Picture 1: Abandoned quarry lakes (Source: Carolyn Chiam, June 2004)
"There are recently abandoned quarries that are gradually filling up with water (Picture 1). Each year, the water level rises and at the former HDB quarry near the Buddhist retreat - The Thai Temple - (sometimes called the Great Pool of Pulau Ubin) [editor's note: also known as Tian Ci], the water has now reached the brim and overflows into the sea (Picture 2). The other abandoned quarries, with smaller catchment areas, are filling slowly and the final water levels can be expected to fluctuate around the top of the underground water table level which will be close to the surface near the sea, but deeper on the hill tops."
Picture 2: Water levels at Tian Ci maxed out (Source: Ubin Stories Gallery, 9 Oct 2004)