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DG City Fact: History of Flooding

As Dongguan continues to endure its wet season, look at how past and current generations have dealt with flood control.

As 82% of Dongguan’s annual precipitation cascades between April and September, many residents may have quickly realized the abundance and severity of the floods.

So, how would Dongguan do in the face of torrential rains?

Looking back at Dongguan’s history with flood control, our ancestors proved successful. In Shuiwei Fang, Humen, it has never flooded. Spread out in a shape of “丰,” the village’s open-cut drains are over 20 cm in width and 10 cm in depth. Rain and sewage flow down into the moat surrounding the village. When the moat’s water level surpasses 1.3 meters, a hidden valve would open automatically to discharge to external waters.

Photo Credit @jason_x.j

Photo Credit @jason_x.j

Today, there are 131 easily flooded points caused by clogged discharge openings, outdated draining facilities, pumping station deficiency, and a high-water level on the periphery of Dongguan, according to Dongguan Water Affairs Bureau. In 2012, the Dongguan government invested 300 million RMB on waterlogging control, with more money put in since then. By the end of September 2020, 1,272 villages out of 1,343 had finished rain and sewage diversion projects and construction of closed conduits. Regulation schemes and contingency plans coping with floods are gradually taking place in line with the city’s specialized 10-year plan on drainage system improvement from 2014 to 2025.