Journal of Water Resources Resear ch水资源研究OPEN ACCESS
2014. 3( 1)
70
(a) (b)
(c) (d)
Figure 2. Frequency curve of annual average flow at four Dongjiang trunk stream stations; (a)Theoretical frequency curves of annual aver-
age flow bef o r e an d a ft er chan g e-point at Longchuan statio n; (b) Theoretic al fr eq uenc y curv es o f annu a l av era g e flo w be f ore an d after
change-point at Heyuan station; (c)Theor etical frequency curves of annual average flow before and after change-point at Lingxia station; (d)
The oretic al fre q u en cy cu rv e s o f an nual av era ge flow at Boluo station