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Groundwater Dams can be used as a macro-catchment rainwater harvesting technology in arid and semi-arid areas.

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Zusammenfassung

Groundwater dams are structures that intercept or obstruct the natural flow of groundwater and provide underground storage. They can therefore be used as a macro-catchment rainwater harvesting technology in arid and semi-arid areas. The main two types are: subsurface dams and sand storage dams. They have successfully been used in several parts of the world, most notably India, Africa and Brazil.

Switch on your loudspeakers/headset for this interactive multimedia lecture, which consists of 4 parts. At the end of the lecture, you have a chance to test your knowledge in the lecture quiz.

Background on Underground Water Storage Dams

Instead of storing water in surface reservoirs, water is stored underground. This is the main principle behind groundwater dams. The main advantage of such storage is that evaporation losses are significantly lower compared to open reservoirs. They are also the most reliable method to prevent saltwater intrusion. Furthermore, since parasites cannot breed in underground water, the risk of waterborne diseases is reduced. The submergence of land, a problem which is normally associated with surface dams, is not present with sub-surface dams.

However, groundwater dams are not a universally applicable solution, as they require specific conditions in order to properly function. Ideally, they should be built in areas where rainwater from a large catchment area flows through a narrow passage. The best construction sites are where the soil consists of sands and gravel, with rock or a permeable layer at a depth of a few metres.

About the Lecturer

Josep de Trincheria is a PhD candidate at the Institute of Wastewater Management and Water Protection. The topic of his doctoral thesis is the technical evaluation and design optimisation of subsurface dams and sand storage dams in Kenya and Zimbabwe. In addition, he has work experience in different African countries, including Eritrea, Kenya, Mozambique, Zimbabwe, Nigeria and Ethiopia. He is currently working as an Emergency WASH Officer at the UN International Organization for Migration.

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In case you feel like you have mastered this topic, but would still like to know more about rural development, please have a further look at the material on our website.

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Inhalt

Groundwater Dams in Arid and Semi-arid Areas, Part 1: Potential and Significance Groundwater Dams in Arid and Semi-arid Areas, Part 2: Subsurface Dams and Sand Storage Dams Groundwater Dams in Arid and Semi-arid Areas, Part 3: Key Performance Factors Groundwater Dams in Arid and Semi-arid Areas, Part 4: Siltation in Sand Storage Dams Groundwater Dams in Arid and Semi-arid Areas Quiz

Methodik

The multimedia lectures are envisioned as a virtual classroom, where students attend the lectures given by guest lecturers. During the lectures, students have the opportunity to test their knowledge in short quizzes. Lectures are usually concerned with broader and more interconnected topics and designed to provide you with comprehensive knowledge on various topics related to rural development and reviving the rural.

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Lernziele

RUVIVAL produces e-learning material concerned with sustainable rural development. The project exists since 2016 as part of the Hamburg Open Online University (HOOU). The RUVIVAL Team produces the material at the Institute of Wastewater Management and Water Protection (AWW) as part of the Hamburg University of Technology (TUHH).

The aim is to spread knowledge on sustainable practices. This e-learning website gives you the tools to implement sustainable practices in the area of sanitation, water and soil conservation.

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Nähere Informationen

Veröffentlicht am

September 19, 2019

Sprachen

Englisch

Autor*innen

Josep de Trincheria

RUVIVAL Team

LRMI Metadaten

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