摘要
基于锡林河上游流域水文站的实测逐月径流量序列资料,以纳什效率系数(E_(ns))、决定系数(R^(2))作为评价指标验证APEX模型在水文模拟方面的适用性,分析SEBAL模型、MOD16A2数据的蒸散发结果并利用APEX模型中Penman-Monteith公式验证精度,对比APEX模型、SEBAL模型与MOD16A2数据同时期的月均蒸散发。结果表明,实测径流与APEX模型模拟径流的率定期E_(ns)=0.63、R^(2)=0.66,验证期E_(ns)=0.62、R^(2)=0.66;SEBAL模型与APEX模型中Penman-Monteith公式日蒸散发计算结果的E_(ns)=0.68、R^(2)=0.80,月蒸散发结果的E_(ns)=0.71、R^(2)=0.85,MOD16A2数据与Penman-Monteith公式计算的每月蒸散发结果E_(ns)=0.58、R^(2)=0.78;同时期流域尺度上MOD16A2数据的月均蒸散发最大。研究结果可为草原流域的蒸散发估算提供支撑。
Based on the measured monthly runoff sequence data of hydrological stations in the Xilin River basin,the Nash efficiency coefficient(E_(ns))and determination coefficient(R^(2))were used as evaluation indexes to verify the applicability of APEX model in hydrological simulation.The evaporation results of the SEBAL model and the MOD16A2 data were analyzed,and the accuracy was verified by using the Penman-Monteith formula in the APEX model.The monthly average evapotranspiration of APEX model was compared with the SEBAL model and MOD16A2.The results show that for the measured runoff and simulation by the APEX model,E_(ns)=0.63 and R^(2)=0.66 in calibration period while in verification period,E_(ns)=0.62,R^(2)=0.66;For the daily evapotranspiration calculation results by the Penman-Monteith formula in the SEBAL model and the APEX model,E_(ns)=0.68,R^(2)=0.80 while E_(ns)=0.71,R^(2)=0.85 for monthly evapotranspiration results;For the monthly evaporation results by MOD16A2 data and the Penman-Monteith formula,E_(ns)=0.58,R^(2)=0.78;The average monthly evapotranspiration of MOD16A2 data at the watershed scale in the same period is maximum.The results can provide support for evapotranspiration estimation in grassland basins.
作者
龚旭楠
张成福
贺帅
苗林
冯霜
GONG Xu-nan;ZHANG Cheng-fu;HE Shuai;MIAO Lin;FENG Shuang(School of Desert Management,Inner Mongolia Agricultural University,Hohhot 010018,China)
出处
《水电能源科学》
北大核心
2024年第6期28-32,87,共6页
Water Resources and Power
基金
内蒙古自治区科技重大专项(RZ2000000704)。
关键词
蒸散发
遥感
水文模型
草原流域
evapotranspiration
remote sensing
hydrological model
grassland basin
