![图片](/uploads/1/4/0/1/14016194/1010624.jpg?0)
•Reclaimed on a large scale
The reclamation of lake wetland leads to loss of fresh water resources and biodiversity destruction. Owing to reclamation, lake number and area decreased.
From 1950 to 1980, China's natural lakes decreased from 2,800 to 2,500, the total lake area reduced by 11.5%. Dongting Lake area has decreased from 4,350 km2 in 1949 to about 2,000 km2 at present. The lower and middle reaches area of the Changjiang River lost lake area of 12,000 km2, the loss rate is 34.16%. Such a large area loss inevitably result in the decline of biological species and population resources. For example Honghu Lake, from the 1950s to the 1980s, lost 45.6% of lakeshore land owing to reclamation, causing the continuous decrease of overwintering waterbird number, the dominant species of the community Fulica atra was replaced by large gooses and ducks, aquatic plants decreased from 92 species in the 1950s to 68 species, fish decreased from 90 species in the 1950s to 31 species. In the Dongting Lake, due to reclamation of lakeshore, fish breeding field and bait field were shrunk artificially, leading to fish yield drop continuously, the annual average fishing capacity per ship dropped by 37.9% compared with the 1950s. Due to reclamation, storage capacity of over 325 X 108 m3 was lost, and fresh water reserve of 35 billion m3 was lost too in China.
Data from:
CHINESE GEOGRAPHICAL SCIENCE
Volume 6, Number 1, pp. 15--23, 1996
Science Press, Beijing, China
The reclamation of lake wetland leads to loss of fresh water resources and biodiversity destruction. Owing to reclamation, lake number and area decreased.
From 1950 to 1980, China's natural lakes decreased from 2,800 to 2,500, the total lake area reduced by 11.5%. Dongting Lake area has decreased from 4,350 km2 in 1949 to about 2,000 km2 at present. The lower and middle reaches area of the Changjiang River lost lake area of 12,000 km2, the loss rate is 34.16%. Such a large area loss inevitably result in the decline of biological species and population resources. For example Honghu Lake, from the 1950s to the 1980s, lost 45.6% of lakeshore land owing to reclamation, causing the continuous decrease of overwintering waterbird number, the dominant species of the community Fulica atra was replaced by large gooses and ducks, aquatic plants decreased from 92 species in the 1950s to 68 species, fish decreased from 90 species in the 1950s to 31 species. In the Dongting Lake, due to reclamation of lakeshore, fish breeding field and bait field were shrunk artificially, leading to fish yield drop continuously, the annual average fishing capacity per ship dropped by 37.9% compared with the 1950s. Due to reclamation, storage capacity of over 325 X 108 m3 was lost, and fresh water reserve of 35 billion m3 was lost too in China.
Data from:
CHINESE GEOGRAPHICAL SCIENCE
Volume 6, Number 1, pp. 15--23, 1996
Science Press, Beijing, China