Identification of the El Niño Effect on Lake Toba's Water Level Variation

Hendri Irwandi, M. Syamsu Rosid, Terry Mart

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


Lake Toba is located in the province of North Sumatra, Indonesia which is the largest lake in southeast Asia and is the largest volcanic-Type lake in the world. The lake's countenance level is decreased and this can have a negative impact on utilization of power plants and agricultural irrigation. This study will see whether the water level is decreased due to the influence of El Niño activity. The methods used are statistical and descriptive analysis. The data used is the water level of Lake Toba in period of 1957-2016, precipitation data uses NOAA Climate Prediction Center (CPC) data with a resolution of 0.50° × 0.50° from January 1957 to December 2013 (56 years) to analyze rainfall anomalies. El Niño's activities have an effect on Lake Toba water level, where the moderate El Niño > 12 months duration resulted in a reduction of 1.5-2 m, while the strong El Niño with a duration of > 10 months resulted in a decline of 2-2.5 m.

Original languageEnglish
Article number012022
JournalIOP Conference Series: Earth and Environmental Science
Issue number1
Publication statusPublished - 30 Dec 2019
Event2nd International Conference on Life and Applied Sciences for Sustainable Rural Development, ICLAS-SURE 2019 - Purwokerto, Indonesia
Duration: 20 Nov 201922 Nov 2019


  • CPC
  • El Niño
  • Lake Toba
  • Water Level


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