GRACE-Based Hydrological Drought Evaluation of the Yangtze River Basin, China
文献类型：SCI/SSCI论文
| 作者 | Zhang D.; Zhang, Q.; Werner, A. D.; Liu, X. M.; Pei, T.
|
| 发表日期 | 2016 |
| 关键词 | Hydrometeorology Hydrology Physical Meteorology and Climatology water storage changes 3 gorges dam climate experiment gravity recovery mass anomalies variability challenges depletion extremes |
| 英文摘要 | In this study, hydrological drought in the Yangtze River basin (YRB) is characterized based on Gravity Recovery and Climate Experiment (GRACE) total water storage (TWS). An artificial neural network approach is applied to extend the GRACE TWS observations (2003-12) to a longer TWS time series (1979-2012), which is well matched (Nash-Sutcliff efficiency of 0.83) to the GRACE data. Hydrological drought is identified by water storage deficit (WSD; the shortfall in TWS from the average value) in three consecutive months. The method builds on previous research by considering potentially ineffective interdrought events and by characterizing drought recovery time from a multidecadal TWS time series. The results show that the YRB was in hydrological drought 29 times during 1979-2012, and the three subbasins of the YRB (upper, middle, and lower YRB) experienced between 21 and 28 hydrological drought events during the same period. The drought recovery time, defined as the time required for WSD to recover to average conditions, is evaluated by a simple statistical approach based on the empirical cumulative distribution function. The average drought recovery time is 3.3 months for the entire YRB and ranges from 2.3 to 3.4 months for the three subbasins. The severest YRB drought occurred during 2003-08 as a result of below-average precipitation, high temperatures, and intense human activities. The results demonstrate that GRACE data are useful for reconstructing the TWS time series for a large river basin, from which hydrological drought can be characterized, and for investigating spatial and temporal trends in water storage conditions. |
| 出处 | Journal of Hydrometeorology |
| 卷 | 17 |
| 期 | 3 |
| 页 | 811-828 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1525-755X |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/43347]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Zhang D.,Zhang, Q.,Werner, A. D.,et al. GRACE-Based Hydrological Drought Evaluation of the Yangtze River Basin, China. 2016. |
入库方式： OAI收割
来源：地理科学与资源研究所
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