Determinants of people's willingness to pay to restore polluted urban rivers: The case of River Kebena, Addis Ababa

Getachew, Dagne; Gemeda, Fekede Terefe; Chemeda, Beshea Abdissa; Guta, Dawit Diriba; Tefera, Tamirat; Senbeta, Feyera

doi:10.1016/j.gsd.2021.100692

Cited by 5 publications

(2 citation statements)

References 22 publications

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“…In another study [ 60 ], examined residents’ WTP for the restoration of a polluted urban river in Addis Ababa. The respondents of the study had a positive WTP for restoring the polluted river.…”

Section: Literature Reviewmentioning

confidence: 99%

Traditional beliefs and willingness to pay for improving a mining-polluted river in Ghana

Arthur,

Vondolia,

Dasmani

2023

Heliyon

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Section: Literature Reviewmentioning

confidence: 99%

Traditional beliefs and willingness to pay for improving a mining-polluted river in Ghana

Arthur,

Vondolia,

Dasmani

2023

Heliyon

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“…The redundancy analysis (RDA) showed a positive correlation between population, industrial wastewater, domestic sewage, livestock and nitrogen pollution concentrations in the river [33]. Pollutants generated from anthropogenic sources have been causing changes in microbial community [42]. Some researchers showed consistent shifts in sediment bacterial communities in response to nitrogen pollution gradient in the east China sea [47].…”

Section: Open Accessmentioning

confidence: 99%

Pattern changes of microbial communities in urban river affected by anthropogenic activities and their environmental driving mechanisms

et al. 2022

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The microbial community structure of sediments in the Bahe River Basin, China was studied using a high-throughput sequencing platform and PCR amplification to investigate the pattern changes in microbial communities in urban rivers affected by anthropogenic activities and their environmental driving mechanisms. The results demonstrated that the average total nitrogen and total phosphorus in the sediments were 524 and 734 mg/kg, respectively. The T, COD and $${\text{NH}}_{4}^{ + }$$ NH 4 + -N of the water and the moisture content of the sediments has significantly impacted on the microbial community structure. Twenty microbial species with a relative abundance > 1% in the sediments of the river were observed, accounting for 95–99% of the total microbial community. The primary species were Proteobacteria (13.86–69.14%), Firmicutes (1.45–58.33%), Chloroflexi (3.68–26.18%), Actinobacteria (2.7–21.51%), Acidobacteria (0.73–16.36%), Bacteroides (1.53–14.11%), and Thermodesulfobacteria (0.1–8.9%), accounting for over 90% of the total microbial community. At the class level, the primary species were γ-proteobacteria, Alphaproteobacteria, Anaerolineae, Bacillus, Bacteroidota, Actinobacteriota, and Clostridia, accounting for over 70% of the total microbial community. Our results provide direct evidence for a link between microbial community structure and environment factors. This evidence demonstrates that sediment microorganisms can be applied to evaluate urban rivers pollution levels, which can provide a scientific basis for pollution control and management in the urban river affected by human activities.

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High-proportions of tailwater discharge alter microbial community composition and assembly in receiving sediments

Zhou,

Cheng,

Lian

et al. 2024

Sci Rep

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The tailwater from wastewater treatment plants serves as an important water resource in arid regions, alleviating the conflict between supply and demand. However, the effects of different tailwater discharge proportions on microbial community dynamics remain unclear. In this study, we investigated the effects of different tailwater discharge proportions on the water quality and microbial community characteristics of sediments in receiving water bodies under controlled conditions (WF-1, WF-2, WF-3, WF-4, and WF-5, containing 0% tailwater + 100% natural water, 25% tailwater + 75% natural water, 50% tailwater + 50% natural water, 75% tailwater + 25% natural water, and 100% tailwater + 0% natural water, respectively). Microbial co-occurrence networks and structural equation model were used to unveil the relationship between microbial communities and their shaping factors. Results showed that distinct microbial community compositions were found in the sediments with low- (< 50%) and high- (> 50%) proportions of tailwater. Specifically, WCHB1-41 and g_4-29–1, which are involved in organic degradation-related functions, were the key genera in the high-proportion cluster. A total of 21 taxa were more abundant in the low-proportion (< 50%) cluster than that in high-proportion (> 50%). Moreover, higher modularity was observed in the low-proportion. Total phosphorus directly affected while ammonia nitrogen indirectly affected the microbial community structure. Our findings support the distinct heterogeneity of microbial communities driven by tailwater discharge in receiving water bodies, and further confirmed that high-proportion tailwater depletes sensitive microbial communities, which may be avoided through scientific management.

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Determinants of people's willingness to pay to restore polluted urban rivers: The case of River Kebena, Addis Ababa

Cited by 5 publications

References 22 publications

Traditional beliefs and willingness to pay for improving a mining-polluted river in Ghana

Traditional beliefs and willingness to pay for improving a mining-polluted river in Ghana

Pattern changes of microbial communities in urban river affected by anthropogenic activities and their environmental driving mechanisms

High-proportions of tailwater discharge alter microbial community composition and assembly in receiving sediments

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