Study on potential groundwater yield zone in sandstone aquifer based on a dual dynamic variable weight model: A case study in Shuangma Coal Mine of Ordos Basin DOI Creative Commons
Yongjie Li, Huiyong Yin,

Fangying Dong

et al.

Ecological Indicators, Journal Year: 2023, Volume and Issue: 155, P. 111059 - 111059

Published: Oct. 9, 2023

Accurate and effective assessment of groundwater potential in aquifers hundreds meters deep remains a major challenge mining environmental protection. We analyzed the interaction mechanism hydrogeological parameters, quantified it incorporated into variable weight model (VWM) for secondary optimization, constructed dual dynamic (PE-HVWM) that varies with multi-parameter entanglement single-parameter state values to characterize potential. Then, pumping test data measured at site were used compare analyze results different predictions, optimized was validated tested using Receiver Operating Curve (ROC) method sensitivity analysis, which showed PE-HVWM has fairly high accuracy prediction (AUC = 0.874). The can visualize intrinsic correlation between respond sensitively sudden changes value parameter aquifer, output are more line actual situation after self-balancing by linking other parameters.

Language: Английский

A deep learning model with spatio-temporal graph convolutional networks for river water quality prediction DOI Creative Commons
Juan Huan, Wenjie Liao, Yongchun Zheng

et al.

Water Science & Technology Water Supply, Journal Year: 2023, Volume and Issue: 23(7), P. 2940 - 2957

Published: July 1, 2023

Abstract High-precision water quality prediction plays a vital role in preventing and controlling river pollution. However, water's highly nonlinear complex spatio-temporal dependencies pose significant challenges to tasks. In order capture the spatial temporal characteristics of data simultaneously, this paper combines deep learning algorithms for network area Jiangnan Plain, China. A method based on graph convolutional (GCN) long short-term memory neural (LSTM), namely model (ST-GCN), is proposed. Specifically, constructed correlation between stations, features are extracted using GCN, obtained by integrating LSTM. The was evaluated R2, MAE, RMSE, experimental results were 0.977, 0.238, 0.291, respectively. Compared with traditional models, ST-GCN has significantly improved accuracy, better stability, generalization ability.

Language: Английский

Citations

9
Seasonal variations and health risk assessment of microbial contaminations of groundwater in selected coastal communities of Ghana DOI Creative Commons
Emuobonuvie G. Ayeta, Levi Yafetto, George Lutterodt

et al.

Heliyon, Journal Year: 2023, Volume and Issue: 9(8), P. e18761 - e18761

Published: July 27, 2023

This study investigated seasonal variations in microbial contaminations of groundwater and associated health risks four coastal communities (Essiama, Winneba, Accra, Keta) Ghana. Membrane filtration methods, sanitary risk inspection, quantitative assessment were employed, respectively, to (i) quantify bacteriological quality, (ii) identify contamination, (iii) assess with Escherichia coli groundwater. Results showed 70.00%, 53.33%, 70.37% 90.00% sources Essiama, Keta, at intermediate risk, whereas 3.33%, 40.00%, 14.81%, high risk. Very high-risk levels contamination recorded only Accra. The presence animal wastes within a 10 m radius collection point, bad drainage systems, spilt water apron area, the use ropes buckets when fetching groundwater, absence aprons well covers put more than 60.00% points two or locations contaminations. Assessment quality indicated that mean total coliforms E. ranged, between 123.40-501.30 30.98-141.90 CFU/100 ml for communities; highest counts dry wet seasons occurred Winneba respectively. Seasonal Accra significantly higher season season; Essiama Keta no significant variations. Exposure O157:H7 through drinking ranged 5 23 cells per day. Although exposure bathing was less 1 cell day all communities, residents exposed one coli, least, every 62, 141, 237, 282 days infection illness drinking, from 0.57 0.98. estimated Disability-Adjusted Life Years (DALY) exceeded WHO-acceptable DALY. These findings show resources selected prone contaminations, this may be setback Sustainable Development Goals 6. Implications are discussed.

Language: Английский

Citations

9
Response of total suspended matter to natural and anthropogenic factors since 1990 in China's large lakes DOI
Hui Tao, Kaishan Song, Ge Liu

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 892, P. 164474 - 164474

Published: June 1, 2023

Language: Английский

Citations

8
Identification of groundwater potential zones of Alappuzha (Kerala) in South India integrating AHP and GIS DOI

S. Selvam,

Akhila V. Nath, Priyadarsi D. Roy

et al.

Environment Development and Sustainability, Journal Year: 2024, Volume and Issue: unknown

Published: May 7, 2024

Language: Английский

Citations

3
Spatial assessment of groundwater potential zones using remote sensing, GIS and analytical hierarchy process: A case study of Siliguri subdivision, West Bengal DOI
Pritam Saha, Saumyajit Ghosh, Shasanka Kumar Gayen

et al.

Applied Geomatics, Journal Year: 2024, Volume and Issue: 16(3), P. 751 - 778

Published: July 19, 2024

Language: Английский

Citations

3
Comparative Study of Geospatial Techniques for Interpolating Groundwater Quality Data in Agricultural Areas of Punjab, Pakistan DOI Open Access
Muhammad Tayyab, Rana Ammar Aslam, Umar Farooq

et al.

Water, Journal Year: 2023, Volume and Issue: 16(1), P. 139 - 139

Published: Dec. 29, 2023

Groundwater Arsenic (As) data are often sparse and location-specific, making them insufficient to represent the heterogeneity in groundwater quality status at unsampled locations. Interpolation techniques have been used map As However, results obtained from these affected by various inherent external factors, which lead uncertainties interpolated data. This study was designed determine best technique interpolate We selected ten interpolation predict concentration resources of Punjab, Pakistan. Two spatial extent area density, were considered assess their impact on performance techniques. Our show that Inverse Distance Weighting (IDW) Spline demonstrate highest accuracy with lowest RMSE (13.5 ppb 16.7 ppb) MAE (87.8 89.5 ppb), respectively, while Natural Neighbor shows (2508.7 (712.1 When area’s modified, IDW showed performance, errors within ±1.5 for 95% wells across area. While density has a positive correlation among all techniques, remained method interpolation. It is therefore concluded should be when observed randomly distributed. The utilization can useful monitoring management resources.

Language: Английский

Citations

8
Spatial variability of arsenic fractionation in an abandoned arsenic-containing mine: Insights into soil particle sizes and quantitative mineralogical analysis DOI

Hongzhen Ran,

Zhaohui Guo,

Liwen Yi

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 889, P. 164145 - 164145

Published: May 18, 2023

Language: Английский

Citations

7
Enhanced Methods for Evaluating Water-inrush Risk from Underlying Aquifers: Incorporating Dynamic Weight Theory and Uncertainty Analysis Model DOI
N. Li, Wenfeng Du

Water Resources Management, Journal Year: 2024, Volume and Issue: 38(12), P. 4615 - 4631

Published: May 20, 2024

Language: Английский

Citations

2
Assessment of irrigation suitability of water in Hirakud reservoir and Bargarh main canal, Odisha, India: A multivariate analysis DOI Creative Commons

Syed Nikhat Ahmed,

Sawan Kumar Sahoo,

Iswar Baitharu

et al.

Water Science & Technology Water Supply, Journal Year: 2024, Volume and Issue: 24(6), P. 2009 - 2023

Published: May 30, 2024

ABSTRACT The present study assesses the chemical characteristics and irrigation suitability of water in Hirakud reservoir main canal. Water samples were collected from 10 different sites during premonsoon, monsoon, postmonsoon seasons. pH, EC, TDS, major ions, trace metals estimated using standard methods. pH was slightly alkaline a few sites. concentration all ions below permissible limit except for K+. cations anions order Ca2+ > Na+ >Mg2+ K+ HCO3− Cl− SO42− NO3− respectively. Piper's trilinear diagram revealed that Mg-HCO3− mixed type. A strong correlation Cl– with other suggested precipitation dominance hydrogeochemistry water. above across season. Although excellent category as per EC SAR, RSC remained PCA anthropogenic geogenic processes regulate quality reservoir. work provides baseline management policy well command area.

Language: Английский

Citations

2
Microbial water quality of pond Alleben (Gaziantep, Turkey) in winter and climatic changes in the region DOI Creative Commons
Hatice Aysun MERCİMEK TAKCI, Cevher Karaca,

Esen Sarigullu Onalan

et al.

Journal of Water and Climate Change, Journal Year: 2023, Volume and Issue: 14(6), P. 2042 - 2053

Published: May 31, 2023

Abstract This study assessed the microbial quality of water sources in winter by microbiological methods and molecular-based quantitative polymerase chain reaction (qPCR) potential future bacterial loads Alleben pond based on increase temperature. Total bacteria, total coliform, Escherichia coli levels using qPCR were significantly higher samples than those enumerated culture-dependent methods. These results showed that our approach is suitable to estimate relative abundances uncultured cultured indicator microorganisms affected characteristics. Based climate data, daily average rate 1.8 °C/increase associated with air temperature for was recorded. As a result warming surface, thresholds may breach and, thus, physicochemical biological properties change increasing growth rates. first analysis apply combined molecular approaches better understand how concentrations aquatic environments variations Gaziantep region. indicates developing surface treatment measures adaptation strategies reduce contamination pond.

Language: Английский

Citations

6