晚唐五代时期金河黑河水系变迁与环境演变

The Water System Variance and the Environmental Evolvement of Heihe River and Jinhe River in the Late Tang and Five Dynasties

汉代黑河(删丹河,或名张掖河,又名弱水)与北大河(金河,又名呼蚕水)交汇入注居延海,汉代以后直到唐代之前都没有记载。《元和郡县图志》记载两水分流,金河流注白亭海,张掖河流注居延海。敦煌文献记载晚唐时金河与张掖河交汇流注居延海,使居延海湖面出现一个恢复期。此外,金河和黑河流域地区居民结构变化、农业人口和用水量减少、黑河径流量增加也是居延海湖面增加的原因。

The Han Heihe River, which was also called as Shandan River or Zhangye River, alias Ruoshui, flowed together with Beidahe River （alias Jin River or also known as Huchanshui） and poured into Juyanhai Lake. But it was not recorded during the period from the Han Dynasty to the Tang Dynasty. According to Yuanhe Junxian Tuzhi（a historical record of the area）, the two rivers distributed, the Jin River pouring into Baitinghai Lake and Zhangye River into Juyanhai Lake. It is recorded in the Dunhuang documents that in the late Tang Dynasty both Jin River and Zhangye River flowed into Juyanhai Lake, raising the water level of Juyanhai Lake at a period of convalescence. Furthermore, the water level increase of Juyanhai Lake also resulted from the change in the population structure in the drainage areas of Jin River and Heihe River, the reduction of the agricultural population and water consumption,and the run-off enhancement of Heihe River.