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Jelai-Bila River basin, Central Kalimantan, Indonesia
Indonesia, Central Kalimantan
The Jelai-Bila River, coursing through the wild heart of Borneo, is a remarkable natural wonder that plays a crucial role in the region’s ecology and culture. This river, less known to the world outside of Southeast Asia, is a vital artery of life, sustaining a diverse range of flora and fauna while also providing for the communities that live along its banks. Its waters are characteristic of blackwater rivers, known for their dark, tannin-rich color, which results from the decomposition of organic matter in the surrounding peat swamps and forests.
- Submitted by
- DionTre Speller
- Approved by
- Heiko Blessin, Heok Hee Ng & Greg Martin
- GPS
- -2.9876001, 110.7317810
- Geographical region
- Southeastern Asia
- Drainage Basin
- Java Sea
- River catchment
- Water body type
- River
- Water body name
- Jelai Bila
- Water body part
- River mouth
- Water body course
- Water body: tributary of
- Tributary name
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Water Chemistry
Water information
- Water type
- fresh-water
- Water color
- Black water
- Water transparency
- Medium
- Concentration of sediments
- Low
- Water temperature
- 23 °C
- Water flow/curent
- Slow
Chemical parameters
- pH
- 6.0
- Conductivity
- GH
- dGH
- KH
- dKH
- Dissolved Oxygen
Substrate in nature
- Sand
- Beige
- Pebble/Gravel
- Stone
- Mixed
- Stone form
- Roundish
- Silt/Mud
- Beige
- Leaves
- Many
- Driftwood
- Many
- Submerged terrestrial vegetation
- Yes
Aquatic Biotope
- Date of collecting
- Collecting area
- Water depth
- Air temperature
- Sunlight
- Partial shade
Environment
- Environment
- Affected by human activity
- Affected by human activity
- Pollution
- Pollution
- Moderate
- Surrounding area
The surrounding area of the Jelai-Bila River in Central Kalimantan, Indonesia, is characterized by dense tropical rainforests and peat swamps, rich in biodiversity. The region is home to various plant species, including ferns, orchids, and large trees, as well as wildlife such as orangutans and exotic birds.
The landscape is shaped by the tropical monsoon climate, with heavy rainfall contributing to lush vegetation. However, agricultural expansion, particularly palm oil plantations, has led to significant deforestation and habitat alteration in the area.
- Underwater landscape
The river’s environment is defined by its tropical monsoon climate, with high levels of rainfall and warm temperatures throughout the year. This climate supports a lush, dense vegetation cover along the riverbanks, which is home to numerous endemic species. Aquatic plants such as Cryptocoryne and Rotala thrive in the soft, acidic waters of the Jelai-Bila River, providing essential habitats for fish and other aquatic organisms. The river is also home to various fish species, including the tiny, brightly colored Chili Rasbora (Boraras brigittae) and Phoenix Rasbora (Boraras merah), which are native to this region.
The Jelai-Bila River is not only important for its ecological value but also for the local communities that live along its banks. The river provides fresh water, fish, and fertile land for agriculture, making it a crucial resource for the people who depend on it. The indigenous communities have a deep cultural connection to the river, viewing it as both a provider and a guardian of life. Their traditional practices and beliefs are closely linked to the river and the surrounding environment.
Fishlist:
- Boraras merah (Cyprinidae)
- Boraras brigittae (Cyprinidae)
Aquatic plants:
- Rotala rotundifolia (Lythraceae)
Wetland plants:
- Nephrolepis exaltata (Polypodiaceae)
- Threats to ecology
The Jelai-Bila River faces several environmental challenges, primarily due to human activities such as deforestation, agriculture, and the expansion of palm oil plantations. These activities have led to habitat loss, soil erosion, and water pollution, threatening the river’s delicate ecosystem.
The clearing of forests for agriculture and plantations not only destroys habitats but also alters the water flow and quality, affecting the river’s biodiversity. Additionally, climate change poses a significant threat, with altered rainfall patterns and rising temperatures potentially leading to more frequent flooding or droughts.
Conservation efforts are underway to protect the Jelai-Bila River and its surrounding environments. These efforts involve local communities, conservation organizations, and government bodies working together to promote sustainable practices, restore degraded habitats, and raise awareness about the importance of preserving this unique natural heritage.
Protecting the Jelai-Bila River is crucial not only for maintaining the rich biodiversity of the region but also for ensuring the continued survival of the indigenous cultures and communities that rely on the river.
Riparian zone
- Trees near the aquatic habitat
-
Many - Nephrolepis exaltata (Polypodiaceae)
