摘要
采用地面雨量站观测的降水量为基准数据,以寒区呼兰河流域作为典型研究区,评估了TRMM(Tropical rainfall measuring mission)最新一代卫星降水量产品3B42V7、3B42RT以及CHIRPS(Climate hazards group infrared precipitation with station data)、基于地面降水量插值获得的IDWP降水量数据在日、月、季度和空间尺度上的精度。利用站点和卫星2种降水量数据驱动SWAT模型,采用SUFI-2算法计算模型并考虑模型参数的敏感性,进行日流量过程模拟,评估了多卫星降水量产品在流域水文模拟和预报中的应用能力。研究结果表明:流域日平均尺度上,3B42V7、3B42RT、CHIRPS分别高估地面降水量5.43%、41.24%、3.37%。3B42V7在流域日、月、季度时间尺度上很接近地面观测降水量。3B42RT的日降水强度累计概率分布与雨量站较为接近。3B42V7和CHIRPS在率定期和验证期的日流量模拟效果均较好,NSCE率定期为0.77、0.84;验证期为0.67、0.56。3B42RT对流量峰值的模拟较差。可考虑采用TRMM 3B42V7和CHIRPS作为基础降水量资料应用于寒区水资源管理、干旱监测和洪水预报等相关研究。
The observed data of surficial precipitation stations were used as benchmark data,the Hulan River Basin of the alpine region was used as typical study area,the precision of the new generation satellite rainfall products TRMM（ the tropical rainfall measuring mission） 3 B42 V7,3 B42 RT and CHIRPS（ Climate hazards group infrared precipitation with station data）,IDWP precipitation data based on IDW（ inverse distance weighted） were evaluated in day,month,quarter and spatial scales. The precipitation stations and satellite data were used to drive SWAT model,the SUFI-2 algorithm was used to calculate the model and sensitivity of parameters,simulate the daily flow process,and evaluate the application ability of multi satellite precipitation in watershed hydrological simulation and prediction. The research results showed that in the average watershed scale,the amount of 3 B42 V7,3 B42 RT and CHIP over ground rainfall were 5. 43%,41. 24% and 3. 37%,3 B42 V7 was very close to the ground precipitation in monthly,quarterly time scales. The cumulative probability distribution of daily precipitation intensity of3 B42 RT was close to the surficial precipitation. The simulated results of 3 B42 V7 and CHIP were both very well in the rate of calibrated and validated period of the daily flow simulation results,NSCE was0. 77 and 0. 84 in calibrated period,in the verification period it was 0. 67 and 0. 56,respectively.3 B42 RT for the peak simulation of the flow was poor. The change of water quantity of CHIP was close to that of rainfall station,and the groundwater quantity of 3 B42 RT into the river was smaller than that of others,but the runoff depth and soil water content were larger. TRMM 3 B42 V7 and CHIRPS can be used as a basic application of precipitation data in cold regions for water resources management,drought monitoring and flood forecast research in ungauged and data-deficiency region. The next step would be to study the correction method of satellite precipitation data for cold region which would provide more reliable data for the future application of satellite precipitation data to carry out related research in the cold region.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2017年第11期289-299,共11页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家重点研发计划项目(2016YFC0400101)
国家自然科学基金项目(51009026)
农业部农业水资源高效利用重点实验室开放课题项目(2015002)
关键词
寒区
遥感降水量产品
SWAT模型
时间尺度
空间尺度
cold region
remote sensing precipitation products
SWAT model
temporal scale
spatial scale
