The optimization operation is calculated taking Lishui river basin parallel connection system as the example compares it and the conventional operation scheme results.
以澧水流域并联系统为例进行了优化调度计算，并以常规调度方案成果进行了分析比较论证。
The main material source comes from the north, and there are 4-5 former material sources nearly parallel to each other in the northern part of the basin.
北部物源供给明显，占主导地位。盆地北部4 - 5个古物源呈几乎平行的状态由北向南分布。
Sichuan Basin may be divided into east Sichuan parallel ridge-and-valley area, low mountain-hill area around the basin, central Sichuan hill area and west Sichuan plain area.
四川盆地可分为川东平行岭谷区、盆周低山丘陵区、川中丘陵区、川西平原区。
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