Pub Date : 2023-05-05DOI: 10.1080/1573062X.2023.2209061
Yangwei Zhang, Franziska Tügel, Hao Han, J. Hou, R. Hinkelmann
ABSTRACT The Hydroinformatics Modeling System (HMS) was used to simulate rainfall-runoff experiments to investigate the impact of different slopes and rainfall intensities for traditional and low-impact development (LID) surface conditions. HMS solves the depth-averaged 2D shallow water equations with robust numerical methods. Most importantly, depth-dependent roughness and depth-dependent infiltration methods are implemented and allow the model to simulate a bunch of scenarios. Calibration and validation results are evaluated based on the criteria of the Nash-Sutcliffe Efficiency (NSE) and Standard Deviation Ratio (SDR). Both, the calibration and validation cases achieve very good agreements between computations and measurements with NSE all higher or equal than 0.97 and SDR all smaller or equal 0.17. The results demonstrate the superiority of the depth-dependent infiltration method when compared to a constant infiltration and the necessity of the depth-dependent roughness approach for accuracy and stability reasons. The methods implemented here might also improve other shallow water models.
{"title":"Numerical investigation of depth-dependent roughness and infiltration methods in rainfall-runoff experiments","authors":"Yangwei Zhang, Franziska Tügel, Hao Han, J. Hou, R. Hinkelmann","doi":"10.1080/1573062X.2023.2209061","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2209061","url":null,"abstract":"ABSTRACT The Hydroinformatics Modeling System (HMS) was used to simulate rainfall-runoff experiments to investigate the impact of different slopes and rainfall intensities for traditional and low-impact development (LID) surface conditions. HMS solves the depth-averaged 2D shallow water equations with robust numerical methods. Most importantly, depth-dependent roughness and depth-dependent infiltration methods are implemented and allow the model to simulate a bunch of scenarios. Calibration and validation results are evaluated based on the criteria of the Nash-Sutcliffe Efficiency (NSE) and Standard Deviation Ratio (SDR). Both, the calibration and validation cases achieve very good agreements between computations and measurements with NSE all higher or equal than 0.97 and SDR all smaller or equal 0.17. The results demonstrate the superiority of the depth-dependent infiltration method when compared to a constant infiltration and the necessity of the depth-dependent roughness approach for accuracy and stability reasons. The methods implemented here might also improve other shallow water models.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"652 - 664"},"PeriodicalIF":2.7,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46315182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-05-05DOI: 10.1080/1573062X.2023.2209560
João Caetano, N. Carriço, J. Figueira, D. Covas
ABSTRACT The establishment of effective medium and long-term rehabilitation strategies is essential to counter the continuous process of deterioration of the water distribution networks. A novel methodology to support pipe rehabilitation planning, including the establishment and scheduling of interventions in the medium and long-term using the graph theory, is developed, and demonstrated using a real case study. This methodology is divided into two main phases: the first is the definition of rehabilitation pipe groups according to the available budget and pipes connectivity and the second is the scheduling of these groups over time according to relevant criteria. This approach allows a clearer correspondence between the financial amounts to be annually invested in rehabilitation and a grouping of single pipes to be rehabilitated. Results demonstrate that the methodology allows a better and advanced planning of interventions when compared with the current traditional approaches applied by water utilities.
{"title":"A novel methodology for pipe grouping and rehabilitation interventions scheduling in water distribution networks","authors":"João Caetano, N. Carriço, J. Figueira, D. Covas","doi":"10.1080/1573062X.2023.2209560","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2209560","url":null,"abstract":"ABSTRACT The establishment of effective medium and long-term rehabilitation strategies is essential to counter the continuous process of deterioration of the water distribution networks. A novel methodology to support pipe rehabilitation planning, including the establishment and scheduling of interventions in the medium and long-term using the graph theory, is developed, and demonstrated using a real case study. This methodology is divided into two main phases: the first is the definition of rehabilitation pipe groups according to the available budget and pipes connectivity and the second is the scheduling of these groups over time according to relevant criteria. This approach allows a clearer correspondence between the financial amounts to be annually invested in rehabilitation and a grouping of single pipes to be rehabilitated. Results demonstrate that the methodology allows a better and advanced planning of interventions when compared with the current traditional approaches applied by water utilities.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"769 - 781"},"PeriodicalIF":2.7,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49157010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-05-05DOI: 10.1080/1573062X.2023.2209553
Bruno Ferreira, A. Antunes, N. Carriço, D. Covas
ABSTRACT The optimal location of pressure sensors is typicallysolved using heuristic algorithms. Non-dominated Sorting Genetic Algorithm II (NSGA-II) is one of the most used algorithms in the water industry, requiring a preliminary parameter tuning process. The lack of guidelines on how to tune model parameters generally limits the use of these algorithms by researchers or practitioners and, as such, fails to be used in real-life problems. The current paper explores different NSGA-II parameterizations for the optimal location of pressure sensors by using a multi-objective optimization methodology applied to a real distribution network. Results show that (i) both the uniform and simulated binary crossover operators (depending on the internal parameters) produce the best results, being the former recommended since it does not require further parameter tuning; (ii) polynomial mutation with lower probability value should be chosen; and (iii) the distribution indices of polynomial mutation have a minor effect on NSGA-II performance.
压力传感器的最优位置通常采用启发式算法求解。非支配排序遗传算法II (non - dominant Sorting Genetic Algorithm II, NSGA-II)是用水行业中应用最广泛的算法之一，该算法需要进行初步的参数调整过程。缺乏关于如何调整模型参数的指导方针通常限制了研究人员或实践者对这些算法的使用，因此无法在现实问题中使用。本文采用多目标优化方法，在实际配电网中探讨了不同的NSGA-II参数化对压力传感器最优位置的影响。结果表明:(i)均匀和模拟二元交叉算子(取决于内部参数)产生最好的结果，被推荐为前者，因为它不需要进一步的参数调整;(ii)选择概率值较低的多项式突变;(3)多项式突变分布指标对NSGA-II性能影响较小。
{"title":"NSGA-II parameterization for the optimal pressure sensor location in water distribution networks","authors":"Bruno Ferreira, A. Antunes, N. Carriço, D. Covas","doi":"10.1080/1573062X.2023.2209553","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2209553","url":null,"abstract":"ABSTRACT The optimal location of pressure sensors is typicallysolved using heuristic algorithms. Non-dominated Sorting Genetic Algorithm II (NSGA-II) is one of the most used algorithms in the water industry, requiring a preliminary parameter tuning process. The lack of guidelines on how to tune model parameters generally limits the use of these algorithms by researchers or practitioners and, as such, fails to be used in real-life problems. The current paper explores different NSGA-II parameterizations for the optimal location of pressure sensors by using a multi-objective optimization methodology applied to a real distribution network. Results show that (i) both the uniform and simulated binary crossover operators (depending on the internal parameters) produce the best results, being the former recommended since it does not require further parameter tuning; (ii) polynomial mutation with lower probability value should be chosen; and (iii) the distribution indices of polynomial mutation have a minor effect on NSGA-II performance.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"738 - 750"},"PeriodicalIF":2.7,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44968365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-05-04DOI: 10.1080/1573062X.2023.2209066
M. Cárdenas-Quintero, F. Carvajal-Serna
ABSTRACT Studies on the hydraulics of urban storm inlets have relied on dimensional analysis and numerical models to represent the capture process of grates using empirical equations. Because of the test hypotheses and proposed applications, various formulations generate scattered knowledge that is difficult to compare. The experiments of three grates at full scale (1:1) are reanalyzed, with total flows ranging from 10 to 81 l/s, transversal slopes ranging from 0.7% to 3%, and longitudinal slopes ranging from 2% to 8% to better understand the catchment of urban grate inlets. The traditional weir equation has been properly adjusted, with the hydraulic head, such as the flow velocity and depth head, as well as the discharge coefficient varying between 0.05 and 0.232, depending on the Froude number of the approaching flow.
{"title":"Hydraulic capacity of a grate inlet in supercritical flow: weir equation","authors":"M. Cárdenas-Quintero, F. Carvajal-Serna","doi":"10.1080/1573062X.2023.2209066","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2209066","url":null,"abstract":"ABSTRACT Studies on the hydraulics of urban storm inlets have relied on dimensional analysis and numerical models to represent the capture process of grates using empirical equations. Because of the test hypotheses and proposed applications, various formulations generate scattered knowledge that is difficult to compare. The experiments of three grates at full scale (1:1) are reanalyzed, with total flows ranging from 10 to 81 l/s, transversal slopes ranging from 0.7% to 3%, and longitudinal slopes ranging from 2% to 8% to better understand the catchment of urban grate inlets. The traditional weir equation has been properly adjusted, with the hydraulic head, such as the flow velocity and depth head, as well as the discharge coefficient varying between 0.05 and 0.232, depending on the Froude number of the approaching flow.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"763 - 768"},"PeriodicalIF":2.7,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41977130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-04-28DOI: 10.1080/1573062X.2023.2207099
J. Davy, A. Todd, G. Metson, Andrew Thatcher
ABSTRACT Unplanned, high-density settlements in low-middle income countries often lack functional wastewater management systems. Nature-based solutions, such as constructed wetlands, are an option for the treatment of greywater, provided they are used by and useful to the community. We explored the effectiveness of iterative design for two pilot constructed wetlands in an informal settlement in Johannesburg, South Africa. Using ergonomics and human factors (E/HF) design approaches, this study evaluated the usability and postural risks associated with interactions with the constructed wetlands to motivate (and evaluate) design changes to increase use and reduce the risk of musculoskeletal pain. An elevated work area reduced musculoskeletal risks and a larger work area allowed more users at one time. The raised work areas provided other benefits such as stormwater and sewerage protection. The value of E/HF as part of a broader transdisciplinary team was demonstrated by embedding the design in the activities of the community.
{"title":"Designing a greywater treatment system in a highly adaptive urban environment: an ergonomics and human factors observational analysis","authors":"J. Davy, A. Todd, G. Metson, Andrew Thatcher","doi":"10.1080/1573062X.2023.2207099","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2207099","url":null,"abstract":"ABSTRACT Unplanned, high-density settlements in low-middle income countries often lack functional wastewater management systems. Nature-based solutions, such as constructed wetlands, are an option for the treatment of greywater, provided they are used by and useful to the community. We explored the effectiveness of iterative design for two pilot constructed wetlands in an informal settlement in Johannesburg, South Africa. Using ergonomics and human factors (E/HF) design approaches, this study evaluated the usability and postural risks associated with interactions with the constructed wetlands to motivate (and evaluate) design changes to increase use and reduce the risk of musculoskeletal pain. An elevated work area reduced musculoskeletal risks and a larger work area allowed more users at one time. The raised work areas provided other benefits such as stormwater and sewerage protection. The value of E/HF as part of a broader transdisciplinary team was demonstrated by embedding the design in the activities of the community.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"624 - 637"},"PeriodicalIF":2.7,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42435810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-04-28DOI: 10.1080/1573062X.2023.2207083
Sedigheh Arvand, Zahra Ganji Noroozi, M. Delghandi, A. Alipour
ABSTRACT The present study examines the effectiveness of six LID-BMPs in urban runoff reduction in Neyshabour city, Iran. The validated Storm Water Management Model (SWMM5.1) was employed to assess the effectiveness of LID-BMPs in mitigating runoff volume. The hydrological model was calibrated and validated with nine in-site measured flood hydrographs. 11 LID-BMP scenarios were planned to determine the most effective combination of LID-BMPs. The results showed that according to the site conditions, Infiltration Trench (IT) and Rain Barrel (RB) practices with 22.2% and 0.4% reduction rates had the highest and lowest efficiency in reducing urban runoff. By assessing various combinations of LID-BMPs, it was found that the combination of IT, Bio-Retention (BR), Stormwater Dry Ponds (SDP), Porous Pavement (PP), and Rain Garden (RG) provides the most effective strategy for runoff management. Despite the high efficiency of LID-BMPs in reducing runoff, they are not able to completely handle the consequences of urbanization.
{"title":"Evaluating the impact of LID-BMPs on urban runoff reduction in an urban sub-catchment","authors":"Sedigheh Arvand, Zahra Ganji Noroozi, M. Delghandi, A. Alipour","doi":"10.1080/1573062X.2023.2207083","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2207083","url":null,"abstract":"ABSTRACT The present study examines the effectiveness of six LID-BMPs in urban runoff reduction in Neyshabour city, Iran. The validated Storm Water Management Model (SWMM5.1) was employed to assess the effectiveness of LID-BMPs in mitigating runoff volume. The hydrological model was calibrated and validated with nine in-site measured flood hydrographs. 11 LID-BMP scenarios were planned to determine the most effective combination of LID-BMPs. The results showed that according to the site conditions, Infiltration Trench (IT) and Rain Barrel (RB) practices with 22.2% and 0.4% reduction rates had the highest and lowest efficiency in reducing urban runoff. By assessing various combinations of LID-BMPs, it was found that the combination of IT, Bio-Retention (BR), Stormwater Dry Ponds (SDP), Porous Pavement (PP), and Rain Garden (RG) provides the most effective strategy for runoff management. Despite the high efficiency of LID-BMPs in reducing runoff, they are not able to completely handle the consequences of urbanization.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"604 - 615"},"PeriodicalIF":2.7,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47692323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-04-28DOI: 10.1080/1573062X.2023.2207085
Carlos Montes, Laura Henao, Carlos Angarita
ABSTRACT This note proposes a new formula for predicting the self-cleansing velocity of suspended particles in sewer pipes. Dimensional analysis is carried out to develop a new equation based on sediment and hydraulic characteristics. Model performance is tested using experimental data collected at laboratory scale and benchmarking data from the literature. The accuracy of the developed formula is evaluated with the Coefficient of Determination (R2), the Mean Absolute Percentage Error (MAPE) and the Root Mean Squared Error (RMSE). Results demonstrate that the proposed equation is able to predict the particle Froude number and hence the self-cleansing velocity for a wide range of variations of sediment concentration, particle diameter, and hydraulic characteristics.
{"title":"Suspended sediment transport in sewers at limit of deposition","authors":"Carlos Montes, Laura Henao, Carlos Angarita","doi":"10.1080/1573062X.2023.2207085","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2207085","url":null,"abstract":"ABSTRACT This note proposes a new formula for predicting the self-cleansing velocity of suspended particles in sewer pipes. Dimensional analysis is carried out to develop a new equation based on sediment and hydraulic characteristics. Model performance is tested using experimental data collected at laboratory scale and benchmarking data from the literature. The accuracy of the developed formula is evaluated with the Coefficient of Determination (R2), the Mean Absolute Percentage Error (MAPE) and the Root Mean Squared Error (RMSE). Results demonstrate that the proposed equation is able to predict the particle Froude number and hence the self-cleansing velocity for a wide range of variations of sediment concentration, particle diameter, and hydraulic characteristics.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"616 - 623"},"PeriodicalIF":2.7,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45649491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-04-27DOI: 10.1080/1573062X.2023.2207110
M. Dzikowiec, K. Góralska, E. Brzeziańska-Lasota
ABSTRACT Sanitary indicators standardly used in water quality monitoring refer to fecal microorganisms or cyanobacterial toxins, but at present they do not include fungi, despite the fact that many fungi can pose potential health hazards. The aim of study was a quantitative and qualitative assessment of yeast in waters of urban artificial recreational reservoirs in relation to microbiological and sanitary cleanliness indicators and to demonstrate that yeast could be an indicator of anthropogenic pollution. In total, 18 species of yeast were isolated, including 13 classified as clinically relevant. Tested reservoirs exceeded the standards of sanitary indicators acceptable for bathing water. Since isolated yeasts are associated with living organisms, their presence in the water of urban recreational reservoirs may be a public health concern. Therefore, a mycological analysis should be incorporated into standard water quality assessment procedures. The results obtained are very promising, but further research is still needed.
{"title":"The level of aquatic yeast as a possible indicator of microbiological quality of urban recreational water reservoirs","authors":"M. Dzikowiec, K. Góralska, E. Brzeziańska-Lasota","doi":"10.1080/1573062X.2023.2207110","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2207110","url":null,"abstract":"ABSTRACT Sanitary indicators standardly used in water quality monitoring refer to fecal microorganisms or cyanobacterial toxins, but at present they do not include fungi, despite the fact that many fungi can pose potential health hazards. The aim of study was a quantitative and qualitative assessment of yeast in waters of urban artificial recreational reservoirs in relation to microbiological and sanitary cleanliness indicators and to demonstrate that yeast could be an indicator of anthropogenic pollution. In total, 18 species of yeast were isolated, including 13 classified as clinically relevant. Tested reservoirs exceeded the standards of sanitary indicators acceptable for bathing water. Since isolated yeasts are associated with living organisms, their presence in the water of urban recreational reservoirs may be a public health concern. Therefore, a mycological analysis should be incorporated into standard water quality assessment procedures. The results obtained are very promising, but further research is still needed.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"665 - 676"},"PeriodicalIF":2.7,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46635611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-04-27DOI: 10.1080/1573062X.2023.2204877
Ricardo Bonilla Brenes, Martín Morales, R. Oreamuno, J. Hack
ABSTRACT Urbanization is a global phenomenon which has provoked severe disruptions in hydrological cycles, resulting in flooding problems. While detailed studies exist for the world’s temperate zones, they are few for tropical zones where most of future urbanization may occur and where flooding is already a problem. A tropical watershed in Costa Rica was used to analyze the urban development and the associated hydrological response between 1945 and 2019, based on remotely sensed data and a numerical model. Using a detailed spatial-temporal approach, we found that the watershed’s overall urbanization over the timespan (+64%-points urban-areas) had led to major hydrological challenges (+80% runoff-volume, +220% peak-flow-rate and maximum-specific-discharge, and −25 min time-to-peak). These challenges were then placed in the context of historically reported flood events, providing a basis for spatially-differentiated flood mitigation actions and for guiding future urbanization. The study also provides valuable insights for other tropical regions with the same situation.
{"title":"Variation in the hydrological response within the Quebrada Seca watershed in Costa Rica resulting from an increase of urban land cover","authors":"Ricardo Bonilla Brenes, Martín Morales, R. Oreamuno, J. Hack","doi":"10.1080/1573062X.2023.2204877","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2204877","url":null,"abstract":"ABSTRACT Urbanization is a global phenomenon which has provoked severe disruptions in hydrological cycles, resulting in flooding problems. While detailed studies exist for the world’s temperate zones, they are few for tropical zones where most of future urbanization may occur and where flooding is already a problem. A tropical watershed in Costa Rica was used to analyze the urban development and the associated hydrological response between 1945 and 2019, based on remotely sensed data and a numerical model. Using a detailed spatial-temporal approach, we found that the watershed’s overall urbanization over the timespan (+64%-points urban-areas) had led to major hydrological challenges (+80% runoff-volume, +220% peak-flow-rate and maximum-specific-discharge, and −25 min time-to-peak). These challenges were then placed in the context of historically reported flood events, providing a basis for spatially-differentiated flood mitigation actions and for guiding future urbanization. The study also provides valuable insights for other tropical regions with the same situation.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"575 - 591"},"PeriodicalIF":2.7,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46834792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-04-24DOI: 10.1080/1573062X.2023.2204861
J. Xia, B. Dong, Mei-rong Zhou, Qijie Li, Xiaolei Zhang
ABSTRACT To investigate the influence of different clogging degrees of a street inlet on its discharge capacity, an experimental campaign with the clogging degree of inlet grate and connection tube varying from 0.0 to 0.75 were conducted in a double-layer flume platform with a horizontal bottom. A total of 608 experimental runs were conducted in a subcritical state, with the inflow discharge and surface water depth varying from 24 L/s to 45 L/s and from 0.022 m to 0.38 m, respectively. To facilitate the application of the unified formula under different clogging scenarios, a parameter termed the clogging decay coefficient was introduced. The relationship between clogging decay coefficient and clogging degree was proposed respectively for the clogging of grate and connection tube. The proposed unified formula has several advantages, including a simple structure, a better accuracy, and without the necessity to select different discharge coefficients.
{"title":"A unified discharge capacity formula of clogged grate inlets","authors":"J. Xia, B. Dong, Mei-rong Zhou, Qijie Li, Xiaolei Zhang","doi":"10.1080/1573062X.2023.2204861","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2204861","url":null,"abstract":"ABSTRACT To investigate the influence of different clogging degrees of a street inlet on its discharge capacity, an experimental campaign with the clogging degree of inlet grate and connection tube varying from 0.0 to 0.75 were conducted in a double-layer flume platform with a horizontal bottom. A total of 608 experimental runs were conducted in a subcritical state, with the inflow discharge and surface water depth varying from 24 L/s to 45 L/s and from 0.022 m to 0.38 m, respectively. To facilitate the application of the unified formula under different clogging scenarios, a parameter termed the clogging decay coefficient was introduced. The relationship between clogging decay coefficient and clogging degree was proposed respectively for the clogging of grate and connection tube. The proposed unified formula has several advantages, including a simple structure, a better accuracy, and without the necessity to select different discharge coefficients.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"564 - 574"},"PeriodicalIF":2.7,"publicationDate":"2023-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46962740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
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