scholarly journals The provenance of deep groundwater and its relation to arsenic distribution in the northwestern Hetao Basin, Inner Mongolia

2019 ◽  
Vol 98 ◽  
pp. 09015
Author(s):  
Shuai Liu ◽  
Huaming Guo ◽  
Hai Lu ◽  
Zhuo Zhang ◽  
Weiguang Zhao
Keyword(s):  
Vertical Mixing ◽  
Shallow Groundwater ◽  
Alluvial Fans ◽  
Deep Groundwater ◽  
Incongruent Dissolution ◽  
Deep Aquifer ◽  
Flow Paths ◽  
Arsenic Distribution ◽  
Fissure Water ◽  
High Arsenic

High arsenic (As) groundwater has been found in deep aquifer of the northwestern Hetao Basin. Little is known about the source of high As deep groundwater and its role in As distribution. Based on strontium (Sr) isotopes, this study aims to investigate the provenance of high arsenic deep groundwater (DGW). 87Sr/86Sr in DGW gradually decreased from the alluvial fans to the flat plain. Results show that fissure water, plagioclase dissolution, and shallow groundwater (SGW) controlled the 87Sr/86Sr variation. Although the reductive dissolution of As-containing iron oxide controlled the As mobilization, the leaching of phyllite and meta-basalt, incongruent dissolution of plagioclase, and vertical mixing with SGW also played an important role in increasing As concentrations in DGW approximately along the flow paths.

scholarly journals Hydrogeological Classification and the Correlation of Groundwater Chemistry with Basin Flow in the South-Western Part of Bangladesh

2018 ◽  
Vol 42 (1) ◽  
pp. 41-54 ◽  
Author(s):  
Shahpara Sheikh Dola ◽  
Khairul Bahsar ◽  
Mazeda Islam ◽  
Md Mizanur Rahman Sarker
Keyword(s):  
Groundwater Flow ◽  
Water Chemistry ◽  
Sea Water ◽  
Shallow Groundwater ◽  
Shallow Aquifer ◽  
Deep Basin ◽  
Deep Groundwater ◽  
Deep Aquifer ◽  
Delta Plain ◽  
Type Water

Attempt has been made to find the relationship between the basin groundwater flow and the current water chemistry of south-western part of Bangladesh considering their lithological distribution and aquifer condition. The correlation of water chemistry and basin groundwater flow is depicted in the conceptual model. The water-types of shallow groundwater are predominantly Mg-Na-HCO3 and Ca- Mg-Na-HCO3 type. In the deep aquifer of upper delta plain is predominately Na-Cl, Ca-HCO3 and Mg- HCO3 type. In the lower delta plain Na-Cl type of water mainly occurs in the shallow aquifer and occasionally Ca-HCO3, Ca-Mg-Na-HCO3 and Mg-HCO3 type may also occur in shallow aquifer of the eastern part of lower delta plain which could have originated from the recent recharge of rain water. Na- Cl type water is also found in the deep aquifer of lower delta plain. The origin of Na-Cl type water in the deep aquifer of lower delta part might be connate water or present day sea water intrusion. Fresh water occurring in the deep aquifer in the lower delta area is mostly of Mg-Ca-HCO3 and Na-HClO3 types. This type of water originate from intermediate or deep basin flow from the northern part of Bangladesh. The probable source of deep groundwater is Holocene marine transgression (Khan et al. 2000) occurred in 3000–7000 cal years BP and the deep groundwater of Upper Delta plain and Lower Delta plain is clearly influenced by deep basin flow coming from north part of BangladeshJournal of Bangladesh Academy of Sciences, Vol. 42, No. 1, 41-54, 2018

scholarly journals Analysis of the potential contamination risk of groundwater resources circulating in areas with anthropogenic activities

2005 ◽  
Vol 5 (1) ◽  
pp. 109-116 ◽  
Author(s):  
M. Spizzico ◽  
N. Lopez ◽  
D. Sciannamblo
Keyword(s):  
Anthropogenic Activities ◽  
Groundwater Resources ◽  
Shallow Groundwater ◽  
Deep Groundwater ◽  
Deep Aquifer ◽  
Eastern Area ◽  
Contamination Risk ◽  
Basement Rocks ◽  
Geological Features ◽  
Nitrate And Nitrite

Abstract. The area investigated is located in the province of Brindisi (Italy). It is a generally flat area separated from the nearby carbonatic plateau of the Murgia by quite indistinct and high fault scarps. As regards the geological features, carbonatic basement rocks and post-cretaceous terrains made up of calabrian calcarenites and middle-upper Pleistocenic marine terraced deposits can be distinguished. In the examined area there are two different hydrogeological environments. The first is represented by deep groundwater, the main groundwater resource in Apulia. The second hydrogeological environment, now of lesser importance than the deep aquifer in terms of size and use, is made up of some small shallow groundwater systems situated in post-calabrian sands and located in the eastern area. During some sampling cycles carried out in the studied area, water was withdrawn from both the deep aquifer and from the shallow groundwater. For every sample, the necessary parameters were determined for the physical and chemical characterisation of two different hydrogeological environments. Moreover, some chemical parameters indicating anthropogenic activities were determined. Analysis of the aerial distribution of the measured parameters has shown some main areas subject to different conditions of contamination risk, in accordance with the hydrogeological and geological features of the investigated area. In the south-eastern part of the investigated area, the important action performed by the surface aquifer for protecting the deep groundwater from contamination of anthropogenic origin is clear. On the other hand, in the shallow groundwater, areas of nitrate and nitrite contamination have been identified, which result from the extensive use of fertilizers.

Investigation of Groundwater Potential in Melaka District of Malaysia

2011 ◽  
Vol 243-249 ◽  
pp. 4553-4556
Author(s):  
S.M. Shirazi ◽  
Imran Hosen ◽  
Mohammad Sholichin ◽  
Shatirah Akib
Keyword(s):  
Discharge Rate ◽  
Shallow Groundwater ◽  
Pumping Test ◽  
Groundwater Potential ◽  
Peninsular Malaysia ◽  
Deep Groundwater ◽  
Deep Aquifer ◽  
Data Set ◽  
Deep Boreholes

The paper assesses groundwater quality and productivity in Melaka, Peninsular Malaysia. 238 data set shallow boreholes, 20 data set deep boreholes were collected and continuous pumping test data were used to determine productivity of the aquifers. 68 water samples were tested for water quality. The productivity of the wells and the characteristics of the aquifer were evaluated by pumping test using both the constant discharge rate and steps drawdown methods. The potential of shallow groundwater is low with average discharge <5 m3/hour. The potential of deep groundwater is high category with average discharge > 20 m3/hour. The results show that 32% (538 km2) from total area of Melaka district (1650 km2) is low potential categories, 56% (922 km2) is moderate and 12% (194 km2) is high. Based on the chemical data, the quality of deep aquifer is fresh. Therefore, it is available for drinking water with minimum treatment.

scholarly journals Chemical composition of groundwaters in the Hornsund region, southern Spitsbergen

2012 ◽  
Vol 44 (1) ◽  
pp. 117-130 ◽  
Author(s):  
Tomasz Olichwer ◽  
Robert Tarka ◽  
Magdalena Modelska
Keyword(s):  
Chemical Composition ◽  
Ion Exchange ◽  
Shallow Groundwater ◽  
Mineralogical Composition ◽  
Deep Groundwater ◽  
Exchange Processes ◽  
Groundwater Circulation ◽  
Initial Chemical Composition ◽  
The University ◽  
Intermediate System

Chemical composition of groundwaters was investigated in the region of the Hornsund fjord (southern Spitsbergen). The investigations were conducted during polar expeditions organized by the University of Wroclaw in two summer seasons of 2003 and 2006. Three zones of groundwater circulation: suprapermafrost, intrapermafrost and subpermafrost, were identified in areas of perennial permafrost in the region of Hornsund. The zone of shallow circulation occurs in non-glaciated (suprapermafrost) and subglacial areas. In this zone, the chemical composition of groundwater originates from initial chemical composition of precipitation, mineralogical composition of bedrock, oxidation of sulphides and dissolution of carbonates. The intermediate system of circulation is connected with water flow inside and below perennial permafrost (intrapermafrost and subpermafrost). In this zone, the chemical composition of groundwater is mainly controlled by dissolution of carbonates, ion exchange processes involving Ca2+ substitution by Na+, and oxidation of sulphides under oxygen-depleted conditions. The subpermafrost zone (deep groundwater circulation) occurs in deep-tectonic fractures, which are likely conduits for the descent of shallow groundwater to deeper depths. In this zone, the groundwater shows lower mineralization comparing to intrapermafrost zone and has a multi-ion nature Cl–HCO3–Na-Ca–Mg.

Seasonal dynamics of dissolved organic matter in high arsenic shallow groundwater systems

2020 ◽  
Vol 589 ◽  
pp. 125120
Author(s):  
Yijun Yang ◽  
Xiaofang Yuan ◽  
Yamin Deng ◽  
Xianjun Xie ◽  
Yiqun Gan ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Seasonal Dynamics ◽  
Shallow Groundwater ◽  
Groundwater Systems ◽  
High Arsenic

Erratum to “Effects of intensive urbanization on the intrusion of shallow groundwater into deep groundwater: Examples from Bangkok and Jakarta”

2009 ◽  
Vol 407 (9) ◽  
pp. 3209-3217 ◽  
Author(s):  
Shin-ichi Onodera ◽  
Mitsuyo Saito ◽  
Misa Sawano ◽  
Takahiro Hosono ◽  
Makoto Taniguchi ◽  
...  
Keyword(s):  
Shallow Groundwater ◽  
Deep Groundwater

scholarly journals Microbial Community in High Arsenic Shallow Groundwater Aquifers in Hetao Basin of Inner Mongolia, China

PLoS ONE ◽  
2015 ◽  
Vol 10 (5) ◽  
pp. e0125844 ◽  
Author(s):  
Ping Li ◽  
Yanhong Wang ◽  
Xinyue Dai ◽  
Rui Zhang ◽  
Zhou Jiang ◽  
...  
Keyword(s):  
Microbial Community ◽  
Inner Mongolia ◽  
Shallow Groundwater ◽  
Groundwater Aquifers ◽  
High Arsenic

Groundwater recharge in an endoreic basin with reclaimed municipal wastewater

2007 ◽  
Vol 55 (1-2) ◽  
pp. 449-457 ◽  
Author(s):  
G. De Feo ◽  
M. Galasso ◽  
V. Belgiorno
Keyword(s):  
Drinking Water ◽  
Water Table ◽  
Municipal Wastewater ◽  
Karst Aquifer ◽  
Wastewater Reuse ◽  
Shallow Groundwater ◽  
Agricultural Practice ◽  
Reclaimed Wastewater ◽  
Research Activity ◽  
Deep Groundwater

The aim of this paper was to evaluate the groundwater pollution in an endoreic basin in southern Italy. The aquifer circulation was carried out on two different levels: a shallow groundwater, with a water table of about 10 m, and a deep groundwater in a karst aquifer, with a water table of 140–190 m. Reclaimed municipal wastewater and superficial water collected in the catchment area were both drained in a swallow hole linked with the deep groundwater. The agricultural practice conducted in the endoreic basin produced an excess of nitrate in the soil. Nitrate was subsequently washed out and displaced in the groundwater. With regard to the EU Drinking Water Directive (98/83/EC), the research activity conducted during 2003 showed the absence of pollution in the deep groundwater used for drinking water supply. The shallow groundwater, instead, was strongly influenced by agricultural and pasture activities, with detectable levels of nitrates and bacteria. In order to reduce the load of pollution entering the swallow hole and then in the deep groundwater, the realisation of a constructed wetland plant was proposed to improve the quality of reclaimed wastewater, as well as to pursue the wastewater reuse in agriculture.

scholarly journals Understanding wetland sub-surface hydrology using geologic and isotopic signatures

2009 ◽  
Vol 13 (7) ◽  
pp. 1313-1323 ◽  
Author(s):  
P. K. Sikdar ◽  
P. Sahu
Keyword(s):  
Surface Water ◽  
Urban Areas ◽  
Isotope Composition ◽  
Operation Time ◽  
Freshwater Wetland ◽  
Bengal Basin ◽  
Silty Clay ◽  
Deep Groundwater ◽  
Deep Aquifer ◽  
Deep Aquifers

Abstract. This paper attempts to utilize hydrogeology and isotope composition of groundwater to understand the present hydrological processes prevalent in a freshwater wetland, source of wetland groundwater, surface water/groundwater interaction and mixing of groundwater of various depth zones in the aquifer. This study considers East Calcutta Wetlands (ECW) – a freshwater peri-urban inland wetland ecosystem located at the lower part of the deltaic alluvial plain of South Bengal Basin and east of Kolkata city. This wetland is well known over the world for its resource recovery systems, developed by local people through ages, using wastewater of the city. Geological investigations reveal that the sub-surface geology is completely blanketed by the Quaternary sediments comprising a succession of silty clay, sand of various grades and sand mixed with occasional gravels and thin intercalations of silty clay. At few places the top silty clay layer is absent due to scouring action of past channels. In these areas sand is present throughout the geological column and the areas are vulnerable to groundwater pollution. Groundwater mainly flows from east to west and is being over-extracted to the tune of 65×103 m3/day. δ18O and δD values of shallow and deep groundwater are similar indicating resemblance in hydrostratigraphy and climate of the recharge areas. Groundwater originates mainly from monsoonal rain with some evaporation prior to or during infiltration and partly from bottom of ponds, canals and infiltration of groundwater withdrawn for irrigation. Relatively high tritium content of the shallow groundwater indicates local recharge, while the deep groundwater with very low tritium is recharged mainly from distant areas. At places the deep aquifer has relatively high tritium, indicating mixing of groundwater of shallow and deep aquifers. Metals such as copper, lead, arsenic, cadmium, aluminium, nickel and chromium are also present in groundwater of various depths. Therefore, aquifers of wetland and surrounding urban areas which are heavily dependent on groundwater are vulnerable to pollution. In the area south of ECW isotope data indicates no interaction between shallow and deep aquifer and hence this area may be a better location to treat sewage water than within ECW. To reduce the threat of pollution in ECW's aquifer, surface water-groundwater interaction should be minimized by regulating tubewell operation time, introducing treated surface water supply system and artificial recharging of the aquifer.

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