Special Issue "Assessing Water Quality by Statistical Methods"

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Aquatic Systems—Quality and Contamination".

Deadline for manuscript submissions: 15 December 2020.

Special Issue Editor

Dr. Alina Barbulescu
Website
Guest Editor
Ovidius University of Constanta, Constanta, Romania
Interests: hydrology; applied statistics; mathematical modelling; time series analysis; water quality assessment
Special Issues and Collections in MDPI journals

Special Issue Information

Dear Colleagues,

Society's progress has resulted in increasing the quantity of pollutants emitted in the environment. Water is one of the natural resources most affected by economic activity, with pollutants reaching water bodies without proper treatment. Climate change impacts the water quality as well. Water pollution damages organisms living in the water and many ecosystems. In a world where over 4 billion people suffer from water scarcity, preserving the water resources, assessing the water quality, and remediation are essential.

This Special Issue will feature the latest advances and developments in statistical approaches for evaluation and forecasting of water resources quality. The development of new methodologies and improving the known methods are especially welcome.

The main topics of this  Special Issue include but are not limited to:

  • Water quality indicators
  • Parametric and nonparametric approaches for assessing the groundwater vulnerability
  • Spatial distribution and uncertainty in detecting the pollutants dissipation in water
  • Assessing pollutant transport in water
  • Quantitative and qualitative analysis of spatial and spatio-temporal hydrological data
  • Hazards and risks for hydrological series data
  • Impact of climate change on water resource quality
  • Hydrological drought
  • Methods for assessing the interaction between water quality and ecosystems.

Articles presenting new mathematical models that can be validated by statistical methods, for water resources modelling and forecast, are also welcome.

Dr. Alina Barbulescu
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Water quality indicators
  • Groundwater vulnerability
  • Pollutant
  • Statistical methods

Published Papers (4 papers)

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Research

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Open AccessArticle
The Impact of Human Interventions and Changes in Climate on the Hydro-Chemical Composition of Techirghiol Lake (Romania)
Water 2020, 12(8), 2261; https://doi.org/10.3390/w12082261 - 12 Aug 2020
Abstract
The aim of this study is to establish the potential effect of changes in climate and anthropic interventions made over time on the hydro-chemical properties of the Techirghiol Lake. Located in the littoral region of the Black Sea, Techirghiol Lake is the most [...] Read more.
The aim of this study is to establish the potential effect of changes in climate and anthropic interventions made over time on the hydro-chemical properties of the Techirghiol Lake. Located in the littoral region of the Black Sea, Techirghiol Lake is the most hypersaline lake of Romania—well-known for the therapeutic properties of the saline water and sapropelic mud. Long-term time series of salinity and water level were investigated in relation to the lake water inputs (precipitation, overland flow and groundwater), to chemical parameters (pH, DO and BOD5) and also to the hydraulic works designed and built in the region. The obtained results reveal a degradation of this ecosystem in the period of 1970–1998, when the extensive irrigation practice in the proximity of the lake had a negative effect on the water budget of Techirghiol Lake (an increased freshwater input through runoff and seepage), followed by a major decrease of the lake’s salinity. Full article
(This article belongs to the Special Issue Assessing Water Quality by Statistical Methods)
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Open AccessArticle
Evaluation of the Gulf of Aqaba Coastal Water, Jordan
Water 2020, 12(8), 2125; https://doi.org/10.3390/w12082125 - 27 Jul 2020
Abstract
(1) Background: The Gulf of Aqaba (GoA) supports unique and diverse marine ecosystems. It is one of the highest anthropogenically impacted coasts in the Middle East region, where rapid human activities are likely to degrade these naturally diverse but stressed ecosystems. (2) Methods: [...] Read more.
(1) Background: The Gulf of Aqaba (GoA) supports unique and diverse marine ecosystems. It is one of the highest anthropogenically impacted coasts in the Middle East region, where rapid human activities are likely to degrade these naturally diverse but stressed ecosystems. (2) Methods: Various water quality parameters were measured to assess the current status and conditions of GoA seawater including pH, total dissolved solids (TDS), total alkalinity (TA), Cl, NO3, SO42−, PO43−, NH4+, Ca2+, Mg2+, Na+, K+, Sr, Cd, Co, Cr, Cu, Fe, Mn, Pb, and Zn. (3) Results: The pH values indicated basic coastal waters. The elevated levels of TDS with an average of about 42 g/L indicated highly saline conditions. Relatively low levels of inorganic nutrients were observed consistent with the prevalence of oligotrophic conditions in GoA seawater. The concentrations of Ca2+, Mg2+, Na+, K+, Sr, Cl, and SO42− in surface layer varied spatially from about 423–487, 2246–2356, 9542–12,647, 513–713, 9.2–10.4, 22,173–25,992, and 317–407 mg/L, respectively. The average levels of Cd, Co, Cr, Cu, Fe, Mn, Pb and Zn ranged from 0.51, 0.38, 1.44, 1.29, 0.88, 0.38, and 6.05 µg/L, respectively. (4) Conclusions: The prevailing saline conditions of high temperatures, high evaporation rates, the water stratification and intense dust storms are major contributing factors to the observed seawater chemistry. The surface distribution of water quality variables showed spatial variations with no specific patterns, except for metal contents which exhibited southward increasing trends, closed to the industrial complex. The vast majority of these quality parameters showed relatively higher values compared to those of other regions. Full article
(This article belongs to the Special Issue Assessing Water Quality by Statistical Methods)
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Open AccessArticle
Characteristics and Causes of Long-Term Water Quality Variation in Lixiahe Abdominal Area, China
Water 2020, 12(6), 1694; https://doi.org/10.3390/w12061694 - 13 Jun 2020
Abstract
The Lixiahe abdominal area is a representative plain river network in the lower reaches of the Huai River, being an upstream section of south-to-north water diversion from the Yangtze River in Jiangsu Province, China. The assessment of long-term water quality variation and the [...] Read more.
The Lixiahe abdominal area is a representative plain river network in the lower reaches of the Huai River, being an upstream section of south-to-north water diversion from the Yangtze River in Jiangsu Province, China. The assessment of long-term water quality variation and the identification of probable causes can provide references for sustainable water resources management. Based on the monthly water quality data of 15 monitoring stations in the Lixiahe abdominal area, the periodic characteristics and tendency of water quality variation were studied by combining wavelet analysis, the Mann–Kendall trend test, and Sen’s slope estimator, and the correlation between water quality variation, water level, and water diversion was discussed with cross wavelet transform and wavelet coherence. The results show that the comprehensive water quality index (CWQI) included periodic fluctuations on multiple scales from 0.25 to 5 years. The CWQI of 7 out of 15 monitoring stations has a significant decreasing trend, indicating regional water quality improvement. The trend slope ranges from −0.071/yr to 0.007/yr, where −0.071/yr indicates the water quality improvement by one grade in 15 years. The spatial variation of water quality in the Lixiahe abdominal area was significant. The water quality of the main water diversion channels and its nearby rivers was significantly improved, while the improvement of other areas was not significant or even became worse due to the increasing discharge of pollutants. The CWQI of the main water diversion channels and its nearby rivers was inversely correlated with the amount of water diversion. The greater the amount of water diversion, the better the water quality. The water diversion from the Yangtze River has played an important role in improving the regional water environment. Full article
(This article belongs to the Special Issue Assessing Water Quality by Statistical Methods)
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Review

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Open AccessReview
Assessing Groundwater Vulnerability: DRASTIC and DRASTIC-Like Methods: A Review
Water 2020, 12(5), 1356; https://doi.org/10.3390/w12051356 - 11 May 2020
Abstract
Groundwater vulnerability studies are sources of essential information for the management of water resources, aiming at the water quality preservation. Different methodologies for estimating the groundwater vulnerability, in general, or of the karst aquifer, in particular, are known. Among them, DRASTIC is one [...] Read more.
Groundwater vulnerability studies are sources of essential information for the management of water resources, aiming at the water quality preservation. Different methodologies for estimating the groundwater vulnerability, in general, or of the karst aquifer, in particular, are known. Among them, DRASTIC is one of the most popular due to its performance and easy-to-use applicability. In this article, we review DRASTIC and some DRASTIC-like methods introduced by different scientists, emphasizing their applications, advantages, and drawbacks. Full article
(This article belongs to the Special Issue Assessing Water Quality by Statistical Methods)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

1. Statistical approaches to groundwater quality in the Liwa area, Abu Dhabi Emirate

 Alina Barbulescu1 and Yousef Nazzal2

1Ovidius University of Constanta, Romania

2Zayed University, United Arab Emirates

Abstract: Last period groundwater quality raises big concern all over the world given that this is an important source of drinkable water and for agricultural use. While the suitability of the groundwater Liwa aquifer in Abu Dhabi Emirate for agricultural use has been previously studied, not all the water parameters have been considered. Therefore, in this paper we propose the study of 42 concentrations series of 19 groundwater parameters. The similarity of water parameters at the study sites is tested and the samples are grouped clusters. The main parameters that determine the differences between the groups are determined by Principal Component Analysis. Finally, a quality index is proposed and compared with the previous studies of the aquifer vulnerability. 


2. Changes in hidro-climatic variables and the risk of arborovirosis in Romania

Carmen Elena Maftei,

Carmen Maftei1,2, Sorin Rugina2, Irina Magdalena Dumitru2

1,2Transilvania University, Brasov, Romania

2Ovidius University of Constanta, Romania

Abstract: The Ae. Albopictus mosquito species is an important vector for different diseases as: Dengue fever, Zika, etc. In Europe, this mosquito species is not an "indigenous" one and its establishment is conditioned by the environmental and species characteristics. In order to assess the possible spread of Ae albopictus in Romania, especially in Dobrogea region (situated in the Southeast of Romania between the Black Sea -East, lower Danube -West and Danube Delta in North), we investigated the interrelationship between hydro-climate parameters via GIS. A statistical analysis of the time series data will be provided to demonstrate if the principal hydro-climate parameters change in time. 

 

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