headwater meaning in Chinese

河流的源流
河源段
河源头
上游水域

In arid climates, surface water is generally better than ground water in headwater areas, but poorer downstream .
在干旱气候的上游区，地表水一般较地下水好，但下游的地表较差。
It will lengthen as a result of headwater erosion and, thereby, will cut a valley through both hard and soft rock .
由于向源侵蚀的结果，它不断延长并且穿过软硬岩石从中切出一条河谷来。
Conclusion : water quality of the headwater is bad
结论：该市农村水源水水质差。
Study on runoff forecast of baihe river basin in headwater region of the yellow river
黄河源区白河流域径流预报研究
A study of the geological environmental of suprapermafrost water in the headwater area of the yellow river
黄河源区冻结层上水地质环境影响研究

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