Impact of inlet flow velocity on sediment reduction in pump station forebays DOI
Qiao Qiao, Haidong Wang, Lingxiao Huang

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(11)

Published: Nov. 1, 2024

Pump stations are critical for effective water management in China, particularly sediment-laden regions such as Ningxia, where vortex flow patterns forebays result sediment deposition and diminished operational efficiency. Through this research endeavor, numerical simulations engineering measurements were employed to systematically analyze the causes of adverse induced by water-sediment two-phase a sudden expansion pump station located focusing on seven cases that examined behavior concentration. Results indicate forward forebay, inflow velocity at diversion channel entrance is correlated with suspended Compared other cases, case 5 produces smaller has minimal impact pattern exhibits lowest Applying Q-criterion reveals possesses smallest structure volume. Additionally, quadratic polynomial relationship between inlet efficiency was established, further confirming accuracy 5. At an 1.065 m/s, markedly reduced strength decreased, enabling particles escape, thereby enhancing station. This study offers optimized conditions theoretical guidance high-sediment regions.

Language: Английский

Global-Scale Chlorophyll-A Monitoring for Inland Lake Water Quality Framework: Advancements, Machine Learning Models, and Transferability Challenges DOI

Aung Chit Moe,

Khim Cathleen Saddi, Ruodan Zhuang

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0
Extraction, Dynamics, and Driving Factors of Shallow Water Area in Hongze Lake Based on Landsat Imagery DOI Creative Commons

N. Liu,

Jinhui Huang, Dandan Xu

et al.

Remote Sensing, Journal Year: 2025, Volume and Issue: 17(7), P. 1128 - 1128

Published: March 21, 2025

The dynamics of shallow water areas inland lakes is closely related to the regional ecology and economy. However, it still a challenge extract natural area for using satellite images due their rapid changes various human demands. Therefore, we developed new remote sensing-based method applied in Hongze Lake (one largest freshwater China) first delineate lake from SWIR1 band Landsat OLI imagery cold spots LISA method, then distinguish deep G hot with after masking out, finally extracting by aquatic farms out farm ridge classification NDWI aggregating points ridges. results show that (1) this study efficient limited effects vegetation; (2) inflow (upstream supply precipitation) farms, two dominant factors temporal area, contributed 38.3% (positively) 42.2% (negatively) decrease during 2013–2022 Lake; (3) decreased significantly every April as paddy rice withdrew large amount irrigation Lake. Our research provides approach demonstrates upstream supply, precipitation, agriculture demands are three main reasons seasonal variations lakes.

Language: Английский

Citations

0
Retrieval of Total Suspended Matter Concentration Based on the Iterative Analysis of Multiple Equations: A Case Study of a Lake Taihu Image from the First Sustainable Development Goals Science Satellite’s Multispectral Imager for Inshore DOI Creative Commons

Xueke Hu,

Jiaguo Li, Yuan Sun

et al.

Remote Sensing, Journal Year: 2024, Volume and Issue: 16(8), P. 1385 - 1385

Published: April 14, 2024

Inland waters consist of multiple concentrations constituents, and solving the interference problem chlorophyll-a colored dissolved organic matter (CDOM) can help to accurately invert total suspended concentration (Ctsm). In this study, according characteristics Multispectral Imager for Inshore (MII) equipped with first Sustainable Development Goals Science Satellite (SDGSAT-1), an iterative inversion model was established based on analysis linear regression estimate Ctsm. The Hydrolight radiative transfer used simulate process Lake Taihu, it analyzed effect three component remote sensing reflectance. characteristic band combinations B6/3 B6/5 were determined using correlation different bands combinations. By combining two models, a complete closed Ctsm formed, which successfully verified by modeling data (R2 = 0.97, RMSE 4.89 g/m3, MAPE 11.48%) SDGSAT-1 MII image verification 0.87, 3.92 8.13%). And compared models constructed other feature published models. Remote monitoring carried out images Taihu in 2022–2023. This study serve as technical reference satellite terms Ctsm, well improving water environment.

Language: Английский

Citations

3
Changes Monitoring in Hongjiannao Lake from 1987-2023 using Google Earth Engine and Analysis of Climatic and Anthropogenic Forces DOI
Md. Enamul Huq, Xijun Wu, Akib Javed

et al.

Physics and Chemistry of the Earth Parts A/B/C, Journal Year: 2024, Volume and Issue: unknown, P. 103756 - 103756

Published: Oct. 1, 2024

Language: Английский

Citations

3
Water Quality and Pollution Source Apportionment Responses to Rainfall in Steppe Lake Estuaries: A Case Study of Hulun Lake in Northern China DOI
Bingtao Hu,

Yuhong Liu,

Zhongsheng Wang

et al.

Published: Jan. 1, 2024

Language: Английский

Citations

0
The Derivation of Seawater Quality Criteria and Ecological Risk Assessment of Ahtn DOI
Xianglei Li, Xiaohong Sun, Guangchao Li

et al.

Published: Jan. 1, 2024

Language: Английский

Citations

0
Effect of sponge city facilities on the exposure characteristics and ecological risks of antibiotics in urban inland lakes: A case study at Fuzhou, China DOI

Chengfu Li,

Ligui Wu,

Xiaoming Zou

et al.

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(47), P. 57645 - 57654

Published: Sept. 17, 2024

Language: Английский

Citations

0
Monitoring Salinity in Inner Mongolian Lakes Based on Sentinel-2 Images and Machine Learning DOI Creative Commons

Ming Hua Deng,

Ronghua Ma, Steven Loiselle

et al.

Remote Sensing, Journal Year: 2024, Volume and Issue: 16(20), P. 3881 - 3881

Published: Oct. 18, 2024

Salinity is an essential parameter for evaluating water quality and plays a crucial role in maintaining the stability of lake ecosystems, particularly arid semi-arid climates. responds to changes climate human activity, with significant impacts on ecosystem services. In this study, Sentinel-2A/B Multi-Spectral Instrument (MSI) images quasi-synchronous field data were utilized estimate salinity using machine learning approaches (i.e., XGB, CNN, DNN, RFR). Atmospheric correction MSI was tested six processors (ACOLITE, C2RCC, POLYMER, MUMM, iCOR, Sen2Cor). The most accurate model atmospheric method found be extreme gradient boosting tree combined ACOLITE algorithm. These used develop (N = 70, mean absolute percentage error 9.95%) applied eight lakes Inner Mongolia from 2016 2024. Seasonal interannual variations explored, along examination potential drivers over time. Average salinities autumn spring higher than summer. highest observed centers tended consistent homogeneous. Interannual trends evident several lakes, influenced by evaporation precipitation. Climate factors primary lakes.

Language: Английский

Citations

0
Water quality and pollution source apportionment responses to rainfall in steppe lake estuaries: A case study of Hulun Lake in northern China DOI Creative Commons
Bingtao Hu,

Yuhong Liu,

Yixue Chen

et al.

Ecological Indicators, Journal Year: 2024, Volume and Issue: 168, P. 112791 - 112791

Published: Nov. 1, 2024

Language: Английский

Citations

0
Impact of inlet flow velocity on sediment reduction in pump station forebays DOI
Qiao Qiao, Haidong Wang, Lingxiao Huang

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(11)

Published: Nov. 1, 2024

Pump stations are critical for effective water management in China, particularly sediment-laden regions such as Ningxia, where vortex flow patterns forebays result sediment deposition and diminished operational efficiency. Through this research endeavor, numerical simulations engineering measurements were employed to systematically analyze the causes of adverse induced by water-sediment two-phase a sudden expansion pump station located focusing on seven cases that examined behavior concentration. Results indicate forward forebay, inflow velocity at diversion channel entrance is correlated with suspended Compared other cases, case 5 produces smaller has minimal impact pattern exhibits lowest Applying Q-criterion reveals possesses smallest structure volume. Additionally, quadratic polynomial relationship between inlet efficiency was established, further confirming accuracy 5. At an 1.065 m/s, markedly reduced strength decreased, enabling particles escape, thereby enhancing station. This study offers optimized conditions theoretical guidance high-sediment regions.

Language: Английский

Citations

0