Changes

;Porosity

;Porosity

;porosity

;porosity

:The porosity (n) of a mixture is the ratio of the volume of void-space to the total or bulk volume of the mixture. It is closely related to the concept of void ratio (e) where void ratio is the ratio of the volume of void-space to the volume of solids.

:The porosity (n) of a mixture is the ratio of the volume of void-space to the total or bulk volume of the mixture. It is closely related to the concept of void ratio (e) where void ratio is the ratio of the volume of void-space to the volume of solids. n = Volume of voids/Total volume of mixture = e/(1+e)  

n = Volume of voids/Total volume of mixture = e/(1+e)  

;Precipitation  

;Precipitation  

;Runoff

;Runoff

;runoff  

;runoff  

:That potion of the water precipitated onto a catchment area, which flows as surface discharge from the catchment area past a specified point.  

:The portion of water precipitated onto a catchment area, which then flows as surface discharge from the catchment area past a specified point.

;Sand  

;Sand  

;Void space ratio

;Void space ratio

;void space ratio

;void space ratio

:The void ratio (e) of a mixture is the ratio of the volume of void-space to the volume of solids. It is closely related to the concept of porosity (n) where porosity is the ratio of the volume of void-space to the total or bulk volume of the mixture.  

:The void ratio (e) of a mixture is the ratio of the volume of void-space to the volume of solids. It is closely related to the concept of porosity (n) where porosity is the ratio of the volume of void-space to the total or bulk volume of the mixture. e = Volume of voids/Volume of solids = n/(1-n)  

e = Volume of voids/Volume of solids = n/(1-n)  

;Watercourse  

;Watercourse