海南岛、台湾岛河流水化学比较研究

A COMPARATIVE STUDY ON WATER CHEMISTRY OF RIVERS IN THE HAINAN ISLAND AND TAIWAN ISLAND

本文对我国两大岛屿——海南岛和台湾岛河流的主要离子化学及河流的物理和化学侵蚀率进行了比较研究,对两岛河流水化学的共同点和差异及其成因进行了探讨。研究表明,无论是河水离子总量,还是物理侵蚀率和化学侵蚀率,台湾岛均显著地高于海南岛。两岛河水中氯离子含量、物理侵蚀率和化学侵蚀率均为东部水系高于西部水系。

The differences of the major ion chemistry of the rivers, and the physical and chemical denudation rates (PDR and CDR, respectively) of the river drainage areas between the Hainan Island and Taiwan Island were studied. The total dissolved solid content of the Hainan Island's rivers (60-80 mg/1), which is influenced by the weathering of granite and basalt, is much less than that of the Taiwan Island's rivers(250 mg/ and more or less) dominiated by the weathering of sedimentary rocks. The river drainage areas in the Taiwan Island is also characterized by a much higher FDR and a higher CDR, due to their extremely abundant precipitation and water-flow, especially, in the Central Ranges which has been rising rapidly since the Pliocence.