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APPROPRIATE LAW COST TECHNIQUES IN RURAL WATER SUPPLY SCHEMES

APPROPRIATE LAW COST TECHNIQUES IN RURAL WATER SUPPLY SCHEMES. H,M.GUNAPALA(E/A) RWS-Unit Monaragala MAHINDA DISSANAYAKE RWS-Unit Badulla. Why we need Law cost techniques ?. To minimized the overall cost in rural water supply scheme’s. What are the law cost techniques.

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APPROPRIATE LAW COST TECHNIQUES IN RURAL WATER SUPPLY SCHEMES

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  1. APPROPRIATE LAW COST TECHNIQUES IN RURAL WATER SUPPLY SCHEMES H,M.GUNAPALA(E/A) RWS-Unit Monaragala MAHINDA DISSANAYAKE RWS-Unit Badulla

  2. Why we need Law cost techniques ? • To minimized the overall cost in rural water supply scheme’s

  3. What are the law cost techniques FERROCEMENT TECHNIQUES COULD BE BEST OPTION • Ferrocement Ground reservoir's • Ferrocement elevated Tanks • Ferrocement roughing filter’s • Ferrocement Slow sand filter’s

  4. Other techniques • Plastic shell roughing filter’s • Plastic shell rainwater harvesting tank NEXT

  5. Ferrocement Ground reservoir's Back

  6. Ferrocement elevated Tanks Back

  7. Ferrocement roughing filter’s Back

  8. Ferrocement Slow sand filter’s Back

  9. Plastic shell roughing filter’s Back

  10. Plastic shell rainwater harvesting tank Back

  11. Sri Lanka chronological order • 1980 –Sarvodaya/Danida Project(capacity up to 10 - 15 Cm) • 1990 – CWSSP Project (capacity up to 40 Cm) • 1995-NWS&DB – Small town water supply and sanitation project (capacity up to 40 Cm) • 2000-NWS&DB – ADM 3rd project (capacity up to 100 Cm)

  12. How To Construct Ferrocement Tank ? • Tank Base • Tank wall • Tank Dome Parts of ferocement tank NEXT

  13. Tank Base Back

  14. Tank wall Back

  15. Tank Dome Back

  16. Construction mistakes occurred during construction period • Pipes arrangement (inlet,outlet &wash out pipe) not placing correct place • Tank wall not align correctly • Dome is not construct ' correct shape • Wall thickness is increased than recommended thickness • 4.5 mm dia GI wire not connected to base properly • 4.5 mm dia GI wire is not fixed to the wall in correct distance • Neglect water cement ratio • Neglect quality of materials • Curing is not done properly NEXT

  17. Pipes arrangement (inlet,outlet &wash out pipe) not placing correct place Back

  18. Tank wall not align correctly Back

  19. Dome is not construct ' correct shape Back

  20. 4.5 mm dia GI wire not connected to base properly Back

  21. 4.5 mm dia GI wire is not fixed to the wall in correct distance Back

  22. Out comes of construction mistakes • Tank will be out of shape • Water leak can be occurred • Construction cost would be increased • Durability of the tank would be decreased NEXT

  23. Tank will be out of shape BACK

  24. Water leak can be occurred BACK

  25. Comparison of ferocement tank &concrete tank(ADB 3rd project-Monaragala) • Table -01 • Table -02 NEXT

  26. BACK

  27. BACK

  28. How to repair ferrocement tanks

  29. How to repair ferrocement tanks VIDEO – 01 VIDEO – 02 VIDEO – 03

  30. Advantages of ferrocementtechnolloogy • Law cost for general types of constructions • Simplicity in technology • Not much skill labour required • Required tools and equipment can be found easily • Light weight and therefore easy handling • Easy repairs and maintenance • Adequate strength for rural development • Adequate durability • Protection against sunshine and flooding • Easy removal

  31. Other Application of ferrocement techniques • Intake well dome • Water pond • Patrician wall • Domestic water storage tank • Rainwater harvesting tanks • toilets • Chlorine house NEXT

  32. Intake well dome BACK

  33. intake well dome VIDEO BACK

  34. Water pond BACK

  35. Patricians wall BACK

  36. Domestic water storage tank BACK

  37. Rainwater harvesting tanks BACK

  38. toilets BACK

  39. BACK

  40. Other application-foreign countries

  41. Other application-foreign countries

  42. Other application-foreign countries

  43. THANK YOU

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