Evaluation of Satellite Precipitation Products for Estimation of Floods in Data-Scarce Environment

IF 2.1 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES Advances in Meteorology Pub Date : 2023-05-03 DOI:10.1155/2023/1685720
M. Masood, Muhammad Naveed, M. Iqbal, G. Nabi, H. Kashif, Muhammad Jawad, Ahmad Mujtaba
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Abstract

Utilization of satellite precipitation products (SPPs) for reliable flood modeling has become a necessity due to the scarcity of conventional gauging systems. Three high-resolution SPPs, i.e., Integrated Multi-satellite Retrieval for GPM (IMERG), Global Satellite Mapping of Precipitation (GSMaP), and Climate Hazards Group InfraRed Precipitation with Station (CHIRPS), data were assessed statistically and hydrologically in the sparsely gauged Chenab River basin of Pakistan. The consistency of rain gauge data was assessed by the double mass curve (DMC). The statistical metrics applied were probability of detection (POD), critical success index (CSI), false alarm ratio (FAR), correlation coefficient (CC), root mean square error (RMSE), and bias (B). The hydrologic evaluation was conducted with calibration and validation scenarios for the monsoon flooding season using the Integrated Flood Analysis System (IFAS) and flow duration curve (FDC). Sensitivity analysis was conducted using ±20% calibrating parameters. The rain gauge data have been found to be consistent with the higher coefficient of determination (R2). The mean skill scores of GSMaP were superior to those of CHIRPS and IMERG. More bias was observed during the monsoon than during western disturbances. The most sensitive parameter was the base flow coefficient (AGD), with a high mean absolute sensitivity index value. During model calibration, good values of performance indicators, i.e., R2, Nash−Sutcliffe efficiency (NSE), and percentage bias (PBIAS), were found for the used SPPs. For validation, GSMaP performed better with comparatively higher values of R2 and NSE and a lower value of PBIAS. The FDC exhibited SPPs’ excellent performance during 20% to 40% exceedance time.
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数据匮乏环境下洪水估算的卫星降水产品评价
由于缺乏传统的测量系统,利用卫星降水产品进行可靠的洪水建模已成为必要。三个高分辨率SPP,即GPM的综合多卫星检索(IMERG)、全球卫星降水量图(GSMaP)和气候危害组红外站点降水量(CHIRPS),在巴基斯坦稀少的Chenab河流域对数据进行了统计和水文评估。通过双质量曲线(DMC)评估雨量计数据的一致性。应用的统计指标包括检测概率(POD)、关键成功指数(CSI)、虚警率(FAR)、相关系数(CC)、均方根误差(RMSE)和偏差(B)。水文评估采用综合洪水分析系统(IFAS)和流量-持续时间曲线(FDC),采用季风汛期的校准和验证方案进行。使用±20%的校准参数进行灵敏度分析。雨量计数据已被发现与较高的决定系数(R2)一致。GSMaP的平均技能得分优于CHIRPS和IMERG。季风期间观察到的偏差比西部扰动期间更多。最敏感的参数是基本流量系数(AGD),具有较高的平均绝对敏感指数值。在模型校准过程中,发现所用SPP的性能指标值良好,即R2、Nash−Sutcliffe效率(NSE)和百分比偏差(PBIAS)。对于验证,GSMaP表现更好,R2和NSE值相对较高,PBIAS值较低。FDC在20%至40%的超越时间内表现出SPP的优异性能。
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来源期刊
Advances in Meteorology
Advances in Meteorology 地学天文-气象与大气科学
CiteScore
5.30
自引率
3.40%
发文量
80
审稿时长
>12 weeks
期刊介绍: Advances in Meteorology is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles in all areas of meteorology and climatology. Topics covered include, but are not limited to, forecasting techniques and applications, meteorological modeling, data analysis, atmospheric chemistry and physics, climate change, satellite meteorology, marine meteorology, and forest meteorology.
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