scholarly journals Modeling Changes in the Composition of River Water with Discharged Wastewater: A Case Study in NW Russia

Water ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 165
Author(s):  
Alexander I. Malov ◽  
Evgeniya S. Sidkina ◽  
Mikhail V. Mironenko ◽  
Alexey S. Tyshov ◽  
Elena V. Cherkasova
Keyword(s):  
Surface Water ◽  
Chemical Elements ◽  
Conservation Status ◽  
Simplex Algorithm ◽  
Drainage Water ◽  
Discharge Zone ◽  
Mining Operations ◽  
Diamond Deposit ◽  
Further Development

The technogenic impact of the development of the Lomonosov diamond deposit is associated with the discharge of quarry and drainage water into the river, which has a special conservation status. Earlier studies on the composition of bottom sediments showed that there are signs of increased accumulation of heavy metals and radionuclides at wastewater discharge sites. The purpose of this work was to predict changes in the composition of surface water and bottom sediment in the river during the further development of mining operations with brackish and salty water captured by drainage systems, the presence of which was established in the zone of their future influence. For this, a simulation of changes in the composition of the water in the river was carried out using the GEOCHEQ software package by minimizing the free energy of the system using a convex simplex algorithm. It was found that the maximum salinity of surface water can reach 1.51 g/L. In this case, the MPC of Cl−, Na+, SO42−, Mg2+, Sr, V, and U can be exceeded for fishery watercourses. The genetic basis of the accumulation of these components in solutions for mixing was considered. According to the calculations, when about 5000 m3/h of drainage water is discharge d into the river, the mass of precipitated chemical elements will be 56–191 t/h, including up to 2.1 t/h of iron; therefore, accumulation in the discharge zone must be controlled.

Surface Water Quality Assessment. Case Study: Târnava Mare River, Mediaș Town-Romania

2011 ◽  
Vol 4 (5) ◽  
pp. 70-72
Author(s):  
Cristina Roşu ◽  
◽  
Ioana Piştea ◽  
Carmen Roba ◽  
Mihaela Mihu ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Quality Assessment ◽  
Surface Water Quality ◽  
Water Quality Assessment

Management of Optic Neuritis in Ayurveda - A Special Case Report

2018 ◽  
Vol 3 (5) ◽  
Author(s):  
Dr. Harsha S. ◽  
Dr. Mamatha KV.
Keyword(s):  
Optic Nerve ◽  
Optic Neuritis ◽  
Visual Information ◽  
Vision Loss ◽  
Specific Treatment ◽  
Interesting Case ◽  
Treatment Modalities ◽  
Further Development ◽  
Special Case

The optic nerve carries visual information from your eye to your brain. Optic neuritis is when your optic nerve becomes inflamed. Optic neuritis can flare up suddenly from an infection or nerve disease. The inflammation usually causes temporary vision loss that typically happens in only one eye. Those with Optic neuritis sometimes experience pain. As you recover and the inflammation goes away, your vision will likely return. There are no direct references in our classics regarding optic neuritis but can be contemplated as a condition by name Parimlayi Timira. The specific management as such is not cited but a transcendence approach can be done with adopting the treatment which has the ability to pacify the already occurred pathology and prevent the further development of the disease. One such interesting case study on Optic neuritis is elaborated here where in specific treatment modalities (Shodana, Shamana and Kriyakalpas) played role in pacifying the condition.

Poetics and subjectivities between classicism and Romanticism

2018 ◽  
Author(s):  
Andrew Kahn ◽  
Mark Lipovetsky ◽  
Irina Reyfman ◽  
Stephanie Sandler
Keyword(s):  
Eighteenth Century ◽  
Case Studies ◽  
Literary Culture ◽  
Human Subjectivity ◽  
Literary Forms ◽  
Russian Poetry ◽  
Development Of Identity ◽  
Further Development

In the context of Sentimentalism in the 1770s, literary culture opened up to representations of human subjectivity. The chapter considers genres of poetry devoted to the themes of pleasure, death, and posterity. It also considers the spaces of poetry and modes of exchange, whether through the album, the salon, and the verse epistle. Two case studies explore the use of different literary forms in the further development of identity, individual and also authorial. The first looks at Radishchev’s experiment in writing a fictional diary as a psychological exercise. The second examines the tradition of imitation of Horace’s Monument poem in Russian poetry in the eighteenth century as well as by later poets, such as Pushkin and Brodsky. The case study shows how these Russian versions express changing ideas about imitation and originality as well as poets’ concern with posterity.

scholarly journals Impact of Controlled Drainage and Subirrigation on Water Quality in the Red River Valley

Water ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 308
Author(s):  
Kristen Almen ◽  
Xinhua Jia ◽  
Thomas DeSutter ◽  
Thomas Scherer ◽  
Minglian Lin
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Water Quality ◽  
Drainage Water ◽  
River Valley ◽  
Red River ◽  
Nutrient Loss ◽  
Controlled Drainage ◽  
Red River Valley ◽  
The Impact

The potential impact of controlled drainage (CD), which limits drainage outflow, and subirrigation (SI), which provides supplemental water through drain tile, on surface water quality are not well known in the Red River Valley (RRV). In this study, water samples were collected and analyzed for chemical concentrations from a tile-drained field that also has controlled drainage and subirrigation modes in the RRV of southeastern North Dakota from 2012–2018. A decreasing trend in overall nutrient load loss was observed because of reduced drainage outflow, though some chemical concentrations were found to be above the recommended surface water quality standards in this region. For example, sulfate was recommended to be below 750 mg/L but was reported at a mean value of 1971 mg/L during spring free drainage. The chemical composition of the subirrigation water was shown to have an impact on drainage water and the soil, specifically on salinity-related parameters, and the impact varied between years. This variation largely depended on the amount of subirrigation applied, soil moisture, and soil properties. Overall, the results of this study show the benefits of controlled drainage on nutrient loss reduction from agricultural fields.

scholarly journals Conservation status assessment of the highest forests in the world: Polylepis flavipila forests as a case study

2021 ◽  
Vol 7 (1) ◽  
pp. 160-169
Author(s):  
Fressia Nathalie Ames-Martínez ◽  
Harold Rusbelth Quispe-Melgar ◽  
Daniel Renison
Keyword(s):  
Conservation Status ◽  
The World ◽  
Status Assessment

scholarly journals Monitoring Lakes Surface Water Velocity with SAR: A Feasibility Study on Lake Garda, Italy

2021 ◽  
Vol 13 (12) ◽  
pp. 2293
Author(s):  
Marina Amadori ◽  
Virginia Zamparelli ◽  
Giacomo De Carolis ◽  
Gianfranco Fornaro ◽  
Marco Toffolon ◽  
...  
Keyword(s):  
Surface Water ◽  
Wind Waves ◽  
Test Site ◽  
Water Velocity ◽  
Surface Velocity ◽  
Medium Size ◽  
Small Scale ◽  
Lake Garda ◽  
Marine Applications

The SAR Doppler frequencies are directly related to the motion of the scatterers in the illuminated area and have already been used in marine applications to monitor moving water surfaces. Here we investigate the possibility of retrieving surface water velocity from SAR Doppler analysis in medium-size lakes. ENVISAT images of the test site (Lake Garda) are processed and the Doppler Centroid Anomaly technique is adopted. The resulting surface velocity maps are compared with the outputs of a hydrodynamic model specifically validated for the case study. Thermal images from MODIS Terra are used in support of the modeling results. The surface velocity retrieved from SAR is found to overestimate the numerical results and the existence of a bias is investigated. In marine applications, such bias is traditionally removed through Geophysical Model Functions (GMFs) by ascribing it to a fully developed wind waves spectrum. We found that such an assumption is not supported in our case study, due to the small-scale variations of topography and wind. The role of wind intensity and duration on the results from SAR is evaluated, and the inclusion of lake bathymetry and the SAR backscatter gradient is recommended for the future development of GMFs suitable for lake environments.

Analysis of the presence of anti-inflammatories drugs in surface water: A case study in Beberibe river - PE, Brazil.

Chemosphere ◽  
2019 ◽  
Vol 222 ◽  
pp. 961-969 ◽  
Author(s):  
Tatiane Barbosa Veras ◽  
Anderson Luiz Ribeiro de Paiva ◽  
Marta Maria Menezes Bezerra Duarte ◽  
Daniela Carla Napoleão ◽  
Jaime Joaquim da Silva Pereira Cabral
Keyword(s):  
Surface Water
Sign in / Sign up

Export Citation Format

Share Document