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Atlas of Study on
Background Value of Aquatic
Environment of the Changjiang River Valley
长江流域水体环境背景值研究图集 In Chinese and English
By Institute of Geography,the Chinese Academy of
Sciences,1998 ,68 pages,380x265mm,hard,
Price:US$77+$9 by sea mail
The Changjiang River is the largest one in China,and the third largest
one
in the world.
Its mainstream is 6300 km long,and the drainage area is 18000000km2. The
Changjiang River valley is a famous industrial zone in China,and also
the key region of economic construction and development, so how to utilize
the natural resources rationally,to protect natural environment,to maintain
ecological balance and to promote the sustainable and stable development
of society and economy of this region is an urgent strategic task.
It was based on the research results of background value,made full use
of the superiority that a map has a virual expression,systematically showed
the spatial distribution law of background value of aquatic environment
of the study on background value of aquatic environment of China,particularly
presented the latest result and level of the study on background value
of aquatic environment of the Changjiang River valley. The basic data
used in compiling the atlas were mainly from more than 100 000 data of
field investigation and monitoring for 465 sampling points, only very
small amount of data were from the statistics of Hydrological Yearbook
of the Changjiang River ,all data have entered the computer database,
the sampling points locations are accurate, and the data are complete,
so the atlas is very authoritative.
The atlas consists of 95 maps,which express in the scale of 1:8500000
and 1:12500000 respectively according to the map covering range. Among
these maps there are 18 introductory maps,which mainly reflect the natural
environment features and industrial development characteristics of the
covered region, so as to reveal the internal relation with the formation
of environment background value. The maps of element background value
are the major part of the atlas. There are 77 maps which were compiled
based on the statistical result of determined values of elements in water
facies,sedimentary facies and biological facies, and element types,each
map not only reflects the content level of sampling points but also shows
the content division of elements
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