Image:Homemade waterfilter.jpg

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Size of this preview: 640 × 478 pixels
Full resolution‎ (2,472 × 1,848 pixels, file size: 223 KB, MIME type: image/jpeg)

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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.
Source	Own work by uploader
Date	16 June 2008
Author	KVDP
Permission ( Reusing this image)	see below

Licensing:

I, the copyright holder of this work, hereby release it into the public domain. This applies worldwide.

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I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

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File history

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	Date/Time	Dimensions	User	Comment
current	06:25, 16 June 2008	2,472×1,848 (223 KB)	KVDP	({{Information \|Description={{en\|1=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 t)

File links

The following pages on Schools Wikipedia link to this image (list may be incomplete):

Drinking water

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.

Camera manufacturer	KONICA MINOLTA
Camera model	DiMAGE Z6
Exposure time	1/50 sec (0.02)
F-number	f/2.8
Date and time of data generation	07:29, 16 June 2008
Lens focal length	5.859375 mm
Image title	KONICA MINOLTA DIGITAL CAMERA
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	1
Exposure Program	Normal program
ISO speed rating	50
Exif version	2.2
Date and time of digitizing	07:29, 16 June 2008
Brightness	4.5
Exposure bias	0
Maximum land aperture	3
Metering mode	Pattern
Light source	Unknown
Flash	88
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
Scene capture type	Standard
Contrast	Normal
Saturation	Normal
Sharpness	Normal
Subject distance range	Macro

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