scholarly journals Vulnerability assessment and potential contamination of unconfined aquifers

2018 ◽  
Vol 19 (4) ◽  
pp. 1008-1016 ◽  
Author(s):  
J. Caprario ◽  
A. S. Rech ◽  
A. R. Finotti

Abstract The decline in groundwater availability and quality has become a worldwide issue and has been the subject of several studies in recent decades. In this sense, the goal of this study is to assess the vulnerability of the Campeche Aquifer (Florianopolis, Brazil), identifying potential areas of possible contamination by the direct infiltration of runoff in drainage compensatory techniques. To achieve this goal, the following methodological steps were used: (1) data collection and preparation, (2) application of the DRASTIC model, (3) sensitivity analysis and (4) analysis of potential contamination by compensatory techniques. The results show that approximately 33% of the aquifer area presented moderate vulnerability to contamination. However, 29% of the remaining areas had high and extremely high vulnerability. Analysing the potential of contamination with drainage compensatory structures we verified that approximately 95% of them are located in areas of vulnerability classified as moderate and high. The other 5% were identified in areas with extremely high vulnerability. Sensitivity analyses indicated that the removal of topography, soil type and the impact of the vadose zone caused a large variation in vulnerability index. It is evident that there is a high potential of contamination of groundwater by direct infiltration of drainage compensatory structures.

2018 ◽  
Vol 24 (3) ◽  
pp. 293-304 ◽  
Author(s):  
Ismail Chenini ◽  
Adel Zghibi ◽  
Mohamed Haythem Msaddek ◽  
Mahmoud Dlala

Abstract The groundwater vulnerability assessment is normally applied to rural watersheds. However, urbanization modifies the hydrogeological processes. A modified DRASTIC model was adopted to establish a groundwater vulnerability map in an urbanized watershed. The modified DRASTIC model incorporated a land-use map, and net recharge was calculated taking into account the specificity of the urban hydrogeological system. The application of the proposed approach to the Mannouba watershed demonstrates that the groundwater vulnerability indexes range from 80 to 165. The study's results shows that 30 percent of the Mannouba watershed area has a high vulnerability index, 45 percent of the area has a medium index, and 25 percent of the study area has a low vulnerability index. To specify the effect of each DRASTIC factor on the calculated vulnerability index, sensitivity analyses were performed. Land use, topography, and soil media have an important theoretical weight greater than the effective weight. The impact of the vadose zone factor has the most important effective weight and affects the vulnerability index. The sensitivity assessment explored the variation in vulnerability after thematic layer removal. In this analysis, the removal of hydraulic conductivity and impact of vadose zone modified the vulnerability index. Groundwater vulnerability assessment in urbanized watersheds is difficult and has to consider the impact of urbanization in the hydrogeological parameters.


2016 ◽  
Vol 20 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Johnny Colins ◽  
M. C. Sashikkumar ◽  
P. A. Anas ◽  
M. Kirubakaran

<p>Groundwater is vulnerable and more susceptible to contamination from various anthropogenic elements. Various steps are taken to measure the groundwater vulnerability for a sustainable groundwater development. The present study estimates the aquifer vulnerability by applying DRASTIC model in the Geographic Information System (GIS) environment. The DRASTIC model uses seven hydrological parameters which include depth to water level, net recharge, aquifer media, soil media, topography, the impact of vadose zone and hydraulic conductivity. DRASTIC index was calculated from DRASTIC model that ranged from 31 to 154. All these parameters characterize the hydrological setting for evaluating aquifer vulnerability. Sensitivity analyses have also been performed to determine the sensitivity of every individual DRASTIC parameter towards the aquifer vulnerability. Sensitivity analysis indicated that all the parameters have an almost similar influence on vulnerability index. Depth to water parameter inflicts larger impact on aquifer vulnerability followed by recharge, topography and soil Media. The whole of Kodaganar basin is classified into very low, low, moderate and high vulnerable zones. Nearly three- fourth of the basin has very low and low vulnerability. Incorporating DRASTIC model in the GIS environment has proved efficient in handling large volumes of data and in determining the groundwater vulnerability. </p><p> </p><div class="page" title="Page 1"><div class="section"><div class="layoutArea"><div class="column"><p><strong>Evaluación basada en el Sistema de Información Geográ ca a la vulnerabilidad de un acuífero a partir del método DRASTIC: caso de estudio en la cuenca Kodaganar </strong></p><p><strong><br /></strong></p><p><strong>Resumen</strong></p><p>El agua subterránea es vulnerable y más susceptible a la contaminación de varios elementos antropogénicos. Se midió la vulnerabilidad del agua subterránea en varias etapas para establecer el desarrollo sustentable de la fuente acuífera. Este trabajo estima la vulnerabilidad del agua subterránea por la aplicación del método DRASTIC en el entorno del Sistema de Información Geográfica (GIS, en inglés). El método DRASTIC utiliza siete parámetros hidrológicos: profundidad del agua subterránea, recarga neta, litología del acuífero, tipo de suelo, topografía naturaleza de la zona no saturada y conductividad hidráulica del acuífero. El índice DRASTIC fue calculado a través de este método y que oscila entre 31 y 154 unidades. Estos parámetros caracterizan la configuración hidrológica para la evaluación de vulnerabilidad del acuífero. También se realizaron los análisis de susceptibilidad para determinar la respuesta de cada parámetro DRASTIC frente a la vulnerabilidad del agua subterránea. El análisis de susceptibilidad indicó que todos los parámetros tienen una influencia similar en el índice de vulnerabilidad. El parámetro de profundidad ocasiona un mayor impacto en el índice de vulnerabilidad, seguido por la recarga, la topografía y el tipo de suelo. Toda la cuenca de Kodaganar se clasifica en zonas de vulnerabilidad muy baja, baja, moderada y alta. La incorporación del método DRASTIC en el entorno GIS prueba la e ciencia en el manejo de grandes volúmenes de información y en la evaluación de vulnerabilidad de aguas subterráneas.</p>


2019 ◽  
Vol 11 (1) ◽  
pp. 23-28
Author(s):  
Suparno Suparno ◽  
N. Praptiningrum ◽  
Ernisa Purwandari

Pendidikan inklusi sebagai sebuah pendekatan untuk memenuhi kebutuhan pendidikan belajar semua anak, menjadi solusi bagi peserta didik berkebutuhan khusus untuk mendapatkan layanan pendidikan setara dengan peserta didik pada umumnya termasuk siswa berkebutuhan khusus lamban belajar (slow learner). Daerah Istimewa Yogyakarta (DIY) sebagai salah satu provinsi penyelenggara pendidikan inklusi telah menerapkan pendidikan inklusi di semua kabupaten dan kota. Kajian ini penting untuk memperbaiki praktik pendidikan inklusi di DIY selanjutnya. Subjek dalam penelitian ini adalah siswa lamban belajar (slow learner) tingkat dasar (dasar 1-3) di tujuh SD Inklusi di Bantul. Hasil penelitian menunjukkan bahwa 1) implementasi pendidikan inklusi memberikan dampak positif terhadap capaian akademik membaca dan aritmatika siswa lamban belajar; 2) implementasi pendidikan inklusi belum menunjukkan dampak yang positif terhadap capaian akademik menulis siswa lamban belajar. Penelitian masih terbatas pada siswa lamban belajar sehingga perlu pengkajian lebih lanjut akan dampak pendidikan inklusi pada siswa berkebutuhan khusus lainnya. Inclusive education as an approachment to meet the needs of learning all children be a solution for students with special needs to get the services of education equivalent to students in general included in it students slow learner. Daerah Istimewa Yogyakarta (DIY) as one of the provinces of the organizers inclusive education in all of the regency and the city. This study is an important to improve the practice of inclusive education in DIY next time. The subject in this research are students with slow learner the basic (basic 1- 3) in seventh inclusive elementary school in Bantul. The results of the research indicate that 1) implementation inclusive education give a positive impact on their academic reading and arithmetical students with slow learner; 2) implementation inclusive education has not shown a positive impact on their academic wrote students with slow learner. The research is still limited on the students with slow learner so that need to more assessment will be the impact of inclusive education on the other students with special needs.


2022 ◽  
Vol 17 (1) ◽  
pp. 16-22
Author(s):  
Daria Bilenko ◽  
◽  
Serhii Kozlovskyi ◽  
Natalya Ivanyuta ◽  
Viktoriia Baidala ◽  
...  

Ongoing global COVID-19 pandemic is not only health crisis but the economic challenge. The future of society depends on how successfully the authorities find a balance between imposition of stringent restrictions and economic development. Tax policies play a role in reducing losses caused by the COVID-19 lockdowns. All countries are taking tax measures to mitigate the impact of the effects of COVID-19 pandemic on society. While the COVID-19 pandemic has not yet been defeated, it is too early to draw conclusions about which tax measures against the effects of COVID-19 are efficient. On the other hand, correct trajectory of economic recovery can be missed if not to analyze the other countries experience. The object of this study is tax measures in the European countries against the effects of COVID-19. The subject of the study is the fuzzy set theory to assess the efficiency of tax measures in the European countries against the effects of COVID-19. The aim of the study is to find out which European countries have been more succeeded in tax measures implementing and type of their immediate crisis response. The analysis is carried out in 29 European countries. The result of the study allows to state that the number of tax measures against the effects of COVID-19 does not affect their efficiency and the most popular type of immediate crisis response has been the business cash-flow enhances.


2018 ◽  
Vol 63 (216) ◽  
pp. 85-109 ◽  
Author(s):  
Sinisa Radic

The subject of the research in this paper is the impact of intellectual capital efficiency on the profitability of commercial banks in the Republic of Serbia. The efficiency of commercial banks? intellectual capital was measured by the created value added in the observed period, using the Value Added Intellectual Coefficient methodology (VAIC). Empirical analysis was carried out using econometric analysis of panel data for 27 banks that were operating in the banking sector of the Republic of Serbia in the period 2008-2016. The results of the analysis show that the significance of the impact of the efficient use of intellectual capital on the profitability of banks operating in Serbia depends on the selected profitability measure. When ROA is chosen as an indicator of profitability the bank?s level of indebtedness determines the sign of this influence, so at higher levels of indebtedness efficient use of intellectual capital negatively affects the profitability of the bank. On the other hand, in this case the size of the bank does not significantly affect the dependence of the bank?s profitability on the efficient use of its intellectual capital. If ROE is a measure of the profitability of banks the efficient use of intellectual capital has no significant impact on banks? profitability.


1994 ◽  
Vol 4 (5) ◽  
pp. 333-336 ◽  
Author(s):  
K. SjÖVall ◽  
B. Nilsson ◽  
N. Einhorn

The significance of tumor spill in the early stages of ovarian carcinoma has been the subject of controversy. Since rupture of the capsule of the tumor may occur in several different ways, we analyzed all cases of early ovarian cancer treated at Radiumhemmet, Stockholm, Sweden, during the period 1974–1986, in which possible spill of tumor cells was catalogued in different groups. In 247 out of 394 patients (62%) the risk of spill had to be considered. There was no difference in survival between patients whose tumors had intact capsules and patients in whom rupture occurred during surgery—78% and 85%, respectively. On the other hand, a significant difference in survival was found between patients in whom rupture occurred before surgery and those with intraoperative rupture—59% and 85%, respectively. The conclusion can be drawn that manipulation during surgery which results in puncture or rupture does not have a negative influence on the outcome for the patients.


2011 ◽  
Vol 19 (4) ◽  
pp. 509-525 ◽  
Author(s):  
Paul Dietschy

This article argues that the question of national perspectives is a fundamental problem in the writing of European sports history. It does so by demonstrating that France has an equal pedigree, in terms of diffusion and exceptionalism, as Britain, and pleads for a less skewed approach to the history of the subject in general. The article shows, first, that France contributed significantly to the internationalization of sport in the nineteenth and early twentieth centuries, with French networks facilitating the spread of sports across the globe. It considers the impact of French universalism on the institutional structures of world sport and assesses the importance of sport to governmental diplomacy. Second, it proposes that France occupies a special place in the history of European sport, halfway between that of the British on the one hand and other continental sporting cultures on the other. It discusses the role of central and regional administrations in the creation of a sports space that is distinctly marked by a lack of football hegemony. French sport, the article concludes, is characterized by a peculiar mix of anglomanie, invented traditions, internationalism, state interventionism and eclecticism.


2009 ◽  
Vol 49 (1) ◽  
pp. 49-97 ◽  
Author(s):  
Basheer M. Nafi

AbstractIn 1298/1881, the Iraqi scholar Nu'mān al-Alūsī published his Jalā' al-'aynayn fī muhākamat al-Ahmadayn, one of the most astute tracts to be written in defense of the fourteenth-century Hanbalī scholar, Ibn Taymiyya. This article attempts to read into the significance of Jalā' al-'aynayn by studying the life and educational environment of its author, the subject matter of the book, the format in which it appeared, and the circumstances of its publishing. There is little doubt that Jalā' al-'aynayn is a founding text in the emergence of modern Salafiyya in major Arab urban centers. Considering the contribution of the Wahhābī movement to the revival of Salafī Islam, one of the aims of this article is to look into the variant expressions of modern Salafiyya. An important aspect of the impact of Nu'mān al-Alūsī's work is related to the way he treated his subject matter, reconstituting the legacy of Ibn Taymiyya in the Muslims' imagination of their traditions. The other, was the publishing of Jalā' al-'aynayn in print. In the following decades, the ecology of Islamic culture would be transformed at a dramatic pace. But two things would not lose their value for the Salafī circles of modern Islam, the referential position of Ibn Taymiyya and the power of the printing-press.


Percurso ◽  
2019 ◽  
Vol 2 (29) ◽  
pp. 134
Author(s):  
Debora Cristina de Castro da ROCHA ◽  
Edilson Santos da ROCHA

RESUMO Pretende-se com esta pesquisa, uma discussão acerca do impacto da Lei 13.467/2017 ao sindicalismo, no que tange a proibição do desconto ou cobrança sem a prévia e expressa anuência do trabalhador e a voluntariedade da sua ocorrência. Assim, a partir de uma contextualização histórica, busca-se na essência da criação da contribuição sindical, uma maior compreensão dos efeitos da reforma acerca do tema, tendo em vista esta ter tornado facultativa a contribuição, e se especificamente, aos trabalhadores, tal facultatividade poderá contribuir para a liberdade sindical no Brasil, e por outro lado, se esteja diante de um problema de financiamento dos sindicatos profissionais, e por consequência, da própria defesa dos respectivos trabalhadores. Buscar-se-á ainda, discorrer acerca da não recepção da Convenção n. 87 de 1948 pela Constituição de 1988, que dispõe acerca da liberdade sindical. E se a alteração promovida pela Reforma Trabalhista poderá proporcionar maior aproximação dos sindicatos com os trabalhadores, influenciando a anuência com o desconto da contribuição sindical. PALAVRAS-CHAVE: Lei 13.467/2017; Sindicalismo; Contribuição Sindical; Reforma Trabalhista; Liberdade Sindical. ABSTRACT This discussion seeks to discuss the impact of Law 13467/2017 on trade unionism, regarding the prohibition of deduction or collection without the prior and express consent of the worker and the voluntariness of its occurrence. Thus, from a historical context, the essence of the creation of the union contribution is sought, a greater understanding of the effects of the reform on the subject, in order to make the contribution optional, and if specifically to the workers, this faculty can contribute to freedom of association in Brazil, and, on the other hand, there is a problem of financing trade unions and, consequently, the defense of the workers themselves. It will also be sought to find out whether the union uniqueness imposed by the 1988 Constitution could harm Convention No. 87 of 1948 which deals with freedom of association. And if the amendment promoted by the Labor Reform can bring the unions closer to the workers, influencing the agreement with the discount of the union contribution.KEYWORDS: Law 13467/2017; Trade Unionism; Union Contribution; Labor Reform; Freedom Of Association. 


2019 ◽  
Vol 7 (1) ◽  
pp. 24-30
Author(s):  
Rolando Manuel Reyes Padilla ◽  
Felipe Del Ángel Padrón Morales ◽  
Juan Eduardo Soto Luévano ◽  
Carlos Argelio Arévalo Mercado

Los videojuegos representan uno de los mayores fenómenos contemporáneos. Se reporta que hasta un 85% de ellos incluye alguna forma de violencia, generando una preocupación sobre el impacto negativo que pudiera llegar a tener. Esto ha dado lugar a gran número de investigaciones sobre su posible impacto, sin observarse un consenso sobre el tema. La presente investigación tuvo como objetivo medir el impacto de la exposición a videojuegos violentos como uno de los factores que pueden aumentar la agresividad de las personas, mencionado por el “Catalyst Model”. Mediante la realización de un experimento controlado, los resultados sugieren que los videojuegos no fueron un factor de aumento de la agresividad. Se detectaron dos casos anómalos. En el primero, el videojuego no violento tuvo un efecto calmante a actitudes hostiles y en el otro el videojuego violento, fungió como un incrementador de actitudes agresivas. Video games represent one of the greatest contemporary phenomena. It is reported that up to 85% of them include some form of violence, generating a concern about the negative impact that could have. This has led to a large number of research on its possible impact, without observing a consensus on the subject. The objective of this research was to measure the impact of exposure to violent video games as one of the factors that can increase the aggression of people, mentioned by the "Catalyst Model". By conducting a controlled experiment, the results suggest that video games were not a factor in increasing aggressiveness. Two anomalous cases were detected. On the first case, nonviolent videogames worked as a calming effect to hostile attitudes. On the other, they worked in a contrary way with violent videogames, acting as a catalyst of the participant's aggressive attitudes.


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