水资源与水工程学报2023，Vol.34Issue(6)：61-68,8.DOI:10.11705/j.issn.1672-643X.2023.06.08
缺资料地区多源降水产品适用性评价
Applicability evaluation of multi-source precipitation products in data-deficient areas:Taking Paraná River in Brazil as an example
摘要
Abstract
Multi-source precipitation products represented by satellite remote sensing is a necessary sup-plement to the measured data of meteorological stations,they play an important role in the accurate iden-tification of the precipitation distribution in data-deficient areas.In this research,precipitation products of CFSv2,ERA5 and TPP(constructed by an improved climatic teleconnection model based on model-X knockoffs and random forest)were compared with the measured precipitation of meteorological stations from the spatial and temporal dimensions to evaluate their applicability in the upper Paraná River Basin,Brazil.The determination coefficient(R2),Nash-Sutcliffe efficiency coefficient(NSE)and relative er-ror(RE)were adopted as evaluation indices.The results showed that the fitting accuracy between the predicted value and measured value of the TPP and ERA5 products are higher than that of CFSv2.In the cross periods,the fitted R2 and NSE of the area rainfall expressed as ERA5>TPP>CFSv2,among which,the area rainfall calculated by CFSv2 was larger than that of the measured one,and the fitted RE reached 28.2%;on the contrary,the calculated value of ERA5 was smaller than the measured one,with a fitted RE of-10.3%.The RE between the calculated area rainfall of TPP products and the measured value was the smallest,which was 0.33%.Spatially,the fitted R2 and NSEof the three products with the measured precipitation at the selected typical meteorological stations were ERA5>TPP>CFSv2,while the|RE| expressed as TPP<ERA5<CFSv2.The fitting accuracy of ERA5 and CFSv2 products with the measured precipitation in the highaltitude low rainfall area in the southeast of the basin was higher than that in the low altitude high rainfall area in the northeast.The results can provide some reference for the applicability evaluation of similar precipitation products,and support for runoff prediction and compre-hensive water resources management in Paraná River Basin.关键词
多源降水产品/CFSv2降水产品/ERA5降水产品/气候遥相关模型/适用性评价/缺资料地区/巴拉那河上游流域Key words
multi-source precipitation product/CFSv2/ERA5/climatic teleconnection model/applica-bility evaluation/data-deficient area/upper Paraná River Basin分类
天文与地球科学引用本文复制引用
吕振豫,李梦杰,梁犁丽,刘志武,刘琨..缺资料地区多源降水产品适用性评价[J].水资源与水工程学报,2023,34(6):61-68,8.基金项目
中国长江三峡集团有限公司自主科研项目(WWKY-2021-0081、202103429) （WWKY-2021-0081、202103429）
国家自然科学基金项目(U2040212) （U2040212）
