Plover Cove Reservoir

Plover Cove Reservoir
Name	Plover Cove Reservoir
Location	New Territories, Hong Kong
Type	reservoir
Catchment	Tolo Harbour, Tolo Channel, Mirs Bay
Basin countries	Hong Kong
Area	27 km2 (including sea)
Volume	230 million m3
Date-built	1960s
Coordinates	22°29′N 114°12′E

Plover Cove Reservoir

Plover Cove Reservoir is a large coastal impoundment in the northeastern New Territories of Hong Kong, built by enclosing a natural cove to create one of Asia’s first sea-water-to-freshwater conversion reservoirs. The project connects to a network of reservoirs, reservoirs’ treatment works, and conveyance structures serving Hong Kong Island, Kowloon, and the New Territories, and has been central to regional water supply planning alongside projects such as the Mainland China–Hong Kong water supply agreements and the High Island Reservoir. The site has influenced urban expansion in Sha Tin, Tai Po, and North District, while intersecting with conservation designations like Plover Cove Country Park and recreational corridors to Tolo Harbour.

History

The idea for converting a natural sea inlet into a freshwater supply emerged after water shortages in the 1950s influenced policymakers associated with Sir Robert Black's administration and engineers trained at institutions like Imperial College London and Trinity College Dublin. The plan was part of a broader postwar infrastructure push that included projects referenced in reports by the Public Works Department (Hong Kong) and consultants from Mott, Hay and Anderson. Construction commenced in the early 1960s under colonial-era authorities, overlapping with social developments in Kwun Tong and the expansion of public housing programs by the Hong Kong Housing Authority. The reservoir opened in the mid-1960s, contemporaneous with the construction of the Cross-Harbour Tunnel and the development of the New Territories Development Department’s rural policies. Subsequent decades saw upgrades tied to the 1980s and 1990s water resource strategies negotiated alongside the Sino-British Joint Declaration era planning.

Geography and Hydrology

Situated between the headlands of Tolo Channel and the mainland near Sha Tau Kok Road, the reservoir occupies a flooded cove originally connected to Tolo Harbour and the open waters of Mirs Bay. The catchment includes streams from ranges such as Pat Sin Leng and Ma On Shan, and it drains via spillways into channels that feed into the Shing Mun River system and other watercourses relevant to Tai Po District. Hydrologically, the impoundment required analysis of tidal regimes from Tide Cove and saline intrusion patterns studied by engineers collaborating with academics from The University of Hong Kong and The Chinese University of Hong Kong. Seasonal monsoon pulses from the South China Sea influence inflow variability, while the reservoir’s storage buffers against droughts documented in historical drought events affecting Hong Kong.

Design and Construction

The project design combined earthen dams, concrete cuttings, and lockable barrage gates to isolate the cove from Tolo Harbour. Notable engineering features mirror techniques applied in large embankment works studied at King’s College London and in projects like the Hollandse Ijssel estuarine control schemes. Contractors included firms with track records on regional infrastructure, influenced by standards from the Institution of Civil Engineers and practices taught at Dublin Institute of Technology alumni networks. Construction required road realignments linking to Clear Water Bay Road-adjacent corridors and resettlement of small villages under the oversight of colonial authorities. The freshwater conversion relied on phased flushing, diversion of freshwater from local streams, and construction of intake towers and pipelines compatible with the Waterworks Ordinance (Hong Kong) regulations of the era.

Infrastructure and Operation

Operational infrastructure comprises dams, sluices, intake towers, treatment works, and a web of transmission mains connecting to treatment plants that serve Sha Tin and adjacent urban zones. The facility integrates with the regional supply grid influenced by agreements with Guangdong authorities and feeds into storage and distribution managed by the Water Supplies Department (Hong Kong). Routine operations include salinity monitoring, sediment management, and coordination with nearby reservoirs such as High Island Reservoir and Tai Lam Chung Reservoir during drought contingency plans linked to intergovernmental water supply arrangements. Emergency protocols reference standards from bodies like the International Commission on Large Dams.

Environmental Impact and Ecology

The conversion of a marine cove into a freshwater reservoir transformed local habitats, affecting estuarine species common to Tolo Harbour and migratory pathways used by fishes documented in surveys by researchers from The University of Hong Kong and Hong Kong University of Science and Technology. Surrounding terrestrial areas include secondary forests and scrub that form part of Plover Cove Country Park, home to species catalogued by the Agriculture, Fisheries and Conservation Department (Hong Kong), and studies have assessed impacts on benthic communities and water quality parameters similar to assessments used in Pearl River Delta studies. Mitigation measures included habitat management, buffer zones, and monitoring programs coordinated with conservation NGOs such as World Wide Fund for Nature regional offices and local naturalist groups that have worked alongside academic partners on biodiversity inventories.

Recreation and Tourism

The reservoir and adjacent country park form a hub for outdoor activities, attracting hikers from trail networks linking to MacLehose Trail segments, cyclists using rural roads toward Tai Mei Tuk, and anglers near designated piers with licensing overseen by the Agriculture, Fisheries and Conservation Department (Hong Kong). Visitor facilities connect to cultural tourism routes visiting nearby villages and heritage sites documented by the Antiquities and Monuments Office (Hong Kong). Events and guided walks often coordinate with community groups and organizations like the Hong Kong Tourism Board and local scout associations that promote eco-tourism while referencing regional attractions including Sai Kung and Tsim Sha Tsui museums.

Management and Future Developments

Management responsibility rests with the Water Supplies Department (Hong Kong), in coordination with the Civil Engineering and Development Department (Hong Kong) and environmental authorities. Future development plans emphasize resilience to climate variability, integration with inter-regional water projects linked to Guangdong–Hong Kong water cooperation frameworks, and upgrades to monitoring technologies inspired by research centers at The Chinese University of Hong Kong and The University of Hong Kong. Proposals under discussion involve improved catchment management, reinforced infrastructure aligned with International Panel on Climate Change projections, and continued balancing of water supply priorities with conservation objectives advocated by stakeholders including local District Councils and environmental NGOs.

Category:Reservoirs in Hong Kong Category:New Territories