Water table
The shape of a water table beneath hilly topography
描画岩石浸透性能的参数是浸透 系数〔K〕。
1856年,法国水利学家达西 〔H.Darcy〕经过大量的实验,得 出线性浸透定律,
即达西定律:Q=Kωh/L=KωI
K-浸透系数;ω-过水断面;I-水力梯 度
Resources
groundwater: 地下水 infiltrate:渗入 porosity:孔隙度 pore:孔隙 fissure(fracture):裂隙 cavity:溶穴
permeability〔浸透性) aquifer〔含水层〕 aquitard〔弱透水层、半隔水层〕 aquiclude〔隔水层〕 unconfined aquifer〔无压含水层〕 confined aquifer〔承压含水层〕
1〕大气降水的补给 2〕地表水的补给 3〕凝结水的补给 4〕含水层之间的补给
〔2〕地下水的排泄 1〕泉 :是地下水的天然露头。 2〕其它排泄方式 ①泄流 ②蒸发 ③蒸腾 ④人工排泄(井〕
abh:侵蚀泉
c:接触泉
defg:溢流泉
i:断层泉
The types of springs
Spring form
•A permeable material〔透水物质〕 is one through which water flows easily,whereas an impermeable
Number of available conduits Size of the conduits Straightness of the conduits
An aquifer is a high-porosity, high-permeability rock.If it has access to the ground surface,it’s an unconfined aquifer.If it’s trapped below an aquitard,a rock with low permeability,it’s a confined