Wahyu Gendam Prakoso, Kukuh Murtilaksono, Suria Darma Tarigan, M Yanuar Jarwadi Purwanto

Judul	:	Streamflow extreme value analysis using correlation of streamflow data with TRMM derivatives at Bone Watershed Gorontalo, Indonesia
Abstrak	:	Most recent studies that have attempted to use rainfall dataset for continuous modelling of rainfall-runoff have found that, without detailed local calibration against traditional rain-gauge measurements, the TRMM data is simply not accurate enough for that purpose. This is partly a result of the coarse spatial resolution of the dataset, with each grid cell being 0.25° x 0.25°, and partly to do with the inherent difficulty in remotely sensing rainfall intensity. For this study, however, it was decided to derive a more general rainfall parameter, the total amount of rainfall calculated to have fallen on each of the delineated catchments, processed as a mean annual total, (in m3), and to see how closely that was correlated with the streamflow data. Considering that most of the streamflow data available is from 2007 – 2010, TRMM V6 3B42 3 hourly data covering this four year period were used. Given the lack of long-term data both discharge and rainfall, at Bone Watershed, Gorontalo Province, Indonesia), the limitations of an Extreme Value Analysis using such a short data set must be stressed from the outset. Most data sets available comprise approximately 3 – 4 years of data, which are insufficient to provide reliable predictions of discharge events with large return periods. A satisfactory hidrological correlation could be achieved using catchments weighted time series of TRMM daily rainfall data after scaling, with streamflow data from Bone River (Alale and Tulabolo) to obtain a time series of simulated discharge. Realatively reliable extrema value estimation on the design flood parameter were produced with resasonable several limitation.
Tahun	:	2019	Media Publikasi	:	Seminar Internasional
Kategori	:	Prosiding	No/Vol/Tahun	:	1 / 284 / 2019
ISSN/ISBN	:	1755-1315
PTN/S	:	Universitas Pakuan	Program Studi	:	TEKNIK SIPIL
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