MAILBAG
A simple way to measure water evaporation
Sir ~ I refer to the reader ' s letter entitled How can I calculate the evaporation in the Dec / Jan edition . I worked at the Dept of Water Affairs & Forestry and the annual evaporation for the Gauteng area was 1 300mm
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Cullinan . We went to Cullinan Chemist , which was not yet open ( outside their official trading hours ). Despite the time , the chemist was opened and I was assisted without any delay or question — I was not even asked for any money upfront , and I could see that it was the prime mission of the chemist to stabilize me and prevent my body from going into shock . I am so grateful to the staff of to 1 500mm per annum , or about 3mm per day . Please note that it is dependent on various factors such as temperature , humidity , wind etc . To get the daily evaporation for your area , make a small dam1mx1mx0,3mdeepin
Cullinan Chemist – thank you ; you made the medical profession proud . As for Wadrift Clinic – I have no words to describe how disgusting I find the staff actions there . You are a filthy disgrace to the medical profession . Maybe this whole situation was created because I am an elderly white person ? Maybe this situation was caused by the fact that we have untrained , uncommitted , useless people a good sunny spot . Install a ruler or tape measure on the side . Take daily readings on the ruler at the same time each day , or weekly . When you fill it up again , take the lower reading and the add water and measure the new reading from which to
CLINIC manning our clinics ? Is someone going to do something about this ? I doubt it – Seemsthisistheway things are done at clinics ! I do hope that this writing of mine could save someone one day in an emergency – DO NOT go to your local clinic for an emergency – they do NOT understand the word “ emergency ”. Thanks to the staff at Cullinan Chemist I can write this letter ! DJ Scholtz De Wagensdrift calculate your evaporation over the period of measurement . That ' s why one doesn ' t want to fill up the Vaal Dam completely . Due to its large surface area the water loss from evaporation is very great . Stephen By email
7 www . sasmallholder . co . za