Modeling Extreme Management of Saline Water Dilution in the Ingulets River Basin

2021 ◽  
Author(s):  
Pavlo Kovalchuk ◽  
Volodymyr Kovalchuk ◽  
Olena Demchuk ◽  
Viacheslav Stetsenko ◽  
Hanna Balykhina
Keyword(s):  
River Basin ◽  
Saline Water ◽  
Water Dilution

scholarly journals Hydro-Geophysical Study for Well Design in Lower Reaches of Kasai River Basin, Eastern India

2022 ◽  
Author(s):  
Ranjan Sinha ◽  
Shalivahan Shrivastava
Keyword(s):  
River Basin ◽  
Saline Water ◽  
Research Work ◽  
Vital Role ◽  
Scientific Management ◽  
Water Interface ◽  
Eastern India ◽  
Groundwater Abstraction ◽  
Well Design ◽  
Water Wells

Abstract Saltwater intrusion and up coning in coastal aquifer is a common phenomenon brought either due to flow of seawater into freshwater aquifer originally caused by groundwater abstraction near the coast or due to wrong casing design of water wells. This necessitates a study of aquifer disposition along with demarcation of fresh water saline water interface of Kasai River basin, Eastern India to determine the depth to freshwater and recommend the borehole design. In this study geophysical and hydrogeological techniques were employed to map to demarcate fresh and saline water interface. The phenomenon of saline water up coning is also noticed and accordingly water wells have been designed. For the said study, twenty two geophysical logs, sixty five lithological logs and hydrogeological data of eighty eight sites spread across Kasai River basin were utilized. The study shows that there are three regional aquifers exist in the area. It is recommended that water wells in the study area is to be constructed with artificial gravel packing of size 2-3mm and screen slot size is suggested to be 1.2mm. Since the sites are affected with saline water, hence isolation of zone is mandatory with proper cementing material or packer. This research work is able to develop a design model for the boreholes located in the area. The work as a whole will serve as a vital role in scientific management of groundwater resource and enable the rational planning in coastal aquifers so as to avoid fresh and saline water intermixing and up-coning.

scholarly journals Epipelic cyanobacterial diversity in Pinang River basin, Malaysia, revealed by 16S-based metagenomic approach

Algologia ◽  
2021 ◽  
Vol 31 (1) ◽  
pp. 93-113
Author(s):  
A.R. Nur Fadzliana ◽  
◽  
W.O. Wan Maznah ◽  
S.A.M. Nor ◽  
Choon Pin Foong ◽  
...  
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
River Basin ◽  
Sequence Data ◽  
Diversity Index ◽  
Saline Water ◽  
Illumina Miseq ◽  
Rrna Gene ◽  
Cyanobacterial Community ◽  
Upstream Station

Cyanobacteria are the most widespread group of photosynthetic prokaryotes. They are primary producers in a wide variety of habitats and are able to thrive in harsh environments, including polluted waters; therefore, this study was conducted to explore the cyanobacterial populations inhabiting river tributaries with different levels of pollution. Sediment samples (epipelon) were collected from selected tributaries of the Pinang River basin. Air Terjun (T1) and Air Itam rivers (T2) represent the upper streams of Pinang River basin, while Dondang (T3) and Jelutong rivers (T4) are located at in the middle of the river basin. The Pinang River (T5) is located near the estuary and is subjected to saline water intrusion during high tides. Cyanobacterial community was determined by identifying the taxa via 16S rRNA gene amplicon sequence data. 16S rRNA gene amplicons generated from collected samples were sequenced using illumina Miseq, with the targeted V3 and V4 regions yielding approximately 1 mln reads per sample. Synechococcus, Phormidium, Arthronema and Leptolyngbya were found in all samples. Shannon-Weiner diversity index was highest (H’ = 1.867) at the clean upstream station (T1), while the moderately polluted stream (T3) recorded the lowest diversity (H’ = 0.399), and relatively polluted stations (T4 and T5) recorded fairly high values of H’. This study provides insights into the cyanobacterial community structure in Pinang River basin via cultivation-independent techniques using 16S rRNA gene amplicon sequence. Occurrence of some morphospecies at specific locations showed that the cyanobacterial communities are quite distinct and have specific ecological demands. Some species which were ubiquitous might be able to tolerate varied environmental conditions.

Sustainable Strategies and Status of Unconventional Water Resources Development and Utilization in Manas River Basin

2010 ◽  
Vol 113-116 ◽  
pp. 565-570 ◽  
Author(s):  
Zhen Hua Wang ◽  
Xin Lin He ◽  
Guang Yang ◽  
Sha Li
Keyword(s):  
Water Resources ◽  
River Basin ◽  
Agricultural Development ◽  
Saline Water ◽  
Salt Water ◽  
Scientific Development ◽  
Return Flow ◽  
Exploitation And Utilization ◽  
Manas River Basin ◽  
Development And Utilization

Because of the Lack of water resources and the increasing water quantity used in living and production, the water resources are becoming the restrictive factor of regional economic and social development in in Manas river basin. The exploitation and utilization of conventional water resources has reached more than 95% in the basin,it caused great attention that the development and utilization of non-conventional water resources for agricultural development and ecological environment construction. At present, the exploitation and utilization of the non-conventional water resources(shallow underground salt water，saline water) for agriculture and forestry has become more and more widespread and in-depth. because of the lack of scientific instruction and reasonable exploitation, which not only caused water level falling, leading to degradation of the brittle natural entironment, but also caused SBHCSS and the decline in productivity. With the analysis of the non-conventional water resources actual exploitation and utilization, under the scientific development concept, the aryicle puts forward the sustained strategies of non-conventional underground water resources (salt water, saline water) reasonable exploitation and the irrigation return flow reuse efficient exploitation which is used for ecological restoration and reconstruction.

scholarly journals Studies on saline water intrusion in the coastal stretch of Kadalundi river basin, Malappuram district, Kerala using visual MODFLOW – A case study.

2020 ◽  
Author(s):  
Sajeena S ◽  
Swathy P.S ◽  
Abdul Hakkim V. M.
Keyword(s):  
Ground Water ◽  
Contaminant Transport ◽  
Fresh Water ◽  
River Basin ◽  
Saline Water ◽  
Quality Data ◽  
Visual Modflow ◽  
Water Quality Data ◽  
Saline Water Intrusion ◽  
Water Intrusion

Abstract The study on simulation of sea water intrusion into the coastal aquifers using Visual MODFLOW was conducted on coastal stretch of Tanur, Tirurangadi and Parappanagadi blocks of the Kadalundi river basin and this area comprises of about 130 km2 drainage area. The base map of the study area was imported into the model in BMP format and divided into 40 columns and 40 rows (1600 cells). Water level and water quality data of observation wells maintainedby Ground Water Department, Govt. of Kerala was used as input to the model. Secondary data on hydrogeological parameters and aquifer properties were also used as the input parameters of the model. In this study, Visual MODFLOW 2.8.1 integrated with MT3D software was used for groundwater modelling and contaminant transport modelling. It was observed that there is a chance of saline water intrusion in the coastal stretch of study area. There are chances of saline water intrusion to a lateral distance of 0.5 km to 1.9 km from the coast which extents 3.2 to 4.5km along the coast from northern boundary of Kadalundi river basin. Coconut retting, lime shelling and sand mining activities in the river basin were a potential source of pollution and contaminant transport. Development of small industries, construction of buildings and agricultural activities in the coastal stretch of river basin necessitated increased rate of pumping of ground water. This increased pumping of ground water leads to the entry of salt water into the fresh water aquifer formations. Global warming and sea level rise are also threatening problems in the current climate change scenario which is also a reason for saline water intrusion in to the coastal fresh water aquifers. Groundwater replenishment through natural and artificial recharge and sustainable development activities in the area are the main countermeasures to overcome this problem.

scholarly journals Pore resistivity variation by Resistivity imaging technique in sedimentary part of main Gadilam river basin, Cuddalore District, Tamil Nadu, India

2021 ◽  
Vol 13 (1) ◽  
pp. 268-277
Author(s):  
R. Ravi ◽  
S. Aravindan ◽  
C. Ramachandran ◽  
Sanjay Kumar Balabantaray ◽  
B. Selvaraj ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
River Basin ◽  
Tamil Nadu ◽  
Saline Water ◽  
Groundwater Potential ◽  
High Resistivity ◽  
Clay Layer ◽  
Clayey Sand ◽  
Low Resistivity ◽  
Matching Techniques

Electrical resistivity is the only property of physics which give information of subsurface moisture content in the formation, Hence geophysical electrical resistivity survey was carried out to investigate the nature of shallow subsurface formations and geological contact in the main Gadilam river basin of Cuddalore District in Tamil Nadu. Twenty-seven vertical electrical soundings (VES) were conducted by Schlumberger configuration in the basin. Data is interpreted by curve matching techniques using IPI2 WIN software, layer parameters like apparent resistivity (?a) and thickness (h) interpretation were exported to Geographic Information System (GIS). Interpretation distinguishes three major geoelectric layers like topsoil, sandy clay layer, clayey sand layer along the contact zone in the basin. Interpreted VES sounding curves are mostly four-layer cases of QH, H, HA and KH type. Investigation demarcates lithology of subsurface and hydrogeological set up by employing maximum possible electrode sounding to infer saline water and freshwater occurrence based on resistivity signals. Zone of groundwater potential map was prepared with the combination of resistivity (?= ?1+ ?2+ ?3+ ?4) and corresponding thickness (T= T1+T2+T3+T4). High resistivity value of >200 ? m and low resistivity value of <10 ? m show the occurrence of alkaline and saline water within the formation aquifers as a result of possible rock water interaction and saline water dissolution. Four-layer resistivity cases from the matched curve (namely KH, AH, QA, and KA type) show the resistivity distribution/variation. It separates the freshwater depth wish from 1 to 140 ? m in fluvial sediments. Flood basin, sandstone and clay layer with low resistivity value of 3.16 - 7.5 ? m indicates contact with saline and freshwater aquifer. The Iso – resistivity map delineates saline water and freshwater zones with in the fourth layer cases in the same locations to indicate the irrational way of abstracting groundwater, resulting in saltwater ingress.

Sign in / Sign up

Export Citation Format

Share Document