Page 312 - 《高原气象》2026年第2期

高 原 气 象 45 卷
612

The Applicability of Gridded Products for Streamflow

Simulation in the Taolai River Basin

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KANG Dekui ， LIU Kaiqing ， SI Jianhua ， MA Baolong ， JIA Bing ，
ZHU Haiyang ， LIU Yongbao ， WANG Chunlin 3
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（1. Water Resources Utilization Center of Taolai River Basin， Gansu Provincial Water Resources
Department， Jiuquan 735000， Gansu， China；
2. Northwest Institute of Eco-Environment and Resources， Chinese Academy of Sciences， Lanzhou 730000， Gansu， China；
3. Department of Geography， Xinzhou Normal University， Xinzhou 034000， Shanxi， China）
Abstract： Gridded precipitation， potential evapotranspiration （PET）， and land surface temperature （LST） data‐
sets provide valuable alternatives for hydrologic modeling in ungauged areas. However， their performance in spe‐
cific regions requires further investigation. This study evaluates six gridded precipitation products （CHIRPS，
CMORPH， GPM， GSMaP， MSWEP， and PERSIANN）， three PET products （GLDAS， GLEAM， and ERA5-
Land）， and one LST product （MOD11A1） in the Taolai River Basin. The effects of different precipitation and
PET inputs on actual evapotranspiration （AET） and soil moisture were also analyzed. The results indicate that
runoff simulations vary significantly depending on the precipitation product used. GPM and MSWEP perform
best， achieving Nash-Sutcliffe efficiency （NSE） values of 0. 58 and 0. 54， respectively， during the validation
period. These two products are reliable alternatives for precipitation sources in data-scarce scenarios. In contrast，
the selection of PET products exhibits limited impact on runoff simulations， with the NSE values ranging from
0. 61 to 0. 74. If runoff simulation accuracy is the primary concern， the GLDAS， GLEAM， and ERA5-Land
products are suitable substitutes. Additionally， when surface temperature data are unavailable， the MOD11A1
product achieves an NSE of 0. 61 during the validation period. For scenarios with no meteorological observa‐
tions， combining GPM or MSWEP precipitation data with any of the three PET products and MOD11A1 yields
NSE values exceeding 0. 53 in both calibration and validation periods. This study confirms that gridded datasets
can partially mitigate hydrological simulation challenges in data-scarce regions， while recommending expanded
applicability assessments across more basins to enhance reliability.
Key words： HBV hydrologic model； Taolai River Basin； precipitation products； potential evapotranspiration
products