气候变化领域集成服务门户(CCPortal): Impact of downscaled rainfall biases on projected runoff changes

CCPortal

DOI	10.5194/hess-24-2981-2020
	Impact of downscaled rainfall biases on projected runoff changes
	Charles S.P.; Chiew F.H.S.; Potter N.J.; Zheng H.; Fu G.; Zhang L.
发表日期	2020
ISSN	1027-5606
起始页码	2981
结束页码	2997
卷号	24 期号:6
英文摘要	Realistic projections of changes to daily rainfall frequency and magnitude, at catchment scales, are required to assess the potential impacts of climate change on regional water supply. We show that quantile-quantile mapping (QQM) bias-corrected daily rainfall from dynamically downscaled WRF simulations of current climate produce biased hydrological simulations, in a case study for the state of Victoria, Australia (237 629 km2). While the QQM bias correction can remove bias in daily rainfall distributions at each 10 km × 10 km grid point across Victoria, the GR4J rainfall-runoff model underestimates runoff when driven with QQM bias-corrected daily rainfall. We compare simulated runoff differences using bias-corrected and empirically scaled rainfall for several key water supply catchments across Victoria and discuss the implications for confidence in the magnitude of projected changes for mid-century. Our results highlight the imperative for methods that can correct for temporal and spatial biases in dynamically downscaled daily rainfall if they are to be suitable for hydrological projection. © Author(s) 2020.
语种	英语
scopus关键词	Catchments; Climate change; Runoff; Water supply; Bias correction; Catchment scale; Hydrological simulations; Potential impacts; Rainfall-runoff modeling; Runoff changes; Temporal and spatial; Victoria , Australia; Rain; catchment; climate change; rainfall; rainfall-runoff modeling; runoff; water supply; Australia; Victoria [Australia]
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159380
作者单位	Charles, S.P., CSIRO Land and Water, Floreat, WA 6148, Australia; Chiew, F.H.S., CSIRO Land and Water, Canberra, ACT 2601, Australia; Potter, N.J., CSIRO Land and Water, Canberra, ACT 2601, Australia; Zheng, H., CSIRO Land and Water, Canberra, ACT 2601, Australia; Fu, G., CSIRO Land and Water, Floreat, WA 6148, Australia; Zhang, L., CSIRO Land and Water, Canberra, ACT 2601, Australia
推荐引用方式 GB/T 7714	Charles S.P.,Chiew F.H.S.,Potter N.J.,et al. Impact of downscaled rainfall biases on projected runoff changes[J],2020,24(6).
APA	Charles S.P.,Chiew F.H.S.,Potter N.J.,Zheng H.,Fu G.,&Zhang L..(2020).Impact of downscaled rainfall biases on projected runoff changes.Hydrology and Earth System Sciences,24(6).
MLA	Charles S.P.,et al."Impact of downscaled rainfall biases on projected runoff changes".Hydrology and Earth System Sciences 24.6(2020).