摘要
基于淮河流域164个地面观测站1983~2016年的降水观测资料,对PERSIANN-CDR降水产品的降水反演性能进行评估,并将其应用于淮河流域的干旱评估工作中。通过精度检验,认为PERSIANN-CDR对淮河流域月尺度的面雨量具有良好的估算性能,在时空尺度上均能较好地反演淮河流域降雨的演变规律。采用标准化降水指数,从干旱事件的发生时间、发生次数、发生强度、覆盖面积和空间分布特征等多方面对该卫星降水产品的干旱辨识性能进行了评估,发现卫星数据对干旱事件的识别、干旱强度的估算及干旱时空分布特征的反演结果均较为可靠。但PERSIANN-CDR卫星数据对干旱空间分布特征的辨识能力会随着干旱事件时间尺度的增大而减小,此外,其对淮河流域干旱强度和覆盖面积的评估略偏严峻。
Based on the rainfall observation data of 164 ground stations in the Huaihe River Basin dated from 1983 to2016,the estimated performance of the PERSIANN-CDR precipitation products was evaluated and then applied to the drought assessment of the Huaihe River Basin.The PERSIANN-CDR has a good estimation performance for the monthly rainfall of the Huaihe River Basin,and it can better capture the distribution characteristics of rainfall in the Huaihe River Basin on both spatial and temporal scales.Based on the standard precipitation index,the drought identification performance of the satellite precipitation products was evaluated from the aspects of occurrence time,occurrence frequency,occurrence intensity,coverage area and spatial distribution characteristics of the drought events.It was found that the PERSIANN-CDR is reliable in identifying the drought distribution characteristics both in time and space scale.However,the ability of PERSIANN-CDR satellite data to identify the spatial distribution characteristics of drought will decrease with the increase of the time scale of drought events.In addition,its assessment of drought intensity and coverage area in the Huaihe River Basin is slightly severe.
作者
杨娜
卢莹
杨茜然
于航
王雍恺
YANG Na;LU Ying;YANG Qian-ran;YU Hang;WANG Yong-kai(School of Hydrology and Water Resources,Nanjing University of Information Science&Technology,Nanjing 210044,China)
出处
《水电能源科学》
北大核心
2020年第3期1-4,12,共5页
Water Resources and Power
基金
江苏省高等学校大学生创新创业训练计划项目(201710300045Z)
国家自然科学基金项目(41401612)
江苏省科技项目(2108020)资助。
