## 2 Methods
### Study Sites Selection  
Morgan State University (MSU) is situated in the Baltimore City, Maryland, USA. As shown in Table 1, there are several types of GSIs, also known as best management practices (BMPs), including bioretention, green roofs, rain gardens, permeable pavements, and ponds (there were more than 41 GSIs, and 20 of these are summarized). This study used selected specific components of GSIs, such as trees, grass, soil, and unhealthy trees, along with the entire area of the GSIs. For instance, bioretention (the Center for Build Environment & Infrastructure Studies (CBEIS)); green roofs (one at the Earl S. Richardson Library (ESRL) and another at the Graves School of Business and Management (GSBM)), as well as both micro-bioretention and a green roof (Calvin and Tina Tyler Hall (CTTH)) within the MSU Campus were selected for analysis. NAD83 coordinates (north and east points, units: meters, SPC zone: MD-1900) were converted into latitude and longitude (decimal degrees (DD) in Google Map) using the National Geodetic Survey (NGS) coordinate conversion and transformation tool (NCAT). The number ID of GSIs within the MSU are also labeled on top of the downloaded university map and are included in Supplementary Materials.  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**No.**} & \multirow{2}{*}{**Name**} & \multirow{2}{*}{**GSI Type**} & \multirow{2}{*}{**MD\_North 1**} & \multirow{2}{*}{**MD\_East 1**} & \multirow{2}{*}{**Year**} & \multirow{2}{*}{**Coordinates (Latitude, Longitude)**} & \multirow{2}{*}{**Collection Date (2021)**} \\ \cline{6-8}  & & & & & & & \\ \hline
1 & CBEIS \#1 & Bioretention & 187,162 20900 & 436,344,28000 & 2012 & 39.351953, \(-\)76.578343 & - \\
2 & CBEIS \#2 & Bioretention & 187,113.57600 & 436,268.57600 & 2012 & 39.351518, \(-\)76.579224 & 27 May/28 June \\
3 & CBEIS \#3 & Bioretention & 187,230.99400 & 436,342.13500 & 2012 & 39.352573, \(-\)76.578364 & - \\
4 & CBEIS & Green roof & 187,076.04700 & 436,213.66600 & 2012 & 39.351183, \(-\)76.579863 & 3 September \\
5 & CBEIS & Permeable pavement & 187,282.81000 & 436,344.30700 & 2012 & 39.352517, \(-\)76.578458 & - \\
6 & CBEIS & Oil/ grit separation & 187,178.68400 & 436,284.47300 & 2012 & 39.352104, \(-\)76.579036 & - \\
7 & GSBM & Bioretention & 185,898.43700 & 435,461.47700 & 2015 & 39.340606, \(-\)76.588651 & - \\
8 & GSBM & Green roof & 185,956.83500 & 435,517.33600 & 2015 & 39.341130, \(-\)76.588000 & 3 September \\
9 & BSSC \#2 \#1 & Micro-bioretention & 186,040.89000 & 435,446.26600 & 2017 & 39.341890, \(-\)76.588820 & - \\
10 & BSSC \#2 & Micro-bioretention & 186,028.51900 & 435,410.97700 & 2017 & 39.341780, \(-\)76.58820 & - \\
11 & BSSC \#3 & Micro-bioretention & 186,024.34600 & 435,470.47900 & 2017 & 39.341740, \(-\)76.588540 & - \\
12 & BSSC & Green roof & 186,009.97200 & 435,483.47500 & 2017 & 39.341610, \(-\)76.588390 & - \\
13 & LB 3 & Micro-bioretention & 186,020.65200 & 435,617.57800 & 2017 & 39.341701, \(-\)76.58634 & - \\
14 & ESRL & Green roof & 186,325.25200 & 435,724.28700 & 2007 & 39.344440, \(-\)76.585580 & 3 September \\
15 & CTTH & Micro-bioretention & N/A & N/A & 2020 & N/A & 29 May \\
16 & CTTH & Rain garden & N/A & N/A & 2020 & N/A & - \\ \hline \hline \end{tabular}
\end{table}
Table 1: Summary of GSIs at Morgan State University.