H2Open Journal最新文献_第5页

Distribution of multiple antibiotic-resistant Gram-negative bacteria in potable water from hand-dug wells in Iwo, Nigeria 尼日利亚Iwo手工挖井的饮用水中多种耐药革兰氏阴性细菌的分布情况

IF 2.1

H2Open Journal Pub Date : 2023-02-07 DOI: 10.2166/h2oj.2023.043

B. Atobatele, A. Owoseni

{"title":"Distribution of multiple antibiotic-resistant Gram-negative bacteria in potable water from hand-dug wells in Iwo, Nigeria","authors":"B. Atobatele, A. Owoseni","doi":"10.2166/h2oj.2023.043","DOIUrl":"https://doi.org/10.2166/h2oj.2023.043","url":null,"abstract":"\u0000 The provision of potable water is a global challenge. Infections caused by drinking contaminated water are a regular occurrence in developing countries. This study was carried out to determine Gram-negative bacterial distribution and antibiotic resistance in potable water from hand-dug wells within Iwo, Nigeria. Thirty hand-dug wells were randomly selected within Iwo for sampling carried out between October and December 2018. Bacteria identification was carried out using standard methods. The most probable number (MPN) and antibiotic resistance profile as well as Multiple Antibiotic Resistance Index (MARI) for these isolates were determined in addition to studying their haemolysis patterns on blood agar. Results showed that all the water samples from these hand-dug wells were highly contaminated. The highest value >1,100+ was recorded for 21 samples. In addition, 11 genera of bacteria were isolated: Citrobacter, Enterobacter, Escherichia, Klebsiella, Morganella, Neisseria, Proteus, Providencia, Salmonella, Serratia and Pseudomonas. Antibiotic resistance to cefixime and cefuroxime were 92.6 and 90.9%, respectively. One hundred and sixty-nine (96.6%) isolates had a MARI greater than 0.2 and all showed haemolysis. Ingestion of this contaminated water has major public health implications. Hence, it is advisable that every individual should embark on in-house water treatment to avoid water-borne diseases.","PeriodicalId":36060,"journal":{"name":"H2Open Journal","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46444155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Towards a risk ranking for improved management of discharges of fats, oils, and greases (FOGs) from food outlets 制定风险排名，以改进食品销售点脂肪、油和油脂排放的管理

IF 2.1

H2Open Journal Pub Date : 2023-01-31 DOI: 10.2166/h2oj.2023.056

T. Collin, R. Cunningham, Jitka MacAdam, R. Villa, B. Jefferson, P. Jeffrey

{"title":"Towards a risk ranking for improved management of discharges of fats, oils, and greases (FOGs) from food outlets","authors":"T. Collin, R. Cunningham, Jitka MacAdam, R. Villa, B. Jefferson, P. Jeffrey","doi":"10.2166/h2oj.2023.056","DOIUrl":"https://doi.org/10.2166/h2oj.2023.056","url":null,"abstract":"\u0000 The understanding of fats, oils, and greases (FOGs) pathways in commercial kitchens is relatively poor. In this contribution, we extend our understanding of how FOG is perceived and managed by those working within food service establishments (FSEs). A questionnaire (n = 107) exposes awareness of and experiences with FOG and characterises two important behaviours: kitchen appliance cleaning regimes and waste management practices. Findings demonstrate that awareness of issues caused by FOG in sewer networks is independent of job role or position and that a majority of respondents (74%) are acquainted with the impacts of poor FOG management. Application of a risk ranking approach revealed a low risk of emissions from waste frying oils and exposed behaviours which can serve to reduce FOG emission potential including pre-rinsing of plates and cleaning of fryers and extraction hoods. Critically, 69% of FSEs had no means of managing their FOG emissions. We conclude that sampled FSEs were generally unaware of the relative contribution of FOG sources, thereby limiting their ability to respond to the behavioural and technological options available for minimising its impact. The risk ranking developed in this paper could be used to suggest efforts to reduce and mitigate FOG emissions from FSEs.","PeriodicalId":36060,"journal":{"name":"H2Open Journal","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44251822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The impact of COVID-19 and natural disasters on water consumption across sectors: case studies of Barbados and Trinidad and Tobago 新冠肺炎和自然灾害对各部门用水的影响：巴巴多斯和特立尼达和多巴哥的案例研究

IF 2.1

H2Open Journal Pub Date : 2023-01-27 DOI: 10.2166/h2oj.2023.059

R. Roopnarine, A. Cashman, G. Eudoxie, Sara-Jade Govia, Crisanne Davis-Rostant, Renee Jackson, Akil Crichlow

{"title":"The impact of COVID-19 and natural disasters on water consumption across sectors: case studies of Barbados and Trinidad and Tobago","authors":"R. Roopnarine, A. Cashman, G. Eudoxie, Sara-Jade Govia, Crisanne Davis-Rostant, Renee Jackson, Akil Crichlow","doi":"10.2166/h2oj.2023.059","DOIUrl":"https://doi.org/10.2166/h2oj.2023.059","url":null,"abstract":"\u0000 In 2020, the COVID-19 pandemic added another layer of complexity to the already disruptive risk profiles of these countries. Understanding how these hazards, both individually and cumulatively, impact sectors, particularly essential sectors such as the water sector, is crucial to addressing current and future risks that the islands are likely to face. This paper examines the impact of the COVID-19 pandemic on water consumption while considering additional natural hazards which occurred concurrently in two Caribbean countries: Barbados and Trinidad and Tobago. The assessment indicated a marked influence on consumption levels in various sectors consistent with the imposed public health restrictions in the respective countries. In the case of Barbados, monthly consumption decreased during the pandemic across all categories when compared to the pre-COVID period, except for residential consumption, which increased by approximately 9%. For Trinidad and Tobago, the consumption data assessed showed a decrease in average monthly water consumption across all categories ranging from 3 to 13%. Although available data did not permit conclusive analysis, we have discerned some general trends, identified gaps, and provided recommendations.","PeriodicalId":36060,"journal":{"name":"H2Open Journal","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2023-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46888874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Water infiltration rate in the Kathmandu Valley of Nepal amidst present urbanization and land-use change 城市化和土地利用变化背景下尼泊尔加德满都谷地水分入渗速率

IF 2.1

H2Open Journal Pub Date : 2023-01-12 DOI: 10.2166/h2oj.2023.044

G. Shrestha, B. Shakya, M. Shrestha, U. Khadka

{"title":"Water infiltration rate in the Kathmandu Valley of Nepal amidst present urbanization and land-use change","authors":"G. Shrestha, B. Shakya, M. Shrestha, U. Khadka","doi":"10.2166/h2oj.2023.044","DOIUrl":"https://doi.org/10.2166/h2oj.2023.044","url":null,"abstract":"\u0000 The rapid urbanization and land-use change prominently decreased groundwater recharge areas. Infiltration occurring through permeable areas is responsible for groundwater recharge. However, detailed studies of infiltration in low-income countries especially in human-encroached recharge areas are limited. Thus, this study mainly aims to measure the infiltration rate in major recharge areas of the Kathmandu Valley (KV) using a double-ring infiltrometer (concentric ring size 30 and 15 cm). It also aims to estimate the volume of groundwater recharge with respect to the decrease in permeable areas in the northern part of the KV. The results revealed the infiltration rate ranging from 0.01 to 37.2 cm/h with an average of 7.3 ± 8.4 cm/h. The infiltration is found to be dependent upon land-use among different categories and organic matter among different soil properties. Additionally, the volume of water recharge in 2010, 2020, and 2030 was estimated as 67.73, 59.05, and 51.5 million cubic meter per year (MCM/year), respectively, which clearly showed a decrease in recharge water with respect to a decrease in the permeable areas. Hence, the findings would be useful for policymakers, stakeholders, and urban planners regarding the preservation and conservation of permeable areas for sustainable water resource management and urban flood management.","PeriodicalId":36060,"journal":{"name":"H2Open Journal","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2023-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42462843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Decoding Delhi's water governance through multi-level governance approach 通过多层次的治理方法解读德里的水治理

IF 2.1

H2Open Journal Pub Date : 2022-12-05 DOI: 10.2166/h2oj.2022.048

S. Kumari, Rabidyuti Biswas

引用次数: 0

Corrigendum: H2Open Journal 5 (2), 348–364: Strengthening country-led water and sanitation services monitoring and data use for decision-making: lessons from WaterAid experience in four countries, http://dx.doi.org/10.2166/h2oj.2022.028 更正：H2公开期刊5（2），348–364：加强国家主导的水和卫生服务监测和决策数据使用：四个国家水援助经验的教训，http://dx.doi.org/10.2166/h2oj.2022.028

IF 2.1

H2Open Journal Pub Date : 2022-12-01 DOI: 10.2166/h2oj.2022.002

C. Kimbugwe, Tim H. Davis, F. Goff, E. Greggio, Sokhadeva Chanthet, Benjamin Kiap

引用次数: 0

Editorial: Systems strengthening and human rights as entry points for WASH 社论:加强系统和人权是讲卫生运动的切入点

IF 2.1

H2Open Journal Pub Date : 2022-11-25 DOI: 10.2166/h2oj.2022.104

Professor Juliet Willetts, Dr. Naomi Carrard, Dr. Mohamad Mova Al'Afghani

引用次数: 0

Bioleached laterite nano iron catalyst (BLaNFeCs)-based Fenton's degradation of selective dyes in water 生物浸出红土纳米铁催化剂(BLaNFeCs)对水中选择性染料的Fenton降解

IF 2.1

H2Open Journal Pub Date : 2022-11-09 DOI: 10.2166/h2oj.2022.045

B. S, B. Manu, M. Sreenivasa

引用次数: 1

Flood susceptibility mapping in the Bilate catchment, Ethiopia 埃塞俄比亚Bilate流域洪水易感性地图

IF 2.1

H2Open Journal Pub Date : 2022-11-01 DOI: 10.2166/h2oj.2022.128

Muluneh Legesse Edamo, K. Bushira, Tigistu Yisihak Ukumo

{"title":"Flood susceptibility mapping in the Bilate catchment, Ethiopia","authors":"Muluneh Legesse Edamo, K. Bushira, Tigistu Yisihak Ukumo","doi":"10.2166/h2oj.2022.128","DOIUrl":"https://doi.org/10.2166/h2oj.2022.128","url":null,"abstract":"\u0000 Flood susceptibility mapping plays a key role in planning flood mitigation. Floods may not be avoidable due to future climate changes. The Bilate catchment in Ethiopia is vulnerable to flood disasters and it is used as a case study in this project. The analytical hierarchy process (AHP) under multi-criteria decision analysis (MCDA) is used to develop the flood susceptibility map of the Bilate catchment. It was accordingly found that factors such as slope, rainfall, land use/land cover (LULC), elevation, topographic wetness index (TWI), soil type (ST), sediment transport index (STI), drainage density (DD), stream power index (SPI), and distance from the river (DR) have significant effects on the flood intensity in the Bilate catchment. The output maps were developed using ArcGIS. The prepared flood susceptibility map was classified into five classes such as very low, low, moderate, high, and very high covering 9.3, 32.6, 41.2, 10.8, and 6.1% of the area, respectively. The flood susceptibility map reported in this research is a great resource for relevant parties, including government and non-governmental organizations, to evaluate the impacts of flooding in the Bilate catchment and throughout the nation. The flood identified in this research may also be used as a reference to flood-related studies.","PeriodicalId":36060,"journal":{"name":"H2Open Journal","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42015901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Machine learning algorithms for streamflow forecasting of Lower Godavari Basin Godavari河下游流域流量预测的机器学习算法

IF 2.1

H2Open Journal Pub Date : 2022-11-01 DOI: 10.2166/h2oj.2022.240

Rishith Kumar Vogeti, Bhavesh Rahul Mishra, K. Raju

{"title":"Machine learning algorithms for streamflow forecasting of Lower Godavari Basin","authors":"Rishith Kumar Vogeti, Bhavesh Rahul Mishra, K. Raju","doi":"10.2166/h2oj.2022.240","DOIUrl":"https://doi.org/10.2166/h2oj.2022.240","url":null,"abstract":"The present study applies three Machine Learning Algorithms, namely, Bi-directional Long Short-Term Memory (Bi-LSTM), Wavelet Neural Network (WNN), and eXtreme Gradient Boosting (XGBoost), to assess their suitability for streamflow projections of the Lower Godavari Basin. Historical data for 39 years of daily rainfall, evapotranspiration, and discharge are used, of which 80% were for the model training and 20% for validation. A Random Search method is used for hyperparameter tuning. XGBoost performs better than WNN, and Bi-LSTM with an R2, RMSE, NSE, and PBIAS of 0.88, 1.48, 0.86, and 29.3% during training, with corresponding values of 0.86, 1.63, 0.85, and 28.5%, respectively, during validation indicate consistency. Therefore, it is used further for projecting streamflow from a climate change perspective. Global Climate Model, Ec-Earth3 is used because of its potentiality, as observed from previous studies. Four Shared Socioeconomic Pathways (SSPs) are considered. Downscaling of future climate variables is based on Empirical Quantile Mapping. Eight decadal streamflow projections are computed – D1 to D8 (2021–2030 to 2091–2099) – exhibiting more pronounced changes within the warming range. They are compared with three historic time horizons of H1 (1982–1994), H2 (1995–2007), and H3 (2008–2020). The highest daily streamflow is observed in D1, D3, D4, D5, and D8 in SSP245; these are D6 and D7 in SSP585 as per XGBoost analysis.","PeriodicalId":36060,"journal":{"name":"H2Open Journal","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44740138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1