bin

Downstream of Brantas River Delta, Indonesia

Indonesia, Kediri, East Java

This is a part of the corner of the Brantas River delta which I use as the concept of this biotope event, where the water volume is shallower but inhabited by various kinds of biota, from plant fish and others. I hope this time my concept will bring victory so that it can introduce the biotope of rivers in our country.

Submitted by: MAA Rafsanjani
Approved by: Hans-Georg Evers & John Lenagan

GPS: -7.6065879, 112.1048508

Geographical region: Southeastern Asia
Drainage Basin: Brantas basin
River catchment: Brantas River Delta
Water body type: River
Water body name: Brantas
Water body part: Delta
Water body course: Lower course
Water body: tributary of: River
Tributary name: Bramata river delta

Videos above and below water

Water Chemistry

Water information

Water type: Fresh water
Water color: Mixed water
Water transparency: Medium
Concentration of sediments: Medium
Water temperature: 28 °C
Water flow/curent: None

Chemical parameters

pH: 6.4
Conductivity
GH: 6 mg/l
KH
Dissolved Oxygen: 70 %

Substrate in nature

Sand: Black
Pebble/Gravel: Black
Stone: Black
Stone form: Roundish
Silt/Mud: Black
Leaves: Adundant
Driftwood: Few
Submerged terrestrial vegetation: Yes

Aquatic Biotope

Date of collecting: 17/04/2020
Collecting area: River bank
Water depth: 1,0m
Air temperature: 28 °C
Sunlight: Filtered/dappled sun

Environment

Environment

Untouched

Surrounding area

The river is the longest river in East Java, Indonesia. It has a length of 320 km, and drains an area over 11,000 km² from the southern slope of Mount Kawi-Kelud-Butak, Mount Wilis, and the northern slopes of Mount Liman-Limas, Mount Welirang, and Mount Anjasmoro. Its course is semi-circular or spiral in shape: at its source the river heads southeast, but gradually curves south, then southwest, then west, then north, and finally it flows generally eastward at the point where it branches off to become the Kalimas and Porong River. The river flows in the eastern area of Java with predominantly tropical monsoon climate (designated as Am in the Köppen-Geiger climate classification).

Underwater landscape

But this time I only raise the topic of biotope in the Brantas River delta, which is a shallower location and is inhabited by various types of small fish and plants.
rocks, sand, wood, plants.

Fishes:

Macrognathus aculeatus
Trichopsis vittata
Glyptothorax platypogon
Nemacheilus fasciatus
Palaemonetes sp.
Rhinogobius sp.
Pila ampullacea
Mastacembalus unicolor
Mystus sp.
Hemibagrus sp.
Channa striata
Trichopodus trichopterus
Anabas testudineus
Puntius binotatus
Rasbora argyrotaenia
Claris batracus
Osteachilus vittatus
Puntius sp.
Barbodes ballerides
Hampala macrolrpidota
Tor soro
Osphronemus gouramy
Pangasius micronemus
Hemibagrus nemurus
Tor tombroides

Threats to ecology

Residential development, fish poison, fish stun.

Riparian zone

Trees near the aquatic habitat: Few -

Bibliography

1996 - The Ecology of Java and Bali. Hong Kong: Periplus Editions Ltd. hlm. 132 by Whitten, T; Soeriaatmadja, R. E.; Suraya A. A.
2004 - "Brantas River Basin Case Study, Indonesia" by Ramu, Kikkeri
2007 - "Updated world map of the Köppen-Geiger climate classification". Hydrology and Earth System Sciences. 11: 1633–1644 by Peel, M C; Finlayson, B L; McMahon, T A

Sitography

→ News Unair
→ BKIPM

Comment by the expert

Hans-Georg Evers: Well done! Only water parameter and bibliography are not complete.

John Lenagan: The research was comprehensive, it was clear the participant had actually experienced this environment first hand and understood it components and how they formed and co-existed, this translation came through within the video with a subtley of approach and behavioural studies. It would have been helpful to have seen the overall setup and whole composition to better understand niche relationship and share knowledge of such a Biotope. The descrption of plants was not evident in the BIN supplied.