globalchange  > 气候变化与战略
DOI: 10.5194/hess-22-5175-2018
论文题名:
Design water demand of irrigation for a large region using a high-dimensional Gaussian copula
作者: Tu X.; Du Y.; Singh V.P.; Chen X.; Lin K.; Wu H.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2018
卷: 22, 期:10
起始页码: 5175
结束页码: 5189
语种: 英语
Scopus关键词: Irrigation ; Design procedure ; Frequency distributions ; Gaussian copula ; Guangdong Province ; High-dimensional ; Joint distributions ; Univariate distributions ; Weight functions ; Design
英文摘要: Spatial and frequency distributions of precipitation should be considered in determining design water demand of irrigation for a large region. In Guangdong Province, South China, as a study case, an eight-dimensional joint distribution of precipitation for agricultural sub-regions was developed. A design procedure for water demand of irrigation for a given frequency of precipitation of the entire region was proposed. Water demands of irrigation in the entire region and its sub-regions using three design methods, i.e., equalized frequency (EF), typical year (TY) and most-likely weight function (MLW), were compared. Results demonstrated that the Gaussian copula efficiently fitted the high-dimensional joint distribution of eight sub-regional precipitation values. The Kendall frequency was better than the conventional joint frequency to analyze the linkage between the frequency of precipitation of the entire region and individual sub-regions. For given frequencies of precipitation of the entire region, design water demands of irrigation of the entire region among the MLW, EF and TY methods slightly differed, but those of individual sub-regions of the MLW and TY methods fluctuated around the demand lines of the EF method. The alterations of design water demand in sub-regions were more complicated than those in the entire region. The design procedure using the MLW method in association with a high-dimensional copula, which simulated individual univariate distributions, captured their dependences for multi-variables, and built a linkage between regional frequency and sub-regional frequency of precipitation, is recommended for design water demand of irrigation for a large region. © Author(s) 2018.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163177
Appears in Collections:气候变化与战略

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作者单位: Tu, X., Center of Water Resources and Environment, Sun Yat-sen University, Guangzhou, 510275, China, Center of Water Security Engineering and Technology in Southern China of Guangdong, Guangzhou, 510275, China; Du, Y., Center of Water Resources and Environment, Sun Yat-sen University, Guangzhou, 510275, China; Singh, V.P., Department of Biological and Agricultural Engineering, Texas AandM University, 2117 College StationTX 77843, United States, Zachry Department of Civil Engineering, Texas AandM University, 2117 College StationTX 77843, United States; Chen, X., Center of Water Resources and Environment, Sun Yat-sen University, Guangzhou, 510275, China, Center of Water Security Engineering and Technology in Southern China of Guangdong, Guangzhou, 510275, China; Lin, K., Center of Water Resources and Environment, Sun Yat-sen University, Guangzhou, 510275, China; Wu, H., Center of Water Resources and Environment, Sun Yat-sen University, Guangzhou, 510275, China

Recommended Citation:
Tu X.,Du Y.,Singh V.P.,et al. Design water demand of irrigation for a large region using a high-dimensional Gaussian copula[J]. Hydrology and Earth System Sciences,2018-01-01,22(10)
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