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Table 2.

Basic statistics of the analysis subject (N = 680).

VariableDescriptionMeanStandard deviationMinMax
Unit cost Deflated project costs per volume of water to be newly developed per basin area (JPY/m3/s/km2104,323,713,200 1,281,278,176,924 38,884 31,159,272,463,977 
Available capacity Available reservoir capacity (m313,987,413 38,047,445 14,000 458,000,000 
Basin area Basin area (km2121.4 493.7 0.1 8,588 
Developed water Volume of water to be newly developed (m3/s) 3.99 9.7 0.0005 147.7 
Gross capacity Gross reservoir capacity (m317,610,297 49,695,906 22,000 601,000,000 
Project cost Deflated project costs (FY2005 = 100, JPY) 19,590,975,923 33,224,275,327 1,176,238 235,976,990,612 
Surface area Surface area (ha) 74.8 137.2 1.0 1,150 
Year Completion fiscal year 1981.8 16.5 1951 2015 
VariableDescriptionMeanStandard deviationMinMax
Unit cost Deflated project costs per volume of water to be newly developed per basin area (JPY/m3/s/km2104,323,713,200 1,281,278,176,924 38,884 31,159,272,463,977 
Available capacity Available reservoir capacity (m313,987,413 38,047,445 14,000 458,000,000 
Basin area Basin area (km2121.4 493.7 0.1 8,588 
Developed water Volume of water to be newly developed (m3/s) 3.99 9.7 0.0005 147.7 
Gross capacity Gross reservoir capacity (m317,610,297 49,695,906 22,000 601,000,000 
Project cost Deflated project costs (FY2005 = 100, JPY) 19,590,975,923 33,224,275,327 1,176,238 235,976,990,612 
Surface area Surface area (ha) 74.8 137.2 1.0 1,150 
Year Completion fiscal year 1981.8 16.5 1951 2015 
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