Relationships between Rainy Days, Mean Daily Intensity, and Seasonal Rainfall over the Koyna Catchment during 1961–2005

Table 3

Statistical parameters of rainfall series of eight stations in the Koyna catchment.

		Jun	Jul	Aug	Sept	Oct	Jun–Sept	Jun–Oct
Pratapgad	𝑛	21.45	29.74	29.58	22.84	8.37	103.61	111.97
	𝑟	42.16	71.86	58.5	24.83	18.8	51.53	49.09
	𝑠	50.87	70.8	58.89	30.51	26.4	58.95	57.81
	CV	120.65	98.52	100.65	122.84	140.47	114.4	117.76
Mahabaleshwar	𝑛	23.47	30.6	29.49	23.04	9.87	106.6	116.47
	𝑟	38.74	71.17	58.17	22.98	13.32	50.02	46.91
	𝑠	53.29	70.28	57.29	30.56	23.20	59.03	57.78
	CV	137.58	98.76	98.49	132.94	174.10	118.01	123.18
Valvan	𝑛	22.26	30.44	30.24	21.00	7.00	103.94	110.94
	𝑟	53.49	82.99	66.46	25.43	16.40	60.23	57.46
	𝑠	60.33	79.13	66.45	31.95	23.26	67.22	66.19
	CV	112.80	95.35	99.99	125.64	141.81	111.60	115.18
Bamnoli	𝑛	18.45	29.16	28.47	18.74	7.16	94.82	101.97
	𝑟	28.45	40.91	29.19	13.85	14.04	29.62	28.52
	𝑠	36.77	43.92	36.50	17.99	18.17	37.52	36.71
	CV	129.24	107.36	125.04	129.89	129.39	126.68	128.71
Kargaon	𝑛	21.00	30.17	28.75	19.83	9.33	99.75	109.08
	𝑟	38.20	49.81	36.89	17.67	14.57	37.25	35.31
	𝑠	48.19	53.29	42.47	31.29	24.57	46.71	45.68
	CV	126.16	106.97	115.13	177.11	168.67	125.38	129.36
Sonat	𝑛	19.51	29.17	28.63	17.6	6.31	94.91	101.23
	𝑟	34.06	55.80	38.21	14.57	13.58	38.38	36.83
	𝑠	44.20	59.70	44.09	20.19	19.52	48.58	47.67
	CV	129.78	107.00	115.40	138.60	143.80	126.58	129.42
Navaja	𝑛	20.94	30.15	29.88	20.91	7.56	101.88	109.44
	𝑟	46.71	74.51	62.16	25.93	17.89	55.20	52.62
	𝑠	56.23	72.24	58.15	32.87	25.02	60.99	59.96
	CV	120.36	96.96	93.55	126.80	139.91	110.49	113.95
Koyna	𝑛	21.96	29.89	29.67	20.78	8.33	102.29	110.62
	𝑟	39.93	67.97	48.15	18.91	14.19	46.24	43.82
	𝑠	48.01	66.19	48.50	24.55	22.74	53.64	52.64
	CV	120.22	97.39	100.72	129.82	160.19	116.01	120.12

𝑛: the mean number of rain days, 𝑟: the mean rain amount per rain day (mm), 𝑠: standard deviation (σ), and CV: 100 * (s.d./r).