\[ \newcommand\si[1]{\mathrm{#1}} \newcommand\SI[2]{#1\,\si{#2}} \newcommand\matr[1]{\mathbf{#1}} \DeclareMathOperator*{\argmax}{arg\,max} \DeclareMathOperator*{\argmin}{arg\,min} \]

Hydrologic cycle and development

Dr. Huidae Cho
Institute for Environmental and Spatial Analysis...University of North Georgia

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.