Variation of Runoff and Precipitation in the Hekou-Longmen Region of the Yellow River Based on Elasticity Analysis

Table 1

Characteristics of precipitation and runoff in different decades in the Hekou-Longmen region, Huangfuchuan, and Yanhe.

Year	Hekou-Longmen region				Huangfuchuan				Yanhe
	Precipitation		Runoff		Precipitation		Runoff		Precipitation		Runoff
	Average (mm)	𝐶𝑣	Average (10^8 m^3)	𝐶𝑣	Average (mm)	𝐶𝑣	Average (10^8 m^3)	𝐶𝑣	Average (mm)	𝐶𝑣	Average (10^8 m^3)	𝐶𝑣
1950s	506.9	0.25	84.2	0.33	431.7	0.58	2.65	0.64	495.3	0.18	2.14	0.35
1960–1969	501.1	0.26	69.0	0.26	339.5	0.42	1.72	0.63	563.5	0.22	2.48	0.44
1970–1979	439.9	0.19	54.0	0.21	373.4	0.24	1.76	0.62	498.4	0.18	2.06	0.35
1980–1989	433.5	0.15	37.2	0.22	340.9	0.21	1.27	0.59	502.1	0.18	2.08	0.26
1990–1999	413.2	0.15	42.0	0.22	348.2	0.18	0.90	0.61	466.9	0.23	2.08	0.27
2000–2010	424.1	0.14	23.0	0.47	360.1	0.21	0.33	0.92	497.6	0.16	1.45	0.31
Average	446.7	0.20	46.8	0.47	364.3	0.32	1.34	0.84	504.1	0.19	2.03	0.37