Pub Date : 2023-11-01DOI: 10.1061/jidedh.ireng-10118
Li Yao, Jianbei Gu, Xiaoming Zhu, Shiping Ruan, Hao Chen
{"title":"Discussion of “Effect of Geonet on Scour Downstream of Horizontal Jets”","authors":"Li Yao, Jianbei Gu, Xiaoming Zhu, Shiping Ruan, Hao Chen","doi":"10.1061/jidedh.ireng-10118","DOIUrl":"https://doi.org/10.1061/jidedh.ireng-10118","url":null,"abstract":"","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"119 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134957264","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}
Pub Date : 2023-11-01DOI: 10.1061/jidedh.ireng-10139
T. Jin, P. X. Ramos, E. Mignot, N. Riviere, T. De Mulder
Open-channel confluences are important junctions in natural and human-made channel networks. Different controls of the confluence hydrodynamics have already been studied intensively, often in schematized geometrical configurations. The T-shaped planform with branches having rectangular cross-sections of equal width is a popular geometry in lab experiments and numerical modeling. However, limited research has been conducted concerning the influence on the flow features of widening or narrowing the downstream branch in such a confluence. Therefore, four geometrical cases with a different downstream channel width were studied with large eddy simulations, while keeping the tributary-dominant discharge ratio, the width of the upstream branches, and the tailwater depth constant. The effect of increasing the downstream-to-upstream branch width ratio was analyzed with regard to the water surface shape, the stagnation zone location, the tributary inflow angles at the interface with the junction, the separation zone dimensions, the flow acceleration toward the vena contracta, the secondary flow patterns and intensity, the turbulent kinetic energy in the shear layers, the bed shear stresses and the backwater effects in the upstream branches. When comparing the numerically predicted upstream-to-downstream water depth ratios with those predicted by the single analytical model applicable to confluences with unequal channel widths, it is found that both models capture the reduction of the upstream-to-downstream water depth ratios when widening the downstream branch, but benchmark cases show that the numerical model predicts the correct relative magnitude of the water depth ratios in the main channel and the tributary channel, contrary to the analytical model.
{"title":"Influence of Downstream Channel Width on Flow Features in a T-Shaped Open-Channel Confluence","authors":"T. Jin, P. X. Ramos, E. Mignot, N. Riviere, T. De Mulder","doi":"10.1061/jidedh.ireng-10139","DOIUrl":"https://doi.org/10.1061/jidedh.ireng-10139","url":null,"abstract":"Open-channel confluences are important junctions in natural and human-made channel networks. Different controls of the confluence hydrodynamics have already been studied intensively, often in schematized geometrical configurations. The T-shaped planform with branches having rectangular cross-sections of equal width is a popular geometry in lab experiments and numerical modeling. However, limited research has been conducted concerning the influence on the flow features of widening or narrowing the downstream branch in such a confluence. Therefore, four geometrical cases with a different downstream channel width were studied with large eddy simulations, while keeping the tributary-dominant discharge ratio, the width of the upstream branches, and the tailwater depth constant. The effect of increasing the downstream-to-upstream branch width ratio was analyzed with regard to the water surface shape, the stagnation zone location, the tributary inflow angles at the interface with the junction, the separation zone dimensions, the flow acceleration toward the vena contracta, the secondary flow patterns and intensity, the turbulent kinetic energy in the shear layers, the bed shear stresses and the backwater effects in the upstream branches. When comparing the numerically predicted upstream-to-downstream water depth ratios with those predicted by the single analytical model applicable to confluences with unequal channel widths, it is found that both models capture the reduction of the upstream-to-downstream water depth ratios when widening the downstream branch, but benchmark cases show that the numerical model predicts the correct relative magnitude of the water depth ratios in the main channel and the tributary channel, contrary to the analytical model.","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"86 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134957396","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}
Pub Date : 2023-11-01DOI: 10.1061/jidedh.ireng-10100
Ahmed A. Abdelmoneim, Andre Daccache, Roula Khadra
Surface irrigation is still by far the most common method adopted worldwide. For many developing countries, shifting to modern pressurized irrigation is hampered by system and energy costs. Gated pipes are an improvement on furrow irrigation. They offer an affordable modernization option for traditional surface systems. Designed to operate at low pressure, gated pipes have the potential to reduce conveyance losses, improve application uniformity, and minimize runoff, which is often responsible for spreading waterborne diseases and lowering water quality. However, very little pertinent data are available on their performance. In this paper, a new model (OptGate) for the design and performance analysis of self-compensated (SC) and conventional rectangular (CG) gated pipes is described and field validated. OptGate proved its reliability in simulating the discharges along the gated pipe with RMSE = 0.29 and 0.119 m3/h for CG and SC, respectively, under a range of streaming head pressures ranging from 2 to 10 m with a 2-m step. The proposed model can provide users with the ability to predict system performance under different pressures, spacings, gate shapes and behaviors, pipe diameters, and land topography scenarios.
{"title":"OptGate: A New Tool to Design and Analyze the Performance of Conventional and Self-Compensating Gated Pipe Systems","authors":"Ahmed A. Abdelmoneim, Andre Daccache, Roula Khadra","doi":"10.1061/jidedh.ireng-10100","DOIUrl":"https://doi.org/10.1061/jidedh.ireng-10100","url":null,"abstract":"Surface irrigation is still by far the most common method adopted worldwide. For many developing countries, shifting to modern pressurized irrigation is hampered by system and energy costs. Gated pipes are an improvement on furrow irrigation. They offer an affordable modernization option for traditional surface systems. Designed to operate at low pressure, gated pipes have the potential to reduce conveyance losses, improve application uniformity, and minimize runoff, which is often responsible for spreading waterborne diseases and lowering water quality. However, very little pertinent data are available on their performance. In this paper, a new model (OptGate) for the design and performance analysis of self-compensated (SC) and conventional rectangular (CG) gated pipes is described and field validated. OptGate proved its reliability in simulating the discharges along the gated pipe with RMSE = 0.29 and 0.119 m3/h for CG and SC, respectively, under a range of streaming head pressures ranging from 2 to 10 m with a 2-m step. The proposed model can provide users with the ability to predict system performance under different pressures, spacings, gate shapes and behaviors, pipe diameters, and land topography scenarios.","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"109 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134957269","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}
Pub Date : 2023-11-01DOI: 10.1061/jidedh.ireng-10098
Akbar Safarzadeh, Shadi Alizadeh Marallo
{"title":"Hydromechanics of the Asymmetric Trapezoidal Piano Key and Labyrinth Weirs","authors":"Akbar Safarzadeh, Shadi Alizadeh Marallo","doi":"10.1061/jidedh.ireng-10098","DOIUrl":"https://doi.org/10.1061/jidedh.ireng-10098","url":null,"abstract":"","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"699 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134956755","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}
Pub Date : 2023-11-01DOI: 10.1061/jidedh.ireng-10187
Alaa Adel Jasim Al-Hasani, Shamsuddin Shahid
Accurate reference evapotranspiration (ETo) estimation is crucial for water irrigation management and sustainable agriculture planning. The difficulty in obtaining several data requirements for employing the recommended Food and Agriculture Organization Penman-Monteith method (FAO-PM) for reliable estimation of ETo has led to the development of many empirical models. This is particularly crucial for Iraq, located in West Asia (29°15′00″–38°15′00″ N; 38°45′00″–48°45′00″ E), where meteorological data are often limited or missing. The objectives of the present study were to assess the performance of 40 ETo empirical models (13 radiation-based, 13 mass-transfer-based, and 14 temperature-based) against the FAO-PM model and identify alternative models with the minimal available data in three major climatic zones of Iraq: the Mediterranean climate (MCZ), semiarid (SCZ), and arid desert (ACZ). The recent ERA5 data set was adopted. The results indicate that (1) the Rohwer mass-transfer method is the best for estimating ETo for two-thirds of Iraq with a mean correlation coefficient (R2) of 0.97, mean Kling-Gupta efficiency (KGE) of 0.84, mean percent bias (PBIAS) of −8.92%, mean Nash-Sutcliffe efficiency coefficient (NSE) of 0.92, and root mean square error (RMSE)-observations standard deviation ratio (RSR) of 0.27, followed by the Penman (R2=0.90, KGE=0.75, NSE=0.77, RSR=0.46, and PBIAS=6.36%) and Caprio (R2=0.90, KGE=0.66, NSE=0.54, RSR=0.58, and PBIAS=24.64%) models; (2) Caprio is the best radiation-based model for estimating ETo, mainly in the ACZ, whereas Kharrufa is the best temperature-based model for estimating ETo, primarily in the SCZ and ACZ. Overall, the mass-transfer-based models performed better than other-based models for ETo estimation. The outcomes of this study provide a scientific reference for accurate ETo estimation using empirical models under limited data sets, which is valuable for irrigation management in Iraq.Practical ApplicationsAccurately estimating ETo is vital for effective water irrigation management and sustainable agriculture planning. However, the recommended method for estimating ETo, the FAO-PM method, requires various data inputs that may not always be readily available, especially in regions like Iraq. Therefore, this study assessed the performance of 40 empirical ETo models, categorized into radiation-based, mass-transfer-based, and temperature-based models, against the FAO-PM model in three major climatic zones of Iraq: the Mediterranean climate, the semiarid region, and the arid desert. The study found that the Rohwer mass-transfer method showed the best performance in estimating ETo for two-thirds of Iraq. The Penman and Caprio models also performed well in estimating ETo in specific areas. The study revealed that the choice of the ETo model varied depending on the climatic zone. The Caprio model performed best for radiation-based estimation in the arid desert, whereas the Kharrufa model was most effective for tem
{"title":"Assessment of 40 Empirical Models for Estimating Reference Evapotranspiration under the Three Major Climate Zones of Iraq","authors":"Alaa Adel Jasim Al-Hasani, Shamsuddin Shahid","doi":"10.1061/jidedh.ireng-10187","DOIUrl":"https://doi.org/10.1061/jidedh.ireng-10187","url":null,"abstract":"Accurate reference evapotranspiration (ETo) estimation is crucial for water irrigation management and sustainable agriculture planning. The difficulty in obtaining several data requirements for employing the recommended Food and Agriculture Organization Penman-Monteith method (FAO-PM) for reliable estimation of ETo has led to the development of many empirical models. This is particularly crucial for Iraq, located in West Asia (29°15′00″–38°15′00″ N; 38°45′00″–48°45′00″ E), where meteorological data are often limited or missing. The objectives of the present study were to assess the performance of 40 ETo empirical models (13 radiation-based, 13 mass-transfer-based, and 14 temperature-based) against the FAO-PM model and identify alternative models with the minimal available data in three major climatic zones of Iraq: the Mediterranean climate (MCZ), semiarid (SCZ), and arid desert (ACZ). The recent ERA5 data set was adopted. The results indicate that (1) the Rohwer mass-transfer method is the best for estimating ETo for two-thirds of Iraq with a mean correlation coefficient (R2) of 0.97, mean Kling-Gupta efficiency (KGE) of 0.84, mean percent bias (PBIAS) of −8.92%, mean Nash-Sutcliffe efficiency coefficient (NSE) of 0.92, and root mean square error (RMSE)-observations standard deviation ratio (RSR) of 0.27, followed by the Penman (R2=0.90, KGE=0.75, NSE=0.77, RSR=0.46, and PBIAS=6.36%) and Caprio (R2=0.90, KGE=0.66, NSE=0.54, RSR=0.58, and PBIAS=24.64%) models; (2) Caprio is the best radiation-based model for estimating ETo, mainly in the ACZ, whereas Kharrufa is the best temperature-based model for estimating ETo, primarily in the SCZ and ACZ. Overall, the mass-transfer-based models performed better than other-based models for ETo estimation. The outcomes of this study provide a scientific reference for accurate ETo estimation using empirical models under limited data sets, which is valuable for irrigation management in Iraq.Practical ApplicationsAccurately estimating ETo is vital for effective water irrigation management and sustainable agriculture planning. However, the recommended method for estimating ETo, the FAO-PM method, requires various data inputs that may not always be readily available, especially in regions like Iraq. Therefore, this study assessed the performance of 40 empirical ETo models, categorized into radiation-based, mass-transfer-based, and temperature-based models, against the FAO-PM model in three major climatic zones of Iraq: the Mediterranean climate, the semiarid region, and the arid desert. The study found that the Rohwer mass-transfer method showed the best performance in estimating ETo for two-thirds of Iraq. The Penman and Caprio models also performed well in estimating ETo in specific areas. The study revealed that the choice of the ETo model varied depending on the climatic zone. The Caprio model performed best for radiation-based estimation in the arid desert, whereas the Kharrufa model was most effective for tem","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"60 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134957270","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}
{"title":"Closure to “Air–Water Flows and Head Losses on Stepped Spillways with Inclined Steps”","authors":"Yvan Arosquipa-Nina, Rui Shi, Davide Wűthrich, Hubert Chanson","doi":"10.1061/jidedh.ireng-10129","DOIUrl":"https://doi.org/10.1061/jidedh.ireng-10129","url":null,"abstract":"","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135011312","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}
Pub Date : 2023-07-01DOI: 10.1061/jidedh.ireng-10045
Amin Gharehbaghi, Redvan Ghasemlounia
{"title":"Closure to “Application of AI Approaches to Estimate Discharge Coefficient of Novel Kind of Sharp-Crested V-Notch Weirs”","authors":"Amin Gharehbaghi, Redvan Ghasemlounia","doi":"10.1061/jidedh.ireng-10045","DOIUrl":"https://doi.org/10.1061/jidedh.ireng-10045","url":null,"abstract":"","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135011318","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}
Pub Date : 2023-04-01DOI: 10.1061/jidedh.ireng-10094
Jingmei Zhang, Rongcai Tang, Ruidi Bai, Hang Wang
{"title":"Closure to “Transverse Nonuniformity of Air–Water Flow and Lateral Wall Effects in Quasi-Two-Dimensional Hydraulic Jump”","authors":"Jingmei Zhang, Rongcai Tang, Ruidi Bai, Hang Wang","doi":"10.1061/jidedh.ireng-10094","DOIUrl":"https://doi.org/10.1061/jidedh.ireng-10094","url":null,"abstract":"","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136383106","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}
Pub Date : 2023-04-01DOI: 10.1061/jidedh.ireng-10075
Joseph M. Sinclair, S. Karan Venayagamoorthy, Timothy K. Gates
{"title":"Closure to “Some Insights on Flow over Sharp-Crested Weirs Using Computational Fluid Dynamics: Implications for Enhanced Flow Measurement”","authors":"Joseph M. Sinclair, S. Karan Venayagamoorthy, Timothy K. Gates","doi":"10.1061/jidedh.ireng-10075","DOIUrl":"https://doi.org/10.1061/jidedh.ireng-10075","url":null,"abstract":"","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"237 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136382808","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}
Pub Date : 2023-02-01DOI: 10.1061/jidedh.ireng-10066
{"title":"Reviewers","authors":"","doi":"10.1061/jidedh.ireng-10066","DOIUrl":"https://doi.org/10.1061/jidedh.ireng-10066","url":null,"abstract":"","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136097244","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：