干旱区生态环境知识资源中心(Arid): Estimating Errors in Sizing LID Device and Overflow Prediction Using the Intensity-Duration-Frequency Method

Arid

DOI	10.3390/w11091853
	Estimating Errors in Sizing LID Device and Overflow Prediction Using the Intensity-Duration-Frequency Method
	Tang, Shuangcheng; Xu, Qing; Jia, Zhonghua; Luo, Wan; Shao, Zhengxiao
通讯作者	Jia, Zhonghua
来源期刊	WATER
EISSN	2073-4441
出版年	2019
卷号	11 期号:9
英文摘要	Low impact development (LID) devices or green infrastructures have been advocated for urban stormwater management worldwide. Currently, the design and evaluation of LID devices adopt the Intensity-Duration-Frequency (IDF) method, which employs the average rainfall intensity. However, due to variations of rainfall intensity during a storm event, using average rainfall intensity may generate certain errors when designing a LID device. This paper presents an analytical study to calculate the magnitude of such errors with respect to LID device design and associated device performance evaluation. The normal distribution rainfall (NDR) with different standard deviations was employed to represent realistic rainfall processes. Compared with NDR method, the error in sizing the LID device was determined using the IDF method. Moreover, the overflow difference calculated using the IDF method was evaluated. We employed a programmed hydrological model to simulate different design scenarios. Using storm data from 31 regions with different climatic conditions in continental China, the results showed that different rainfall distributions (as represented by standard deviations (sigma) of 5, 3, and 2) have little influence on the design depth of LID devices in most regions. The relative difference in design depth using IDF method was less than 1.00% in humid areas, -0.61% to 3.97% in semi-humid areas, and the significant error was 46.13% in arid areas. The maximum absolute difference in design depth resulting from the IDF method was 2.8 cm. For a LID device designed for storms with a 2-year recurrence interval, when meeting for the 5-year storm, the relative differences in calculated overflow volume using IDF method ranged from 19.8% to 95.3%, while those for the 20-year storm ranged from 7.4% to 40.5%. The average relative difference of the estimated overflow volume was 29.9% under a 5-year storm, and 12.0% under a 20-year storm. The relative difference in calculated overflow volumes using IDF method showed a decreasing tendency from northwest to southeast. Findings from this study suggest that the existing IDF method is adequate for use in sizing LID devices when the design storm is not usually very intense. However, accurate rainfall process data are required to estimate the overflow volume under large storms.
英文关键词	LID rainfall distribution design depth overflow volume hydrological model
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000488834400116
WOS关键词	STORMWATER RUNOFF ; DESIGN ; MANAGEMENT ; MODEL ; PERFORMANCE ; CALIBRATION ; CHALLENGES ; RAINFALL ; BMP
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/219254
作者单位	Yangzhou Univ, Sch Hydraul Energy & Power Engn, Yangzhou 225009, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Tang, Shuangcheng,Xu, Qing,Jia, Zhonghua,et al. Estimating Errors in Sizing LID Device and Overflow Prediction Using the Intensity-Duration-Frequency Method[J],2019,11(9).
APA	Tang, Shuangcheng,Xu, Qing,Jia, Zhonghua,Luo, Wan,&Shao, Zhengxiao.(2019).Estimating Errors in Sizing LID Device and Overflow Prediction Using the Intensity-Duration-Frequency Method.WATER,11(9).
MLA	Tang, Shuangcheng,et al."Estimating Errors in Sizing LID Device and Overflow Prediction Using the Intensity-Duration-Frequency Method".WATER 11.9(2019).