本文通过对程海沉积物C、H、N等元素的含量及其比值的综合分析 ,辨识了程海沉积物有机质H/C及C/N值的环境指示意义 ,发现它们均可作为程海水位波动及区域气候干湿变迁的替代性指标。研究结果表明 :程海的水位和区域气候干湿变化明显经历了两个不同的阶段 ,但整体上程海水位一直呈下降趋势 ,反映区域气候整体上向干旱化方向发展 Through comprehensive analysis of the content of C, H, N and other elements in Chenghai sediments, this paper identified the environmental significance of H / C and C / N values ​​of organic matter in Chenghai sediments and found that they can be used as Cheng Haishui Bit fluctuations and regional climate change of wet and dry alternative indicators. The results show that there are two distinct stages in Chenghai’s water level and regional climate. However, the overall water level of Chenghai Sea has been declining all the time, reflecting the overall development of regional climate towards aridification