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China
has over 2.17 million hectares of coastal tidal-flat areas. Tidal flats
are an important kind of land and space resources, and they contain various
mineral, biological and marine resources.
Salt fields China now has more than 50 salt fields along its coast,
with a combined acreage of 337,000 hectares. Sea salt constitutes over
70 percent of China's total production of crude salt, with its annual
output exceeding 20 million tons, ranking first worldwide.
Mariculture A total of 20,278 species of marine organisms have been
verified living in China's offshore waters. Aquatic farms along the country's
coast now cover 164,000 hectares, mainly breeding such shellfish as scallop,
oyster and clam, and laminaria.
Marine energy utilization China's tidal energy reserves amount to
110 million kw, 21 million kw of it being exploitable, which can be used
to generate 58 billion kwh of power annually. Having larger tidal ranges,
Zhejiang and Fujian provinces account for 80 percent of the nation's total
coastal tidal energy resources. The Qiantangjiang estuary in Zhejiang
has a tidal range of 8.9 meters and is an ideal place for a tidal power
plant.
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