of species disappeared. The remaining number of lakes and aquatic species are also varying degrees of reduction.
Today, people, primarily by controlling land-based pollution, lake sediment dredging, water diversion and drainage of ecological restoration and other measures to control the lake environment. But Yang Guishan, with special emphasis on science and long-term lake management requires understanding the short-term temporary and long-term cure requires a combination of the progressive control of point source and point source watershed pollution problems, from the perspective of the lake basin as a whole - an integrated implementation of integrated river basin management.
The survey work in the Ministry of Science and a special national basis, supported by the CAS Nanjing Institute of Geography and Limnology, led implementation. This is our first established in order to grasp the status quo of China's major lakes, lakes database for the purpose of improving China's major projects.
Survey in 2005 and 2006 as the base year, the lake volume, area and distribution status of the remote sensing survey, and conducted an area of major freshwater lakes larger than 10 square kilometers of water, water quality and biological resources in the system investigated.
"North and northwest arid area of the lake water level dropped and alkaline salt serious decline, plateau lakes, lake water and lake volatility, the Yunnan-Guizhou Plateau lakes biodiversity loss and water quality decreased significantly, down the eastern plains of lakes and water storage capacity rich nutrition of the issue outstanding. "CAS Nanjing Institute of Geography and Limnology, China's Yang Guishan commented on changes in the overall trend of the lake.
Lakes also brought changes to the biological diversity had a significant impact. The most representative is the Yangtze River basin lakes of indigenous fish by the majority of invasive species, blocking and over-fishing rivers and lakes fishing and other factors indiscriminate endangered.
Yang Guishan, for example, the Dianchi Lake in the 1950s, indigenous fish recorded 26 species distributed in 2000 after only four lakes of the species in the two surveys in 2007-2010 found only 1 species. Similarly, the Lugu Lake in Yunnan, that there are four kinds of indigenous fish, but after the introduction of alien fish species in the two surveys in 2007-2008 found only 1 species. According to the comparative analysis of survey data, as China's third largest freshwater lake, fish species from the 1960s to the present decline of 106 kinds of 60-70 species of migratory fish is almost extinct.
Aquatic plant diversity also decreased significantly. The Dianchi Lake, for example, in the 1950s recorded more than 100 species of aquatic plants, the two most recent survey found 19 species, about 80% of species disappeared. The remaining number of lakes and aquatic species are also varying degrees of reduction.
Today, people, primarily by controlling land-based pollution, lake sediment dredging, water diversion and drainage of ecological restoration and other measures to control the lake environment. But Yang Guishan, with special emphasis on science and long-term lake management requires understanding the short-term temporary and long-term cure requires a combination of the progressive control of point source and point source watershed pollution problems, from the perspective of the lake basin as a whole - an integrated implementation of integrated river basin management.
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