TY - GEN
T1 - Estimating blue, green and grey water of paddy rice in Korea
AU - Yoo, Seung Hwan
AU - Choi, Jin Yong
AU - Lee, Sang Hyun
AU - Kim, Taegon
PY - 2011
Y1 - 2011
N2 - The degree of grain self-sufficiency is currently about 27% in South Korea which is why Korea is one of the largest net virtual water import countries. Agricultural water resources have been heavily developed from early 1970 for rice self sufficiency and agricultural water use is 48% to the total fresh water resources in Korea. Tracing the water footprint is quite important to set up the national water resources policy because agriculture for crop cultivation consumes a large amount of water. Thus, when considering the low food self-sufficiency and high portion of water use in agriculture, estimation of virtual water for paddy rice in Korea is required to analyze the national water balance. The aim of this study is to estimate the green, blue and grey water footprint of rice, using a higher spatial resolution than earlier studies and applying local data on actual irrigation. Green and blue water from rice fields is calculated using the water balance model in paddy field. The grey water footprint is estimated by referencing the several researches regarding discharge of T-N and T-P in paddy field. The total national water footprint for rice production was 9,275.9 m3/yr, and the direct and indirect water use accounted for 5,358.6 m3/yr and 3,917.3 m3/yr, respectively. Green, blue and grey water for rice production were estimated to be 1,865.4 m3/yr, 3,184.3 m3/yr, and 308.9 m 3/yr except for indirect water use including percolation and residual soil moisture. The total volume of water used for one ton of rice was 840.8 m3/ton, and the green, blue, and grey water accounted for 292.8 m3/ton, 499.5 m3/ton, and 45.5 m3/ton, respectively. The results of this study are expected to be used as basic data for national agricultural water footprint and to assist the national water resources policy.
AB - The degree of grain self-sufficiency is currently about 27% in South Korea which is why Korea is one of the largest net virtual water import countries. Agricultural water resources have been heavily developed from early 1970 for rice self sufficiency and agricultural water use is 48% to the total fresh water resources in Korea. Tracing the water footprint is quite important to set up the national water resources policy because agriculture for crop cultivation consumes a large amount of water. Thus, when considering the low food self-sufficiency and high portion of water use in agriculture, estimation of virtual water for paddy rice in Korea is required to analyze the national water balance. The aim of this study is to estimate the green, blue and grey water footprint of rice, using a higher spatial resolution than earlier studies and applying local data on actual irrigation. Green and blue water from rice fields is calculated using the water balance model in paddy field. The grey water footprint is estimated by referencing the several researches regarding discharge of T-N and T-P in paddy field. The total national water footprint for rice production was 9,275.9 m3/yr, and the direct and indirect water use accounted for 5,358.6 m3/yr and 3,917.3 m3/yr, respectively. Green, blue and grey water for rice production were estimated to be 1,865.4 m3/yr, 3,184.3 m3/yr, and 308.9 m 3/yr except for indirect water use including percolation and residual soil moisture. The total volume of water used for one ton of rice was 840.8 m3/ton, and the green, blue, and grey water accounted for 292.8 m3/ton, 499.5 m3/ton, and 45.5 m3/ton, respectively. The results of this study are expected to be used as basic data for national agricultural water footprint and to assist the national water resources policy.
KW - Blue water
KW - Green water
KW - Grey water
KW - Paddy rice
KW - Virtual water
KW - Water footprint
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M3 - Conference contribution
AN - SCOPUS:81255142551
SN - 9781618391568
T3 - American Society of Agricultural and Biological Engineers Annual International Meeting 2011, ASABE 2011
SP - 1675
EP - 1681
BT - American Society of Agricultural and Biological Engineers Annual International Meeting 2011, ASABE 2011
PB - American Society of Agricultural and Biological Engineers
T2 - American Society of Agricultural and Biological Engineers Annual International Meeting 2011
Y2 - 7 August 2011 through 10 August 2011
ER -