thalweg

1.The confined aquifer cut by the river thalweg keeps closely hydraulic relationship with the river.

二维模拟结果表：被河泓切割的压含水层动态与江水位关系密切；

2.The thalweg in loess hill area is an important terrain structural line, reflecting topography and landform character.

黄土丘陵区的沟沿线,是反映该区地形地貌特征的重要的地形结构线。