Open AccessIdentification of the El Niño Effect on Lake Toba’s Water Level Variation
Author(s) -
Hendri Irwandi,
Mohammad Syamsu Rosid,
T. Mart
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/406/1/012022
Subject(s) - precipitation , environmental science , hydrology (agriculture) , volcano , water level , irrigation , geography , physical geography , geology , meteorology , geochemistry , cartography , ecology , geotechnical engineering , biology
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.