谢永玉1a,瞿思敏1b,王轶凡2,勾建峰1b,陈学秋1b,单帅1b,李大辰1b.长江下游小流域不同降雨类型水文要素同位素特征分析[J].水电能源科学,2019,37(1):45-48
长江下游小流域不同降雨类型水文要素同位素特征分析
Analysis on Isotopic Characteristics of Hydrologic Elements for Different Rainfall Types in a Small Watershed of the Lower Reaches of Yangtze River
  
DOI:
中文关键词:  长江下游  氢氧同位素  台风雨和梅雨  降雨  地表水  土壤水  河水  时程效应
英文关键词:lower reaches of the Yangtze River  oxygen and hydrogen isotopes  typhoon events and Meiyu rain  precipitation  surface water  soil water  river water  temporal variation
基金项目:国家重点研发计划(2016YFC0402703);中央高校基本科研业务费专项资金资助项目(2017B10914,2018B44714);国家自然科学基金项目(41371048,51479062,40901015)
作者单位
谢永玉1a,瞿思敏1b,王轶凡2,勾建峰1b,陈学秋1b,单帅1b,李大辰1b 1. 河海大学 a. 水文水资源与水利工程科学国家重点实验室; b. 水文水资源学院 江苏 南京 210098; 2. 宁波弘泰水利信息科技有限公司 浙江 宁波 315033 
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中文摘要:
      为分析长江下游小流域不同降雨类型水文要素的同位素特征,结合氢氧同位素资料,分析了长江流域下游和睦桥小流域两场降雨事件(台风雨和梅雨)中各水文要素。结果表明,各水文要素同位素的时程效应较为显著。台风雨事件中降雨同位素愈来愈贫化,而梅雨事件中的降雨同位素具有显著富集趋势。各水体同位素值围绕大气水线分布,表明均由降雨产生。河水同位素变化不明显且分布最为集中,体现了降雨同位素特征的消减性。土壤水同位素由于在土壤水入渗过程中发生了混合作用,造成δ2H-δ18O相关点位于大气水线的右下方且集中分布。研究成果可为长江下游流域的径流成分划分与水循环机理研究提供参考。
英文摘要:
      In order to study the isotopic characteristics of hydrologic elements for different rainfall types in small watershed of the lower reaches of the Yangtze River, the precipitation, surface water, soil water and river water based on oxygen and hydrogen isotopes were analyzed for two rainfall events (typhoon event and Meiyu rain event) in Hemuqiao catchment, in the lower reaches the of Yangtze River. The results show that the isotope of hydrologic elements exhibited a strong temporal variation. Precipitation isotope in typhoon events had depleted trend contrast with the enrichment characteristics in Meiyu rain event. All the isotopes were distributed around local meteoric water line indicating they were originated from the precipitation. The river isotope had the most concentrated distribution and this result showed the weakness in precipitation isotope. Soil water isotope had a distribution under local meteoric water line because of mixture in soil water infiltration. These results can provide references for study on the runoff generation and water circulation mechanism in the lower Yangtze River basin.
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