Lake Batur is a

volcanic crater lake A volcanic crater lake is a lake in a crater that was formed by explosive activity or a collapse during a volcanic eruption. Formation Lakes in calderas fill large craters formed by the collapse of a volcano during an eruption. Lakes in maars ...

Kintamani, Bali Kintamani is a district (kecamatan), and a village within that district, on the western edge of the larger caldera wall of the Mount Batur (''Gunung Batur'') caldera in Bali, Indonesia. It is on the same north–south road as Penelokan and has b ...

, Bangli Regency of Bali, located about northeast of

Ubud Ubud is a town on the Indonesian island of Bali in Ubud District, located amongst rice paddies and steep ravines in the central foothills of the Gianyar regency. Promoted as an arts and culture centre, it has developed a large tourism indust ...

in Bali. The lake is inside of the caldera of an active volcano,

Mount Batur Mount Batur ''(Gunung Batur)'' is an active volcano located at the center of two concentric calderas north west of Mount Agung on the island of Bali, Indonesia. The south east side of the larger 10×13 km caldera contains a caldera lake. Bo ...

, located along the

Ring of Fire The Ring of Fire (also known as the Pacific Ring of Fire, the Rim of Fire, the Girdle of Fire or the Circum-Pacific belt) is a region around much of the rim of the Pacific Ocean where many volcanic eruptions and earthquakes occur. The Ring o ...

of volcanic activity.

Geography

Lake Batur lies south-east of the active

volcano, inside the older Batur caldera.

Bathymetry

The deepest point in the lake is around 88 meters.

Watershed

Inflow from agriculture

The Batur caldera is an important agricultural area, with cultivation of a wide range of produce. The irrigation water flows back into the lake after it has been pumped up, bringing with it nutrients to the lake body.

Inflow from hot springs

In the village of Toya Bungkah, there are several hot springs related to the volcanic activity of the

volcano. These have been developed for tourism purposes. The water from these hot springs flows into the lake.

Aquaculture

The Batur lake has been in recent years, farmed for fish. The Nile tilapia was the dominant species in the lake when a study was undertaken in 2011. The local name for the fish is Ikan Mujair.

Fish death

On the morning of 19 June 2011, greenish-white spots emerged on the surface of the lake. These spots later merged, stretching from Toya Bungkah to Buahan. In conjunction with the colour changes, thousands of dead fish floated to the surface. The cause of the fish death was believed to be related to the high diurnal-temperature difference during the onset of the dry season. As a result of the temperature difference, mixing of the water happened due to currents developed, which in turn mixed up the decomposing sediments, bringing toxic gases to the surface. By late 21 June 2011, the water colour was back to normal.

References

{{reflist Landforms of Bali Lakes of Indonesia, Batur Bangli Regency