Water science and engineering最新文献_第9页

Efficient degradation of dye pollutants in wastewater via photocatalysis using a magnetic zinc oxide/graphene/iron oxide-based catalyst 磁性氧化锌/石墨烯/氧化铁基催化剂光催化高效降解废水中的染料污染物

IF 4

Water science and engineering Pub Date : 2023-09-01 DOI: 10.1016/j.wse.2023.01.004

Piyawan Nuengmatcha , Arnannit Kuyyogsuy , Paweena Porrawatkul , Rungnapa Pimsen , Saksit Chanthai , Prawit Nuengmatcha

{"title":"Efficient degradation of dye pollutants in wastewater via photocatalysis using a magnetic zinc oxide/graphene/iron oxide-based catalyst","authors":"Piyawan Nuengmatcha , Arnannit Kuyyogsuy , Paweena Porrawatkul , Rungnapa Pimsen , Saksit Chanthai , Prawit Nuengmatcha","doi":"10.1016/j.wse.2023.01.004","DOIUrl":"10.1016/j.wse.2023.01.004","url":null,"abstract":"<div><p>In this paper, we present a proof-of-concept study of the enhancement of photocatalytic activity via a combined strategy of fabricating a visible-light responsive ternary heterostructure and improving overall photostability by incorporating magnetic zinc oxide/graphene/iron oxide (ZGF). A solvothermal approach was used to synthesize the catalyst. X-ray diffraction (XRD), scanning electron microscopic, energy dispersive X-ray, transmission electron microscopic, vibrating sample magnetometric, and ultraviolet–visible diffuse reflectance spectroscopic techniques were used to characterize the synthesized samples. The obtained optimal Zn(NO<sub>3</sub>)<sub>2</sub> concentration, temperature, and heating duration were 0.10 mol/L, 600°C, and 1 h, respectively. The XRD pattern revealed the presence of peaks corresponding to zinc oxide, graphene, and iron oxide, indicating that the ZGF catalyst was effectively synthesized. Furthermore, when the developed ZGF was used for methylene blue dye degradation, the optimum irradiation time, dye concentration, catalyst dosage, irradiation intensity, and solution pH were 90 min, 10 mg/L, 0.03 g/L, 100 W, and 8.0, respectively. Therefore, the synthesized ZGF system could be used as a catalyst to degrade dyes in wastewater samples. This hybrid nanocomposite consisting of zinc oxide, graphene, and iron oxide could also be used as an effective photocatalytic degrader for various dye pollutants.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"16 3","pages":"Pages 243-251"},"PeriodicalIF":4.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46177171","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: 4

Assessment of first-order-moment-based sample reconstruction method for design flood estimation in changing environment 基于一阶矩的样本重建方法在变化环境下的设计洪水估算评估

IF 4

Water science and engineering Pub Date : 2023-09-01 DOI: 10.1016/j.wse.2023.05.001

Yi-ming Hu, Zhong-min Liang, Yi-xin Huang, Jun Wang, Bin-quan Li

{"title":"Assessment of first-order-moment-based sample reconstruction method for design flood estimation in changing environment","authors":"Yi-ming Hu, Zhong-min Liang, Yi-xin Huang, Jun Wang, Bin-quan Li","doi":"10.1016/j.wse.2023.05.001","DOIUrl":"10.1016/j.wse.2023.05.001","url":null,"abstract":"<div><p>Estimating the design flood under nonstationary conditions is challenging. In this study, a sample reconstruction approach was developed to transform a nonstationary series into a stationary one in a future time window (FTW). In this approach, the first-order moment (<em>E</em><sub>FTW</sub>) of an extreme flood series in the FTW was used, and two possible methods of estimating <em>E</em><sub>FTW</sub> values in terms of point values and confidence intervals were developed. Three schemes were proposed to analyze the uncertainty of design flood estimation in terms of sample representativeness, uncertainty from <em>E</em><sub>FTW</sub> estimation, and both factors, respectively. To investigate the performance of the sample reconstruction approach, synthesis experiments were designed based on the annual peak series of the Little Sugar Creek in the United States. The results showed that the sample reconstruction approach performed well when the high-order moment of the series did not change significantly in the specified FTW. Otherwise, its performance deteriorated. In addition, the uncertainty of design flood estimation caused by sample representativeness was greater than that caused by <em>E</em><sub>FTW</sub> estimation.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"16 3","pages":"Pages 226-233"},"PeriodicalIF":4.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42488701","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

Impact of backwater on water surface profile in curved channels 回水对弯曲河道水面剖面的影响

IF 4

Water science and engineering Pub Date : 2023-09-01 DOI: 10.1016/j.wse.2023.04.006

Rui-hua Nie , Qi-hang Zhou , Wen-jie Li , Xing-nian Liu , Gang Xie , Lu Wang

{"title":"Impact of backwater on water surface profile in curved channels","authors":"Rui-hua Nie , Qi-hang Zhou , Wen-jie Li , Xing-nian Liu , Gang Xie , Lu Wang","doi":"10.1016/j.wse.2023.04.006","DOIUrl":"10.1016/j.wse.2023.04.006","url":null,"abstract":"<div><p>Owing to extensive construction of dams, the impact of backwater on flow may lead to navigation or flood control issues in curved channels. To date, the impact of backwater on the water surface profile in curved channels remains unknown and requires investigation. In this study, experiments were conducted in a glass-walled recirculating flume with a length of 19.4 m, a width of 0.6 m, and a depth of 0.8 m, and the impact of backwater on the water surface profile in a 90° channel bend was investigated. The experimental results showed that the backwater degree had a significant impact on the transverse and longitudinal flow depth distributions in the bend. The transverse slope of the flow (<em>J</em><sub>r</sub>) increased linearly with an increase in the Froude number of the approach flow upstream of the bend. <em>J</em><sub>r</sub> increased with the longitudinal location parameter <em>ξ</em> when −0.2 < <em>ξ</em> < 0.5, and decreased with <em>ξ</em> when 0.5 < <em>ξ</em> < 1.2. Furthermore, the results showed that <em>J</em><sub>r</sub> asymptotically decreased to zero with an increase in the degree of backwater. An equation was formulated to estimate the transverse slope of the flow in a 90° bend in backwater zones.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"16 3","pages":"Pages 295-301"},"PeriodicalIF":4.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43331971","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

Insights into remediation technology for malachite green wastewater treatment 孔雀石绿废水处理修复技术探讨

IF 4

Water science and engineering Pub Date : 2023-09-01 DOI: 10.1016/j.wse.2023.03.002

Peter Olusakin Oladoye , Timothy Oladiran Ajiboye , Wycliffe Chisutia Wanyonyi , Elizabeth Oyinkansola Omotola , Mayowa Ezekiel Oladipo

{"title":"Insights into remediation technology for malachite green wastewater treatment","authors":"Peter Olusakin Oladoye , Timothy Oladiran Ajiboye , Wycliffe Chisutia Wanyonyi , Elizabeth Oyinkansola Omotola , Mayowa Ezekiel Oladipo","doi":"10.1016/j.wse.2023.03.002","DOIUrl":"https://doi.org/10.1016/j.wse.2023.03.002","url":null,"abstract":"<div><p>Malachite green (MG) dye is a common industrial dye and organic contaminant that can be found in (waste)water. Textile and food industries make use of MG as dyeing and food coloring agents, respectively. However, MG is both genotoxic and mutagenic. Hence, the elimination of MG from MG-laden-wastewater is germane. This review summarizes up-to-date researches that have been reported in literature as regards the decontamination of toxic MG wastewater. Various removal methods (adsorption, membrane, Fenton system, and heterogenous and homogeneous photodegradation) were discussed. Of the two basic technologies that are comprehensively explored and reviewed, chemical treatment methods are not as viable as physical removal methods, such as the adsorption technology, due to the lack of secondary pollutant production, simple design, low operation costs, and resource availability. This review also presents various practical knowledge gaps needed for large-scale applications of adsorptive removal methods for MG. It concludes by recommending further research on the techniques of cheap and simple decontamination of MG to get clean water.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"16 3","pages":"Pages 261-270"},"PeriodicalIF":4.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49831243","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: 4

Anthropogenic disturbance of aquatic biodiversity and water quality of an urban river in Penang, Malaysia 马来西亚槟城城市河流水生生物多样性和水质的人为干扰

IF 4

Water science and engineering Pub Date : 2023-09-01 DOI: 10.1016/j.wse.2023.01.003

Nur Azalina Suzianti Feisal , Noor Haziqah Kamaludin , Muhammad Firdaus Abdullah Sani , Dayang Khairulnisa Awang Ahmad , Mohd Azwan Ahmad , Nur Faiza Abdul Razak , Tengku Nilam Baizura Tengku Ibrahim

{"title":"Anthropogenic disturbance of aquatic biodiversity and water quality of an urban river in Penang, Malaysia","authors":"Nur Azalina Suzianti Feisal , Noor Haziqah Kamaludin , Muhammad Firdaus Abdullah Sani , Dayang Khairulnisa Awang Ahmad , Mohd Azwan Ahmad , Nur Faiza Abdul Razak , Tengku Nilam Baizura Tengku Ibrahim","doi":"10.1016/j.wse.2023.01.003","DOIUrl":"10.1016/j.wse.2023.01.003","url":null,"abstract":"<div><p>Malaysia's rapid economic and demographic development have placed negative pressure on its water supplies and the quality of the Juru River, which is close to the nation's capital and its major source of water. Healthy aquatic ecosystems are supported by physicochemical properties and biological diversity. This study evaluated the anthropogenic impacts on aquatic biodiversity, especially plankton, fish, and macrobenthos, as well as the water quality of the Juru River in the Penang area. Aquatic biodiversity and river water parameters were collected from ten sampling stations along the Juru River. Seven variables were used to assess the physicochemical environment: pH, temperature, total suspended solids (TSS), salinity, dissolved oxygen (DO), biochemical oxygen demand (BOD), and chemical oxygen demand. At each sampling station, the total number of plankton, fish, and macrobenthic taxa were counted and analyzed. The relationships between the physicochemical parameters and aquatic biodiversity were investigated with biotypological analysis, principal component analysis, hierarchical cluster analysis, and linear regression analysis. These analyses showed that the richness and diversity indices were generally influenced by salinity, temperature, TSS, BOD, and pH. The data obtained in this study supported the bioindicator concept. The findings, as they related to scientifically informed conservation, could serve as a model for Juru River management, as well as for river management throughout Malaysia and other tropical Asian countries.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"16 3","pages":"Pages 234-242"},"PeriodicalIF":4.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43100599","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: 4

Evaluation of toppling rock slopes using a composite cloud model with DEMATEL–CRITIC method 基于DEMATEL-CRITIC方法的复合云模型对倾倒岩质边坡的评价

IF 4

Water science and engineering Pub Date : 2023-09-01 DOI: 10.1016/j.wse.2023.04.002

Huan-ling Wang , Xu-fei Zhao , Hong-jie Chen , Kui Yi , Wei-chau Xie , Wei-ya Xu

{"title":"Evaluation of toppling rock slopes using a composite cloud model with DEMATEL–CRITIC method","authors":"Huan-ling Wang , Xu-fei Zhao , Hong-jie Chen , Kui Yi , Wei-chau Xie , Wei-ya Xu","doi":"10.1016/j.wse.2023.04.002","DOIUrl":"10.1016/j.wse.2023.04.002","url":null,"abstract":"<div><p>Safety evaluation of toppling rock slopes developing in reservoir areas is crucial. To reduce the uncertainty of safety evaluation, this study developed a composite cloud model, which improved the combination weights of the decision-making trial and evaluation laboratory (DEMATEL) and criteria importance through intercriteria correlation (CRITIC) methods. A safety evaluation system was developed according to in situ monitoring data. The backward cloud generator was used to calculate the numerical characteristics of a cloud model of quantitative indices, and different virtual clouds were used to synthesize some clouds into a generalized one. The synthesized numerical characteristics were calculated to comprehensively evaluate the safety of toppling rock slopes. A case study of a toppling rock slope near the Huangdeng Hydropower Station in China was conducted using monitoring data collected since operation of the hydropower project began. The results indicated that the toppling rock slope was moderately safe with a low safety margin. The composite cloud model considers the fuzziness and randomness of safety evaluation and enables interchange between qualitative and quantitative knowledge. This study provides a new theoretical method for evaluating the safety of toppling rock slopes. It can aid in the predication, control, and even prevention of disasters.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"16 3","pages":"Pages 280-288"},"PeriodicalIF":4.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43419701","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: 3

Greenhouse gas reduction of co-benefit-type wastewater treatment system for fish-processing industry: A real-scale case study in Indonesia 鱼加工行业协同效益型废水处理系统的温室气体减排:印度尼西亚的实际案例研究

IF 4

Water science and engineering Pub Date : 2023-09-01 DOI: 10.1016/j.wse.2023.03.001

Yoshiteru Hamatani , Takahiro Watari , Masashi Hatamoto , Takashi Yamaguchi , Tjandra Setiadi , Toshihiko Konda

{"title":"Greenhouse gas reduction of co-benefit-type wastewater treatment system for fish-processing industry: A real-scale case study in Indonesia","authors":"Yoshiteru Hamatani , Takahiro Watari , Masashi Hatamoto , Takashi Yamaguchi , Tjandra Setiadi , Toshihiko Konda","doi":"10.1016/j.wse.2023.03.001","DOIUrl":"10.1016/j.wse.2023.03.001","url":null,"abstract":"<div><p>This study examined the application of co-benefit-type wastewater treatment technology in the fish-processing industry. Given that there was a dearth of information on fish-processing industrial wastewater in Indonesia, site surveys were conducted. For the entire fish-processing industry throughout the country, the dissemination rate of wastewater treatment facilities was less than 50%. Using a co-benefit approach, a real-scale swim-bed technology (SBT) and a system combining an anaerobic baffled reactor (ABR) with SBT (ABR–SBT) were installed in a fishmeal processing factory in Bali, Indonesia, and the wastewater system process performance was evaluated. In a business-as-usual scenario, the estimated chemical oxygen demand load and greenhouse gas (GHG) emissions from wastewater from the Indonesian fish-processing industry were 33 000 tons per year and 220 000 tons of equivalent CO<sub>2</sub> per year, respectively. On the other hand, the GHG emissions in the co-benefit scenarios of the SBT system and ABR–SBT system were 98 149 and 26 720 tons per year, respectively. Therefore, introducing co-benefit-type wastewater treatment to Indonesia’s fish-processing industry would significantly reduce pollution loads and GHG emissions.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"16 3","pages":"Pages 271-279"},"PeriodicalIF":4.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45318755","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

Effect of Froude similitude deviation on curved channel simulations: A case study in the Middle Yangtze River 弗劳德相似偏差对弯曲河道模拟的影响——以长江中游为例

IF 4

Water science and engineering Pub Date : 2023-09-01 DOI: 10.1016/j.wse.2023.04.005

Xiao-ting Yang , Qian-qian Shang , Hui Xu , Guo-bin Li , Ya-jun Gao , Qi-lin Yang

{"title":"Effect of Froude similitude deviation on curved channel simulations: A case study in the Middle Yangtze River","authors":"Xiao-ting Yang , Qian-qian Shang , Hui Xu , Guo-bin Li , Ya-jun Gao , Qi-lin Yang","doi":"10.1016/j.wse.2023.04.005","DOIUrl":"10.1016/j.wse.2023.04.005","url":null,"abstract":"<div><p>Froude similitude and friction similitude are the two crucial similarity conditions that are often used in physical-scale modeling of rivers. However, models often deviate from Froude similitude when dealing with real-world situations. This study developed several fixed-bed river models with various curvatures to determine the effect of Froude similitude deviation on curved channel modeling. Models were constructed according to the characteristics of the Middle Yangtze River. Differences in longitudinal slope, transverse slope, and main stream line location were measured by varying Froude similitude deviation. The deviations of longitudinal slope and velocity were negligible because friction similitude was accounted for. The transverse slope varied significantly with the Froude similitude deviation, and the main stream line varied with the curvature and Froude similitude deviation. Formulae were derived to estimate the slope deviation. These analyses helped to clarify the feasibility of the method of Froude similitude deviation for curved channels.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"16 3","pages":"Pages 289-294"},"PeriodicalIF":4.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41703494","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

Deformation critical threshold estimation of Xiaowan ultrahigh arch dam with time-varying grey model 基于时变灰色模型的小湾超高拱坝变形临界阈值估计

IF 4

Water science and engineering Pub Date : 2023-09-01 DOI: 10.1016/j.wse.2023.07.001

Er-feng Zhao , Bo Li , Hao Chen , Bing-bing Nie

{"title":"Deformation critical threshold estimation of Xiaowan ultrahigh arch dam with time-varying grey model","authors":"Er-feng Zhao , Bo Li , Hao Chen , Bing-bing Nie","doi":"10.1016/j.wse.2023.07.001","DOIUrl":"10.1016/j.wse.2023.07.001","url":null,"abstract":"<div><p>The structural behavior of the Xiaowan ultrahigh arch dam is primarily influenced by external loads and time-varying characteristics of dam concrete and foundation rock mass during long-term operation. According to overload testing with a geological model and the measured time series of installed perpendicular lines, the space and time evolution characteristics of the arch dam structure were analyzed, and its mechanical performance was evaluated. Subsequently, the deformation centroid of the deflective curve was suggested to indicate the magnitude and unique distribution rules for a typical dam section using the measured deformation values at multi-monitoring points. The ellipse equations of the critical ellipsoid for the centroid were derived from the historical measured time series. Hydrostatic and seasonal components were extracted from the measured deformation values with a traditional statistical model, and residuals were adopted as a grey component. A time-varying grey model was developed to accurately predict the evolution of the deformation behavior of the ultrahigh arch dam during future operation. In the developed model, constant coefficients were modified so as to be time-dependent functions, and the prediction accuracy was significantly improved through introduction of a forgetting factor. Finally, the critical threshold was estimated, and predicted ellipsoids were derived for the Xiaowan arch dam. The findings of this study can provide technical support for safety evaluation of the actual operation of ultrahigh arch dams and help to provide early warning of abnormal changes.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"16 3","pages":"Pages 302-312"},"PeriodicalIF":4.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45940172","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

Simulation of internal nitrogen release from bottom sediments in an urban lake using a nitrogen flux model 利用氮通量模型模拟城市湖泊底部沉积物内部氮释放

IF 4

Water science and engineering Pub Date : 2023-09-01 DOI: 10.1016/j.wse.2023.06.002

Ran Gong , Hui-ya Wang , Zhi-xin Hu , Yi-ping Li

{"title":"Simulation of internal nitrogen release from bottom sediments in an urban lake using a nitrogen flux model","authors":"Ran Gong , Hui-ya Wang , Zhi-xin Hu , Yi-ping Li","doi":"10.1016/j.wse.2023.06.002","DOIUrl":"https://doi.org/10.1016/j.wse.2023.06.002","url":null,"abstract":"<div><p>Nutrient release from sediment is considered a significant source for overlying water. Given that nutrient release mechanisms in sediment are complex and difficult to simulate, traditional approaches commonly use assigned parameter values to simulate these processes. In this study, a nitrogen flux model was developed and coupled with the water quality model of an urban lake. After parameter sensitivity analyses and model calibration and validation, this model was used to simulate nitrogen exchange at the sediment–water interface in eight scenarios. The results showed that sediment acted as a buffer in the sediment–water system. It could store or release nitrogen at any time, regulate the distribution of nitrogen between sediment and the water column, and provide algae with nitrogen. The most effective way to reduce nitrogen levels in urban lakes within a short time is to reduce external nitrogen loadings. However, sediment release might continue to contribute to the water column until a new balance is achieved. Therefore, effective measures for reducing sediment nitrogen should be developed as supplementary measures. Furthermore, model parameter sensitivity should be individually examined for different research subjects.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"16 3","pages":"Pages 252-260"},"PeriodicalIF":4.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49831244","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