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Concerns raised as reservoirs hit full

PHUKET: The volume of rainfall has seen the water rise to dangerously high levels at Phuket’s three main reservoirs, Phuket Irrigation Office Chief Thammanoon Bamrungpetch said yesterday (Oct 17).

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By The Phuket News

Tuesday 18 October 2022, 10:53AM


Mr Thammanoon inspected Bang Wad reservoir in Kathu yesterday, where he explained that excess water at the reservoir was already being released, but at a slow rate.

However, if the volume of water flowing entering the reservoirs continues at the same rate, his office will have no choice but to increase the volume of water being discharged, Mr Thammanoon said.

“It will be necessary to release water [from the reservoirs] for the stability of the dams and for public safety, which is the primary concern,” he said.

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Water can be emptied from Bang Wad by either natural overflow over the spillway or by a drainage system installed with pipes under the dam. 

“Staff have to closely observe and assess the situation and control the amount of water discharged at all times in order not to affect the area at the end of the dam,” Mr Thammanoon said.

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christysweet | 19 October 2022 - 10:09:16

Huh? Reservoirs are just artificial  lakes with sloping sides scooped out of the earth- no concrete involved I know of two such near me that were filled in the last few years for Mc Villa development. Now at least 50 rai of the Layan flood plain is being razed for more condo project is there not already a glut? 

Timothy | 19 October 2022 - 10:08:12

Charles, it would make no difference in pressure at the spillway no matter how deep the lake (reservoir) was. The water at the top of the lake doesn't magically gain more pressure because there is more water below. The concrete spillway is only at the top few meters. The pressure would not change.

JohnC | 19 October 2022 - 09:34:57

@Minimind. Dams in the rest of the world are as deep as natural land contours and surrounding hills allow. Besides, the dam is the structure holding the water in the RESERVOIR. If they can build a dam high enough then the water catchment area will also be deep. Most of the biggest dams in the world have huge lakes behind them and evaporation is only an issue in hotter climates. Go back to school.

Kurt | 19 October 2022 - 09:31:21

Yes Charles, with deepening reservoirs comes of course a whole scenario of wall's strengthening  with it. It will be a complete reservoir renovation. I know that, but didn't elaborated that in my comment.

maverick | 19 October 2022 - 09:22:37

Dam it to many experts on this forum :-) 

charles | 18 October 2022 - 22:47:19

Kurt you obviously don't understand hydrodynamics, its not as simple as just digging the reservoir deeper. The dam wall would need to be reinforced as the increased water pressure would break it 

megamind | 18 October 2022 - 19:27:13

In the rest of theworld the dam are deep with small surface to reduce evaporation. Here, where they know very well the matter, is the opposite.

Kurt | 18 October 2022 - 11:29:46

Recalling the photo's of the empty Phuket reservoirs last time, its a pity that when the right time and opportunity was there the reservoirs were not deepened.

 

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