期刊
EUROPEAN JOURNAL OF REMOTE SENSING
卷 54, 期 -, 页码 372-382出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/22797254.2020.1819169
关键词
Runoff simulation; small watershed; satellite precipitation dataset; hydrological model
资金
- Special Project of First-Class University in western China for the Construction of State Key Laboratory of Ningxia University [GZXM2017001]
- National Key RD Project [2018YFC0408104]
- Scientific Research Project of Ningxia Colleges and Universities, China [NGY2020006]
- University First-class Discipline Construction Project of Ningxia, China [NXYLXK2017A03]
- Priority Research and Development Projects for Ningxia [2020BEG03021]
This study evaluated the accuracy of precipitation products in runoff simulation in small watersheds in the United States, finding that different datasets have varying levels of matching in different regions. In the runoff simulation effectiveness evaluation, NOAA-CPC-US and StageIV performed well, while TRMM-3B42V7 is not suitable for runoff simulation in small watersheds.
Small watersheds are ideal objects for studying the evolution of hydrological and water resources at small scales. Whether precipitation products can meet the runoff simulation of small watersheds is the main purpose of this study. With NOAA-CPC-US precipitation as a reference, in nine small watersheds of the United States, accuracy of the precipitation products such as PERSIANN, PERSIANN-CDR, TRMM-3B42V7, GPM-IMERG, StageIV, and ERA5 is analyzed. By driving the CREST hydrological model using these datasets, the runoff simulation effects were evaluated. Result shows the precipitation products match the NOAA-CPC-US from high to low in the order of StageIV, PERSIANN-CDR, GPM-IMERG, PERSIANN, ERA5, and finally TRMM-3B42 V7. These datasets have relatively low accuracy in the northern high latitude area and the western mountains, while accuracy is better in the central, southern, and eastern parts of the United States. In the runoff simulation effectiveness evaluation, the daily runoff of watersheds is simulated during the same verification period. The results show that: NOAA-CPC-US and StageIV have good simulation effect in small watersheds. In the northern and western United States, the PERSIANN, PERSIANN-CDR, GPM-IMERG, and ERA5 for runoff simulation should be used with caution. TRMM-3B42V7 is not suitable for runoff simulation in small watershed.
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