Ho Pui Reservoir, Irrigation reservoir in Hong Kong

Ho Pui Reservoir is an irrigation reservoir at 250 metres in the hills of Pat Heung, Yuen Long, within Tai Lam Country Park. Its S-shaped dam is 157 metres long and 17.4 metres high, with a 19-opening spillway. The reservoir holds 500,000 cubic metres and has a small island in the middle.

In the 1960s the government diverted the Kam Tin River to increase supply to Tai Lam Chung Reservoir, cutting irrigation water downstream. Four irrigation reservoirs were then built for Pat Heung farmers, and Ho Pui was completed and opened in 1961. In May 2001 vandals broke the lock and opened the sluice, draining the pond dry and killing all its fish.

The reservoir's Cantonese name, Ho Pui, is shared with the village at the trailhead, and the site remains an irrigation reservoir for farmland in the northwest New Territories. The Family Walk is known for its bamboo grove, and the reservoir was named one of the ten best natural landscapes in Hong Kong's country parks in 1998.

Reach the site by taking the MTR to Yuen Long Station, then catching a minibus to Ho Pui Tsuen village at the trailhead. The walk is easy and suitable for all ages, taking roughly 30 to 40 minutes to complete the loop with gentle elevation and shaded sections throughout.

The reservoir's S-shaped spillway has 19 openings, a feature noted since its 1961 completion. In May 2001, vandals broke the lock and opened the sluice, draining the pond; it was Hong Kong's first recorded case of malicious damage to a reservoir sluice. Because it is an irrigation reservoir, patrols were infrequent, and the Water Supplies Department subsequently reinforced the cage security.