干旱区生态环境知识资源中心(Arid): Merging Satellite and Gauge Rainfalls for Flood Forecasting of two Catchments under Different Climate Conditions

Arid

DOI	10.3390/w12030802
	Merging Satellite and Gauge Rainfalls for Flood Forecasting of two Catchments under Different Climate Conditions
	Min, Xinyi 1,2; Yang, Chuanguo 1,2; Dong, Ningpeng 1,2,3
通讯作者	Yang, Chuanguo
来源期刊	WATER
EISSN	2073-4441
出版年	2020
卷号	12 期号:3
英文摘要	As satellite rainfall data has the advantages of wide spatial coverage and high spatial and temporal resolution, it is an important means to solve the problem of flood forecasting in ungauged basins (PUB). In this paper, two catchments under different conditions, Xin'an River Basin and Wuding River Basin, were selected as the representatives of humid and arid regions, respectively, and four kinds of satellite rainfall data of TRMM 3B42RT, TRMM 3B42V7, GPM IMERG Early, and GPM IMERG Late were selected to evaluate the monitoring accuracy of rainfall processes in the two catchments on hourly scale. Then, these satellite rainfall data were respectively integrated with the gauged data. HEC-HMS (The Hydrologic Engineering Center's-Hydrologic Modeling System) model was calibrated and validated to simulate flood events in the two catchments. Then, improvement effect of the rainfall merging on flood forecasting was evaluated. According to the research results, in most cases, the Nash-Sutcliffe efficiency coefficients of the simulated streamflow from initial TRMM (Tropical Rainfall Measuring Mission) and GPM (Global Precipitation Measurement) satellite rainfall data were negative at the two catchments. By merging gauge and TRMM rainfall, the Nash-Sutcliffe efficiency coefficient is mostly around 0.7, and the correlation coefficient is as high as 0.9 for streamflow simulation in the Xin'an River basin. For the streamflow simulated by merging gauge and GPM rainfall in Wuding River basin, the Nash-Sutcliffe efficiency coefficient is about 0.8, and the correlation coefficient is more than 0.9, which indicate good flood forecasting accuracy. Generally, higher performance statistics were obtained in the Xin'an River Basin than the Wuding River Basin. Compared with the streamflow simulated by the initial satellite rainfalls, significant improvement was obtained by the merged rainfall data, which indicates a good prospect for application of satellite rainfall in hydrological forecasting. In the future, it is necessary to further improve the monitoring accuracy of satellite rainfall products and to develop the method of merging multi-source rainfall data, so as to better applications in PUB and other hydrological researches.
英文关键词	satellite rainfall GPM IMERG TRMM 3B42 merging data flood forecasting
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000529249500187
WOS关键词	RIVER-BASIN ; TRMM ; GPM ; PREDICTION
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
来源机构	河海大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318880
作者单位	1.Hohai Univ, Coll Hydrol & Water Resources, Nanjing 210098, Peoples R China; 2.Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Peoples R China; 3.China Inst Water Resources & Hydropower Res, Dept Water Resources, Beijing 100038, Peoples R China
推荐引用方式 GB/T 7714	Min, Xinyi,Yang, Chuanguo,Dong, Ningpeng. Merging Satellite and Gauge Rainfalls for Flood Forecasting of two Catchments under Different Climate Conditions[J]. 河海大学,2020,12(3).
APA	Min, Xinyi,Yang, Chuanguo,&Dong, Ningpeng.(2020).Merging Satellite and Gauge Rainfalls for Flood Forecasting of two Catchments under Different Climate Conditions.WATER,12(3).
MLA	Min, Xinyi,et al."Merging Satellite and Gauge Rainfalls for Flood Forecasting of two Catchments under Different Climate Conditions".WATER 12.3(2020).