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File:Homemade waterfilter.jpg

Summary

Description
English: A hand-drawn picture of a diy-waterfilter, which can be made in the field with commonly available materials (branches, cloth, sand, charcoal and grass). It can be used to filter (slightly contaminated/polluted) water so that it is safe for drinking. Charcoal can be produced from wood by the indirect (preferred method) and the direct method. The direct method is easiest and requires only wood, an open fire and some plant material to allow the wood to burn up incompletely (see this website for links). The indirect method (which produces far less smoke and is healthier for environment and the person making the coal) is found here and here. The picture has been drawn after a model from Peter Darman's The Survival Handbook.
Date 16 June 2008
Source Own work
Author KVDP


Licensing

Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
In some countries this may not be legally possible; if so:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
The following pages on Schools Wikipedia link to this image (list may be incomplete):

Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.
Image title KONICA MINOLTA DIGITAL CAMERA
Camera manufacturer KONICA MINOLTA
Camera model DiMAGE Z6
Exposure time 1/50 sec (0.02)
F-number f/2.8
ISO speed rating 50
Date and time of data generation 07:29, 16 June 2008
Lens focal length 5.859375 mm
Orientation Normal
Horizontal resolution 72 dpi
Vertical resolution 72 dpi
Software used GIMP 2.4.5
File change date and time 08:08, 16 June 2008
Y and C positioning Centered
Exposure Program Normal program
Exif version 2.2
Date and time of digitizing 07:29, 16 June 2008
APEX brightness 4.5
Exposure bias 0
Maximum land aperture 3 APEX (f/2.83)
Metering mode Pattern
Light source Unknown
Flash Flash did not fire, auto mode, red-eye reduction mode
Colour space sRGB
Custom image processing Normal process
Exposure mode Auto exposure
White balance Auto white balance
Digital zoom ratio 0
Focal length in 35 mm film 35 mm
Scene capture type Standard
Contrast Normal
Saturation Normal
Sharpness Normal
Subject distance range Macro

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