Hydrologic Evaluation of TRMM Multisatellite Precipitation Analysis for Nanliu River Basin in Humid Southwestern China.
Hydrologic Evaluation of TRMM Multisatellite Precipitation Analysis for Nanliu River Basin in Humid Southwestern China.
复制标题
西南湿润地区南流河流域TRMM多卫星降水分析水文评价
DOI：
10.1038/s41598-017-02704-1
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发表时间：
2017-06-01
影响因子：
4.6
通讯作者：
Hu B
中科院分区：
文献类型：
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作者：
Zhao Y;Xie Q;Lu Y;Hu B
对小流域（南流河流域）热带雨量测量任务（TRMM）多卫星降水分析（TMPA）日累积降水产品（3B42RTV7和3B42V7）的准确性进行了评估。我们在时间和空间尺度上与 9 年期间（2000 年至 2009 年）的仪表观测结果进行了直接比较。结果表明，南流河流域降水时空特征与3B42V7相对于3B42RTV7高度一致，除日尺度外，所有时间尺度的相关系数（CC）较高，约为0.9，相对偏差百分比较低。 3B42V7 略微高估了除年尺度之外的所有时间尺度的降水量；它稍微低估了日空间尺度的降水量。结果还表明，TMPA 产品的精度随着时间聚合数据的增加而增加，并且每日 TMPA 降水产品的检测能力通过增加每日降水率而增强。此外，每日TMPA产品被输入新安江水文模型；结果表明，基于3B42V7的模拟输出与实际流量观测结果非常吻合，具有较高的CC（0.90）和Nash-Sutcliffe效率系数（NSE，0.79），并且结果充分捕捉了观测流量曲线的模式。
The accuracy of Tropical Rainfall Measuring Mission (TRMM) multi-satellite precipitation analysis (TMPA) daily accumulated precipitation products (3B42RTV7 and 3B42V7) was evaluated for a small basin (the Nanliu river basin). A direct comparison was performed against gauge observations from a period of 9 years (2000–2009) at temporal and spatial scales. The results show that the temporal-spatial precipitation characteristics of the Nanliu river basin are highly consistent with 3B42V7 relative to 3B42RTV7, with higher correlation coefficient (CC) approximately 0.9 at all temporal scales except for the daily scale and a lower relative bias percentage. 3B42V7 slightly overestimates precipitation at all temporal scales except the yearly scale; it slightly underestimates the precipitation at the daily spatial scale. The results also reveal that the precision of TMPA products increases with longer time-aggregated data, and the detection capability of daily TMPA precipitation products are enhanced by augmentation with daily precipitation rates. In addition, daily TMPA products were input into the Xin’anjiang hydrologic model; the results show that 3B42V7-based simulated outputs were well in line with actual stream flow observations, with a high CC (0.90) and Nash-Sutcliffe efficiency coefficient (NSE, 0.79), and the results adequately captured the pattern of the observed flow curve.