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《Journal of Arid Land Resources & Environment》 1988-02
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Yang Qinye;Zheng Du;Liu Yanhua Institute of Geography, Chinese Academy of Sciences and State Planning Commission  
The dry valleys in the Hengduan Mountains are conspicuous in physico-geography and particularly in economic development. They are located in deepgorges and sandwiched by high mountains in the generally subtropical, humidSouthwest China.They are widely distributed and scattered in the regions oftheNu,Lancang,and Jinsha rivers as well as other rivers in the HengduanMountains. There total area amounts to about 112000 Square Kilometreswhich accounts for about 2.1 per cent of the Hengduan Mountains areas. Geo-ecological feature of the dry valleys in the Hengduan Mountainsis discussed in this paper.It pointed out that the structure of the ecosystemin the dry valleys is quite fragile. The major problem is drought. Land canbe damaged easily, but can hardly restored. According to the combination ofthe temperature and moisture, four subtypes and nine patterns of the dryvalleys may be given. Problems of economic development in the dry valleysare also discussed in the paper.
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