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1-7 A chlorinator (Artist: Chatterton, Ken)   10-10 Pipeline profile from storage tank 2 (Artist: Chatterton, Ken)   10-11 Pipeline profile from junction 2 to standpost 2 (Artist: Chatterton, Ken)

1-7 A chlorinator
Artist: Chatterton, Ken
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10-10 Pipeline profile from storage tank 2
Artist: Chatterton, Ken
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10-11 Pipeline profile from junction 2 to standpost 2
Artist: Chatterton, Ken
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10-12 Negative pressure in pipeline caused by HGL  dropping below level of pipe (Artist: Chatterton, Ken)   10-13 Points in pipeline where air might collect and restrict flow (Artist: Chatterton, Ken)   10-2 Effect of pipe flow on pressure energy (Artist: Chatterton, Ken)

10-12 Negative pressure in pipeline caused by HGL dropping below level of pipe
Artist: Chatterton, Ken
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10-13 Points in pipeline where air might collect and restrict flow
Artist: Chatterton, Ken
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10-2 Effect of pipe flow on pressure energy
Artist: Chatterton, Ken
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10-3 Schematic profile of hydraulic gradient line (Artist: Chatterton, Ken)   10-4 Elevation of pipeline between storage tank and tapstand (Artist: Chatterton, Ken)   10-6 Hydraulic gradient line for design example (Artist: Chatterton, Ken)

10-3 Schematic profile of hydraulic gradient line
Artist: Chatterton, Ken
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10-4 Elevation of pipeline between storage tank and tapstand
Artist: Chatterton, Ken
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10-6 Hydraulic gradient line for design example
Artist: Chatterton, Ken
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10-7 Layout of a small gravity flow distribution network (Artist: Chatterton, Ken)   10-8 Pipeline profile from storage tank (Artist: Chatterton, Ken)   10-9 Pipeline profile from junction 1 to standpost 1 (Artist: Chatterton, Ken)

10-7 Layout of a small gravity flow distribution network
Artist: Chatterton, Ken
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10-8 Pipeline profile from storage tank
Artist: Chatterton, Ken
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10-9 Pipeline profile from junction 1 to standpost 1
Artist: Chatterton, Ken
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11-10 Digging a shallow well using compressed air to dewater (Artist: Chatterton, Ken)   11-11 Pump characteristics for large single impeller centrifugal pump (Artist: Chatterton, Ken)   11-12 Pipeline system curve (Artist: Chatterton, Ken)

11-10 Digging a shallow well using compressed air to dewater
Artist: Chatterton, Ken
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11-11 Pump characteristics for large single impeller centrifugal pump
Artist: Chatterton, Ken
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11-12 Pipeline system curve
Artist: Chatterton, Ken
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11-13 Comparison of head discharge curves for centrifugal and positive displacement pump (Artist: Chatterton, Ken)   11-14 Pumps connected together in a series (Artist: Chatterton, Ken)   11-15 Head discharge curves for three equal pumps connected (Artist: Chatterton, Ken)

11-13 Comparison of head discharge curves for centrifugal and positive displacement pump
Artist: Chatterton, Ken
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11-14 Pumps connected together in a series
Artist: Chatterton, Ken
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11-15 Head discharge curves for three equal pumps connected
Artist: Chatterton, Ken
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11-16 Pumps collected together in parallel (Artist: Chatterton, Ken)   11-17 Head discharge curves for three equal pumps connected (Artist: Chatterton, Ken)   11-1 Classification of pumps commonly used in emergency water supply (Artist: Chatterton, Ken)

11-16 Pumps collected together in parallel
Artist: Chatterton, Ken
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11-17 Head discharge curves for three equal pumps connected
Artist: Chatterton, Ken
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11-1 Classification of pumps commonly used in emergency water supply
Artist: Chatterton, Ken
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11-2 Diaphragm pump (Artist: Chatterton, Ken)   11-6 Multi-stage submersible pump (Artist: Chatterton, Ken)   11-7 Submersible electric pumps (Artist: Chatterton, Ken)

11-2 Diaphragm pump
Artist: Chatterton, Ken
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11-6 Multi-stage submersible pump
Artist: Chatterton, Ken
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11-7 Submersible electric pumps
Artist: Chatterton, Ken
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11-8 Progressive cavity pump mounted in borehole (Artist: Chatterton, Ken)   11-9 Compressed air operated diaphragm pump (Artist: Chatterton, Ken)   2-2 Maximum distance from household or water point (Artist: Chatterton, Ken)

11-8 Progressive cavity pump mounted in borehole
Artist: Chatterton, Ken
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11-9 Compressed air operated diaphragm pump
Artist: Chatterton, Ken
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2-2 Maximum distance from household or water point
Artist: Chatterton, Ken
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4-1 Flow measurement temporary dam (Artist: Chatterton, Ken)   4-2 Flow measurement (Artist: Chatterton, Ken)   4-3 Flow measurement - weirs (Artist: Chatterton, Ken)

4-1 Flow measurement temporary dam
Artist: Chatterton, Ken
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4-2 Flow measurement
Artist: Chatterton, Ken
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4-3 Flow measurement - weirs
Artist: Chatterton, Ken
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4-5 Rock distribution (Artist: Chatterton, Ken)   4-6 Cross-sectional representation of a weathered crystalline rock aquifer (Artist: Chatterton, Ken)   4-7 Drill pipe (Artist: Chatterton, Ken)

4-5 Rock distribution
Artist: Chatterton, Ken
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4-6 Cross-sectional representation of a weathered crystalline rock aquifer
Artist: Chatterton, Ken
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4-7 Drill pipe
Artist: Chatterton, Ken
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4-8 Saline Intrusion into groundwater close to the coast (Artist: Chatterton, Ken)   5-10 Infiltration trench filled with sand and gravel (Artist: Chatterton, Ken)   5-11 Infiltration well made of concrete rings sunk into the river bed (Artist: Chatterton, Ken)

4-8 Saline Intrusion into groundwater close to the coast
Artist: Chatterton, Ken
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5-10 Infiltration trench filled with sand and gravel
Artist: Chatterton, Ken
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5-11 Infiltration well made of concrete rings sunk into the river bed
Artist: Chatterton, Ken
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5-12 Infiltration well using a pipe with screened intake (Artist: Chatterton, Ken)   5-13 Bank side infiltration gallery (Artist: Chatterton, Ken)   5-14 Temporary weir made of sand bags (Artist: Chatterton, Ken)

5-12 Infiltration well using a pipe with screened intake
Artist: Chatterton, Ken
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5-13 Bank side infiltration gallery
Artist: Chatterton, Ken
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5-14 Temporary weir made of sand bags
Artist: Chatterton, Ken
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5-1 Problems caused if the pipe inlet is too near the surface (Artist: Chatterton, Ken)   5-2 Simple arrangements of pump section inlets (Artist: Chatterton, Ken)   5-3 Intake using side channel and screen (Artist: Chatterton, Ken)

5-1 Problems caused if the pipe inlet is too near the surface
Artist: Chatterton, Ken
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5-2 Simple arrangements of pump section inlets
Artist: Chatterton, Ken
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5-3 Intake using side channel and screen
Artist: Chatterton, Ken
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5-4 Prefabricated inlet strainer for a pipe (Artist: Chatterton, Ken)   5-5 Heat welding a fine mesh to the inlet of a water pipe (Artist: Chatterton, Ken)   5-6 Submersible pump (Artist: Chatterton, Ken)

5-4 Prefabricated inlet strainer for a pipe
Artist: Chatterton, Ken
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5-5 Heat welding a fine mesh to the inlet of a water pipe
Artist: Chatterton, Ken
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5-6 Submersible pump
Artist: Chatterton, Ken
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5-8 Infiltration well (Artist: Chatterton, Ken)   5-9 Hand dug well close to river bank drawing water from the aquifer connected to the river (Artist: Chatterton, Ken)   6-10 Kibble bucket for lifting and lowering material into wells (Artist: Chatterton, Ken)

5-8 Infiltration well
Artist: Chatterton, Ken
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5-9 Hand dug well close to river bank drawing water from the aquifer connected to the river
Artist: Chatterton, Ken
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6-10 Kibble bucket for lifting and lowering material into wells
Artist: Chatterton, Ken
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6-11 Constructing a shallow well showing use of tripod and winch for raising and lowering materials (Artist: Chatterton, Ken)   6-12 Lining a well in sections - concrete block work or brick (Artist: Chatterton, Ken)   6-14 Increasing the depth of existing well by caissoning (Artist: Chatterton, Ken)

6-11 Constructing a shallow well showing use of tripod and winch for raising and lowering materials
Artist: Chatterton, Ken
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6-12 Lining a well in sections - concrete block work or brick
Artist: Chatterton, Ken
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6-14 Increasing the depth of existing well by caissoning
Artist: Chatterton, Ken
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6-15 Increasing well yield by driving perforated pipes into well wall below aquifer (Artist: Chatterton, Ken)   7-10 Temporary water distribution point with rigid tank elevated on sand filled storage drums (Artist: Chatterton, Ken)   7-11 Raised platform for a storage tank supported by retaining wall of sand-filled sacks (Artist: Chatterton, Ken)

6-15 Increasing well yield by driving perforated pipes into well wall below aquifer
Artist: Chatterton, Ken
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7-10 Temporary water distribution point with rigid tank elevated on sand filled storage drums
Artist: Chatterton, Ken
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7-11 Raised platform for a storage tank supported by retaining wall of sand-filled sacks
Artist: Chatterton, Ken
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7-13 Below ground storage tank with synthetic liner (Artist: Chatterton, Ken)   7-4 Schematic layout of storage tank pipework (Artist: Chatterton, Ken)   7-5 Ball float valve fitted to inlet pipe (Artist: Chatterton, Ken)

7-13 Below ground storage tank with synthetic liner
Artist: Chatterton, Ken
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7-4 Schematic layout of storage tank pipework
Artist: Chatterton, Ken
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7-5 Ball float valve fitted to inlet pipe
Artist: Chatterton, Ken
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7-6 Tank outlet fitted with air vent (Artist: Chatterton, Ken)   7-7 Floating outlet (Artist: Chatterton, Ken)   7-8 Fabric cover to storage tank cutaway showing column and ropes (Artist: Chatterton, Ken)

7-6 Tank outlet fitted with air vent
Artist: Chatterton, Ken
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7-7 Floating outlet
Artist: Chatterton, Ken
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7-8 Fabric cover to storage tank cutaway showing column and ropes
Artist: Chatterton, Ken
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8-10 Oxfam clarifier using two 30 metre lengths of hose (Artist: Chatterton, Ken)   8-12 Layout of slow sand filter installed in a rigid framed prefabricated tank (Artist: Chatterton, Ken)   8-13 Process layout for using a slow sand filter (Artist: Chatterton, Ken)

8-10 Oxfam clarifier using two 30 metre lengths of hose
Artist: Chatterton, Ken
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8-12 Layout of slow sand filter installed in a rigid framed prefabricated tank
Artist: Chatterton, Ken
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8-13 Process layout for using a slow sand filter
Artist: Chatterton, Ken
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8-1 Linkage of water treatment processes for various stages in an emergency (Artist: Chatterton, Ken)   8-2 Parallel treatment processes (Artist: Chatterton, Ken)   8-3 Constant rate chlorinator (Artist: Chatterton, Ken)

8-1 Linkage of water treatment processes for various stages in an emergency
Artist: Chatterton, Ken
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8-2 Parallel treatment processes
Artist: Chatterton, Ken
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8-3 Constant rate chlorinator
Artist: Chatterton, Ken
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8-4 Displacement doser (Artist: Chatterton, Ken)   8-5 Simple spray aerator (Artist: Chatterton, Ken)   8-6 Batch sedimentation tank with diffuser inlet (Artist: Chatterton, Ken)

8-4 Displacement doser
Artist: Chatterton, Ken
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8-5 Simple spray aerator
Artist: Chatterton, Ken
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8-6 Batch sedimentation tank with diffuser inlet
Artist: Chatterton, Ken
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8-7 Locally constructed underground sedimentation tank (Artist: Chatterton, Ken)   8-9 Graph showing results of jar test (Artist: Chatterton, Ken)   9-2A Flat hose (Artist: Chatterton, Ken)

8-7 Locally constructed underground sedimentation tank
Artist: Chatterton, Ken
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8-9 Graph showing results of jar test
Artist: Chatterton, Ken
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9-2A Flat hose
Artist: Chatterton, Ken
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9-2B Semi-rigid hose (Artist: Chatterton, Ken)   9-2C Polythene pipe (Artist: Chatterton, Ken)   9-2D Unplasticised polyvinyl chloride pipe (Artist: Chatterton, Ken)

9-2B Semi-rigid hose
Artist: Chatterton, Ken
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9-2C Polythene pipe
Artist: Chatterton, Ken
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9-2D Unplasticised polyvinyl chloride pipe
Artist: Chatterton, Ken
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9-2E Galvanised steel pipe and coupling (Artist: Chatterton, Ken)   9-3A Globe valve (Artist: Chatterton, Ken)   9-3B Gate valve (Artist: Chatterton, Ken)

9-2E Galvanised steel pipe and coupling
Artist: Chatterton, Ken
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9-3A Globe valve
Artist: Chatterton, Ken
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9-3B Gate valve
Artist: Chatterton, Ken
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9-3C Ball valve (Artist: Chatterton, Ken)   9-3D Butterfly valve (Artist: Chatterton, Ken)   9-3E Ferrule strap (Artist: Chatterton, Ken)

9-3C Ball valve
Artist: Chatterton, Ken
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9-3D Butterfly valve
Artist: Chatterton, Ken
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9-3E Ferrule strap
Artist: Chatterton, Ken
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9-3F Ball float valve (Artist: Chatterton, Ken)   9-3G Non-return valve (Artist: Chatterton, Ken)   9-3H Air valve (Artist: Chatterton, Ken)

9-3F Ball float valve
Artist: Chatterton, Ken
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9-3G Non-return valve
Artist: Chatterton, Ken
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9-3H Air valve
Artist: Chatterton, Ken
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9-3I Pressure-reducing valve (Artist: Chatterton, Ken)   9-8 Examples of prefabricated tap stands (Artist: Chatterton, Ken)   9-9 Simple concrete standpost apron (Artist: Chatterton, Ken)

9-3I Pressure-reducing valve
Artist: Chatterton, Ken
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9-8 Examples of prefabricated tap stands
Artist: Chatterton, Ken
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9-9 Simple concrete standpost apron
Artist: Chatterton, Ken
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A centrifugal pump (Artist: Shaw, Rod)   A steel tube frame tank (Artist: Shaw, Rod)   A wire mesh emergency water supply tank v1 (Artist: Shaw, Rod)

A centrifugal pump
Artist: Shaw, Rod
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A steel tube frame tank
Artist: Shaw, Rod
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A wire mesh emergency water supply tank v1
Artist: Shaw, Rod
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A wire mesh emergency water supply tank v2 (Artist: Shaw, Rod)   Candle filters 1 (Artist: Shaw, Rod)   Container housed mobile water treatment plant (Artist: Shaw, Rod)

A wire mesh emergency water supply tank v2
Artist: Shaw, Rod
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Candle filters 1
Artist: Shaw, Rod
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Container housed mobile water treatment plant
Artist: Shaw, Rod
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Emergency water supply tank (Artist: Shaw, Rod)   Emergency water tank - Oxfam v1 (Artist: Shaw, Rod)   Emergency water tank - Oxfam v2 (Artist: Shaw, Rod)

Emergency water supply tank
Artist: Shaw, Rod
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Emergency water tank - Oxfam v1
Artist: Shaw, Rod
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Emergency water tank - Oxfam v2
Artist: Shaw, Rod
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Emergency water tank on a frame (Artist: Shaw, Rod)   Emergency water tank with two figures (Artist: Shaw, Rod)   Emergency water tank with two figures v2 (Artist: Shaw, Rod)

Emergency water tank on a frame
Artist: Shaw, Rod
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Emergency water tank with two figures
Artist: Shaw, Rod
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Emergency water tank with two figures v2
Artist: Shaw, Rod
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Emergency water treatment plant (Artist: Shaw, Rod)   Examining the turbidity of water (Artist: Shaw, Rod)   Floating water intake (Artist: Shaw, Rod)

Emergency water treatment plant
Artist: Shaw, Rod
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Examining the turbidity of water
Artist: Shaw, Rod
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Floating water intake
Artist: Shaw, Rod
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Group meeting around a table (Artist: Shaw, Rod)   JEK water tanker (Artist: Shaw, Rod)   Pillow or bladder storage tank (Artist: Shaw, Rod)

Group meeting around a table
Artist: Shaw, Rod
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JEK water tanker
Artist: Shaw, Rod
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Pillow or bladder storage tank
Artist: Shaw, Rod
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Pre-fabricated collapsible water storage tank (Artist: Shaw, Rod)   Prefabricated well lining (Artist: Shaw, Rod)   Rainwater catchment frame (Artist: Shaw, Rod)

Pre-fabricated collapsible water storage tank
Artist: Shaw, Rod
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Prefabricated well lining
Artist: Shaw, Rod
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Rainwater catchment frame
Artist: Shaw, Rod
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Rigid metal or plastic storage tank (Artist: Shaw, Rod)   Storage tank damaged by flooding (Artist: Shaw, Rod)   Storage tank on an artificial mound (Artist: Shaw, Rod)

Rigid metal or plastic storage tank
Artist: Shaw, Rod
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Storage tank damaged by flooding
Artist: Shaw, Rod
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Storage tank on an artificial mound
Artist: Shaw, Rod
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Submersible pump and portable generator v1 (Artist: Shaw, Rod)   Submersible pump and portable generator v2 (Artist: Shaw, Rod)   Tractor pulling a bed trailer carrying a bladder tank (Artist: Shaw, Rod)

Submersible pump and portable generator v1
Artist: Shaw, Rod
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Submersible pump and portable generator v2
Artist: Shaw, Rod
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Tractor pulling a bed trailer carrying a bladder tank
Artist: Shaw, Rod
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Trailer mounted mobile water treatment plant (Artist: Shaw, Rod)   Using a motorised pump to increase the pressure in a distribution main (Artist: Shaw, Rod)   Water supply intake destroyed by floods (Artist: Shaw, Rod)

Trailer mounted mobile water treatment plant
Artist: Shaw, Rod
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Using a motorised pump to increase the pressure in a distribution main
Artist: Shaw, Rod
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Water supply intake destroyed by floods
Artist: Shaw, Rod
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Water tanker (Artist: Shaw, Rod)   11-18 Schematic diagram of the working parts of a reciprocating piston hand pump (Artist: Shaw, Rod)   11-19 Workings of a suction lift handpump (Artist: Shaw, Rod)

Water tanker
Artist: Shaw, Rod
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11-18 Schematic diagram of the working parts of a reciprocating piston hand pump
Artist: Shaw, Rod
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11-19 Workings of a suction lift handpump
Artist: Shaw, Rod
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11-20 Normal working range for common handpumps (Artist: Shaw, Rod)     

11-20 Normal working range for common handpumps
Artist: Shaw, Rod
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