It proofs that benefits of waterlog control in Liaohe River Basin starts to rise obviously in the 1990s and has remarkable benefits of waterlog control.

• 分析结果表明，后一个时段多年平均治涝效益明显高于前一个时段的，说明辽河流域治涝效益自20世纪90年代后呈上升趋势，效益显著。