Stochastic analyses of maximum daily rainfall series recorded at two stations across the Mediterranean Sea

Haktanır, Tefaruk; Bajabaa, Saleh; Masoud, Milad

doi:10.1007/s12517-012-0652-0

Cited by 20 publications

(16 citation statements)

References 30 publications

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“…In the Mediterranean region, it is unlikely that rainstorm lasts more than 24 hours [6]. So, the annual maximum daily rainfall (AMDR) series may be introduced to study the distribution of extreme precipitation occurrences within a year.…”

Section: Study Areamentioning

confidence: 99%

“…The Mediterranean environments, typical of semiarid regions that enjoy a rather pleasant climate with sunshine and its fine weather, can suffer hazardous situations since several regions are regularly struck by severe rainstorms. Such events are highly variable in the time and space [5] and often lasted less than one day [6]. Therefore, the critical parameter of these rainstorms is the maximum daily rainfall rather than the total rainfall.…”

Section: Introductionmentioning

confidence: 99%

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Variability and Trend of Annual Maximum Daily Rainfall in Northern Algeria

Ghenim

Megnounif

2016

International Journal of Geophysics

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The daily rainfall dataset of 35 weather stations covering the north of Algeria was studied for a period up to 43 years, recorded after 1970s. The variability and trends in annual maximum daily rainfall (AMDR) time series and their contributions in annual rainfall (AR) were investigated. The analysis of the series was based on statistical characteristics, Burn’s seasonality procedure, Mann-Kendall test, and linear regression technique. The contribution of the AMDR to AR analysis was subjected to both the Buishand test and the double mass curve technique. The AMDR characteristics reveal a strong temporal irregularity and have a wide frequency of occurrence in the months of November and December while the maximum intensity occurred in October. The observed phenomenon was so irregular that there was no dominant season and the occurrence of extreme event can arrive at any time of the year. The AMDR trends showed that only six of 35 stations have significant trend. For other stations, no clear trend was highlighted. This result was confirmed by the linear regression procedure. On the contrary, the contribution of AMDR in annual totals exhibited a significant increasing trend for 57% of the sites studied with a growth rate of up to 50%.

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Section: Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Variability and Trend of Annual Maximum Daily Rainfall in Northern Algeria

Ghenim

Megnounif

2016

International Journal of Geophysics

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“…Thus, Hirsch et al (1982Hirsch et al ( , 1991, Cailas et al (1986), Hipel et al (1988), Zetterqvist (1991), Douglas et al (2000), Yue et al (2002a, b), Lee and Lee (2003), Yue and Pilon (2004), Kahya and Kalayci (2004), Zhang et al (2006), Haktanir et al (2012) or Sen (2013), among others, have used it to assess the significance of linear trends in meteorological and hydrological data time series.…”

Section: Trend Detectionmentioning

confidence: 99%

Assessment of hydrochemical trends in the highly anthropised Guadalhorce River basin (southern Spain) in terms of compliance with the European groundwater directive for 2015

Urresti-Estala

Jiménez-Gavilán

Pérez

et al. 2016

Environ Sci Pollut Res

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One of the key aspects introduced by the European Water Framework Directive 2000/60/EC (WFD) and developed by Groundwater Directive 2006/118/EC was the need to analyse pollution trends in groundwater bodies in order to meet the environmental objectives set in Article 4 WFD. According to this Directive, the main goal of "good status" should be achieved by the year 2015, and having reached this horizon, now is a suitable time to assess the changes that have taken place with the progressive implementation of the WFD. An extensive database is available for the Guadalhorce River basin, and this was used not only to identify in groundwater but also to draw real conclusions with respect to the degree of success in meeting the targets established for this main deadline (2015) The geographic and climate context of the Guadalhorce basin has facilitated the development of a variety of economic activities, but the one affecting the largest surface area is agriculture (which is practised on over 50 % of the river basin). The main environmental impacts identified in the basin aquifers arise from the widespread use of fertilisers and manures, together with the input of sewage from population centres. In consequence, some of the groundwater bodies located in the basin have historically had very high nitrate concentrations, often exceeding 200 mg/L. In addition, return flows, the use of fertilisers and other pressures promote the entry of other pollutants into the groundwater, as well as the salinisation of the main aquifers in the basin. In order to assess the hydrochemical changes that have taken place since the entry into force of the WFD, we performed a detailed trends analysis, based on data from the official sampling networks. In some cases, over 35 years of water quality data are available, but these statistics also present significant limitations, due to some deficiencies in the design or management; thus, data are missing for many years, the results are subject to seasonality effects, there are gaps in the historical records obtained by the monitoring networks and other shortcomings. The results obtained were analysed with the non-parametric Mann-Kendall test and revealed a general upward trend of pollutants in the areas affected by major pressures. In this analysis, we evaluated not only the increase or decrease in pollutants but also the different processes detected and the sources of pollution within the basin area. Our evaluation shows that robust measures should be taken in order to prevent further major degradation of groundwater quality and to enable "good quality" status to be achieved in future extensions of the WFD.

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“…This test is widely used to identify significant trends in hydrological, climatological, meteorological and water quality data time series (Cailas et al 1986;Haktanir et al 2013;Hipel et al 1988;Ş en 2013;Topaloglu et al 2012). For a time series X = {x 1 , x 2 ,… x n }, the Mann- Kendall trend test statistic (S) is calculated in the following equations.…”

Section: Discussionmentioning

confidence: 99%

Ten-year change of total phosphorous pollution in the Min River, an upstream tributary of the Three Gorges Reservoir

et al. 2016

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Understanding the spatial and temporal variation of nutrient concentrations, loads and their distribution from upstream tributaries is important for management of large lakes and reservoirs. The Min River is an important tributary of the upper reaches of the Three Gorges Reservoir (TGR) that contributes about 20 % of the inflow water from the Yangtze River to the TGR. It is also one of the main phosphorous sources of the TGR. In this study, total phosphorous (TP) concentrations and hydrological data from 2004 through 2014 for 13 sites in Min River and its tributaries were analyzed. The result suggested that the concentration of TP was comparatively lower in the upstream of the Min River and Dadu River, but tended to increase in recent years. Additionally, the TP pollution status in the Min River basin has gradually evolved from local pollution to whole-basin pollution. The concentration of TP in the Min River main stream increased, decreased and then increased again along the waterway. Pollution from nonpoint sources was the main contribution in the upstream portion and Outer River basin of Min River. Pollution from point sources was more serious than that from nonpoint sources in Chengdu, Meishan and Leshan segment. Specifically, TP pollution in Min River of Chengdu segment (Huanglongxi, Inner River) was primarily affected by urbanization, while Leshan segment (Yuebo) was mainly affected by glyphosate production. Controlling pollution from nonpoint sources and improving the sewage collection rate to reduce TP loads will be the primary task in the upstream portion and Outer River basin. Point source pollution controlling will still be the primary task associated with water quality management in the Inner River (Chengdu segment) and the downstream (Leshan segment) basin of Min River for the foreseeable future. Pollution from both point sources and nonpoint sources should be cared in the other area of Min River basin.

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Stochastic analyses of maximum daily rainfall series recorded at two stations across the Mediterranean Sea

Cited by 20 publications

References 30 publications

Variability and Trend of Annual Maximum Daily Rainfall in Northern Algeria

Variability and Trend of Annual Maximum Daily Rainfall in Northern Algeria

Assessment of hydrochemical trends in the highly anthropised Guadalhorce River basin (southern Spain) in terms of compliance with the European groundwater directive for 2015

Ten-year change of total phosphorous pollution in the Min River, an upstream tributary of the Three Gorges Reservoir

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