5 / 60
Page 31
Notes:
conferenceseries
.com
Volume 8, Issue 10 (Suppl)
J Earth Sci Clim Change, an open access
ISSN: 2157-7617
Climate Change 2017
October 19-21, 2017
CLIMATE CHANGE
October 19-21, 2017 | Rome, Italy
4
th
World Conference on
Climate change impact on rice production in Musi river basin in Indonesia
Koki Homma
1
, Toshio Koike
2
, Kumiko Tsujimoto
3
and
Tetsu Ohta
3
1
Tohoku University, Japan
2
ICHARM, Japan
3
University of Tokyo, Japan
O
ne of the major agricultural productions in Indonesia is rice production, on which negative climate change impact is
anticipated. To assess the impact, simulating water budget and its effect on rice production is recommended. In this study,
we developed a coupling model of hydrology and rice growth, and simulated rice yield under some GCM scenarios. After
downscaling and bias-correcting GCMs, a hydrological model, the Water and Energy Budget-based Distributed Hydrological
Model (WEB-DHM), simulated water flow and soil moisture content in total 60,000 km2 of Musi river basin by 500 m-mesh.
Each mesh was categorized such as rainfed rice, shrub and so on based on governmental land use map. Rice growth and yield
was simulated by a model, Simulation Model for Rice Weather Relations for rainfed (SIMRIW-Rainfed) based on the weather
and soil moisture by WEB-DHM. Weather data from 1985 to 2012 was used for model calibration and validation as the
present climate. The simulated rice yield under present climate was well consistent with the statistical data for rice production.
Decrease in rice yield was simulated in rainfed paddy fields due to drought. Rice yield in the future (2050-2065) was slightly
increased under GCM scenario gfdl_cm2_0, but largely decreased under gfdl_cm2_1. Shift of rainy season is one of the reasons
of large decrease under gfdl_cm2_1, change of planting time and duration is one of adaptive strategies.
Biography
Koki Homma is an Agronomist and Crop Physiologist. He graduated from Kyoto University, Japan, supervised by Professor Horie who simulated rice production
under future climate conditions in Asia. One of his major activities is the investigation in farmers’ fields to evaluate production constraints and climate change
impacts in Southeast Asia.
koki.homma.d6@tohoku.ac.jpKoki Homma et al., J Earth Sci Clim Change 2017, 8:10(Suppl)
DOI: 10.4172/2157-7617-C1-036