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Table 1.

Comparison of groundwater resources amount of six northern basins between 1980–2000 and 2001–2012.

River basinsAnnual average amount for 1980–2000 (108 m3)Annual average amount for 2001–2012 (108 m3)Comparison
Songhua River 478 447 −6.50% 
Liaohe River 203 179 −11.80% 
Haihe River 235 221 −6.00% 
Yellow River 376 380 1.10% 
Huaihe River 397 418 5.30% 
Northwestern Rivers 770 889 15.50% 
Total 2,459 2,534 3.10% 
River basinsAnnual average amount for 1980–2000 (108 m3)Annual average amount for 2001–2012 (108 m3)Comparison
Songhua River 478 447 −6.50% 
Liaohe River 203 179 −11.80% 
Haihe River 235 221 −6.00% 
Yellow River 376 380 1.10% 
Huaihe River 397 418 5.30% 
Northwestern Rivers 770 889 15.50% 
Total 2,459 2,534 3.10% 
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