Precipitation Nowcasting Based on Dual-Flow 3D Convolution and Monitoring Images

Suhui Yang; Zhiwei Lin; Shaojun Lai; Jinfu Liu

doi:10.3788/LOP57.201011

Laser & Optoelectronics Progress, Volume. 57, Issue 20, 201011(2020)

Precipitation Nowcasting Based on Dual-Flow 3D Convolution and Monitoring Images

Suhui Yang¹, Zhiwei Lin^1,3,4、*, Shaojun Lai², and Jinfu Liu^1,5,6、**

Author Affiliations

¹College of Computer and Information Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China

²Fuzhou Meteorological Bureau, Fuzhou, Fujian 350014, China

³College of Forestry, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China

⁴Forestry Post-Doctoral Station, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China

⁵Cross-Strait Nature Reserve Research Center, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China

⁶Key Laboratory of Fujian Universities for Ecology and Resource Statistics, Fuzhou, Fujian 350002, China

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Figures & Tables(10)

Fig. 1. Dual-flow 3D convolution neural network

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Fig. 2. Convolution operation

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Fig. 3. Max pooling operation

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Fig. 4. Fully connection operation

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Fig. 5. Prediction effect. (a)Proposed network; (b)ConvLSTM network; (c)C3D network; (d) Asy 3D network

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Fig. 6. Accuracy and loss value under training. (a) Accuracy; (b) loss value

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Fig. 7. Accuracy and loss value under test. (a) Accuracy; (b) loss value

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Fig. 8. Characteristic graphs under different depth convolution modules

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Table 1. Ablation experiment
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Table 1. Ablation experiment
Model A B C D E
Single- flow Single loss No pooling √
Dual-flow Single loss Max pooling √
No pooling √
Dual loss Max pooling √
average pooling √
A/% 82.19 81.00 84.23 84.20 84.46

Table 2. Comparison of test results of each precipitation intensity

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Table 2. Comparison of test results of each precipitation intensity

P_I/(mL·h^-1)	Proposed network					ConvLSTM						C3D					Asy 3D							Samplesize
P_I/(mL·h^-1)	P_FAR /%↓	P_POD /%↑		P_CSI /%↑		P_FAR /%↓		P_POD /%↑		P_CSI /%↑		P_FAR /%↓		P_POD /%↑		P_CSI /%↑	P_FAR /%↓		P_POD /%↑		P_CSI /%↑			Samplesize
0	0.11		0.96		0.92		0.24		0.89		0.82		0.12		0.95			0.91		0.18		0.86	0.84	1227
1	0.19		0.78		0.79		0.42		0.61		0.59		0.18		0.74			0.78		0.31		0.67	0.68	501
2	0.22		0.72		0.75		0.35		0.47		0.55		0.29		0.72			0.72		0.43		0.62	0.60	261
3	0.22		0.76		0.77		0.35		0.61		0.63		0.29		0.73			0.72		0.36		0.69	0.67	193
4	0.24		0.76		0.76		0.37		0.57		0.60		0.27		0.72			0.73		0.32		0.51	0.59	103
5	0.17		0.70		0.76		0.30		0.51		0.59		0.26		0.70			0.72		0.36		0.43	0.52	69
6	0.03		0.69		0.81		0.32		0.40		0.51		0.13		0.62			0.72		0.38		0.60	0.61	42
7	0.23		0.59		0.67		0.27		0.28		0.41		0.29		0.56			0.63		0.39		0.44	0.51	39
8	0.24		0.62		0.68		0.11		0.38		0.53		0.36		0.67			0.65		0.54		0.52	0.49	21
9	0.26		0.56		0.64		0.10		0.36		0.51		0.18		0.56			0.67		0.47		0.40	0.45	25
10	0.21		0.55		0.65		0.14		0.30		0.44		0.17		0.50			0.62		0.33		0.90	0.77	20
11	0.21		0.81		0.80		0.11		0.30		0.44		0.16		0.78			0.81		0.27		0.41	0.52	27
12	0.20		0.80		0.80		0.00		0.20		0.33		0.00		0.80			0.89		0.33		0.40	0.50	5
13	0.00		0.71		0.83		0.00		0.43		0.60		0.00		0.57			0.73		0.00		0.71	0.83	7
14	0.33		0.89		0.76		0.33		0.44		0.53		0.25		0.67			0.71		0.33		0.44	0.53	9
15	0.00		0.33		0.50		0.00		0.33		0.50		0.00		0.33			0.50		0.25		0.50	0.60	6
16	1.00		0.00		0.00		1.00		0.00		0.00		1.00		0.00			0.00		0.00		1.00	1.00	1
17	0.00		0.80		0.89		0.00		0.40		0.57		0.00		0.80			0.89		1.00		0.00	0.00	5
18	0.00		0.75		0.86		0.00		0.50		0.67		0.00		0.75			0.86		0.00		0.50	0.67	4
19	0.00		0.43		0.60		0.00		0.29		0.44		0.25		0.43			0.55		0.00		0.86	0.92	7
2	00.25		0.86		0.80		0.38		0.71		0.67		0.33		0.86			0.75		0.00		0.43	0.60	7
21	0.00		1.00		1.00		0.33		0.33		0.44		0.29		0.83			0.77		0.20		0.67	0.73	6
22	0.00		1.00		1.00		0.00		1.00		1.00		0.00		1.00			1.00		0.00		1.00	1.00	2
24	0.00		0.50		0.67		0.00		0.50		0.67		0.00		0.50			0.67		0.00		1.00	1.00	2
25	0.50		1.00		0.67		0.00		1.00		1.00		0.00		1.00			1.00		0.00		1.00	1.00	1
27	0.00		1.00		1.00		0.00		0.33		0.50		0.25		1.00			0.86		0.00		0.67	0.80	3
29	1.00		0.00		0.00		1.00		0.00		0.00		1.00		0.00			0.00		1.00		0.00	0.00	1
32	0.00		1.00		1.00		0.00		1.00		1.00		0.00		1.00			1.00		0.00		1.00	1.00	1
34	1.00		0.00		0.00		1.00		0.00		0.00		1.00		0.00			0.00		1.00		0.00	0.00	1
38	1.00		0.00		0.00		1.00		0.00		0.00		1.00		0.00			0.00		0.00		1.00	1.00	1
46	1.00		0.00		0.00		1.00		0.00		0.00		1.00		0.00			0.00		0.00		1.00	1.00	1
56	0.00		1.00		1.00		1.00		0.00		0.00		0.00		1.00			1.00		0.00		0.50	0.67	2

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Suhui Yang, Zhiwei Lin, Shaojun Lai, Jinfu Liu. Precipitation Nowcasting Based on Dual-Flow 3D Convolution and Monitoring Images[J]. Laser & Optoelectronics Progress, 2020, 57(20): 201011

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