The Use of Delft3D to Simulate the Deposition of Cohesive and Non-Cohesive Sediments in Irrigation Systems: 1st Edition (Paperback) book cover

The Use of Delft3D to Simulate the Deposition of Cohesive and Non-Cohesive Sediments in Irrigation Systems

1st Edition

By Shaimaa Abd Al-Amear Theol

CRC Press

148 pages

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Paperback: 9780367496913
pub: 2020-04-15
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Sediment deposition threatens the performance of many irrigation systems. Because of the high impact on irrigation performance and crop production, many studies have been done on how to deal with sediment deposition. In this research, the Delft3D model, originally developed for hydro-morphologic modeling of rivers and estuaries, was adapted for the use in irrigation systems simulations and applied to different case studies. This research addresses two shortcomings of previous studies of sediments in irrigation systems. Firstly, while previous studies primarily used 1D models, this research uses a 2D/3D model. The use of 2D/3D models in irrigation systems is significant because the non-uniform flow around structures such as offtakes, weirs and gates, leads to asymmetric sedimentation patterns that are missed by 1D simulations. Secondly, whereas previous studies mostly considered non-cohesive sediments, this research simulates cohesive, non-cohesive and a mix of both sediment types. This is important for irrigation systems that draw water from natural rivers that carry a mix of cohesive and non-cohesive sediments. The findings of this research are important for irrigation system maintenance and gate operation. It is also essential for the development of canal operating plans that meet crop water requirements and at the same time minimizes sediment deposition by alternating gates.

Table of Contents

1 Thesis summary

2 Introduction

3 The use of Delft3D for irrigation systems simulations

4 The use of 2D/3D models to show the differences between cohesive and non-cohesive sediments in irrigation systems

5 What is the effect of gate selection on the non-cohesive sedimentation in an irrigation schemes?

6 The role of gate operation in reducing problems with cohesive and non-cohesive sediments in irrigation canals

7 Conclusions and recommendations

8 References

About the Author

Shaimaa Abd Al-AMear Theol is a Ph.D. fellow in the Water Science and Engineering Department/ Land and Water Development for Food Security in IHE Delft, and Wageningen University & research in the Netherlands. She obtained MSc in Hydraulic Engineering from IHE-Delft (was named UNESCO-IHE), Delft, the Netherlands in the year 2011. Her study abroad is fully supported by the Iraqi Ministry of Higher Education and Scientific Research. She has a background in engineering. Her primary research interests are the cohesive and non-cohesive impacts on the irrigation systems, and the 2D/3D modelling in irrigation systems.

About the Series

IHE Delft PhD Thesis Series

IHE Delft PhD programme leads to a deepening of a field of specialisation. PhD fellows do scientific research, often with conclusions that directly influence their region. At IHE Delft, PhD researchers from around the world participate in problem-focused and solution-oriented research on development issues, resulting in an inspiring research environment. PhD fellows work together with other researchers from many countries dealing with topics related to water and the environment.

PhD research is often carried out in the ‘sandwich’ model. Preparation and final reporting – the first and last portion of the programme – are carried out in Delft, while actual research is done in the fellow’s home country, under co-supervision of a local institute. Regular contacts with the promotor are maintained through visits and long-distance communication. This enables researchers to employ solutions directly to problems in their geographical region.

IHE Delft PhD degrees are awarded jointly with a university. The degrees are highly valued and fully recognised in all parts of the world.

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Subject Categories

BISAC Subject Codes/Headings:
SCIENCE / Environmental Science
TECHNOLOGY & ENGINEERING / Environmental / Water Supply