Hydrological drought assessment and uncertainty analysis for the Upper Yangtze River
HONG Xingjun1,2, GUO Shenglian2
1. Changjiang Institute of Survey, Planning, Design and Research, Wuhan 430010; 2. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072
Abstract:Sampling uncertainty of hydrological variables parameter commonly exists in frequency analysis-based hydrological drought indices calculation due to the limited data length and discontinuousness. Based on the daily streamflow data of the Yichang Gauging Station from 1882 to 2009, the runoff drought index SDI of different time scales was calculated, and the sampling uncertainty of drought index calculation was verified by Monte-Carlo stochastic simulation, analyzing the influence of drought evolution characteristics and uncertainty on drought assessment in the upper reaches of Yangtze River. The results show that when evaluating drought magnitude according to drought index, considering the influence of uncertainty can provide theoretical support for more accurate and effective on drought resistance decision, to avoid the possible lack capacity of disaster reduction or resources waste of drought-resistant.
[1] Panu U S, Sharma T C. Challenges in drought research:some perspectives and future directions[J]. Hydrological Sciences Journal, 2002, 47(S):S19-S30. [2] 张俊, 陈桂亚, 杨文发. 国内外干旱研究进展综述[J]. 人民长江,2011, 42(10):65-69. [3] American Meteorological Society. Meteorological drought-policy statement[J]. Bulletin of American Meteorological Society, 1997(78):847-849. [4] 冯平, 朱元甡. 供水系统水文干旱的识别[J]. 水利学报, 1997,28(11):71-76. [5] Shukla S, Wood A W. Use of a standardized runoff index for characterizing hydrologic drought[J]. Geophysical Research Letters, 2008, 35(2):226-236. [6] Nalbantis I, Tsakiris G. Assessment of hydrological drought revisited[J]. Water Resources Management, 2009, 23(5):881-897. [7] Bloomfield J P,Marchant B P. Analysis of groundwater drought building on the standardised precipitation index approach[J]. Hydrology and Earth System Sciences, 2013(17):4769-4787. [8] Mckee T B, Doesken N J, Kliest J. The relationship of drought frequency and duration to time scales[C]//Proceeding of the 8th Conference on Applied Climatology.Boston:American Meteorological Society, 1993:179-182. [9] Wu H, Hayes M J, Wilhite D A, et al. The effect of the length of record on the Standardized Precipitation Index calculation[J].International Journal of Climatology, 2005(25):505-520. [10] Hong X, Guo S, Zhou Y, et al. Uncertainties in assessing hydrological drought using streamflow drought index for the upper Yangtze River basin[J].Stochastic Environmental Research and Risk Assessment, 2015, 29(4):1235-1247. [11] Cancelliere A,Bonaccorso B.Uncertainty analysis of the Standardized Precipitation Index in the presence of trend[C]//29th AnnualAmericanGeophysicalUnionHydrologyDays.[s.n.], 2009:14-26. [12] Angelidis P, Maris F, Kotsovinos N, et al. Computation of drought index SPI with alternative distribution functions[J]. Water Resources Management, 2012(26):2453-2473. [13] 洪兴骏, 郭生练, 周研来. 标准化降水指数SPI分布函数的适用性研究[J]. 水资源研究, 2013, 2(1):33-41. [14] 洪兴骏, 郭生练, 王乐, 等. 基于最大熵原理的水文干旱指标计算方法研究[J]. 南水北调与水利科技, 2018, 16(2):95-101. [15] 朱建荣, 吴辉, 李路, 等. 2006极端干旱水文年中长江河口的盐水入侵[J]. 华东师范大学学报(自然科学版), 2010(4):1-6, 25. [16] Yevjevich V. An Objective Approach to Definitions and Investigations of Continental Hydrologic Droughts[M].Fort Collins:Colorado State University, 1967.