This is an archival version of the original KnowledgePoint website.

Interactive features have been disabled and some pages and links have been removed.

Visit the new KnowledgePoint website at https://www.knowledgepoint.org.

 

Revision history [back]

click to hide/show revision 1
initial version
RedR TSS gravatar image
RedR TSS

Sanitary Seals around self-supply tube-wells

Dear RedR Experts

We have received a query from Michael, a graduate student at the University of South Florida (Tampa, Florida, USA) working/living in Madagascar and studying the self-supply manually-drilled well, pitcher pump market there

He is interested in sanitary seals and sanitary aprons around self-supply tube-wells. His project involves the design of low-cost well head protection for unsubsidized self-supply pitcher pumps in Madagascar and is looking for research information on the effects of sanitary aprons on water quality. To date, his literature search has uncovered minimal relevant documentation on sufficient/low-cost wellhead protection for household/self-supply tubewells.

His question, then, is "Are there any studies, grey literature, or other documents that give justification for minimal sizes, depths, and other design parameters of sanitary aprons or sanitary seals on tube-wells in any context?"

Most textbooks, documents, and experts on the subject of sanitary aprons for wells in a development aid context recommend sanitary aprons around 2m in diameter. Is there justification for this choice (e.g. tests of water quality from wells of aprons of different sizes/designs or engineering analysis of the design)? Is there a reason to choose a 2m sanitary apron over a 1m or 1/2 m sanitary apron? Or is this choice based off an engineering practice with no specific justification besides experience in knowing that an approximately 2m well apron size is sufficient?

Michael is looking particularly for justification and not recommendations.

If you can help, please post your answer on the RedR-Knowledge Point website or eMail technical.support@redr.org.uk

Thanks and regards

Leigh Jones RedR TSS-Knowledge Point

click to hide/show revision 2
No.2 Revision
Cristian Anton gravatar image
WaterAid

Sanitary Seals seals around self-supply tube-wells

Dear RedR Experts

We have received a query from Michael, a graduate student at the University of South Florida (Tampa, Florida, USA) working/living in Madagascar and studying the self-supply manually-drilled well, pitcher pump market there

He is interested in sanitary seals and sanitary aprons around self-supply tube-wells. His project involves the design of low-cost well head protection for unsubsidized self-supply pitcher pumps in Madagascar and is looking for research information on the effects of sanitary aprons on water quality. To date, his literature search has uncovered minimal relevant documentation on sufficient/low-cost wellhead protection for household/self-supply tubewells.

His question, then, is "Are there any studies, grey literature, or other documents that give justification for minimal sizes, depths, and other design parameters of sanitary aprons or sanitary seals on tube-wells in any context?"

Most textbooks, documents, and experts on the subject of sanitary aprons for wells in a development aid context recommend sanitary aprons around 2m in diameter. Is there justification for this choice (e.g. tests of water quality from wells of aprons of different sizes/designs or engineering analysis of the design)? Is there a reason to choose a 2m sanitary apron over a 1m or 1/2 m sanitary apron? Or is this choice based off an engineering practice with no specific justification besides experience in knowing that an approximately 2m well apron size is sufficient?

Michael is looking particularly for justification and not recommendations.

If you can help, please post your answer on the RedR-Knowledge Point website or eMail technical.support@redr.org.uk

Thanks and regards

Leigh Jones RedR TSS-Knowledge Point

click to hide/show revision 3
retagged
KnowledgePointAdmin gravatar image
RedR CCDRR

Sanitary seals around self-supply tube-wells

Dear RedR Experts

We have received a query from Michael, a graduate student at the University of South Florida (Tampa, Florida, USA) working/living in Madagascar and studying the self-supply manually-drilled well, pitcher pump market there

He is interested in sanitary seals and sanitary aprons around self-supply tube-wells. His project involves the design of low-cost well head protection for unsubsidized self-supply pitcher pumps in Madagascar and is looking for research information on the effects of sanitary aprons on water quality. To date, his literature search has uncovered minimal relevant documentation on sufficient/low-cost wellhead protection for household/self-supply tubewells.

His question, then, is "Are there any studies, grey literature, or other documents that give justification for minimal sizes, depths, and other design parameters of sanitary aprons or sanitary seals on tube-wells in any context?"

Most textbooks, documents, and experts on the subject of sanitary aprons for wells in a development aid context recommend sanitary aprons around 2m in diameter. Is there justification for this choice (e.g. tests of water quality from wells of aprons of different sizes/designs or engineering analysis of the design)? Is there a reason to choose a 2m sanitary apron over a 1m or 1/2 m sanitary apron? Or is this choice based off an engineering practice with no specific justification besides experience in knowing that an approximately 2m well apron size is sufficient?

Michael is looking particularly for justification and not recommendations.

If you can help, please post your answer on the RedR-Knowledge Point website or eMail technical.support@redr.org.uk

Thanks and regards

Leigh Jones RedR TSS-Knowledge Point