| 变化环境下渭河流域水文干旱演变特征剖析 |
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| 引用本文： | 任立良,沈鸿仁,袁飞,赵崇旭,杨肖丽,郑培丽.变化环境下渭河流域水文干旱演变特征剖析[J].水科学进展,2016,27(4):492-500. |
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| 作者姓名： | 任立良 沈鸿仁 袁飞 赵崇旭 杨肖丽 郑培丽 |
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| 作者单位： | 1.河海大学水文水资源与水利工程科学国家重点实验室, 江苏 南京 210098; |
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| 基金项目： | “十三五”国家重点研发计划资助项目(2016YFA0601504);国家自然科学基金资助项目(41323001)~~ |
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| 摘 要： | 环境变化影响区域水资源的可持续开发利用，导致水文过程出现非平稳特征，需发展非平稳水文干旱评估方法。选取渭河流域为研究区，依据流域内2个水文站、62个雨量站和24个气象站1961-2013年数据，基于可变下渗容量模型定量分离气候变化和人类活动对径流衰减的贡献；采用标准化径流指数（Standardized Runoff Index, SRI）剖析水文干旱时空演变特征；提出多种SRI参数化方案，对比评定各方案表征非平稳干旱的合理性以及环境变化对干旱演变的影响作用。结果表明:自1991年以来渭河流域年径流量呈显著衰减趋势，人类活动是径流演变的主要因素，对咸阳和华县站径流量变化的贡献率分别为-66.7%和-71.0%；时变参数方案计算的干旱指数能合理重建历史水文干旱序列；人类活动是渭河流域1991年以来短历时水文干旱发生的主导因素，气候变化主要影响长历时旱涝的演变趋势。
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| 关 键 词： | 气候变化 人类活动 径流 水文干旱 时空特征 渭河流域 |
| 收稿时间： | 2015-10-22 |
Hydrological drought characteristics in the Weihe catchment in a changing environment |
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| REN Liliang;SHEN Hongren;YUAN Fei;ZHAO Chongxu;YANG Xiaoli;ZHENG Peili.Hydrological drought characteristics in the Weihe catchment in a changing environment[J].Advances in Water Science,2016,27(4):492-500. |
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| Authors: | REN Liliang;SHEN Hongren;YUAN Fei;ZHAO Chongxu;YANG Xiaoli;ZHENG Peili |
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| Affiliation: | 1.Sate Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China;2.College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China |
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| Abstract: | Environmental change not only quantitatively affects water resources, but also causes non-stationarity in hydrological processes, which challenges the applicability of traditional drought assessment methodologies. Based on data for 1961 to 2013 from two hydrological stations, 62 rain gauge stations, and 24 meteorological stations within the Weihe catchment, this study evaluated the effect of climate change and human activities on runoff reduction using a macro-scale distributed hydrological model along with the Variable Infiltration Capacity (VIC) model. The spatiotemporal characteristics of hydrological drought were analyzed by the Standardized Runoff Index (SRI) which was calculated by multi-parameterization schemes. The robustness of SRI under non-stationarity as well as the impact of environmental change on the hydrological evolution were analyzed. Results showed that the observed significant runoff reduction at the Xianyang and Huaxian hydrological stations in the period of 1991-2013 was mainly due to human activities, which accounted for -66.7% and -71.0% of the total change, respectively. The SRIv series that were based on the time-variant parameterization scheme, could rationally reproduce the historical hydrological droughts. It was also found that after 1991 human activities mainly resulted in the short-term drought fluctuation and climate change mainly led to the trends of droughts and floods in the Weihe catchment. |
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| Keywords: | climate change human activity runoff hydrological drought spatiotemporal characteristics Weihe catchment |
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