Water Science and Technology最新文献

Optimization of coagulation treatment of papermaking wastewater by magnetized polyferric sulfate and polyacrylamide. 磁化聚合硫酸铁与聚丙烯酰胺混凝处理造纸废水的优化研究。

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2026-04-01 Epub Date: 2026-04-18 DOI: 10.2166/wst.2026.259

Shiguo Gu, Guangliang Li, Wei Zhu, Zhengyan Xu, Yaqing Yang

{"title":"Optimization of coagulation treatment of papermaking wastewater by magnetized polyferric sulfate and polyacrylamide.","authors":"Shiguo Gu, Guangliang Li, Wei Zhu, Zhengyan Xu, Yaqing Yang","doi":"10.2166/wst.2026.259","DOIUrl":"https://doi.org/10.2166/wst.2026.259","url":null,"abstract":"This study investigated the coagulation effect of magnetized polyferric sulfate (PFS) and polyacrylamide (PAM) on papermaking wastewater. Results showed that the co-magnetized PFS-PAM group (Group C) achieved significantly higher removal rates of chemical oxygen demand (COD), color, turbidity, and UV254 than the nonmagnetized PFS-PAM group (Group B) and control group (Group A). Specifically, the effluent COD of Group C decreased to 46.72 mg/L, with color, turbidity, and UV254 removal rates increased by 16.85, 32.38, and 10.78%, respectively, compared with Group A. The enhanced efficiency was attributed to the cutting effect of magnetic induction lines in alternating magnetic fields (AMFs), which promoted coagulation and sedimentation. AMFs converted magnetic energy into internal energy of PFS particles, increasing multinuclear polymers in PFS solutions and strengthening complexation and chelation reactions. Orthogonal experiments identified the optimal parameter combination as A3B1C1D3E3 (PFS dosage: 1,000 mg/L, PAM dosage: 1.5 mg/L, magnetization intensity: 6 mT, magnetization time: 5 min, magnetization frequency: 130 Hz), under which the removal rates of COD, color, turbidity, and UV254 reached 94.2, 93.08, 90.07, and 89.35%, respectively. Importantly, PAM did not alter the magnetization effect, supporting the wide application of AMFs in wastewater treatment.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"93 8","pages":"1169-1179"},"PeriodicalIF":2.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147782672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PFOA adsorption onto biochar derived from invasive water hyacinth. 入侵水葫芦衍生生物炭对全氟辛酸的吸附

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2026-04-01 Epub Date: 2026-04-18 DOI: 10.2166/wst.2026.260

Prajwal Bhattarai, Sivasankar Annamalai, Namwon Kim, Sangchul Hwang

{"title":"PFOA adsorption onto biochar derived from invasive water hyacinth.","authors":"Prajwal Bhattarai, Sivasankar Annamalai, Namwon Kim, Sangchul Hwang","doi":"10.2166/wst.2026.260","DOIUrl":"https://doi.org/10.2166/wst.2026.260","url":null,"abstract":"Per- and polyfluoroalkyl substances (PFAS) are synthetic chemicals widely used in consumer products, firefighting foams, and various industrial applications. These chemicals are pervasive, persistent, and degradation-resistant, posing a critical threat to human and environmental health. Currently, adsorption remains the most widely used technology for the remediation of PFAS. However, large-scale PFAS removal would require extensive usage of adsorbents such as activated carbon, which tends to be relatively expensive. Therefore, we investigated the upcycling of water hyacinth, an invasive aquatic plant, as a sustainable source for biochar production to remove perfluorooctanoic acid (PFOA), a type of PFAS. Different kinetic and isotherm models assessed PFOA adsorption to water hyacinth biochar. Pseudo-second-order kinetics and Langmuir isotherm models proved to be better fits in most experiments. Intra-particle diffusion and surface adsorption were determined to contribute to the rate-limiting step, and a monolayer distribution of PFOA through chemisorption was found to be the primary mechanism of adsorption. Water hyacinth biochar exhibited an adsorption capacity of 154.39 μg/g for PFOA removal at a solid-to-liquid ratio of 1 (in mg/mL). Experiments at different pH levels revealed that electrostatic interactions influenced PFOA adsorption, and, in acidic conditions, the removal capacity increased to 164.91 μg/g.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"93 8","pages":"1180-1194"},"PeriodicalIF":2.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147782833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Greywater treatment using treatment wetland systems - five cases from Northern Europe. 使用处理湿地系统处理灰水—北欧5例。

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2026-04-01 Epub Date: 2026-04-03 DOI: 10.2166/wst.2026.254

Ashley Hall, Åsa Davidsson, Hamse Kjerstadius

{"title":"Greywater treatment using treatment wetland systems - five cases from Northern Europe.","authors":"Ashley Hall, Åsa Davidsson, Hamse Kjerstadius","doi":"10.2166/wst.2026.254","DOIUrl":"https://doi.org/10.2166/wst.2026.254","url":null,"abstract":"Treatment wetlands are widely used for greywater treatment in Europe, but upcoming stricter nutrient limits in the revised EU Urban Wastewater Treatment Directive (EU 2024/3019) raise questions about their ability to meet future standards. This is especially relevant as interest increases in scaling systems beyond 1,000 PE and in reusing treated greywater, which under the EU Water Reuse Regulation (EU 2020/741) requires compliance with EU 2024/3019 effluent limits. To assess performance under these conditions, four greywater treatment wetlands and one mixed wastewater reference wetland were monitored for 18 months. All wetlands consistently produced dissolved COD below 50 mg/L, within the strictest limit of 125 mg COD/L. However, only three of the wetlands achieved total nitrogen concentrations below the required 6 mg N/L. Regarding total phosphorus, only the two wetlands, which used phosphorus adsorbing media, met the 0.5 mg P/L limit. Performance was not strongly linked to flow path design. Instead, lower nitrogen loading and use of phosphorus adsorbing media were associated with higher quality effluents. Other factors, including system age and groundwater interactions, showed no consistent influence across sites. Overall, results show that treatment wetlands can meet EU wastewater requirements for greywater, though nutrient removal may require targeted design strategies.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"93 7","pages":"1100-1116"},"PeriodicalIF":2.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147692573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stoichiometric hydrogen peroxide versus hypochlorite generation via dual-cell continuous flow system enables singlet oxygen-dominated phenol oxidation. 过氧化氢与次氯酸盐的化学计量生成通过双电池连续流系统实现单线态氧主导的苯酚氧化。

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2026-04-01 Epub Date: 2026-03-24 DOI: 10.2166/wst.2026.248

Zihao Wan, Hui Hong, Zelin Wu, Jie Wang, Chenyi Xi, Shiwei Xie, Na Zhang

{"title":"Stoichiometric hydrogen peroxide versus hypochlorite generation via dual-cell continuous flow system enables singlet oxygen-dominated phenol oxidation.","authors":"Zihao Wan, Hui Hong, Zelin Wu, Jie Wang, Chenyi Xi, Shiwei Xie, Na Zhang","doi":"10.2166/wst.2026.248","DOIUrl":"https://doi.org/10.2166/wst.2026.248","url":null,"abstract":"Current electrochemical processes utilizing singlet oxygen (1O2) for wastewater treatment face limitations due to inefficient hydrogen peroxide (H2O2) generation and uncontrollable stoichiometric ratios between H2O2 and hypochlorite (ClO-). To address these operational bottlenecks, this study developed a dual-cell continuous-flow system that decouples the production of H2O2 and ClO- to degrade phenol and other organic contaminants. The system features a natural air diffusion cathode (ADC) for energy-efficient H2O2 generation without aeration and a dimensionally stable anode (DSA) for active chlorine production. By optimizing the applied current ratio (ADC:DSA = 2:1), an optimal 1:1 H2O2/ClO- stoichiometric molar ratio was achieved. This precise control successfully maximized 1O2 production (steady-state concentration: 5.77 ± 0.24 × 10-10 mM), resulting in a 97.9% removal of phenol under optimal conditions. Additionally, the system achieved removal rates of 71.6% for bisphenol A and 81.3% for sulfamethoxazole. Furthermore, the 1O2-dominated oxidation pathway suppressed the formation of chlorinated byproducts by 24-48% compared to a conventional single-cell electrochemical method. Overall, this engineered dual-cell architecture effectively overcomes the intrinsic bottlenecks of conventional electro-oxidation, establishing a robust, 1O2-driven paradigm for the safe and selective pretreatment of refractory wastewaters.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"93 7","pages":"1024-1038"},"PeriodicalIF":2.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147692695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Contribution of different soil depths and water storage layers to the runoff reduction performance of green roofs: a combined field experiment and modeling study. 不同土壤深度和蓄水层对绿色屋顶减径流性能的贡献：田间试验与模型研究相结合。

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2026-04-01 Epub Date: 2026-04-09 DOI: 10.2166/wst.2026.257

Jun Wang, Jian Tao, Guoxiong Mei

{"title":"Contribution of different soil depths and water storage layers to the runoff reduction performance of green roofs: a combined field experiment and modeling study.","authors":"Jun Wang, Jian Tao, Guoxiong Mei","doi":"10.2166/wst.2026.257","DOIUrl":"https://doi.org/10.2166/wst.2026.257","url":null,"abstract":"Green roofs play a key role in urban stormwater management. The runoff curve number (CN) model is commonly employed to estimate the impact of green roofs on regional runoff reduction. However, significant variations in runoff reduction rates among different types of green roofs preclude the use of a generalized runoff CN for accurate estimation. This study evaluates the runoff reduction performance of different green roof types through field experiments in a residential area in Southwest China, using water balance and CN modeling. Green roofs with a water storage layer increased annual runoff reduction by 12-25% compared with traditional designs. Optimal CN values were identified: 95 for traditional extensive, 97 for intensive, and 88-93 for storage-layer green roofs. Green roofs with a water storage layer contributed an 8-12% increase in annual runoff reduction in the study area. The findings provide essential theoretical and data support for determining CN values and assessing the effectiveness of green roofs with varied structures in stormwater management.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"93 8","pages":"1130-1143"},"PeriodicalIF":2.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147782666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrated biogas desulfurization and membrane extraction for ammonium sulfate recovery. 一体化沼气脱硫-膜萃取法回收硫酸铵。

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2026-04-01 Epub Date: 2026-03-10 DOI: 10.2166/wst.2026.241

Werner Fuchs, Ferdinand Hummel, Paula Garcia Sarzosa, Lisa Bauer, Wolfgang Gabauer

{"title":"Integrated biogas desulfurization and membrane extraction for ammonium sulfate recovery.","authors":"Werner Fuchs, Ferdinand Hummel, Paula Garcia Sarzosa, Lisa Bauer, Wolfgang Gabauer","doi":"10.2166/wst.2026.241","DOIUrl":"https://doi.org/10.2166/wst.2026.241","url":null,"abstract":"This study presents a novel integrated system for biogas purification and nutrient recovery, combining biological desulfurization with ammonia recovery using a hollow-fiber membrane contactor. Designed for anaerobic treatment of nitrogen- and sulfur-rich wastes, the system enables simultaneous hydrogen sulfide (H2S) removal and ammonium sulfate production, improving environmental performance and resource recovery. A two-stage desulfurization unit scrubbed and biologically oxidized H2S to sulfuric acid under controlled oxygen supply. The acid was neutralized by ammonia extracted from the biogas effluent through a hydrophobic membrane, forming ammonium sulfate without chemical additives. The system achieved over 95% H2S removal, with outlet concentrations below 35 ppm, and accumulated up to 12.5 g/L (0.095 mol/L) ammonium sulfate. Operation remained stable over several months at pH 3.0, with mass balance and ion analyses confirming efficient sulfur conversion. Microbial analysis identified Acidithiobacillus and Alicyclobacillus as dominant sulfur oxidizers. Compared with conventional systems, the two-stage design avoided sulfur clogging and biogas dilution. This robust, scalable process couples gas purification with nutrient recovery, producing a concentrated fertilizer solution while minimizing chemical use and supporting circular resource utilization.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"93 7","pages":"953-967"},"PeriodicalIF":2.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147692684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrocoagulation technology for wastewater treatment: insights on design, applications, and challenges. 电絮凝废水处理技术：设计、应用和挑战。

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2026-04-01 Epub Date: 2026-03-30 DOI: 10.2166/wst.2026.250

Saman Nigar, R Naresh Kumar

{"title":"Electrocoagulation technology for wastewater treatment: insights on design, applications, and challenges.","authors":"Saman Nigar, R Naresh Kumar","doi":"10.2166/wst.2026.250","DOIUrl":"https://doi.org/10.2166/wst.2026.250","url":null,"abstract":"The electrocoagulation process has emerged as a promising alternative for wastewater treatment due to its high versatility for contaminant removal. The objective of this review is to provide a critical analysis of electrocoagulation technology, including its operating principles, fields of application, advantages, and limitations in wastewater treatment. In this process, metal electrodes release coagulant species directly into the water, which then destabilise suspended, dissolved, and colloidal pollutants. The efficiency of EC is strongly dependent on design and operating factors, including electrode material, current density, electrode spacing, pH, and hydraulic conditions. The present work reviewed municipal and industrial wastewater treatment using EC technology in batch, continuous, and pilot-scale systems, focusing on turbidity, nutrients, metals, dyes, oils, and organic pollutant removal. However, practical challenges have to date limited its widespread adoption, requiring research and development. Issues such as electrode passivation, sludge generation, energy demand, and scale-up from laboratory to field conditions remain significant ones. Recent research has focused on optimising reactor configurations, coupling EC with other treatment processes, and exploring renewable energy inputs to improve overall sustainability. By addressing these design and operational concerns, the strong potential of EC as a cost-effective and adaptable solution to meet growing wastewater treatment demands could be fully realised.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"93 7","pages":"968-983"},"PeriodicalIF":2.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147692619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development and deployment of a groundwater quality prediction tool for Béchar, Southwest Algeria: benchmarking seven machine learning algorithms. 开发和部署阿尔及利亚西南部bassahar的地下水质量预测工具：对七种机器学习算法进行基准测试。

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2026-04-01 Epub Date: 2026-04-02 DOI: 10.2166/wst.2026.252

Enas E Hussein, Ibrahim B M Taha, Abdessamed Derdour, Abdulrahman Seraj Almalki, Amanuel Kumsa Bojer, Mohamed A Eizeldin

{"title":"Development and deployment of a groundwater quality prediction tool for Béchar, Southwest Algeria: benchmarking seven machine learning algorithms.","authors":"Enas E Hussein, Ibrahim B M Taha, Abdessamed Derdour, Abdulrahman Seraj Almalki, Amanuel Kumsa Bojer, Mohamed A Eizeldin","doi":"10.2166/wst.2026.252","DOIUrl":"https://doi.org/10.2166/wst.2026.252","url":null,"abstract":"Accurate prediction of groundwater quality is essential for environmental monitoring and public health protection, particularly in arid regions such as Béchar in southwest Algeria. This study applied a root mean square-based water quality index (RMS-WQI) to evaluate groundwater quality using 621 samples characterized by physicochemical parameters, including pH, electrical conductivity, total dissolved solids, major cations, major anions, and nitrate. Seven supervised machine learning algorithms K-nearest neighbors, artificial neural network (ANN), support vector machine (SVM), ensemble trees (EN), discriminant analysis, Naïve Bayes, and decision trees were trained and optimized in MATLAB using the Classification Learner Toolbox with Bayesian optimization and fivefold cross-validation. Among the tested models, ANN and SVM achieved the highest predictive performance, with accuracies of 99.47 and 97.88%, respectively, along with superior precision, recall, F1-score, and Cohen's Kappa values, indicating strong agreement with observed RMS-WQI classes. Compared to conventional RMS-WQI assessment and previously reported nonoptimized models, the proposed framework demonstrates improved classification accuracy and robustness. Additionally, an operational graphical user interface was developed to facilitate rapid groundwater quality estimation using routine measurements. The findings highlight the effectiveness of optimized ANN and SVM models as reliable decision support tools for groundwater quality management in data-scarce arid environments.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"93 8","pages":"1144-1168"},"PeriodicalIF":2.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147782744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental comparison of rainfall simulation methods for urban stormwater management research. 城市雨水管理研究中降雨模拟方法的实验比较。

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2026-04-01 Epub Date: 2026-03-26 DOI: 10.2166/wst.2026.249

Rachel Neleah van Zyl, Ione Loots

{"title":"Experimental comparison of rainfall simulation methods for urban stormwater management research.","authors":"Rachel Neleah van Zyl, Ione Loots","doi":"10.2166/wst.2026.249","DOIUrl":"https://doi.org/10.2166/wst.2026.249","url":null,"abstract":"Rainfall simulators are typically categorised as either pressurised or drop-forming systems, each offering distinct advantages depending on the research application. This study presents a comparative experimental analysis of a pressurised nozzle-based rainfall simulator and a drop-forming needle-based rainfall simulator, assessing their suitability for urban stormwater management research. Both setups were constructed indoors with a 1.5 × 1.5 m rainfall area and a 2.3 m raindrop fall height. The simulators were evaluated based on rainfall intensity, spatial uniformity, drop size distribution and drop velocity. The pressurised system produced intensities from 23.9 to 109.7 mm/h, while the drop-forming system achieved 4.5-21.0 mm/h. Uniformity coefficients ranged from 81.2 to 93.3% (cups) and 86.6 to 96.4% (trays) for the pressurised system, and 85.7% (cups) and 94.8% (trays) for the drop-forming system. D50 raindrop sizes ranged from 0.8 to 1.2 mm for the pressurised system and 1.7 mm for the drop-forming system. Estimated median drop velocities ranged from 82.5 to 98.5% of terminal velocity. While both systems replicated key rainfall characteristics, the pressurised simulator was limited to high-intensity events. The drop-forming simulator offered finer control and broader applicability, supporting its use in urban hydrology and stormwater management research.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"93 7","pages":"984-1002"},"PeriodicalIF":2.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147692570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Closing the gaps: applicability of missing data handling techniques for urban runoff quality time series. 缩小差距：缺失数据处理技术对城市径流质量时间序列的适用性。

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2026-04-01 Epub Date: 2026-03-23 DOI: 10.2166/wst.2026.246

Nikita Razguliaev, Kelsey Flanagan, Tone Muthanna, Maria Viklander

{"title":"Closing the gaps: applicability of missing data handling techniques for urban runoff quality time series.","authors":"Nikita Razguliaev, Kelsey Flanagan, Tone Muthanna, Maria Viklander","doi":"10.2166/wst.2026.246","DOIUrl":"https://doi.org/10.2166/wst.2026.246","url":null,"abstract":"Adoption of sensor-based on-site monitoring in urban-water engineering enables the collection of high-resolution data, but malfunctions and environmental disturbances can pose a serious challenge in uptake and use, as they result in data gaps and loss of information. One solution to handle these data gaps is the use of machine-learning (ML) algorithms. This study compared widely used deterministic interpolation methods and data-driven methods - particularly neural networks - for reconstructing extended data gaps in urban runoff quality time series. The analysis is based on runoff water quality data from a small and relatively homogeneous section of an urban road. While simpler interpolation methods achieved high overall accuracy, ML models outperformed the simpler methods during highly dynamic periods - those that are typically more challenging to capture and often of particular interest in stormwater management contexts. The findings highlight both the limitations and the potential of each approach, emphasizing the particular importance of understanding context and data conditions when selecting the most suitable method for the task.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"93 7","pages":"933-952"},"PeriodicalIF":2.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147692588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0