水系

水系	shuǐ xì	drainage system
水	Shuǐ	surname Shui
水	shuǐ	water / (after a name) ... River / to swim (used mostly in 会水 and 水性) / (coll.) lacking in substance; shoddy / (bound form) additional cost; extra income / classifier for washings of a garment
系	xì	to connect / to relate to / to tie up / to bind / to be (literary)
系	xì	system / department / faculty
系	jì	to tie / to fasten / to button up
系	xì	to connect / to arrest / to worry