کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6409617 1629914 2016 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A new semi-Lagrangian routing procedure for constituent transport in steady and unsteady flow velocity fields
ترجمه فارسی عنوان
روش مسیریابی نیمه لاگرانژ جدید برای انتقال مؤلفه در زمینه های ثابت و غیرمتمرکز جریان
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


- A new routing procedure for constuituents propagation is presented.
- The routing procedure is based on the use of a moving Lagrangian framework.
- Both steady and unsteady hydraulic conditions can be accounted.
- BOD-DO systems is considered.
- The model is suited for real time pollutant concentrations forecasting.

SummaryIn this paper, a new numerical model for the simulation of constituent transport in both steady and unsteady flow conditions is presented. The transport model is a routing procedure in which the advection process is solved by means of the Lagrangian coordinate transformation, while the dispersion process is approximated within each time step by means of the convolution principle, exploiting a multilinear procedure. In order to facilitate the application of the Lagrangian coordinate transformation during unsteady flow conditions, the unsteady velocity field corresponding to the linearized parabolic approximation of the Saint Venant Equations is provided, taking into account appropriate boundary conditions. Finally, classic BOD-DO relationships are embedded into the routing procedure in order to perform water quality applications with reactive constituents. The model is first demonstrated with respect to a numerical water quality model in both steady and unsteady hydraulic conditions, and is then applied to two real-world cases. Because of its characteristics, the proposed model seems suitable for real time forecast of pollutant concentrations when an emergency event occurs, or for water quality management in real rivers.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 538, July 2016, Pages 216-230
نویسندگان
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