The classic – Developing Groundwater – now available online – free of charge

The classic book and practical manual Developing Groundwater: A guide for rural water supply by Alan MacDonald, Jeff Davies, Roger Calow and John Chilton is now available online from the Practical Action website for free download.

 Published in 2005 it provides a user-friendly guide to the topic of groundwater development, bringing together the wide range of techniques required to develop groundwater for community water supplies. It provides information on effective techniques for siting wells and boreholes, assessing the sustainability of sources, constructing and testing the yield of boreholes and wells, and monitoring groundwater quality. The authors set the technical aspects of rural water supply firmly in their socio-economic context, so that readers can take proper account of community concerns as well as purely engineering questions. Packed with helpful illustrations this book is indispensable for all rural water supply project staff in developing countries.

Please let others know about it!

The British Geological Survey, UNICEF, WaterAid and Skat joined hands with Practical Action to get publication this into the public domain.

Happy reading – it is a good one.

 

Here is the link in full: http://www.developmentbookshelf.com/doi/book/10.3362/9781780441290

10 things to know about groundwater: 9 & 10

Hidden Treasure: 10 reasons to know more about groundwater / 2 priorities to take seriously – briefing note

What to find out more or get involved? Join the RWSN Sustainable Groundwater Development community on Dgroups.

9. In rural areas groundwater is often the cheapest source of safe drinking water

The capital cost of a borehole and handpump is about USD40 per person (say USD1.50 per person per year). The recurrent costs are about USD4.50 per person per year. The total is about USD6.00 per person per year. Piped schemes cost about twice as much.

[Source: WASHCost Working Paper 8, 2013, IRCwash.org]

10. In urban areas many people use shallow ground-water despite the fact that it is very vulnerable to pollution

The high cost of connection to piped water services makes it more attractive to use a private well despite the poor water quality

New Picture

[Source: Danert, K, Adekile, D and Gesti Canuto, J (2014) Manually Drilled Boreholes: Providing water in Nigeria’s Megacity of Lagos and Beyond, Skat Foundation http://www.rural-water-supply.net/en/resources/details/618]

10 things to know about groundwater: 8

Hidden Treasure: 10 reasons to know more about groundwater / 2 priorities to take seriously – briefing note

8. More people use groundwater for drinking than use rain water or surface water

About half the population of Africa and Asia use groundwater directly from springs, wells and boreholes, while an unknown additional number served by piped systems enjoy groundwater use.

[Source: UNICEF/WHO, JMP, 2015 www.wssinfo.org/]

What you can do:

Join the conversation through the RWSN Sustainable Groundwater Development community

10 things to know about groundwater: 7

Hidden Treasure: 10 reasons to know more about groundwater / 2 priorities to take seriously – briefing note

GROUNDWATER is the water stored in the pores and other openings in rocks below ground. It is a precious resource which must be safeguarded for the benefit of mankind

7. In some cases recharge does not occur at the present day, and so any abstraction is effectively ‘mining’ groundwater

In very dry regions with no active recharge a decision may be taken to mine groundwater, but, as is the case with oil or gas, once the water is used it will not be replenished.

gw_mining

10 things to know about groundwater: 5&6

Hidden Treasure: 10 reasons to know more about groundwater / 2 priorities to take seriously – briefing note

GROUNDWATER is the water stored in the pores and other openings in rocks below ground. It is a precious resource which must be safeguarded for the benefit of mankind.

5. Some of the groundwater recharge can be safely abstracted for human use

Even the smallest abstraction reduces the natural outflow by an equivalent amount, but a certain level of water abstraction may be judged to be acceptable.

6. Deciding how much groundwater is exploitable depends on many factors. Three main options exist:

  1. Sustainable yield
  2. Mixed strategy
  3. Mining

gw_strategies

What you can do:

Join the conversation through the RWSN Sustainable Groundwater Development community

10 things to know about groundwater: 3 & 4

Hidden Treasure: 10 reasons to know more about groundwater / 2 priorities to take seriously – briefing note

GROUNDWATER is the water stored in the pores and other openings in rocks below ground. It is a precious resource which must be safeguarded for the benefit of mankind.

gw3

3. If no abstraction (pumping) takes place, then recharged water discharges naturally to swamps, streams and rivers

This natural outflow is important because it sustains springs and river flows in dry periods and supports wetland ecosystems (lakes and swamps) which are important to people and livestock.

Reliable river flows and lake levels are also critical for hydropower; cooling of thermal power plants; water transport and fisheries.

4. Water in streams, rivers and lakes and groundwater are closely connected

  • Globally about 25% of the flow in rivers comes from groundwater
  • Globally about 90% of groundwater recharge joins rivers

Rivers may be fed by groundwater, or they may feed groundwater. Whether a stream is gaining or losing depends on location and time of year.

groundwater-rivers

What you can do:

Join the conversation through the RWSN Sustainable Groundwater Development community

 

10 things to know about groundwater: #2

Hidden Treasure: 10 reasons to know more about groundwater / 2 priorities to take seriously – briefing note

GROUNDWATER is the water stored in the pores and other openings in rocks below ground. It is a precious resource which must be safeguarded for the benefit of mankind.

recharge

2. However, from a water resource point of view, what matters is how much natural replenishment, or recharge, takes place

Recharge rates vary from a few to hundreds of millimetres per year. In dry regions recharge ranges from zero to a few mm per year.

In humid regions recharge rates represent a higher proportion of rainfall.

Find out more:

What you can do:

Join the conversation through the RWSN Sustainable Groundwater Development community: https://dgroups.org/RWSN/groundwater_rwsn

10 things to know about groundwater:#1

Hidden Treasure: 10 reasons to know more about groundwater / 2 priorities to take seriously – briefing note

GROUNDWATER is the water stored in the pores and other openings in rocks below ground. It is a precious resource which must be safeguarded for the benefit of mankind.

worldwater1

  1. Groundwater comprises 96% of all liquid fresh water on earth

Think of this groundwater stored beneath our feet as the savings in your bank, or the financial reserves of a nation.

Most (97%) of the world’s water is sea water. Two-thirds of the freshwater, is ice. Groundwater comprises 96% of the freshwater which we can utilise.

Find out more: