NDLI: Future potential impacts of climate change on agricultural watershed hydrology and the adaptation strategy of paddy rice irrigation reservoir by release control

Content Provider	Springer Nature Link
Author	Park, Geun Ae Shin, Hyung Jin Lee, Mi Seon Hong, Woo Yong Kim, Seong Joon
Copyright Year	2009
Abstract	This study is to assess the climate change impact on the temporal variation of paddy rice irrigation reservoir water level from the future evaluated watershed inflow, and to suggest an adaptation method of the future reservoir water level management for stable water supply of paddy irrigation demands. A 366.5 km2 watershed including two irrigation reservoirs located in the upper middle part of South Korea was adopted. For the future evaluation, the SLURP model was set up using 9 years daily reservoir water level and streamflow records at the watershed outlet. The average Nash-Sutcliffe model efficiencies for calibration and validation were 0.69 and 0.65, respectively. For the future climate condition, the NIES MIROC3.2 hires data by SRES A1B and B1 scenarios of the IPCC was adopted. The future data were downscaled by applying Change Factor statistical method through bias-correction using 30 years past weather data. The results of future impact showed that the future reservoir storages of autumn and winter season after completion of irrigation period decreased for 2080s A1B scenario. Considering the future decrease of summer and autumn reservoir inflows, the reservoir operation has to be more conservative for preparing the water supply of paddy irrigation, and there should be a more prudent decision making for the reservoir release by storm events. Therefore, as the future adaptation strategy, the control of reservoir release by decreasing in August and September could secure the reservoir water level in autumn and winter season by reaching the water level to almost 100% like the present reservoir water level management.
Starting Page	271
Ending Page	282
Page Count	12
File Format	PDF
ISSN	16112490
Journal	Paddy and Water Environment
Volume Number	7
Issue Number	4
e-ISSN	16112504
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-09-10
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Climate change Agricultural reservoir MIROC 3.2 SLURP Change Factor method Reservoir storage Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution Soil Science & Conservation Ecotoxicology Agriculture Geoecology/Natural Processes Hydrogeology
Content Type	Text
Resource Type	Article
Subject	Environmental Engineering Water Science and Technology Agronomy and Crop Science

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