Developing drought stress index for monitoring Pinus densiflora diebacks in Korea

Table 6 Rank analysis for dieback events in the 10 target locations during 2004–2016 (Fig. 3)

DSI rank	DSI mean	Frequency by DSI model						Cumulative
DSI rank	DSI mean	M1	M2	M3	M4	M5	Mean	conformity (%)
1	1.1	2	2	6	6	5	4.2	30.0
2	0.8	2	2	0	1	3	1.6	41.4
3	0.7	2	5	2	1	1	2.2	57.1
4	0.5	0	1	0	0	0	0.2	58.6
5	0.3	0	0	1	1	0	0.4	61.4
6	0.2	0	1	0	2	1	0.8	67.1
7	0.1	3	2	3	1	3	2.4	84.3
8	− 0.1	2	1	1	1	1	1.2	92.9
9	− 0.2	1	0	1	1	0	0.6	97.1
10	− 0.3	2	0	0	0	0	0.4	100.0
11	− 0.8	-	-	-	-	-	-	100.0
12	− 1.0	-	-	-	-	-	-	100.0

For each rank, the mean Drought Stress Index (DSI) was calculated, frequency of dieback events were counted for different models, and then mean frequency was used to calculate cumulative conformity.

ISSN: 2288-1220