control reach的用法和樣例：
例句
- Results show that the construction of the Fuling dock has a little influence on flood control and flow regime of the Fuling reach.
結果表明，修建涪陵港區碼頭對該河段的防洪及河勢變化影響不大。 - This method is applied to generate the digital topography of river reach from Huayuankou to Lijin in the Lower Yellow River.
以黃河下游花園口至利津河段為例詳述了黃河下遊河道數字地形生成的原理及實現。
