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| Titel |
Proving the possibility of using Delft3D in irrigation systems simulations |
| VerfasserIn |
Shaimaa Theol, Francisco Suryadi, Charlotte de-Fraiture, Bert Jagers |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250148412
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| Publikation (Nr.) |
 EGU/EGU2017-12666.pdf |
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| Zusammenfassung |
| Irrigation system’s performance and sustainability are highly affected by sediment
deposition. A significant amount of research has been carried out regarding non-cohesive
sedimentation in rivers, coastal, estuaries and irrigation canals. For cohesive sediments,
research has been undertaken only in rivers and estuaries, but not in irrigation canals.
Also most of mathematical models are used for rivers, few models are used for
irrigation canals. There is hardly any mathematical model that simulates cohesive
sediments in irrigation systems. From literature review it was found that Delft3d model,
which is originally designed for rivers, is suitable because it can simulate cohesive
sediments and it deals with networks, also because of the big similarities between
rivers and irrigation systems. This study verifies the possibility of using Delft3d in
simulation of irrigation canals from a hydrodynamic and morphodynamic points of
view. For this purpose the Delft3D model was applied to a hypothetical case study
where a main canal feeds one branch canal to simulate flow in several canals with
different sizes. In scenario 1 and 2 it is assumed that no sediment is in the system
and its results are compared with other results obtained from mathematical model
which is originally used in irrigation canals named DUFLOW model. The results
of scenario 1 and 2 were too close to each other and the flow was steady in the
canal, therefore based on the results of the comparison it can be stated that Delft3d
model is suitable to be used in irrigation systems from hydrodynamic point of view.
After getting these satisfactory results and proved ability of delft3d, scenario 3 were
taken assuming cohesive sediments enter an irrigation systems with concentration
equal to 0.05 kg/m3. Delft3d gave good image about cohesive sediments behaviour,
so it can be stated that Delft3d model is suitable to be used in irrigation systems
from morphodynamic point of view despite some constrains As a forward step,
more studies need to be done on cohesive sedimentation in irrigation canals using
delft3d model, since it has been proven that this model can be used in irrigation
systems.
Keywords: Sediment deposition, Delft3D model, Cohesive sediments, DUFLOW model,
Comparison. |
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