AWWA water science最新文献_第3页

Dual-Horizon Water Main Planning Using Anchored Weibull and Enhanced XGBoost Models 使用锚定Weibull和增强型XGBoost模型的双地平线水主规划

IF 1.8

AWWA water science Pub Date : 2026-03-21 DOI: 10.1002/aws2.70052

Alence Poudel, Carla Barrios, Paola De La Torre, Huy Ton

{"title":"Dual-Horizon Water Main Planning Using Anchored Weibull and Enhanced XGBoost Models","authors":"Alence Poudel, Carla Barrios, Paola De La Torre, Huy Ton","doi":"10.1002/aws2.70052","DOIUrl":"10.1002/aws2.70052","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Water utilities must balance long-term planning with next year's field operations. This study addresses that challenge with a dual-horizon framework, implemented for the City of Sugar Land, Texas. The framework combines a survival model for capital planning and a machine learning classifier for operational targeting. For the capital planning, anchored Weibull curves are fitted to local break data and aligned to manufacturer life expectations, producing stable hazard estimates, and remaining-life projections. For operations, a feature-enhanced XGBoost model was trained on a historic asset-year panel and validated by predicting future breaks. Its features incorporate joint type normalization, a 25 year break history, and spatial hotspot indicators. When trained through 2023 and tested on 2024, the model achieved 81.4% (area under the curve = 0.934), yielding a manageable list of 2676 pipes from 35,281 assets. Both horizons were integrated within a Geographic Information System, creating spatially clustered candidates for capital improvement programs.</p>\u0000 </section>\u0000 </div>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"8 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147567942","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

IF 1.8

AWWA water science Pub Date : 2026-03-10

引用次数: 0

Incorporating DAF Into Flocculation Process to Enhance Particle Removal During Intermittent Events 在絮凝过程中加入DAF以增强间歇事件中颗粒的去除

IF 1.8

AWWA water science Pub Date : 2026-03-10 DOI: 10.1002/aws2.70051

Bilal Abada, Eric C. Wert, Daylin Smith, Matthew Valade, Ariel J. Atkinson

{"title":"Incorporating DAF Into Flocculation Process to Enhance Particle Removal During Intermittent Events","authors":"Bilal Abada, Eric C. Wert, Daylin Smith, Matthew Valade, Ariel J. Atkinson","doi":"10.1002/aws2.70051","DOIUrl":"10.1002/aws2.70051","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>This study compared a standard Direct Filtration process (DF<sub>STD</sub>) with a similar process that incorporated dissolved air flotation into a flocculation basin (DF<sub>DAF</sub>) to mitigate the effect of particle loading events on filter run time and water quality. Pilot tests evaluated coagulant (0–20 mg/L as FeCl<sub>3</sub>) and cationic polymer (0–1 mg/L) dosing under varied influent turbidity conditions (0.5–20 NTU) at a fixed DAF recycle ratio (9.5%–10%) and hydraulic loading rate 2.2–2.4 gpm/ft<sup>2</sup> (5.4–5.8 m/h). With an influent turbidity of 20 NTU, DF<sub>DAF</sub> consistently extended filter run times (48–55 h) compared to DF<sub>STD</sub> (< 18 h), while meeting filter effluent water quality goals. Polymer addition during DF<sub>DAF</sub> resulted in a thicker sludge blanket, enhanced solids removal (NTU, Fe, and TSS), organics removal meeting enhanced coagulation requirements (TOC and UV<sub>254</sub>), and floc/particle accumulation in the upper filter layers rather than throughout the media. Continued development could prove the DF<sub>DAF</sub> process as feasible for full-scale implementation.</p>\u0000 </section>\u0000 </div>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"8 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://awwa.onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.70051","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147618083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

IF 1.8

AWWA water science Pub Date : 2026-03-10

引用次数: 0

IF 1.8

AWWA water science Pub Date : 2026-02-18

引用次数: 0

Disinfection Byproducts: Health Risks, Occurrence, Control, and Implications for Regulatory Revision 消毒副产物：健康风险、发生、控制和法规修订的意义

IF 1.8

AWWA water science Pub Date : 2026-02-18 DOI: 10.1002/aws2.70049

Eric S. Peterson, Benjamin D. Stanford, William Raseman, Caroline Russell, Chad Seidel, Gretchen Bruce

{"title":"Disinfection Byproducts: Health Risks, Occurrence, Control, and Implications for Regulatory Revision","authors":"Eric S. Peterson, Benjamin D. Stanford, William Raseman, Caroline Russell, Chad Seidel, Gretchen Bruce","doi":"10.1002/aws2.70049","DOIUrl":"10.1002/aws2.70049","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Research on drinking water disinfection continues to find both supporting and non-supporting evidence that trihalomethanes (THMs) and haloacetic acids (HAAs) are causative agents for adverse human health effects such as bladder cancer and that they are appropriate surrogates for reducing adverse health effects through further regulation. The EPA is revising the microbial/disinfection byproduct (M/DBP) rules to further protect public health; however, the decision to change or add regulations is hindered by uncertainty about the causative agents of DBP-associated risk and the role of compliance strategies to protect public health. Research conducted since the Stage 2 DBP rule was established helps fill some gaps and outlines lingering uncertainties that should be acknowledged as part of revised rulemaking. This thematic review summarizes regulatory implications of the state of the science in epidemiology, toxicology, occurrence/monitoring, and treatment/compliance, and identifies actions toward meaningful regulatory revisions despite ongoing uncertainty of DBP-associated human health risk drivers.</p>\u0000 </section>\u0000 </div>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"8 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147288340","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

IF 1.8

AWWA water science Pub Date : 2026-01-20

引用次数: 0

Surfactant Optimization for PFAS Removal in Site Groundwater Using Colloidal Gas Aphrons (CGAs) 胶体气aphron （CGAs）去除现场地下水中PFAS的表面活性剂优化

IF 1.8

AWWA water science Pub Date : 2026-01-20 DOI: 10.1002/aws2.70048

Poonam R. Kulkarni, Hassan Javed, Nicholas W. Johnson, John A. Connor, Jessica Alanis, William Vines, Hanadi Rifai, Charles J. Newell

{"title":"Surfactant Optimization for PFAS Removal in Site Groundwater Using Colloidal Gas Aphrons (CGAs)","authors":"Poonam R. Kulkarni, Hassan Javed, Nicholas W. Johnson, John A. Connor, Jessica Alanis, William Vines, Hanadi Rifai, Charles J. Newell","doi":"10.1002/aws2.70048","DOIUrl":"10.1002/aws2.70048","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Colloidal gas aphrons (CGAs) have proven successful in separating both long- and short-chain PFAS from water; however, little information is available on the impact of surfactants used for aphron generation. This study assesses the use of five cationic surfactant-generated CGAs in batch experiments to remove PFAS from two site groundwaters. The results found that lauric arginate ethyl ester (LAE), a food-grade surfactant used to generate CGAs, had the best performance, removing over 80% of PFAAs in a single stage. Removal rates were consistent between high- and low-concentration waters, indicating its versatility. The addition of a second stage of treatment improved PFAS removal, particularly for short-chain PFAS, as the first stage predominantly removed long-chain PFAS due to their greater presence in the initial water. Higher salinity and saponins reduced the removal rates due to competitive sorption. Overall, the success of a food-grade surfactant for CGA generation is significant in terms of water treatment.</p>\u0000 </section>\u0000 </div>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"8 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146016197","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

Drinking Water Biofiltration Performance With Varying Ozone and Hydraulic Operations 不同臭氧和水力操作下的饮用水生物过滤性能

IF 1.8

AWWA water science Pub Date : 2025-12-25 DOI: 10.1002/aws2.70047

Kara Cunningham, Amanda Minke, Ramola Vaidya, Christina Alito, Carolyn Hannoch, Eric Rogers, Jessica Edwards-Brandt, Gerardo Castaneda, Anurag Mantha, Mary Jo Kirisits, Emily Garner, Bradley Schmitz

{"title":"Drinking Water Biofiltration Performance With Varying Ozone and Hydraulic Operations","authors":"Kara Cunningham, Amanda Minke, Ramola Vaidya, Christina Alito, Carolyn Hannoch, Eric Rogers, Jessica Edwards-Brandt, Gerardo Castaneda, Anurag Mantha, Mary Jo Kirisits, Emily Garner, Bradley Schmitz","doi":"10.1002/aws2.70047","DOIUrl":"10.1002/aws2.70047","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>This study produced a comprehensive drinking water ozone-biofiltration evaluation by assessing performance at a newly commissioned facility with varying hydraulic and ozonation operations. In brief, 30 water quality, operational, and biological parameters were collected at 11 locations throughout the treatment train at least every other week for an entire year. Seasonal and environmental variation seemed to influence treatment performance more than operational changes (i.e., ozone or hydraulic re-rating). However, media adenosine triphosphate (ATP), an indicator of biomass, was sensitive to hydraulic variability. Organic carbon was identified as a reliable performance metric, particularly when total organic carbon (TOC) and dissolved organic carbon (DOC) shared a strong linear relationship. Carboxylic acid removal also served as a useful long-term monitoring tool for assessing ozone-biofilter performance. This study establishes a critical benchmark for capturing the effects of intermittent ozonation, variable hydraulic loading, and seasonal transitions that utilities can utilize to better understand ozone-biofiltration processes in drinking water treatment systems.</p>\u0000 </section>\u0000 </div>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"7 6","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://awwa.onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.70047","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145887212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Combined UV LED and Chlorine for Synergistic Drinking Water Disinfection and Assessment of Disinfection By-Product Formation UV LED与氯离子协同饮用水消毒及消毒副产物形成评价

IF 1.8

AWWA water science Pub Date : 2025-12-11 DOI: 10.1002/aws2.70046

Jin Li, Sean MacIsaac, Xuedongzi Jiang, Lindsay E. Anderson, Kyle D. Rauch, Taylor Prest, Ryan Swinamer, Amina K. Stoddart, Graham A. Gagnon

{"title":"Combined UV LED and Chlorine for Synergistic Drinking Water Disinfection and Assessment of Disinfection By-Product Formation","authors":"Jin Li, Sean MacIsaac, Xuedongzi Jiang, Lindsay E. Anderson, Kyle D. Rauch, Taylor Prest, Ryan Swinamer, Amina K. Stoddart, Graham A. Gagnon","doi":"10.1002/aws2.70046","DOIUrl":"10.1002/aws2.70046","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>This study provides a comprehensive evaluation of the effectiveness of 280 nm UV LEDs in enhancing chlorine disinfection in natural water sources. The results of this work indicate sequential treatments (UV-chlorine and chlorine-UV) further enhanced the disinfection efficiency of T1 in natural waters, especially at higher UV doses, such as 40 mJ cm<sup>−2</sup>. The log reduction value for the chlorine-UV sequence reached 6.65, slightly higher than the 6.29 for the UV-chlorine sequence, suggesting that sequencing influences disinfection efficacy at higher fluences. UV LED-enhanced chlorine disinfection did not significantly alter concentrations of THMs and HAAs. Overall, the findings of this study open new avenues for the application of UV LEDs in drinking water disinfection, demonstrating their potential as an alternative to traditional disinfection methods. Future research should further explore the effects of UV-chlorine combined treatments under different water quality conditions to optimize disinfection processes and provide theoretical support for innovation in water treatment technologies.</p>\u0000 </section>\u0000 </div>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"7 6","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://awwa.onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.70046","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145739416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0