Study on assessment of water system health in Heihe River Basin based on the game theory

Ecological Indicators, Journal Year: 2025, Volume and Issue: 174, P. 113449 - 113449

Published: April 11, 2025

Language: Английский

Assessing Drainage Infrastructure in Coastal Lowlands: Challenges, Design Choices, and Environmental and Urban Impacts

Infrastructures, Journal Year: 2025, Volume and Issue: 10(5), P. 103 - 103

Published: April 22, 2025

Urban flooding is a growing concern, particularly in coastal lowland cities where climate change exacerbates hazards through rising sea levels and intense rainfall. Traditional flood defenses like fluvial polders often exacerbate urban fragmentation maintenance costs if poorly integrated into planning. This study proposes multifunctional assessment design framework to evaluate polder effectiveness considering both the hydraulic social–environmental dimensions, emphasizing blue–green infrastructure (BGI) for control, leisure, landscape integration. Three scenarios Rio de Janeiro’s Jardim Maravilha neighborhood were modeled hydrodynamically: S1 (dike near areas, pump-dependent) S2/S3 (dikes along riverbank, gravity-driven). Results show outperformed storage capacity (2.7× larger volume), freeboard resilience (0.42–0.43 m vs. 0.25 m), integration (floodable parks accessible communities), though had faster reservoir emptying. Under change, all sustained functionality, but S1’s reduced by 86%, nearing its limit. The framework’s standardized scoring system balanced quantitative qualitative criteria, revealing trade-offs between efficiency adaptability. optimized S3 design, incorporating external dredging, achieved best compromise. approach aids decision-making systematically evaluating resilience, operational feasibility, long-term adaptation, supporting sustainable cities.

Language: Английский

Water purification plant promotes the increase of river network water quality

E3S Web of Conferences, Journal Year: 2025, Volume and Issue: 628, P. 02021 - 02021

Published: Jan. 1, 2025

This study investigates the potential of integrating Water Purification Plant (WPP) with Ecological Supplement (EWS) to improve urban river network water quality. The Tianjin Haihe River is used assess effects various quality improvement scenarios, focusing on three key indicators: TP, NH 3 -N and COD. Study results demonstrate that WPP significantly reduces pollution. For standards (Class V), compliance rates for COD, -N, TP increasing from 44.63%, 65.16%, 60.51% under no management 64.38%, 93.10%, 74.24%, respectively, when operates independently. integration EWS further improves compliance, reaching 79.66%, 96.92%, 98.12% in scenario 5.6 million tons treatment, 93.88%, 99.22%, 100.00% 28 EWS. result shows Scenario optimal scheme, which combines 20 EWS, a total operating cost 32.2 yuan per year.

Language: Английский