Anomali Hujan Bengawan Solo Hilir 1979 – 2017 Serta Keterkaitannya Dengan El-Nino dan La-Nina

Rainfall anomaly associated with severe drought or flood. Lower Bengawan Solo River are vulnerable to this kind of hydrometeorological disaster, especially Bojonegoro Regency. The research objective is to identify rainfall anomaly for 1979 – 2017 over Lower Bengawan Solo River and its characteristic when El Nino or La Nina occurring. Monthly rainfall data of 16 stasions used to analyze rainfall anomaly related to El Nino and La Nina; while SSTA Nino 3.4 HadISST used to identify El Nino and La Nina (ENSO) event.. Southern part of Bojonegoro Regency are the most vulnerable to rainfall deficit, especially Tretes and Sugihan. Strong El Nino or La Nina have returrn period for 10 to 15 years At specific years, it is found that wet anomaly acccount for 50% station (1989, 1995, 1998, and 1999). These years co-occurence with strong La Nina. Dry anomaly found at 1991, 1997, and 2002 which co-occurence with strong or moderate El Nino.

Abstract licence: CC BY

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