人们修整土地、扩张城市及修建水坝等活动，使我们生活的那些流域发生了很大的变化，同时也会改变洪水对自然环境的影响。
We make a lot of changes to our catchments including land clearing, urban development, DAMS, and so on that can change the impact of a flood on the natural environment.
自然因素和社会因素共同促成了疏勒河流域水文环境的变化，但两者贡献度的大小还需要进一步的研究。
It should be said that natural factors and social factors contribute to hydrological environment changes of the Shule River Basin, but both the size of the contribution is needed further research.
通过分析海河流域地下水开采与环境变化的关系，揭示了由于海河流域地下水过量开采而引发的生态环境问题。
By analyzing the relation between the underground water and environment, this paper raises the over exploitation cause the ecological and environment problem in the Haihe River Valley.
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