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During the measurement period, 25 rainfall events, divided into six classes (Table 2), were observed, and 246.2 mm of rainfall were recorded (Figure 2). The precipitation of individual events averaged 9.8 mm, and ranged from 0.1 to 34.8 mm. The precipitations events below 2 mm accounted for 32% of all events, and those below 10 mm accounted for 72% of events. Small precipitation events were frequent but produced a small percentage of the total precipitation amount, whereas large precipitation events were rare but were the main water supply source.
Table 2

Characteristics of rainfall partitioning of three shrub species during the experimental period in the study area

C. microphylla
H. fruticosum
S. gordejevii
Rainfall amount (mm)Frequency percentage (%)Rainfall percentage (%)Rainfall intensity (mm h–1)TF (%)SF (%)I (%)TF (%)SF (%)I (%)TF (%)SF (%)I (%)
<2 32 1.9 0.5 30.0 13.5 56.5 45.6 9.7 44.7 47.1 8.1 44.8 
2–5 12 4.5 1.3 48.9 13.1 38.0 59.6 8.9 31.5 69.9 7.0 23.1 
5–10 28 20.2 2.3 62.0 11.3 26.7 67.5 6.4 26.1 72.8 5.4 22.3 
10–15 4.5 1.2 67.3 10.4 22.3 80.6 4.3 15.1 74.1 4.7 21.2 
15–20 6.9 11.3 55.8 10.6 33.6 60.2 5.6 34.2 64.1 3.9 32.0 
>20 20 62.1 3.9 71.9 10.3 17.8 80.0 6.0 14.0 83.0 5.9 11.2 
C. microphylla
H. fruticosum
S. gordejevii
Rainfall amount (mm)Frequency percentage (%)Rainfall percentage (%)Rainfall intensity (mm h–1)TF (%)SF (%)I (%)TF (%)SF (%)I (%)TF (%)SF (%)I (%)
<2 32 1.9 0.5 30.0 13.5 56.5 45.6 9.7 44.7 47.1 8.1 44.8 
2–5 12 4.5 1.3 48.9 13.1 38.0 59.6 8.9 31.5 69.9 7.0 23.1 
5–10 28 20.2 2.3 62.0 11.3 26.7 67.5 6.4 26.1 72.8 5.4 22.3 
10–15 4.5 1.2 67.3 10.4 22.3 80.6 4.3 15.1 74.1 4.7 21.2 
15–20 6.9 11.3 55.8 10.6 33.6 60.2 5.6 34.2 64.1 3.9 32.0 
>20 20 62.1 3.9 71.9 10.3 17.8 80.0 6.0 14.0 83.0 5.9 11.2 

TF: Throughfall; SF: Stemflow; I: Interception.

Figure 2

Rainfall amount (mm), rainfall intensity (mm/h) and rainfall duration (h) during the experimental period in the study area.

Figure 2

Rainfall amount (mm), rainfall intensity (mm/h) and rainfall duration (h) during the experimental period in the study area.

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