drainnssssssss

Helloo, i am here to tell y'all more about the drainage system next to bukit timah plaza! :) the pictures above was taken after it rained super heavily, and as you can see, quite alot of the precipitation had flowed into the drain. as you know from the previous posts, the drain above is part of a larger drainage basin system which helps convey water from all around the country to a common area, like a river or a reservoir for Singapore's case :D. the water you see here is probably going to be in your cup next time, after going through cleansing (:

yeah so anyway, heavy rain that day, leading to precipitation percolating into soil and being intercepted by the grass nearby. however, as we can infer from the rainwater in the drain, overland flow occurred, and many reasons can explain for this! for example, the infiltration capacity (the rate of which water soaks into the soil) could have been exceeded; the zone of saturation could have increased, causing the water table to move up and causing the zone of aeration to decrease in size, leading to the soil being too saturated for more intake of precipitation! :( therefore, overland flow into the drains! :D and yepp like what everyone had said, a drainage system is an 'open' system, so evapotranspiration is bound to occur :) we are lucky to have such a drainage system, or else everytime it rains in Singapore, there would be flooding which is baddddd.

okay hope you understood! gogo study for interims NEXT WEEK :( good luckkk 04 <3!

Yuxian! :D