Table 2.

The velocities and directions of fissure water in the study area (Unit: μm/s).

Well	Type	Sum	Min	Max	Median	M. V	SD	C. V
Well ZK106, Hills in northern Hubei	Vi	124,259	71.3	1499.3	354.8	423.63	242.23	0.57
	Vt	552	123.75	968.13	292.74	339.25	126.29	0.37
	Vc	552	255.44	336.93	274.8	292.19	28.41	0.1
	Va	2	229.33	267.21	248.27	248.27	–	–
Well ZK01, Jianghan plain	Vi	48,310	84.1	1498.2	453.1	504.31	217.47	0.43
	Vt	1542	55.34	1180.62	426.5	432.16	133.63	0.31
	Vc	1542	193.26	498.94	281.29	304.78	69.99	0.23
	Va	4	220.21	364.5	348.12	320.24	58.86	0.18
Well DR01, Jiuling Mountains	Vi	175,663	11.6	1596.8	584.7	635.17	224.95	0.35
	Vt	522	14.79	1023.5	334.55	340.26	162.56	0.48
	Vc	522	34.46	204	501.76	188.3	77.4	0.41
	Va	5	73.69	285.1	230.52	186.82	88.29	0.47
Well HT35, Leizhou Peninsula	Vi	213,567	69.8	1200	416.7	415.42	163.53	0.39
	Vt	1842	46.57	958.8	397.58	418.85	94.23	0.23
	Vc	1698	51.83	388.86	346.45	348.72	20.69	0.06
	Va	6	340.04	390.39	370.75	378.82	37.23	0.09
Well PH33, Leizhou Peninsula	Vi	30,835	49.1	1994.4	430.1	453.9	221.22	0.49
	Vt	722	30.24	1135.3	435.19	429.06	103.73	0.24
	Vc	718	303.37	498.67	423.24	412.92	76.25	0.18
	Va	3	307.35	497	434.49	412.95	78.91	0.19

V_i instantaneous flow velocity, V_t time average velocity, V_c cumulative flow velocity, Va actual flow velocity, Min. minimum, Max. maximum, M.V. Mean value, S.D. standard deviation, C.V. coefficient variation.