A Step towards Integrating CMORPH Precipitation Estimation with Rain Gauge Measurements

Table 1

Main characteristics of the rain gauge network in Brazil by region, state, their respective area (km²), total number of gauges (total #), total number of gauges after filtering missing data (# filtered), average distance (km) between gauges, and percentage of the rain gauges after filtering.

	Area (km^2)	Total #	# filtered	Distance (km)	% total #
North
Acre	163,648	20	6	165.2	30.0
Amapa	140,480	105	70	44.8	66.7
Amazonas	1,538,110	199	155	99.6	77.9
Pará	1,230,080	123	94	114.4	76.4
Rondônia	237,760	24	12	140.8	50.0
Roraima	221,056	54	38	76.3	70.4
Tocatins	276,416	181	96	53.7	53.0
	3,807,550	706	471	99.2	60.6
Northeast
Alagoas	27,768	76	36	27.8	47.4
Bahia	568,256	508	385	38.4	75.8
Ceará	146,688	1.002	694	14.5	69.3
Maranhão	327,680	290	147	47.2	50.7
Paraíba	56,512	56	28	44.9	50.0
Pernanbuco	97,664	122	66	38.5	54.1
Piauí	249,088	356	255	31.3	71.6
Rio Grande do Norte	52,608	34	22	48.9	64.7
Sergipe	22,016	38	24	30.3	63.2
	1,548,280	2.482	1.657	35.8	60.7
Central-West
Goiás	347,648	345	254	37.0	73.6
Mato Grosso	910,336	191	139	80.9	72.8
Mato Grosso do Sul	373,696	199	121	55.6	60.8
	1,631,680	735	514	57.8	69.1
Southeast
Espírito Santo	47,936	268	172	16.7	64.2
Minas Gerais	606,464	1.903	1.201	22.5	63.1
Rio de Janeiro	46,272	205	159	17.1	77.6
São Paulo	263,296	2.674	1.670	12.6	62.5
	963,968	5.050	3.202	17.2	66.8
South
Paraná	215,232	1.234	1.036	14.4	84.0
Rio Grande do Sul	318,016	768	528	24.5	68.8
Santa Catarina	105,792	431	336	17.7	78.0
	639,040	2.433	1.900	18.9	76.9
Brazil	8,596,320	11.427	7.759	49.4	64.7