کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4576522 1629975 2012 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Regionalization and spatial changing properties of droughts across the Pearl River basin, China
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Regionalization and spatial changing properties of droughts across the Pearl River basin, China
چکیده انگلیسی

SummaryIn frequency analysis for droughts, the absence of lengthy records usually limits the reliability of statistical estimates. To overcome this limitation, a “regional” analysis approach is often used. Hydrological events typically have multivariate characteristics; therefore it is logical to jointly consider these characteristics when carrying out a multivariate regional frequency analysis for these events. This study presents a method for regional frequency analysis in the Pearl River basin using the multivariate L-moments homogeneity test. Results indicate that the Pearl River basin can be categorized into five homogeneous regions in terms of drought variation, and the Plackett copula fits well for all of the homogeneous regions. The frequency analysis of all sites in each homogeneous region shows that the Pearl River Delta is characterized by a high drought risk, while a relatively lower drought risk in the west and northeast parts of the Pearl River basin. Results of this study will be useful for basin-scale water resources management across the Pearl River basin.


► Multivariate regional frequency analysis is used in evaluation of drought risk in the Pearl River basin.
► Joint probability behaviors of droughts are investigated using copula functions.
► Copula-based drought risk is statistically evaluated over the Pearl River basin, China.
► A case study is provided for copula-based drought risk evaluation in humid regions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volumes 472–473, 23 November 2012, Pages 355–366
نویسندگان
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