Table 2 The ratio of effective source (RE) and the pollen dispersal distance at a given probability of 50–99% (DP_50–99%) for different cases.

Source area	Wind speed	RE (%)	DP (m)
Source area	Wind speed	RE (%)	50%	75%	90%	95%	99%
10 × 10 m²	0.5 u	51.3	7	29	91	157	320
	1.0 u	53.4	10	43	148	270	577
	1.5 u	53.7	11	52	192	361	800
20 × 20 m²	0.5 u	39.0	10	40	112	184	352
	1.0 u	41.8	14	60	186	320	635
	1.5 u	42.6	16	73	242	430	881
50 × 50 m²	0.5 u	25.2	16	58	146	225	399
	1.0 u	28.6	24	91	246	394	725
	1.5 u	29.6	28	114	326	535	999
100 × 100 m²	0.5 u	17.1	22	73	170	253	433
	1.0 u	20.4	33	120	298	451	791
	1.5 u	21.6	41	155	401	621	1093
200 × 200 m²	0.5 u	10.9	27	86	190	274	457
	1.0 u	13.9	45	151	345	503	843
	1.5 u	15.2	57	199	473	697	1172
300 × 300 m²	0.5 u	8.0	30	92	197	282	465
	1.0 u	10.7	52	166	366	527	865
	1.5 u	12.0	68	225	508	734	1204

Note: Effective source represents the pollen grains dispersed and deposited outside of the source area, and ineffective source is the opposite of effective source, and it represents the pollen grains deposited within the source area. RE represents the ratio of effective source. DP_50–99% represents the pollen dispersal distance at a given probability of 50–99%, in other words, 50%-90% pollen grains in the effective source would be deposited within the range from the edge of pollen source to the distance of DP_50–99%.

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