MULTIMEDIA
Slide packs
Sediment control:
Exclusion and extraction of sediment from irrigation canals
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A set of 24 slides illustrates the sediment problems met by irrigation engineers, and some of the exclusion and extraction devices that have been developed to overcome or reduce these problems. The slide pack includes notes on each slide and an overview of the subject. It is intended for use by students and teachers.
Produced by HR Wallingford, UK.
Sediment monitoring:
Definitions, designs and uses
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This set of 24 slides shows examples of the different techniques available for the monitoring of sediment in irrigation or water resources projects. It also covers the kind of conditions likely to be associated with various catchment sizes. The slide pack includes notes on each slide and an overview of the subject. It is intended for use by students and teachers.
Produced by HR Wallingford, UK.
Soil erosion
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Soil erosion has a major, detrimental impact on agricultural productivity and on water resource infrastructure such as dams and river diversion structures. The slides in this pack provide examples of the causes, effects and prevention of soil erosion. The pack is intended to enable a teacher or lecturer to base teaching material on practical situations. The slide pack includes notes on each slide and an overview of the subject.
Produced by HR Wallingford, UK.
Irrigation and the environment:
The effects on weeds, health and sediment
Output summary View slides This set of 24 slides provides examples of how environmental problems resulting from the introduction of irrigation to a site are recognised and the attempts that are being made to overcome them. The slide pack includes notes on each slide and an overview of the subject.
Produced by HR Wallingford, UK.
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MULTIMEDIA
Videos
Measurement for irrigation water management
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A 25 minute video describing how improved water measurement and the feedback of information between managers, field staff and farmers can improve the equity of supply and water use efficiency. The video is intended as a training resource.
Produced by HR Wallingford, UK.
Sediment discharge measurement
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The 14 minute video starts by describing the problems caused by excessive sediment in rivers and canals. The ways in which sediments of different sizes travel and the theory of sediment transport are illustrated to show the differences between wash load, suspended load and bed load. The theory is then developed into a field technique to quantify the sediment discharge at a particular site. The pump sampling method of measurement, developed by HR Wallingford, is then described.
Produced by HR Wallingford, UK.
Soil erosion measurement - a drainage basin approach
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The first part of this 25 minute video describes the conditions that promote
erosion, how erosion depends on both the quantity and intensity of rainfall and the means of reducing the effects of rainfall through land husbandry. The second half of the film describes techniques for measuring sediment, the amount of water running off the catchment and rainfall. The video is intended as a training resource.

Produced by HR Wallingford, UK.