檢視不透水层的原始碼

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|<center>'''不透水层'''<br><img
src=" https://ts1.cn.mm.bing.net/th/id/R-C.5063eac4db973346ce343ee8845e94d5?rik=7pYr8HOseJggUQ&riu=http%3a%2f%2fimg.civilcn.com%2fd%2ffile%2fzhishi%2fslsd%2f2020-03-18%2fe9a46bf2a0767367ab2c36d8d5724fed.png&ehk=aOxn6qEEYfvQCDwDEygLbh0rsNjvTVstJJ30pbLfF24%3d&risl=&pid=ImgRaw&r=0" width="280"></center><small>  圖片來自优酷</small> 
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'''隔水层'''

'''不透水层'''，亦称"隔水层"。透水性极低的岩层，一般将渗透系数小于0.001 m/d的岩层视为不透水层，如黏土、致密花岗岩，泥岩等，隔水是相对的，在相当大的的水力坡度下，不透水层也能透过和释放一定的水量。

*中文名:[[不透水层]]

*外文名:Impervious bed

*又    称:隔水层

*举    例：致密花岗岩、泥岩等

*解    释:渗透系数小于0.001 m/d的岩层

*分    类:黏性土、低透水性的岩石