Accuracy Evaluation of Standardized Precipitation Index (SPI) Estimation under Conventional Assumption in Yeşilırmak, Kızılırmak, and Konya Closed Basins, Turkey

Table 1

Some features of the rainfall stations in the study area.

Basin	Rainfall station		Longitude (E)	Latitude (N)	Elevation (meter)	Observation period	Mean (mm)
Yeşilirmak	1	Samsun	36°15′	41°21′	4	1975–2020	703.2
	2	Merzifon	35°27′	40°53′	754	1975–2012	439.5
	3	Corum	34°56′	40°32′	776	1975–2020	453.1
	4	Amasya	35°50′	40°40′	409	1975–2020	463.4
	5	Tokat	36°33′	40°20′	611	1975–2020	442.3
	6	Zile	35°53′	40°18′	719	1984–2020	444.7
	7	Sebinkarahisar	38°25′	40°17′	1364	1984–2020	436.5
	8	Turhal	36°06′	40°23′	528	1984–2020	413.1
	9	Susehri	38°04′	40°10′	1164	1985–2020	566.1
Kızılırmak	10	Kastamonu	33°47′	41°22′	800	1975–2020	511.3
	11	Cankiri	33°37′	40°36′	755	1975–2020	420.2
	12	Sivas	37°00′	39°45′	1294	1975–2020	455.4
	13	Kirikkale	33°31′	39°51′	751	1975–2020	390.2
	14	Yozgat	34°49′	39°50′	1301	1975–2020	604.5
	15	Kırsehir	34°09′	39°10′	1007	1975–2020	393.1
	16	Gemerek	36°05′	39°11′	1182	1975–2020	417.2
	17	Nevsehir	34°42′	38°37′	1260	1975–2020	429.2
	18	Kayseri	35°30′	38°41′	1094	1975–2020	410.6
	19	Bafra	35°55′	41°33′	103	1990–2020	487.7
	20	Ilgaz	33°38′	40°55′	885	1985–2020	340.3
	21	Tosya	34°02′	41°01′	870	1983–2020	464.2
	22	Osmancik	34°48′	40°59′	419	1984–2020	415.6
	23	Zara	37°44′	39°53′	1338	1985–2020	500.4
	24	Keskin	33°37′	39°40′	1140	1986–2020	409.0
	25	Cicekdagi	34°25′	39°36′	900	1984–2020	355.9
	26	Kaman	33°42′	39°22′	1075	1975–2020	469.1
	27	Bogazliyan	35°15′	39°12′	1070	1975–2020	367.9
	27	Urgup	34°55′	38°37′	1068	1975–2020	370.9
	29	Develi	35°29′	38°22′	1204	1975–2020	370.6
Konya Closed	30	Konya	32°34′	37°59′	1031	1975–2020	336.1
	31	Karaman	33°13′	37°12′	1018	1975–2020	348.0
	32	Eregli	34°03′	37°32′	1046	1975–2020	312.4
	33	Nigde	34°41′	37°57′	1211	1975–2020	347.6
	34	Kulu	33°04′	39°05′	1005	1975–2020	388.0
	35	Seydişehir	31°21′	38°04′	1158	1975–2020	772.3
	36	Cumra	32°47′	37°34′	1014	1975–2020	330.3
	37	Karapinar	33°32′	37°43′	996	1975–2020	307.1
	38	Aksaray	34°00′	38°22′	970	1975–2020	358.4