scholarly journals Fate of Arsenic during Red River Water Infiltration into Aquifers beneath Hanoi, Vietnam

2016 ◽  
Vol 51 (2) ◽  
pp. 838-845 ◽  
Author(s):  
Dieke Postma ◽  
Nguyen Thi Hoa Mai ◽  
Vi Mai Lan ◽  
Pham Thi Kim Trang ◽  
Helle Ugilt Sø ◽  
...  
Keyword(s):  
River Water ◽  
Red River ◽  
Water Infiltration

Field Studies on the Behaviour of Organic Micropollutants During Infiltration of River Water to Ground Water

1987 ◽  
Vol 19 (7) ◽  
pp. 1195-1196 ◽  
Author(s):  
C. Schaffner ◽  
M. Ahel ◽  
W. Giger
Keyword(s):  
Ground Water ◽  
River Water ◽  
Chlorinated Solvents ◽  
Field Studies ◽  
Water Infiltration ◽  
Organic Micropollutants ◽  
Field Site ◽  
Phenolic Pollutants ◽  
One Year ◽  
Observation Wells

The fate of organic micropollutants during ground water infiltration is of great interest since many water works use bank filtration as a first step in the treatment of river water for public water supplies. Field and laboratory studies are necessary to enhance our knowledge on the behaviour of organic chemicals during infiltration of river water to ground water. In an earlier study nonpolar volatile compounds (e.g. tetrachloroethylene, 1,4-dichlorobenzene and 1,3-dimethylbenzene) were investigated in natural river-ground water infiltration systems in Switzerland (Schwarzenbach et al., 1983). In this poster we report on recent work using one of these field sites and studying pentachlorophenol (PCP), nonylphenol (NP), nonylphenol monoethoxylate (NP1EO), nonylphenol diethoxylate (NP2EO) and nitrilotriacetate (NTA), Preliminary results will also be reported for ethylenediaminetetraacetate (EDTA) and polycyclic aromatic hydrocarbons. The field site for our investigation was in the lower Glatt Valley, Switzerland where the Glatt River infiltrates into a quarternary fluvioglacial valley fill aquifer. The Glatt River is a small, rather heavily polluted perialpine river which receives effluents from ten mechanical-biological treatment plants of municipal waste water (Ahel et al., 1984). At the field site the average discharge of the river is approximately 8 m3/sec and permanent infiltration of the river through a saturated zone can be assumed. Observation wells allowed the sampling of freshly infiltrated water at various distances (2,5 - 14 m) from the river. During one year seventeen sample series were collected at approximately monthly intervals including samples from the river and from four ground water observation wells. Pentachlorophenol was determined by a method based on the procedure by Renberg and Lindstróm (1981), Detailed descriptions of the analytical methods for NP, NP1EO, NP2EO and NTA are given elsewhere (Ahel and Giger, 1985; Schaffner and Giger, 1984). The observed averages and ranges of concentrations are given in Table 1. It was concluded that NTA is eliminated rapidly during ground water infiltration. Starting from a range of 8 to 83 mg/m3 and an average of 27 mg/m3 in the river, after 7 m of infiltration only 0.5 mg/m3 are left corresponding to an elimination of 98%. Low temperatures in winter (4 – 6 °C) and reduced oxygen contents in summer had no effect on the efficient elimination of NTA, This result is highly important in addressing the question as to what extent NTA might reach bank filtrated waters from polluted rivers. The phenolic pollutants were eliminated according to the sequence: NP1EO ≈ NP2EO > NP > PCP. This is based on the decrease of the average concentrations over the first seven meters of infiltration. In particular, PCP turned out to be rather persistent in the ground water but not to such a degree as tetrachloroethylene and other chlorinated solvents which had been studied earlier.

scholarly journals Relationship of dissolved inorganic carbon (DIC) concentrations with some environmental variables in the Red River water in the period 2008 - 2015

2016 ◽  
Vol 8 (2) ◽  
pp. 102-106
Author(s):  
Thi Phuong Quynh Le ◽  
Thi Xuan Binh Phung ◽  
Thi Thuy Duong ◽  
Duc Nghia Le ◽  
Tu Cuong Ho
Keyword(s):  
River Water ◽  
Human Activities ◽  
Environmental Variables ◽  
Inorganic Carbon ◽  
Environmental Changes ◽  
Dissolved Inorganic Carbon ◽  
Red River ◽  
Natural Conditions ◽  
Survey Results ◽  
The Impact

Dissolved Inorganic Carbon (DIC) is one of the main chemical components in water and very sensitive with environmental changes. DIC content in river water closely relates with natural weathering process and human activities in the whole basin. Therefore, DIC concentration reflects the impact of natural conditions and human activities in the basin to river water quality. This paper presents the survey results of the DIC concentrations at 4 sites in the Red River system during the period from January 2008 to December 2015 and simultaneously considers the relationship between some environmental variables and the DIC concentrations in the river water. The survey results showed that the DIC concentrations in the Red River water varied from 9.1 to 29.9 mgC.L-1, averaging 19.6 mgC.L-1 during the study period. The DIC concentrations are positively correlated with pH values and some major ions concentrations in river water, such as K+, Na+, Ca2+, SO42- but negatively correlated with water temperature. These relationships also indicate that the DIC concentrations in the Red River water are influenced by natural conditions, rather than by human activities in the river basin. Cacbon vô cơ hòa tan (DIC) là thành phần hóa học cơ bản trong nước và rất nhạy cảm với những thay đổi của các yếu tố môi trường. DIC có mối liên hệ chặt chẽ với sự phong hóa tự nhiên và các hoạt động của con người trên quy mô toàn lưu vực. Do đó, DIC phản ánh mức độ tác động của các điều kiện tự nhiên và con người trong lưu vực tới chất lượng nước sông. Bài báo trình bày kết quả quan trắc hàm lượng DIC trong nước sông Hồng, đồng thời xem xét mối quan hệ giữa một số yếu tố môi trường với hàm lượng DIC trong nước sông trong giai đoạn 1/2008 – 4/2015. Kết quả cho thấy hàm lượng DIC trong nước sông Hồng dao động trong khoảng 9,1 to 29,9 mgC.L-1, trung bình đạt 19,6 mgC.L-1 trong giai đoạn tháng 1 năm 2008 – tháng 12 năm 2015. Hàm lượng DIC có mối tương quan theo tỷ lệ nghịch với nhiệt độ nước sông; đồng thời có mối tương quan tỷ lệ thuận với giá trị pH và hàm lượng một số ion như K+, Na+, Ca2+, SO42-... tại 4 vị trí quan trắc trên sông Hồng. Các mối quan hệ này thể hiện rằng hàm lượng DIC trong nước sông Hồng chịu ảnh hưởng chính của các đặc điểm tự nhiên hơn là các tác động của con người trong lưu vực.

scholarly journals Assessment of river water infiltration conditions based on both chloride mass-balance and hydrogeological setting: the Krajkowo riverbank filtration site (Poland)

Geologos ◽  
2021 ◽  
Vol 27 (1) ◽  
pp. 35-41
Author(s):  
Jozef Gorski ◽  
Krzysztof Dragon ◽  
Roksana Kruc-Fijalkowska ◽  
Magdalena Matusiak
Keyword(s):  
Surface Water ◽  
River Water ◽  
Water Infiltration ◽  
Riverbank Filtration ◽  
Superficial Zone ◽  
Well Production ◽  
Lower Chloride ◽  
Average Contribution ◽  
Strong Erosion ◽  
Chloride Concentrations

Abstract In the present work measurements of chloride concentrations were used to assess the variability of infiltration conditions and contributions of surface water and local groundwater to the discharge of wells at Krajkowo riverbank filtration site (western Poland). Tests were performed on samples from 26 wells located in a well gallery close to the River Warta. Due to higher chloride concentrations in river water in comparison with local groundwater, significant differences in concentrations in samples from individual wells were noted. In particular, lower chloride concentrations in 11 wells were recorded, which can be linked to the local occurrence of low-permeability deposits in the superficial zone; a locally higher degree of riverbed sediment clogging in the highly convex meandering zone, where strong erosion of the riverbed occurred, which in turn led to increased clogging; the occurrence of a more intensive groundwater inflow into the river valley due to water infiltration from a smaller river entering the River Warta valley, as well as unfavourable conditions for the infiltration of surface water to the lower part of the aquifer with a greater thickness. Differences in chloride concentrations observed were also used to quantify approximately river water contribution to the well production. The average contribution of the River Warta to the recharge of the entire well gallery was estimated at 59.8%.

scholarly journals Hydrochemical evolution of pore water in riverbed sedimentation zone during riverbank infiltration

2021 ◽  
Author(s):  
Shuai Lu ◽  
Shenjie Li ◽  
Zhining Liu ◽  
Xinyue Gao ◽  
Lihua Zhang ◽  
...  
Keyword(s):  
River Water ◽  
Pore Water ◽  
Water Infiltration ◽  
Reductive Dissolution ◽  
Organic Carbon Content ◽  
Hydrochemical Evolution ◽  
Pumping Wells ◽  
Variation Characteristics ◽  
Hydrochemical Composition ◽  
Manganese Minerals

Abstract The riverbed sedimentation zone is an important zone of hydrochemistry, and the biogeochemical action in this zone has a significant impact on groundwater quality. As the main area where hydrochemistry occurs, studying the law of hydrochemical evolution within 1 m below the riverbed is of great significance for understanding the migration and removal of river pollutants. In this study, a combination of onsite monitoring and indoor experiments was used to analyze the variation characteristics of the hydrochemical composition of pore water during riverbank infiltration, as well as the main hydrochemical effects and influencing factors. The results show that in the process of river water infiltration, a series of redox reactions occur in the riverbed sedimentation zone, and there are differences in different infiltration depths. From 0 to 20 cm below the riverbed, strong respiration and denitrification mainly occurred. Reductive dissolution of manganese minerals mainly occurred from 20 to 60 cm, and reductive dissolution of iron minerals mainly occurred from 60 to 90 cm. River water level, dissolved organic carbon content and microbial activity had varying degrees of influence on these redox effects. The recharge of river water infiltration ensures the exploitation amount of the pumping wells, but it also leads to the increase of some components in groundwater, and the extracted water cannot be directly drunk.

scholarly journals 3D crosshole ERT for aquifer characterization and monitoring of infiltrating river water

Geophysics ◽  
2011 ◽  
Vol 76 (2) ◽  
pp. G49-G59 ◽  
Author(s):  
Ilaria Coscia ◽  
Stewart A. Greenhalgh ◽  
Niklas Linde ◽  
Joseph Doetsch ◽  
Laurent Marescot ◽  
...  
Keyword(s):  
River Water ◽  
Preferential Flow ◽  
Time Lapse ◽  
Water Infiltration ◽  
High Resistivity ◽  
River Flooding ◽  
Main Challenge ◽  
Acquisition Scheme ◽  
Definition Of ◽  
Natural Tracer

The hydrogeological properties and responses of a productive aquifer in northeastern Switzerland are investigated. For this purpose, 3D crosshole electrical resistivity tomography (ERT) is used to define the main lithological structures within the aquifer (through static inversion) and to monitor the water infiltration from an adjacent river. During precipitation events and subsequent river flooding, the river water resistivity increases. As a consequence, the electrical characteristics of the infiltrating water can be used as a natural tracer to delineate preferential flow paths and flow velocities. The focus is primarily on the experiment installation, data collection strategy, and the structural characterization of the site and a brief overview of the ERT monitoring results. The monitoring system comprises 18 boreholes each equipped with 10 electrodes straddling the entire thickness of the gravel aquifer. A multichannel resistivity system programmed to cycle through various four-point electrode configurations of the 180 electrodes in a rolling sequence allows for the measurement of approximately 15,500 apparent resistivity values every 7 h on a continuous basis. The 3D static ERT inversion of data acquired under stable hydrological conditions provides a base model for future time-lapse inversion studies and the means to investigate the resolving capability of our acquisition scheme. In particular, it enables definition of the main lithological structures within the aquifer. The final ERT static model delineates a relatively high-resistivity, low-porosity, intermediate-depth layer throughout the investigated aquifer volume that is consistent with results from well logging and seismic and radar tomography models. The next step will be to define and implement an appropriate time-lapse ERT inversion scheme using the river water as a natural tracer. The main challenge will be to separate the superposed time-varying effects of water table height, temperature, and salinity variations associated with the infiltrating water.

scholarly journals Geochemical characteristics of arsenic in groundwater during riverbank filtration: a case study of Liao River, Northeast China

2020 ◽  
Vol 20 (8) ◽  
pp. 3288-3300
Author(s):  
Shuai Lu ◽  
Xiaoyu Feng ◽  
Xiaosi Su
Keyword(s):  
Water Level ◽  
River Water ◽  
Manganese Oxides ◽  
Solid Phase ◽  
Water Infiltration ◽  
Riverbank Filtration ◽  
Arsenic Content ◽  
Groundwater Exploitation ◽  
Groundwater Environment ◽  
Arsenic In Groundwater

Abstract Affected by groundwater exploitation in the riverside, the infiltration of river water to recharge groundwater will cause changes in the groundwater environment, which has an important impact on the geochemical behavior of arsenic in groundwater. In this study, the groundwater environment zones in the process of river water infiltration were divided, and the arsenic content in groundwater in the study area had a good correlation with the environment zones. In the weak oxidation environment zone and the weak reductive environment zone, as the distance from the riverbank increased, the arsenic content gradually increased. In the reduction environment zone, there was a decreasing trend in arsenic content in groundwater. The arsenic content in groundwater varied significantly with the seasons, and its dynamic characteristics were closely related to the water level. The arsenic content in groundwater decreased with the rise in groundwater level, and it responded obviously to the change of water level in the shallows. Overall, arsenic entered the groundwater from the solid phase through adsorption and desorption of exchangeable arsenic and exchangeable iron, and reductive dissolution of iron or manganese oxides bound iron in the medium during riverbank filtration.

scholarly journals FORECAST ON WATER QUALITY OF TO LICH RIVER BASED BY SCENES OF HA NOI SEWERAGE PLANNING BY MODEL QUAL2K

2020 ◽  
Vol 58 (3A) ◽  
pp. 75
Author(s):  
Ha Duc Tran ◽  
Hung Viet Le ◽  
Hai Duc Minh Tran ◽  
Quyen Duc Nguyen
Keyword(s):  
Water Quality ◽  
River Water ◽  
Vital Role ◽  
Red River ◽  
National Standard ◽  
National Regulation ◽  
Untreated Wastewater ◽  
Appropriate Treatment ◽  
Landscape Distribution

To Lich River is well-known as a main drainage river and plays a vital role to the landscape distribution of Hanoi city, which is currently polluted due to improperly untreated wastewater flow. Thanks to QUAL2K model, the variation of river water quality has been forecasted by 4 particular scenarios. For the first scenario, the whole generated wastewater along To Lich River is not totally collected and treated. For the second one, it occurs as the former one with an addition of diluted water of 5m3/s from Red river. Next, wastewater is mostly well managed but minor sources are not collected. Finally, the whole generated wastewater is properly treated and added with a diluted amount of 5m3/s from Red river. The study indicated that in order to meet standard of column B1, QCVN 08-MT:2015/BTNMT (Vietnam National Regulation), centralized and decentralized generated sewerage is required the appropriate treatment to reach column B National Standard 02:2014/BTNMT, with the BOD5 is lower than 20 mg/L before discharging into the nature.

scholarly journals Transitions in diatom assemblages and pigments through dry and wet season conditions in the Red River, Hanoi (Vietnam)

2019 ◽  
Vol 152 (2) ◽  
pp. 163-177 ◽  
Author(s):  
Thi Thuy Duong ◽  
Hai Yen Nguyen ◽  
Thi Phuong Quynh Le ◽  
Trung Kien Nguyen ◽  
Thi Thu Huong Tran ◽  
...  
Keyword(s):  
Water Quality ◽  
River Water ◽  
Chlorophyll A ◽  
Suspended Solids ◽  
Light Availability ◽  
Red River ◽  
Artificial Substrates ◽  
Tropical Rivers ◽  
Wet Season ◽  
Hydrological Change

Background and aims – Biomonitoring is an important tool for assessing river water quality, but is not routinely applied in tropical rivers. Marked hydrological changes can occur between wet and dry season conditions in the tropics. Thus, a prerequisite for ecological assessment is that the influence of ‘natural’ hydrological change on biota can be distinguished from variability driven by water quality parameters of interest. Here we aimed to (a) assess seasonal changes in water quality, diatoms and algal assemblages from river phytoplankton and artificial substrates through the dry-wet season transition (February–July 2018) in the Red River close to Hanoi and (b) evaluate the potential for microscopic counts and high-performance liquid chromatography (HPLC) analysis of chlorophyll and carotenoid pigments for biomonitoring in large tropical rivers. Methods – River water (phytoplankton) and biofilms grown on artificial glass substrates were sampled monthly through the dry (February–April) to wet (May–August) season transition and analysed via microscopic and HPLC techniques. Key results – All phototrophic communities shifted markedly between the dry and wet seasons. Phytoplankton concentrations were low (c. thousands of cells/mL) and declined as the wet season progressed. The dominant phytoplankton taxa were centric diatoms (Aulacoseira granulata and Aulacoseira distans) and chlorophytes (Scenedesmus and Pediastrum spp.), with chlorophytes becoming more dominant in the wet season. Biofilm diatoms were dominated by Melosira varians, and areal densities declined in the wet season when fast-growing pioneer diatom taxa (e.g. Achnanthidium minutissimum, Planothidium lanceolatum) and non-degraded Chlorophyll a concentrations increased, suggesting active phytobenthos growth in response to scour damage. Otherwise, a-phorbins were very abundant in river seston and biofilms indicating in situ Chlorophyll a degradation which may be typical of tropical river environments. The very large range of total suspended solids (reaching > 120 mg/L) and turbidity appears to be a key driver of photoautotrophs through control of light availability. Conclusions – Hydrological change and associated turbidity conditions exceed nutrient influences on photoautotrophs at inter-seasonal scales in this part of the Red River. Inter-seasonal differences might be a useful measure for biomonitoring to help track how changes in suspended solids, a major water quality issue in tropical rivers, interact with other variables of interest.

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