Calculation of the Instream Ecological Flow of the Wei River Based on Hydrological Variation

Table 2

The frequency of monthly flow satisfying the maximum instream ecological flow in the Wei River.

Month	Beidao station		Xianyang station		Huaxian station
	BFV (%)	AFV (%)	BFV (%)	AFV (%)	BFV (%)	AFV (%)
January	46	0	28	0	40	5
February	52	0	33	7	44	9
March	51	0	58	14	41	14
April	35	0	64	14	55	27
May	46	0	73	28	51	27
June	35	7	48	7	41	14
July	41	7	70	28	40	14
August	35	4	42	14	35	9
September	38	4	36	7	48	18
October	46	11	27	14	45	32
November	33	4	24	7	56	27
December	38	0	27	0	40	14

Note: BFV denotes before flow variation and AFV denotes after flow variation.