\[ \newcommand\si[1]{\mathrm{#1}} \newcommand\SI[2]{#1\,\si{#2}} \newcommand\matr[1]{\mathbf{#1}} \DeclareMathOperator*{\argmax}{arg\,max} \DeclareMathOperator*{\argmin}{arg\,min} \]
Hydrologic cycle and development
1 Watershed
2 Development vs. water cycle
3 Low impact development (LID)
Green roof
Pervious parking lot
Treatment at the end of each stormwater pipe
3.1 Effects of low impact development
Improved water quality: LID reduces stormwater pollution and improved water quality increases property values and lowers clean-up costs.
Less costly floods: LID reduces the volume and speed of stormwater runoff and lessens the severity of flood events.
Restored aquatic habitat: LID reduces the amount of stormwater reaching natural streams.
Improved groundwater recharge: LID helps retain more rainfall on-site.
Enhanced neighborhood beauty: LID makes communities more beautiful, sustainable, and wildlife-friendly.
4 The rational method
See the rational method.