Lau Shui Heung Reservoir, Irrigation reservoir in New Territories, Hong Kong

Lau Shui Heung Reservoir is a small irrigation reservoir in Pat Sin Leng Country Park, North District, Hong Kong, built in 1968 as part of the Plover Cove Reservoir programme. It covers about 3.5 hectares and holds some 170,000 cubic metres, held back by a 24 m high, 54.9 m long concrete main dam and a 7.3 m high, 39 m long secondary dam. Rows of melaleuca trees line the still, green water, whose smooth surface mirrors the wooded slopes above.

Construction began in 1966 and finished in 1968 as part of the Plover Cove Reservoir engineering programme. The scheme collected water from the northwestern slopes of Pat Sin Leng and transferred it through a tunnel toward Hok Tau and Plover Cove, while the reservoir itself irrigated nearby farmland. In April 2018 it dried out completely, its bed cracked and walkable, after a dry winter and village irrigation; rain from Tropical Storm Ewiniar refilled it that June.

The Lau Shui Heung Country Trail, about 4.4 km long and roughly two hours end to end, starts and finishes near the reservoir. Green minibus 52B between Fanling Station and Hok Tau passes the reservoir on the way. Facilities nearby include a pavilion, campsite, barbecue and picnic areas and toilets.

In April 2018 hikers found the reservoir bed cracked and dry enough to walk across to the far bank. The Water Supplies Department blamed low winter rainfall and irrigation by nearby villagers, while some suspected the Lung Shan Tunnel works had drained groundwater. Rain from Tropical Storm Ewiniar refilled the 170,000 m³ basin by early June.