Reni Sulistyowati, Ratih Indri Hapsari, Fadli Syamsudin, Shuichi Mori, Satoru T. Oishi, Manabu D. Yamanaka
A 1-month-long observation of the Ciliwung River, which flows through Jakarta in Indonesia, has revealed evidence of the persistent existence of a diurnal cycle in the water level of a tropical river. This was consistent with the diurnal cycle in rainfall observed by meteorological radar and five rain-gauge stations. The river's diurnal cycle was distinguishable from the effects of oceanic and atmospheric tides and has a locally time-locked 1-day periodicity and an amplitude of 0.05 m. The day-to-day variation in the amplitude of the river's diurnal cycle was smaller than the diurnal cycle of the rainfall. © 2014, the Meteorological Society of Japan.
Kobe University, Japan; Agency for the Assessment and Application of Technology (BPPT), Indonesia; State Polytechnic of Malang, Indonesia; Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Japan