Regional Frequency Analysis of Extreme Dry Spells during Rainy Season in the Wei River Basin, China

She, Dunxian; Xia, Jun; Zhang, Yan Jun; Shan, Lijie

doi:10.1155/2016/6427568

Cited by 13 publications

(4 citation statements)

References 45 publications

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“…Regional frequency analysis (RFA) can get over the limitations of statistical estimation, such as the absence of lengthy or too short records, and result in more accurate quantile estimates compared to at-site analysis. Therefore, RFA has attracted increasing attention from researchers [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Application of L-moment method for regional frequency analysis of meteorological drought across the Loess Plateau, China

Liu

Cao

et al. 2022

PLoS ONE

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Water shortages have always been the primary bottleneck for the healthy and sustainable development of the ecological environment on the Loess Plateau (LP). Proper water resource management requires knowledge of the spatiotemporal characteristics of precipitation frequency. This paper employed the gridded precipitation dataset obtained from the China Meteorological Data Service Centre to present a spatially explicit characterization of precipitation frequencies in tandem with their return periods on the LP based on the L-moment method. The 60% and 80% of the mean annual precipitation from 1981 to 2010 were synonymous with severe and moderate droughts, respectively. Droughts occurred more frequently in the northwest than in the southeast of the LP. Moreover, the frequencies of moderate drought showed a slight difference throughout the area, while those of severe droughts demonstrated considerable differences between the northwestern arid zone and the southeastern semi-humid zone. The maps associated with various return periods of precipitation deficits can be used to produce drought risk maps together with drought vulnerability maps. These findings could also provide useful information for drought management, water resource management and the development of food security policies.

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Section: Introductionmentioning

confidence: 99%

Application of L-moment method for regional frequency analysis of meteorological drought across the Loess Plateau, China

Liu

Cao

et al. 2022

PLoS ONE

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“…[4] and [5]. It has been demonstrated in a number of publications that the methodology may be used for creeks as well as entre river basins [6][7].…”

Section: Assessed Flow Characteristicsmentioning

confidence: 99%

Long-term natural flow regime (spells) analysis for water treatment discharges

Makarynskyy¹,

Makarynska²

2019

UHJ

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Conducting mineral extraction activities usually requires obtaining a set of permits for each of the activities planned to be undertaken. This directly concerns water management and discharges associated with any mineral extraction operations. In response to the growing demand for energy resources worldwide, the industry demand for permits relating to the extraction of coal seam (and shale) gas also increased dramatically. This was in turn accompanied by the growing community concerns in regard to fracking and wastewater management practices. To address these concerns, the state governments in Australia developed a strict framework and guidelines for the permit application process and provided terms of reference for the environmental impact assessments, where required. In accord with the guidelines, a liquefied natural gas mining operator was conducting a research to assess several facets of water releases from Reedy Creek Water Treatment Facility to Yuleba Creek in Queensland. The scope for the research was developed in line with such guidelines and included estimating the downstream extents of flows from several Water Treatment Facility discharge volumes over a period of planned discharges. More specifically, the purpose of the study presented in this paper was to assess flows in Yuleba Creek before and after the proposed releases of treated water from the Reedy Creek Water Treatment Facility, and how the planned change to flow parameters would satisfy the regulatory guidelines. The assessment was based on 41 years of data collected at the Forestry Station gauge. An analysis of the obtained results suggested that the historical maximum was 25,825 ML/d. An analysis of the median flows suggested that the years 1983, 1999, and 2010-2012 had the highest medians of around 15 ML/d, 10 ML/d, and from 9 ML/d to 12 ML/d respectively. The median flow values would exceed from 0.09 ML/d to 0.69 ML/d flows during the months of February and March only. The lowest 90th percentile flows were obtained for the months from April through to October. The highest flow estimates would be in the months from November through to March. An analysis of the flow duration curves suggested that the annually averaged flow of 0.08 ML/d in the Yuleba Creek would be present for around 48% of the time. Flows predictabilities were calculated; for the baseline flow records, the value of predictability was 0.50, and the constancy/predictability ratio was 0.89. The rates of streamflow rise and fall were estimated and analysed. The results suggested that the rate of streamflow rise varied within a range from 0.0 up to 320.0 ML/d per day. The rates of streamflow fall was up to 15.0 ML/d per day.

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“…The discordance test is useful for determining in advance whether the stations in a divided region are conspicuously discordant with the entire group (She et al 2016b). Hosking and Wallis (1993) give the definition of discordancy of sites on the basis of L-moments, and Chebana and Ouarda (2007) extended it to the multivariate case.…”

Section: Discordance Testmentioning

confidence: 99%

“…From table 5, we can find that two or more candidate distributions (|Z DIST | ≤ 1.64) could fit the SSI series in each season very well, but the best fit distribution is the one with the smallest |Z DIST |, and will ultimately be adopted. Therefore, such procedure indicates that it is a very important step to undertake thorough distribution selection processes rather than only subjectively fit one single distribution for all SSI series so as to reduce the uncertainty originated from the choice of the 'best-fit' distribution for the considered SSI series (She et al 2016b).…”

Section: Choice Of Optimal Regional Frequency Distributionmentioning

confidence: 99%

Joint pattern of seasonal hydrological droughts and floods alternation in China’s Huai River Basin using the multivariate L-moments

Zhang

She

2017

J Earth Syst Sci

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Under the current condition of climate change, droughts and floods occur more frequently, and events in which flooding occurs after a prolonged drought or a drought occurs after an extreme flood may have a more severe impact on natural systems and human lives. This challenges the traditional approach wherein droughts and floods are considered separately, which may largely underestimate the risk of the disasters. In our study, the sudden alternation of droughts and flood events (ADFEs) between adjacent seasons is studied using the multivariate L-moments theory and the bivariate copula functions in the Huai River Basin (HRB) of China with monthly streamflow data at 32 hydrological stations from 1956 to 2012. The dry and wet conditions are characterized by the standardized streamflow index (SSI) at a 3-month time scale. The results show that: (1) The summer streamflow makes the largest contribution to the annual streamflow, followed by the autumn streamflow and spring streamflow. (2) The entire study area can be divided into five homogeneous sub-regions using the multivariate regional homogeneity test. The generalized logistic distribution (GLO) and log-normal distribution (LN3) are acceptable to be the optimal marginal distributions under most conditions, and the Frank copula is more appropriate for spring-summer and summer-autumn SSI series. Continuous flood events dominate at most sites both in spring-summer and summer-autumn (with an average frequency of 13.78% and 17.06%, respectively), while continuous drought events come second (with an average frequency of 11.27% and 13.79%, respectively). Moreover, seasonal ADFEs most probably occurred near the mainstream of HRB, and drought and flood events are more likely to occur in summer-autumn than in spring-summer.

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Regional Frequency Analysis of Extreme Dry Spells during Rainy Season in the Wei River Basin, China

Cited by 13 publications

References 45 publications

Application of L-moment method for regional frequency analysis of meteorological drought across the Loess Plateau, China

Application of L-moment method for regional frequency analysis of meteorological drought across the Loess Plateau, China

Long-term natural flow regime (spells) analysis for water treatment discharges

Joint pattern of seasonal hydrological droughts and floods alternation in China’s Huai River Basin using the multivariate L-moments

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