**3. Results**

#### *3.1. Hydraulic Performance*

The results obtained in the different types of simulated rainfall conditions are shown below.

#### 3.1.1. Retention Coefficient C

Figure 6 shows the response of the four green roof prototypes under typical rainfall conditions. The rainfall simulation followed the pre-defined five-days sequence of precipitation (4, 12, 50, 51, and 1 mm). On the other hand, Figure 7 summarizes the behavior of the green roof prototypes for the intense rainfall condition (simulating a precipitation rate of 49 mm/h).

**Figure 6.** Average behavior of the retention coefficient (C) for typical rain conditions between post-drought and stable cycles.

**Figure 7.** Average behavior of the retention coefficient for intense rain condition between post-drought and stable cycles.

#### 3.1.2. Drainage Capacity

Drainage capacity was measured for both typical and intense rainfall conditions. Figures 8 and 9 show the graphical results according to the predefined simulation parameters.

**Figure 8.** Average behavior of drained water (mL/min) for typical rain conditions between post-drought and stable cycles.

**Figure 9.** Average behavior of drained water (mL/min) for intense rain conditions between post-drought and stable cycles.

#### *3.2. Temperature*

Temperature data from the four moments of the day are summarized in Figure 10. From left to right: morning, noon, sunset, and early morning. In the first segment, a change between the environment and the sunrise effect was observed. In the second, a notable difference was observed due to the high-temperature condition that occurred in the city of Cali and the decreasing contribution of the roofs. In the third segment, again, a change was observed between the roofs and the environment due to the arrival of night. Finally, the condition of lower environment temperature in the night and early morning hours was observed.

**Figure 10.** Temperature behavior during the day for roof prototypes and the environment.
