Pub Date : 2020-12-29DOI: 10.22541/au.160923930.05876665/v1
J. Almedeij
The NRCS abstraction method is based on two assumptions. The first is that the ratio of actual water retention after ponding to maximum potential retention after ponding is equal to the ratio of actual surface runoff to potential surface runoff. The second assumption is that the initial abstraction for the watershed is twenty percent of the maximum potential retention. This study shows that both assumptions violate continuity principles and proposes a modification that renders an elementary relationship accounting for all abstraction forms by dividing them into a variable and constant components. Consequently, the surface runoff computation becomes dependent on the soil initial moisture content and implicitly influenced by the initial abstraction, while retaining the advantage of the subjective selection of curve number from extensive database from which the NRCS method has gained popularity. A new time of concentration model is also proposed to extend the computation for flood hydrograph generation.
{"title":"Modified NRCS Abstraction Method for Flood Hydrograph Generation","authors":"J. Almedeij","doi":"10.22541/au.160923930.05876665/v1","DOIUrl":"https://doi.org/10.22541/au.160923930.05876665/v1","url":null,"abstract":"The NRCS abstraction method is based on two assumptions. The first is\u0000that the ratio of actual water retention after ponding to maximum\u0000potential retention after ponding is equal to the ratio of actual\u0000surface runoff to potential surface runoff. The second assumption is\u0000that the initial abstraction for the watershed is twenty percent of the\u0000maximum potential retention. This study shows that both assumptions\u0000violate continuity principles and proposes a modification that renders\u0000an elementary relationship accounting for all abstraction forms by\u0000dividing them into a variable and constant components. Consequently, the\u0000surface runoff computation becomes dependent on the soil initial\u0000moisture content and implicitly influenced by the initial abstraction,\u0000while retaining the advantage of the subjective selection of curve\u0000number from extensive database from which the NRCS method has gained\u0000popularity. A new time of concentration model is also proposed to extend\u0000the computation for flood hydrograph generation.","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"17 1","pages":"04021042"},"PeriodicalIF":0.0,"publicationDate":"2020-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88851790","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 : 2020-12-01DOI: 10.1061/(ASCE)IR.1943-4774.0001514
X. Leng, H. Chanson
AbstractAlthough waterway connectivity is a requirement for all freshwater fish, culverts have had negative impacts on freshwater river ecology. Following a recent biological study suggesting that ...
{"title":"Asymmetrical Wall Baffles to Assist Upstream Fish Passage in Box Culvert: Physical Modeling","authors":"X. Leng, H. Chanson","doi":"10.1061/(ASCE)IR.1943-4774.0001514","DOIUrl":"https://doi.org/10.1061/(ASCE)IR.1943-4774.0001514","url":null,"abstract":"AbstractAlthough waterway connectivity is a requirement for all freshwater fish, culverts have had negative impacts on freshwater river ecology. Following a recent biological study suggesting that ...","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"21 1","pages":"04020037"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74285217","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 : 2020-12-01DOI: 10.1061/(asce)ir.1943-4774.0001520
F. Salmasi, J. Abraham
AbstractSlide gates are commonly used to adjust flow in open canals. The discharge coefficient (Cd) for a slide gate is a function of the gate’s geometric and hydraulic characteristics. For free fl...
{"title":"Expert System for Determining Discharge Coefficients for Inclined Slide Gates Using Genetic Programming","authors":"F. Salmasi, J. Abraham","doi":"10.1061/(asce)ir.1943-4774.0001520","DOIUrl":"https://doi.org/10.1061/(asce)ir.1943-4774.0001520","url":null,"abstract":"AbstractSlide gates are commonly used to adjust flow in open canals. The discharge coefficient (Cd) for a slide gate is a function of the gate’s geometric and hydraulic characteristics. For free fl...","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"15 1","pages":"06020013"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80741987","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 : 2020-12-01DOI: 10.1061/(ASCE)IR.1943-4774.0001517
S. Pagliara, M. Palermo, D. Roy
AbstractIn-stream low-head hydraulic structures are eco-friendly solutions to maintain the natural aquatic ecosystems. This study focused on scour characteristics around double-winged log -frames u...
{"title":"Scour around Double-Winged Log Frames under Clear Water Condition","authors":"S. Pagliara, M. Palermo, D. Roy","doi":"10.1061/(ASCE)IR.1943-4774.0001517","DOIUrl":"https://doi.org/10.1061/(ASCE)IR.1943-4774.0001517","url":null,"abstract":"AbstractIn-stream low-head hydraulic structures are eco-friendly solutions to maintain the natural aquatic ecosystems. This study focused on scour characteristics around double-winged log -frames u...","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"42 1","pages":"04020038"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81862741","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 : 2020-12-01DOI: 10.1061/(asce)ir.1943-4774.0001519
D. Chin
AbstractPrevious research has identified five canonical rainfall distributions in the United States; however, identification of these rainfall distributions did not include any rainfall data in the...
摘要先前的研究已经确定了美国的五种典型降雨分布;然而，这些降雨分布的识别不包括任何降雨数据在…
{"title":"Updated Canonical Rainfall Distributions in the United States","authors":"D. Chin","doi":"10.1061/(asce)ir.1943-4774.0001519","DOIUrl":"https://doi.org/10.1061/(asce)ir.1943-4774.0001519","url":null,"abstract":"AbstractPrevious research has identified five canonical rainfall distributions in the United States; however, identification of these rainfall distributions did not include any rainfall data in the...","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"23 1","pages":"06020012"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82778436","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 : 2020-12-01DOI: 10.1061/(ASCE)IR.1943-4774.0001510
L. Guiot, L. Cassan, G. Belaud
AbstractTo promote water control in coastal areas developed for agriculture, tidal hydraulic structures (doors and flap gates) are used for the hydraulic management of irrigation and drainage netwo...
摘要为促进沿海农业开发地区的治水工作，采用潮汐水工结构(门和扇门)对灌排管网进行水力管理。
{"title":"Modeling the Hydromechanical Solution for Maintaining Fish Migration Continuity at Coastal Structures","authors":"L. Guiot, L. Cassan, G. Belaud","doi":"10.1061/(ASCE)IR.1943-4774.0001510","DOIUrl":"https://doi.org/10.1061/(ASCE)IR.1943-4774.0001510","url":null,"abstract":"AbstractTo promote water control in coastal areas developed for agriculture, tidal hydraulic structures (doors and flap gates) are used for the hydraulic management of irrigation and drainage netwo...","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"6 1","pages":"04020036"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73475453","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 : 2020-12-01DOI: 10.1061/(asce)ir.1943-4774.0001518
M. Bijankhan, V. Ferro
{"title":"Erratum for “Experimental Modeling of Submerged Pivot Weir” by M. Bijankhan and V. Ferro","authors":"M. Bijankhan, V. Ferro","doi":"10.1061/(asce)ir.1943-4774.0001518","DOIUrl":"https://doi.org/10.1061/(asce)ir.1943-4774.0001518","url":null,"abstract":"","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"55 1","pages":"08220006"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73175320","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 : 2020-12-01DOI: 10.1061/(ASCE)IR.1943-4774.0001513
Ratan Sarmah, Ainal Hoque Gazi
AbstractA steady-state analytical solution is proposed for computing three-dimensional seepage into a partially penetrating ditch drainage system receiving water from an uneven ponding field of fin...
摘要:本文提出了一种计算部分穿透式沟渠排水系统三维渗流的稳态解析解。
{"title":"Analytical Steady-State Solution for a Three-Dimensional Partially Penetrating Ditch Drainage System Receiving Water from an Uneven Ponding Field","authors":"Ratan Sarmah, Ainal Hoque Gazi","doi":"10.1061/(ASCE)IR.1943-4774.0001513","DOIUrl":"https://doi.org/10.1061/(ASCE)IR.1943-4774.0001513","url":null,"abstract":"AbstractA steady-state analytical solution is proposed for computing three-dimensional seepage into a partially penetrating ditch drainage system receiving water from an uneven ponding field of fin...","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"1 1","pages":"06020011"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91528182","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 : 2020-11-01DOI: 10.1061/(asce)ir.1943-4774.0001507
E. Bautista, J. Schlegel
AbstractA solute transport model has been added to the WinSRFR surface irrigation software package. The model uses advective-dispersive principles to predict the flow of solute with the irrigation ...
{"title":"Modeling Solute Transport in the WinSRFR Surface Irrigation Software","authors":"E. Bautista, J. Schlegel","doi":"10.1061/(asce)ir.1943-4774.0001507","DOIUrl":"https://doi.org/10.1061/(asce)ir.1943-4774.0001507","url":null,"abstract":"AbstractA solute transport model has been added to the WinSRFR surface irrigation software package. The model uses advective-dispersive principles to predict the flow of solute with the irrigation ...","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"5 1","pages":"04020035"},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88374586","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 : 2020-11-01DOI: 10.1061/(asce)ir.1943-4774.0001511
Yu Bai, Y. Zeng, Qian Li
AbstractDrainage ditches are effective agricultural facilities because they can drain excess water from the field, and an eco-friendly drainage ditch can also eliminate agricultural nonpoint source...
摘要排水沟是一种有效的农业设施，因为它可以排走农田多余的水，生态排水沟还可以消除农业面源污染。
{"title":"Retaining Performance of Four Types of Drainage Ditch on Phosphorus: Field Work","authors":"Yu Bai, Y. Zeng, Qian Li","doi":"10.1061/(asce)ir.1943-4774.0001511","DOIUrl":"https://doi.org/10.1061/(asce)ir.1943-4774.0001511","url":null,"abstract":"AbstractDrainage ditches are effective agricultural facilities because they can drain excess water from the field, and an eco-friendly drainage ditch can also eliminate agricultural nonpoint source...","PeriodicalId":16260,"journal":{"name":"Journal of Irrigation and Drainage Engineering-asce","volume":"57 1","pages":"04020034"},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90168625","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}
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