“thalweg”的概念、定义、翻译、参考文献-科学参考

单词	thalweg
释义	thalweg [`täl´veg] ^GEOGRAPHY The middle of the principal navigable waterway which serves as a boundary between two states. ^GEOLOGY 1. A line connecting the lowest points along a stream bed or a valley. Also known as valley line. 2. A line crossing all contour lines on a land surface perpendicularly. ^HYDROLOGY Water seeping through the ground below the surface in the same direction as a surface stream course.
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