2003•Annual economic survey .../Annual economic survey - Central Bank of Trinidad and TobagoRequires access
Natural Grassland Protection and Construction in the Source Area of Yellow River.
Yu Wu
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Abstract
The source area of the Yellow River is situated at the hinterland of eastern Qinhai_Tibetan Plateau.It is between 33°30′～35°40′N,95°25′～99°25′E longitude. The area with altitudes ranging from 4300 to 4800 m.The climate features are the type with the alpine and continent.Investigation and study on the natural grassland of 25 years were analyzed and the elementary knowledge into present condition of the source area of the Yellow River was discussed.The changing ways of natural grassland by the natural factors and human activities was analyzed.The results showed that dry grassland,the natural grassland of Yellow River changed but the situation was not very serious,and the change was lead mainly by the natural factors.Further the problem of protection,construction,further development be considered in the must.