On the effectiveness of the investigation method of underground temperature survey for detecting leakage places of water at an old reservoir.

Abstract

There are about 250,000 reservoirs being utilized water in Japan.These reservoirs, mainly the bank of these reservoirs, are progressing in deterioration with the lapse of time after their construction. Many reservoirs have been occurring functional disorder by leakage of water near the end of the bank. In many case, the leakage of water occurres at vein streams existing in the bank.

Identification of groundwater microbes that decrease the concentration of the conservative tracer uranine

“…They have also been used to delineate catchment areas [ 6 ] and study groundwater trajectories and active conduit networks in karst aquifers and caves [ 7 , 8 ]. Furthermore, they have been used to evaluate pipe flow [ 9 ], investigate leaks from reservoirs [ 10 ], and examine the behavior of contaminants (e.g., pesticides) in surface water [ 11 , 12 ]. Recently, fluorescent dyes have been used as tracers to distinguish between drilling fluid and on-site groundwater in deep subsurface borehole drilling [ 3 , [13] , [14] , [15] , [16] , [17] , [18] ], and as non-adsorbable tracers to compare with the behavior of adsorbable tracers in borehole-based solute transport tests [ 19 , 20 ].…”