Sungai Liku

Sungai Liku is a small coastal nature tourism park (Taman Wisata Alam, TWA) in the Paloh area of Sambas Regency, northern West Kalimantan, Indonesia, covering about 7 square kilometres along the coast near the South China Sea. Designated around 2000 and managed by BKSDA West Kalimantan under Indonesia's Ministry of Environment and Forestry, the park protects coastal forest, beach and mangrove habitats and provides for nature-based recreation. The Paloh coastline is internationally important for sea-turtle nesting and encompasses 63 kilometres of beach that is the longest sea-turtle nesting site in Indonesia, and Sungai Liku forms part of this conservation-rich coastal zone. ^[1] The town of Paloh lies about 8 kilometres away.

The park and its coastal surroundings are notable for marine and coastal wildlife, particularly sea turtles. ^[1] The Paloh coast hosts green turtles (Chelonia mydas), the dominant species with thousands landing each year, and hawksbill turtles (Eretmochelys imbricata), which also nest on Paloh beaches. Nesting is concentrated from May to October. ^[2] The coastal forest and shore support shorebirds, seabirds, fiddler crabs and other coastal fauna. The combination of beach, forest, mangrove and nearshore waters creates a productive habitat mosaic, with turtle conservation a defining feature of the area.

Vegetation comprises coastal and beach forest, with strand vegetation such as pandanus, beach morning-glory and casuarina along the sandy shore, backed by lowland coastal forest. Mangroves fringe sheltered tidal areas, with species including api-api (Avicennia spp.), tinjang (Rhizophora apiculata), soneratia (Sonneratia alba), nyirih (Xylocarpus granatum) and tancang (Bruguiera gymnorrhiza) documented in the park. ^[1] These coastal plant communities stabilise the shoreline and provide cover important to nesting turtles and coastal wildlife.

Sungai Liku lies on a low coastal plain along the northern West Kalimantan shore, formed of recent marine and alluvial sediments with sandy beaches fronting the South China Sea. The flat, near-sea-level terrain is shaped by waves, tides and river outflow, and the sandy beaches are the key geomorphic feature, providing nesting grounds for sea turtles. The coastline is dynamic, influenced by monsoon-driven sea conditions.

The park has a maritime equatorial climate, hot and humid year-round with sea-moderated temperatures generally in the high-20s to low-30s Celsius. Rainfall is high and spread across the year, with the wettest and roughest conditions during the northeast monsoon from around November to March, when strong onshore winds affect the coast. Sea and weather conditions strongly influence both visitor access and turtle-nesting activity.

The Paloh coast is home to Malay and other coastal communities whose livelihoods are tied to fishing and the sea. The region's beaches have long been used by local people, and in recent decades the area has become a focus of community-based sea-turtle conservation, with local enumerators patrolling beaches during the May to October nesting season. ^[1] This blend of traditional coastal livelihoods and turtle protection shapes the social context of the park.

Sungai Liku was designated a nature tourism park (Taman Wisata Alam) around 2000 to protect a stretch of the conservation-rich Paloh coast and provide for low-impact coastal recreation. It is managed by BKSDA West Kalimantan under Indonesia's Ministry of Environment and Forestry (KLHK/KSDAE). Its designation complements broader efforts to safeguard the Paloh turtle-nesting coastline, which extends over 63 kilometres and is nationally recognised as Indonesia's longest turtle nesting site. ^[1]

The park's main attractions are its beaches, coastal scenery and the opportunity to experience one of Indonesia's premier sea-turtle nesting coasts, where conservation activities such as monitored nesting and hatchling release take place in the wider Paloh area during the May-October season. ^[1] Visitors come for beach recreation and nature appreciation within a setting where turtle protection is paramount. Activities are managed to avoid disturbing nesting turtles.

Facilities are basic and oriented toward nature and coastal experience. Access is via Paloh, about 8 kilometres away, reached by road from Sambas and the wider northern West Kalimantan coast. Visitors should coordinate with BKSDA West Kalimantan and local conservation groups, particularly when activities overlap with sensitive turtle-nesting periods from May to October.

Sungai Liku and the surrounding Paloh coast are vital for green-turtle conservation, protecting nesting beaches along 63 kilometres of coastline. ^[1] Threats include egg poaching, coastal development, marine pollution, plastic debris, fishing bycatch and disturbance of nesting females, alongside climate-driven changes to beaches and sea levels. BKSDA West Kalimantan, together with community groups and conservation partners, focuses on protecting nesting beaches, reducing poaching and promoting responsible coastal tourism.