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    Effect of Infiltration on Sediment Transport in Irrigated Channels

    Source: Journal of Irrigation and Drainage Engineering:;2016:;Volume ( 142 ):;issue: 007
    Author:
    Kapil Rohilla
    ,
    K. S. Hari Prasad
    ,
    C. S. P. Ojha
    DOI: 10.1061/(ASCE)IR.1943-4774.0001018
    Publisher: American Society of Civil Engineers
    Abstract: This paper develops a numerical model for the analysis of sediment transport in irrigated channels. The overland flow equation considers infiltration into the subsurface. The model solves Saint Venant and sediment continuity equations to analyze overland flow and sediment transport, while Richard’s equation is used to analyze subsurface flow. Saint Venant and sediment continuity equations are solved using MacCormack-scheme-based finite-difference method and Richard’s equation is solved using a mass conservative fully implicit finite-difference method. The model is validated by comparing model-predicted aggradation with experimental observations. The model is used to study the effect of infiltration on aggradation of a channel bed during sediment-laden flows. It was observed that infiltration significantly affects and alters the aggradation phenomenon and aggradation considering infiltration is found to be higher than that without considering infiltration. Among the different unsaturated soil parameters, the saturated hydraulic conductivity and initial dryness of the soil were found to be the main factors affecting the sediment transport in irrigated channels.
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      Effect of Infiltration on Sediment Transport in Irrigated Channels

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4238770
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    contributor authorKapil Rohilla
    contributor authorK. S. Hari Prasad
    contributor authorC. S. P. Ojha
    date accessioned2017-12-16T09:07:00Z
    date available2017-12-16T09:07:00Z
    date issued2016
    identifier other%28ASCE%29IR.1943-4774.0001018.pdf
    identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4238770
    description abstractThis paper develops a numerical model for the analysis of sediment transport in irrigated channels. The overland flow equation considers infiltration into the subsurface. The model solves Saint Venant and sediment continuity equations to analyze overland flow and sediment transport, while Richard’s equation is used to analyze subsurface flow. Saint Venant and sediment continuity equations are solved using MacCormack-scheme-based finite-difference method and Richard’s equation is solved using a mass conservative fully implicit finite-difference method. The model is validated by comparing model-predicted aggradation with experimental observations. The model is used to study the effect of infiltration on aggradation of a channel bed during sediment-laden flows. It was observed that infiltration significantly affects and alters the aggradation phenomenon and aggradation considering infiltration is found to be higher than that without considering infiltration. Among the different unsaturated soil parameters, the saturated hydraulic conductivity and initial dryness of the soil were found to be the main factors affecting the sediment transport in irrigated channels.
    publisherAmerican Society of Civil Engineers
    titleEffect of Infiltration on Sediment Transport in Irrigated Channels
    typeJournal Paper
    journal volume142
    journal issue7
    journal titleJournal of Irrigation and Drainage Engineering
    identifier doi10.1061/(ASCE)IR.1943-4774.0001018
    treeJournal of Irrigation and Drainage Engineering:;2016:;Volume ( 142 ):;issue: 007
    contenttypeFulltext
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