Water-Saving Benefit Model Analysis of Plain Reservoirs in Arid Areas Based on Nonlinear Data Prediction under Floating Ball Cover

Table 1

Days and frequencies of different wind speeds.

Serial number	Wind speed m/s	Wind level	Days d	Frequency %
1	0–1.5	0–1	7	3.9
2	1.6–3.3	2	133	72
3	3.4–5.4	3	37	20.2
4	5.5–7.9	4	2	1.1
5	>8.0	>5	5	2.8
Total			185	100