Five things you perhaps didn’t know about water!

In preparation of the World Water Day on 22 March 2017 we have listed five things you perhaps did not know about water.

This list is based on some of the lectures that Lund University will present during a symposium for 350 highschool students. The symposium on March 22 will discuss both today’s and future water challenges and end with a workshop for teachers.

Water is vital. But can also be deadly.
Human beings are not to drink more than one litre of water per hour. That is because our kidneys are not able to produce more than just over a tablespoon of urine per minute. If we drink more water than that, and do not lose some of it by sweating, it reduces the salt content in our bodily fluids. Our cells will then attempt to level the salt content by absorbing more water, which causes them to swell and take up more space. This first becomes noticeable in the brain where, because of the resistance from the skull, the pressure rises and blood flow decreases. The symptoms are initially headaches, nausea and dizziness, but in severe cases water intoxication can lead to convulsions, coma and death.

Harmful bacteria in our drinking water can make us ill. But did you know that water also contains “gentle bacteria”?
A glass of clean drinking water contains millions of harmless bacteria. Research in applied microbiology and water resources engineering shows the enormous diversity of species of bacteria in our water, and that the bacteria appear to play a larger role than previously believed. Researchers suspect that a large part of the water purification takes place in the pipes and not only in water purification plants. This means that in the future we may be able to control the quality of our raw water so that the beneficial bacteria are able to clean even more efficiently than they do today.

Water shortages caused by drought affect different countries to different degrees.
In 2007–2009 there was drought in Syria, Iraq and Turkey. But the shortage of water affected the countries to various degrees. In Syria, many people worked in agriculture, but a lot of the farming, of for instance cotton, had not been adapted to the water supply. Before the drought, the government raised the price of diesel fuel which was needed to pump water. The population was therefore hit very hard by the drought, and many could not afford to irrigate their crops. Iraq imports much of its food, which makes the country less vulnerable to water shortages. In Turkey, agriculture had been modernised and they were able to use water from artificial ponds for irrigation during the drought.

Rain water (surface water) affects cities in different ways. How can we build cities to manage and take advantage of the rain that falls?

The amount of surface water varies, which makes the management of it complex. A heavy rain can cause flooding, while a long period of drought can cause water shortages in surface water facilities. Therefore, it is important to build systems that can handle a varied flow. A surface water facility can, for instance, be designed so that you can go sledding on it during the winter, and a town square can be used as a flooding area during heavy rain.

A five-minute shower can consume 70–100 litres of water. But did you know that a new type of shower can both purify its own water and save up to 90% of the water?
The water in the new shower runs down into the floor drain, is cleaned and pumped back through the shower nozzle. As a result, five litres of water is enough for a 10-minute shower. Furthermore, the energy consumption is reduced by 80% when the hot water is re-used instead of being pumped off to a wastewater plant. The shower was developed by Mehrdad Mahdjoubi, founder and director of Orbital Systems. He studied industrial design at the Faculty of Engineering at Lund University.

Lund University highlights World Water Day!

Lund University presents research and innovations to upper-secondary school students and teachers on World Water Day, 22 March 2017. The day will be held at Lund City Hall and includes lectures, workshops and discussions on current and future water challenges, with 350 students and teachers. About the event in Swedish.

The morning lectures include the Swedish Society for Nature Conservation, Sydvatten, VA Syd, Orbital Systems, and the Lund University Centre for Sustainability Studies (LUCSUS), and will be broadcast live.

In the afternoon, there will be workshops for teachers and others involved in water issues. Participation requires an invitation

This will be a closed event.

Det här inlägget postades i English, Världsvattendagen. Bokmärk permalänken.

Skriv en Kommentar

* Obligatoriskt