15. Tabulated Data Cond. meter possibly needs lab calibration ELOG’s data needs comparing with external data for integrity check Resistivity data Off recommended range for SIND tool
16.
17. Example 1 - Batu Dam Showing “zero” conductivity readings before tool reaches water surface Slide 18: SIND data_run01 Slide 19: SIND data_run03 Depth: 1.0m-6.0m (air column)
18. Air column – “zero” conductivity Possible humidity effect Water surface (Tool’s min. range reached)
19. Air column – “zero” conductivity Possible humidity effect Water surface (Tool’s min. range reached)
20. EXAMPLE 2 - Batu Dam ELOG’s short resistivity vs. SIND’s derived resistivity in open water bodies Slide 21: SIND Data Slide 22: ELOG Data Depth: 18m-23m
21. 86Ohm.m ~11.9mS/m (119µS/cm) (Value couldn’t hit beyond 100Ohmm due to to tool’s max. range reached unlike ELOG)
23. EXAMPLE 3- KLT017 (alluvium) ELOG’s short resistivity vs. SIND’s derived resistivity in Alluvium Slide 24: SIND Data Slide 25: ELOG Data Depth: 61m-67m
26. EXAMPLE 4 - SK198 (hard-rock) ELOG’s short resistivity vs. SIND’s derived resistivity in hard rock. Slide 27: SIND Data Slide 28: ELOG Data Depth: 76m-82m
29. Conclusion 1. A consistent shift in resistivity values are observed from that of SIND & ELOG tools in alluvial and hardrock environment. 2. Recommended resistivity operating range for SIND’s tool is between 0 – 100 Ohmm. Readings are unreliable beyond the recommended range as shown in Batu Dam evaluation exercise.
30. Acknowledgements 1. DID, Northern Zone Div., Federal Territory – Tuan Hj Zul Mohamad, Mohd Ezla, Izrul Faris, Bachtiar Effendi & Mohd Shariff 2. DID, Water Resources Management and Hydrology dept., Ampang – Yuhaslin, Khairul Fadzilah
Notas do Editor
Batu Dam is DID’s rainfall and water level station#3117190. Therefore, no conductivity data collected and available for comparison
SIND tool side by side with flowmeter as comparison scale. Approximately 30mm in diameter