Theses and Dissertations

Issuing Body

Mississippi State University


Walker, Jason B.

Committee Member

Shauwecker, Timothy J.

Committee Member

Gallo, Warren C.

Date of Degree


Document Type

Graduate Thesis - Open Access


Landscape Architecture

Degree Name

Master of Landscape Architecture (M.L.A.)


College of Agriculture and Life Sciences


Department of Landscape Architecture


Green roofs are increasingly being used in the United States to mitigate the negative effects of impervious surfaces on aquatic ecosystems. Though performance of these systems varies with climate, little research has been conducted in the Southeastern U.S., and no prior research has been conducted in Mississippi. An experiment was conducted to determine the effect of soil depth and roof slope on the stormwater retention of green roofs in Mississippi’s hot, humid climate. Simulated roof platforms were constructed to investigate two soil depths and two slopes, each replicated three times and planted with four species of Sedum. The green roof platforms significantly reduced runoff depth when compared with total rainfall depth. Soil depth and slope both significantly affected retention, with higher retention seen with increasing soil depth and lower retention seen with increasing slope. These results indicate that green roofs can be an effective tool to reduce runoff in Mississippi.