I got a call from wife today to say that it is raining and water in my Koi pond is overflowing over the top and is seeping into the adjacent room. As I am in Hong Kong, I could not check why this happens. As she is not familiar with the operation of the drain pumps, the solution is to bail out the water by hand.
Later I heard that the North East monsoon has hit Singapore and a lot of rain has fallen. The evening news showed flooding in some parts of Singapore. I suspect the overflow pipe in my pond is probably too small to handle the sudden heavy downpour of rain. The 50mm diameter pipe, that works in normal situation to maintain the maximum water level, just could not handle the super heavy downpour today.
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