| 2017年最大降水对再生水受水河道径流组成的影响 |
| 摘要点击 3462 全文点击 1069 投稿时间：2017-04-04 修订日期：2018-05-31 |
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| 中文关键词 2017最大日降水 3年一遇 再生水 氢氧同位素 径流组成 潮白河 北京 |
| 英文关键词 maximum daily precipitation in 2017 3.3 return periods reclaimed water hydrogen and oxygen isotopes slope runoff component Chaobai River Beijing |
| 作者 | 单位 | E-mail | | 廖安然 | 中国科学院大学, 北京 100049
中国科学院地理科学与资源研究所, 陆地水循环及地表过程重点实验室, 北京 100101 | liaoar.16b@igsnrr.ac.cn | | 宋献方 | 中国科学院地理科学与资源研究所, 陆地水循环及地表过程重点实验室, 北京 100101
中国科学院大学资源与环境学院, 北京 100049 | songxf@igsnrr.ac.cn | | 张应华 | 中国科学院地理科学与资源研究所, 陆地水循环及地表过程重点实验室, 北京 100101 | | | 杨丽虎 | 中国科学院地理科学与资源研究所, 陆地水循环及地表过程重点实验室, 北京 100101 | | | 卜红梅 | 中国科学院地理科学与资源研究所, 陆地水循环及地表过程重点实验室, 北京 100101 | | | 马英 | 中国科学院地理科学与资源研究所, 陆地水循环及地表过程重点实验室, 北京 100101 | | | 韩冬梅 | 中国科学院地理科学与资源研究所, 陆地水循环及地表过程重点实验室, 北京 100101
中国科学院大学资源与环境学院, 北京 100049 | | | 秦文婧 | 中国科学院大学, 北京 100049
中国科学院地理科学与资源研究所, 陆地水循环及地表过程重点实验室, 北京 100101 | | | 杨胜天 | 北京师范大学地理学与遥感科学学院, 遥感科学国家重点实验室, 北京 100875 | |
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| 中文摘要 |
| 再生水受水河道水文条件作为河流水生环境及生化反应重要控制因子，会受到丰水季降水汇入的影响.以潮白河典型受水河道——顺义段为例，通过丰水期前（2017-06-11）、降水中（2017-07-06）、降水后（2017-07-08、2017-07-09）河水中氢氧同位素特征和氯离子浓度的变化，识别地表径流组成对2017年最大日降水量（重现期3.3a）的响应，揭示河流汇水过程径流组成的时空差异及原因.结果表明，在降水初期，降水中氢氧同位素主要受雨量效应影响，后期微小变幅主要受水汽来源差异影响，整个河段接受降水的同位素值相近.降水后3 d内坡地汇流尚未停止，在各断面占比各异；坡地汇流占比沿程增加（2%~85.6%），再生水占比沿程减少（90%~67%），再生水通过优先通道到达下游断面.降水后3 d内SY01~SY05断面水量由坡地汇流、再生水、原位水组成，有明显的河网汇水过程，SY06~SY07断面水量由坡地汇流及原位水组成. |
| 英文摘要 |
| The hydrology of rivers recharged with reclaimed water is an important factor controlling its aquatic environment and biochemical processes, which change during the wet season. To understand the impacts of precipitation on hydrological conditions, water samples were collected from seven sites in three periods (before the wet season and during and after the maximum precipitation in July 2017, with 3.3 return periods) throughout a reclaimed water intake area of the Chaobai River in the Shunyi District, Beijing. The hydrogen-oxygen isotope characteristics and chloride content were measured. The results show that the hydrogen and oxygen isotopes of precipitation are mainly affected by the amount of the effect. The minor variation in the later period is due to changes in the sources of moisture. Within three days after precipitation, the slope runoff continues and the fraction of each section varies greatly. The reclaimed water reaches the downstream section through the preferred pathway. The water component ratio of the slope runoff increases from 2% to 85.6% in the direction of the flow, while the reclaimed water ratio decreases from 90% to 67%. The stream remains effluent from sections SY01 to SY05 that are recharged by the slope runoff, reclaimed water, and in-site river water, while the sections SY06 to SY07 are mainly recharged by the slope runoff and in-site river water within three days after the precipitation (the stream effluent is unremarkable). |
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