Study of the allocation strategy of water pollutant emission permits under a bidirectional ecological compensation mechanism

Ecological Indicators, Journal Year: 2023, Volume and Issue: 154, P. 110849 - 110849

Published: Aug. 29, 2023

Water pollutant emission permits (WPEPs) allocation is a competing limited consumption resource designed to address the issue of reconciling water pollution with economic development. In wake increasing conflicts, pressing challenge how motivate stakeholders associated basin establish balance between development and environmental preservation. Based on unidirectional flow pollution, this study established bidirectional ecological compensation (BEC) mechanism, which incorporated key indicators (WPEPs volume) into BEC mechanism. By integrating mechanism WPEPs model, multi-objective optimization framework for balancing fairness efficiency under synergy has been proposed. The Tuojiang river in China was selected study, results mechanisms different preferences were analyzed verify validity practicality model. Results revealed that (1) can be considered ensure equitable efficient basin. (2) Under perspective watershed cooperation, proves an effective measure promote protection watershed. (3) Preferences managers have impact outcomes mechanisms. This provides reference management adoption optimal strategy synergistic

Language: Английский

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Designing an explainable bio-inspired model for suspended sediment load estimation: eXtreme Gradient Boosting coupled with Marine Predators Algorithm

Engineering Applications of Computational Fluid Mechanics, Journal Year: 2024, Volume and Issue: 18(1)

Published: Aug. 20, 2024

This study aimed to develop an accurate and reliable model for predicting suspended sediment load (SL) in river systems, which is crucial water resource management environmental protection. While Xtreme Gradient Boosting (XGB), a powerful ensemble machine learning (ML) model, has been employed previous studies, the novelty of this research lies introduction hybrid approach that synergistically combines XGB with bio-inspired Marine Predators Algorithm (XGB-MPA) estimate SL Yeşilirmak River (Turkey). To end, streamflow (Q) concentration (SC) values as well their lag times (1 3 month times) were fed input variables – under 9 scenarios into ML models. A time series datasets from March 1973 December 2011 January 2012 2023 used training testing models, respectively. The superiority proposed compared two other including XGB-PSO (Particle Swarm Optimization) XGB-GWO (Grey Wolf was also investigated. According results, simultaneous application Q SC inputs led best estimates by XGB-MPA, XGB-MPA9 (RMSE = 103.7 ton/day; NSE 0.96) exhibiting lowest error rates. In addition, XGB-MPA performed better than all scenarios, highest reduction RMSE being 19.3% (scenario 5) 97.4% 1), When comparing performance MAE, 40.94, 0.96, respectively, comparison 816.02, 1063.74 −2.94 693.16, 981.68 −2.37 XGB-GWO. Further can include use efficient extracted satellite images (e.g. land cover, morphology, etc.) inputs.

Language: Английский

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High lability of global niche and range in the Giant African Snail (Lissachatina fulica): Small niche expansions resulting in large range shifts

Ecological Indicators, Journal Year: 2023, Volume and Issue: 151, P. 110328 - 110328

Published: May 8, 2023

As a major source of global change, biological invasions have received increasing attention in past decades. Niche and range dynamics alien invasive species provide essential evidence for understanding mechanisms underlying invasions. However, to our knowledge few relevant studies on mollusks been reported. Here, from the perspective climatic suitability, we investigated niche shifts Giant African Snail (Lissachatina fulica), one world's most mollusks. We observed that, compared with its native counterpart, this snail could survive environments wider temperature ranges. The showed breadth larger potential than occupied different positions, indicating high lability terms range. This did not conform conservatism hypotheses, probably due influence human introductions releasing. Given that large size can result small expansions, making more important indicator invasion assessments shifts. While show low space, highly labile was Snail, strategies prevent by mollusk should be prioritized. Our study, certain extent, further between their counterparts.

Language: Английский

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Mask R-CNN–Based Landslide Hazard Identification for 22.6 Extreme Rainfall Induced Landslides in the Beijiang River Basin, China

Remote Sensing, Journal Year: 2023, Volume and Issue: 15(20), P. 4898 - 4898

Published: Oct. 10, 2023

Landslides triggered by extreme precipitation events pose a significant threat to human life and property in mountainous regions. Therefore, accurate identification of landslide locations is crucial for effective prevention mitigation strategies. During the prolonged heavy rainfall Guangdong Province between 21 May June 2022, shallow clustered landslides occurred regions Beijiang River Basin. This research used high-resolution satellite imagery integrated Mask R-CNN algorithm model with spectral, textural, morphological physical characteristics remote sensing imagery, addition landslide-influencing factors other constraints, interpret induced event through techniques. The detection results show that proposed methodology achieved high level accuracy identification, precision rate 81.91%, recall 84.07% an overall 87.28%. A total 3782 were detected, showing distinct distribution pattern. performance R-CNN, Faster-CNN, U-Net YOLOv3 models was further compared, effects setting rotation angle constraints on investigated. each improves evaluation indices, but has best performance; can effectively improve generalization ability robustness model, landslide-inducing factor data texture feature sample are identification. provide valuable references technical support deepening our understanding patterns rainfall-triggered cluster

Language: Английский

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Magnetic and grain-size properties of the Weihe River sediments reveal runoff changes in the Holocene

Journal of Water and Climate Change, Journal Year: 2023, Volume and Issue: 14(5), P. 1620 - 1637

Published: April 28, 2023

Abstract Detailed and systematic analyses of the magnetic grain-size properties Weihe River sediments were conducted to explore effective proxies that could reflect variations in runoff. Ultimately, parameter χARM/χlf was considered a reliable proxy owing close relationship with fraction larger than 63 μm, correlation coefficient 0.90. By combining accelerator mass spectrometry radiocarbon (AMS 14C) dating, timescale ranging from 12,900 year BP present established for section. Accordingly, reconstructed runoff showed that, 9,600 BP, hydrodynamic force river relatively strong, large. From 7,500 these two parameters varied weak trend continued increase 5,300 BP. At shifted fluvial continental environment, indicating marked decrease Although resolution pattern this reconstruction rough, is significant analysis among historical studies based on floodplain sediments, results trends some extent coincide intensity East Asian Summer Monsoon.

Language: Английский

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