. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 52 PS5 is offset 10m PS2 Lagoon. 12 15f 7000' \6 1460 9 14500 .1? 22000 7 5; 1850 ' 3850 25400 12 HI7 15* HI1 18 Horizontal Scale: 1 : 5000 Vertical Scale: 1 200 21 *- 3300 13100 19500 (Electrical Conductivity lor Scawater « 46000 umhos/cm) Ocean Mean Sea Level 950 ?^V -.»-»â "' \ Electrical Conductivity = 2600 umhos/cm (Base of Fieshwatei Zone) '200 / 15800 00/\ ' \Electrica ..? 12J _â -.*- Ginc Cover 60 dia. PVC pip* â ! surface Ltvtl (for Salinity tests) / 1* 600-1000 1 1000 dia (approx) manhole &qu
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 52 PS5 is offset 10m PS2 Lagoon. 12 15f 7000' \6 1460 9 14500 .1? 22000 7 5; 1850 ' 3850 25400 12 HI7 15* HI1 18 Horizontal Scale: 1 : 5000 Vertical Scale: 1 200 21 *- 3300 13100 19500 (Electrical Conductivity lor Scawater « 46000 umhos/cm) Ocean Mean Sea Level 950 ?^V -.»-»â "' \ Electrical Conductivity = 2600 umhos/cm (Base of Fieshwatei Zone) '200 / 15800 00/\ ' \Electrica ..? 12J _â -.*- Ginc Cover 60 dia. PVC pip* â ! surface Ltvtl (for Salinity tests) / 1* 600-1000 1 1000 dia (approx) manhole "9wU .VJ i_- Water Table 160 [Concrete base T its) / Cover with good seal for pump well .r- ^ PVC Reducing Tee -Maximum 100 metres - Pump suction â p = Meter :=j\ Pump/ Meter TTT .1500 dia. (approx I cone, pump well To supply Ground Surface o-.^(-?V1-'" Backfill ^-^300- ^- Float switch Jmbx AppiOR 300 \ | Concrete base J Ij50 )00 ,50 â 225 slotted PVC pipe .1 (Class 6 water supply pipe) Mean Sea Level (MSL) .Water Table \rl-o 30 NOTES: 1. All joints between pipes and pump wells/manholes to be well sealed 2. Float switch level to be as close abuve base of pump suction as possible (without causing vortexl 3. Optional housing over pump well and pump/meter (not shown) 4. All figures in mm but drawing not to scale (relative to MSL) Impermeable membrane liliick polytnene sheet) placed across trench. about 100-200 above top of pipe Figure 33. Cross-section through typical Home Island infiltration Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Press; National Research Council (U. S. ). Pacific Science Board; Smithsonian Institution; National Museum of Natural History (U. S. ); United States. Bureau of Sport Fisheries and Wildlife. Washington, D. C. : [Smithsonian
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