Table 4 The goodness of fit of the predictive model for estimation of the salinity of groundwater.

From: Computational assessment of groundwater salinity distribution within coastal multi-aquifers of Bangladesh

Models	Phase	R	RMSE	RAE	E_LM	KGE	I_A	U_95%
C1
ANFIS	Training	0.9596	1.0535	0.1646	0.9208	0.9428	0.9791	2.9218
ANFIS	Testing	0.9306	1.2139	0.2131	0.8639	0.9222	0.9643	3.3699
ANFIS-OA	Training	0.9559	1.1183	0.1835	0.9108	0.9032	0.9760	3.0775
ANFIS-OA	Testing	0.9450	1.1253	0.1878	0.8871	0.9146	0.9696	3.0632
ANFIS-SMA	Training	0.9283	1.4083	0.2105	0.8585	0.9260	0.9632	3.9054
ANFIS-SMA	Testing	0.9406	1.1534	0.1896	0.8830	0.8793	0.9690	3.1632
ANFIS-ACO	Training	0.9121	1.5501	0.2484	0.8286	0.8317	0.9488	4.2946
ANFIS-ACO	Testing	0.9402	1.1688	0.2205	0.8802	0.8653	0.9656	3.1822
Lasso-Reg	Training	0.9013	1.6215	0.2348	0.8124	0.8602	0.9461	4.4971
Lasso-Reg	Testing	0.9358	1.1863	0.2091	0.8700	0.8552	0.9628	3.2766
C2
ANFIS	Training	0.9761	0.8140	0.1529	0.9527	0.9662	0.9878	2.2577
ANFIS	Testing	0.9090	1.3857	0.2238	0.8226	0.8965	0.9525	3.8451
ANFIS-OA	Training	0.9300	1.3851	0.2000	0.8631	0.9208	0.9639	3.8397
ANFIS-OA	Testing	0.9374	1.1520	0.2091	0.8774	0.9100	0.9671	3.1931
ANFIS-SMA	Training	0.9292	1.4446	0.2531	0.8511	0.9119	0.9632	4.0001
ANFIS-SMA	Testing	0.9307	1.2801	0.2436	0.8486	0.8790	0.9626	3.5099
ANFIS-ACO	Training	0.9153	1.5079	0.2538	0.8378	0.8802	0.9544	4.1822
ANFIS-ACO	Testing	0.9322	1.1930	0.2276	0.8685	0.9022	0.9642	3.3110
Lasso-Reg	Training	0.9149	1.5110	0.2477	0.8371	0.8776	0.9541	4.1907
Lasso-Reg	Testing	0.9331	1.1874	0.2232	0.8697	0.8982	0.9644	3.2936
C3
ANFIS	Training	0.9740	0.8479	0.1604	0.9487	0.9633	0.9867	2.3516
ANFIS	Testing	0.9205	1.3513	0.2412	0.8313	0.9073	0.9586	3.7540
ANFIS-OA	Training	0.9491	1.1871	0.2035	0.8994	0.9144	0.9730	3.2817
ANFIS-OA	Testing	0.9378	1.1685	0.2083	0.8738	0.8849	0.9662	3.2104
ANFIS-SMA	Training	0.9002	1.6635	0.2433	0.8025	0.8861	0.9476	4.6038
ANFIS-SMA	Testing	0.9314	1.2634	0.2226	0.8525	0.8616	0.9619	3.4353
ANFIS-ACO	Training	0.9161	1.5012	0.2543	0.8392	0.8797	0.9548	4.1635
ANFIS-ACO	Testing	0.9312	1.2025	0.2317	0.8664	0.8995	0.9635	3.3366
Lasso-Reg	Training	0.9154	1.5070	0.2493	0.8380	0.8782	0.9543	4.1796
Lasso-Reg	Testing	0.9327	1.1907	0.2245	0.8690	0.8977	0.9641	3.3031
C4
ANFIS	Training	0.9482	1.1888	0.2145	0.8992	0.9268	0.9729	3.2971
ANFIS	Testing	0.9172	1.3274	0.2513	0.8372	0.9068	0.9571	3.6828
ANFIS-OA	Training	0.9392	1.2878	0.2227	0.8817	0.9202	0.9683	3.5697
ANFIS-OA	Testing	0.9402	1.1489	0.2073	0.8780	0.9121	0.9687	3.1689
ANFIS-SMA	Training	0.9168	1.4958	0.2454	0.8404	0.8735	0.9547	4.1479
ANFIS-SMA	Testing	0.9335	1.1882	0.2179	0.8696	0.8887	0.9641	3.2897
ANFIS-ACO	Training	0.9226	1.4447	0.2557	0.8511	0.8901	0.9586	4.0064
ANFIS-ACO	Testing	0.9367	1.1602	0.2326	0.8756	0.8851	0.9653	3.2158
Lasso-Reg	Training	0.9165	1.4977	0.2403	0.8399	0.8796	0.9550	4.1538
Lasso-Reg	Testing	0.9344	1.1781	0.2140	0.8718	0.8966	0.9650	3.2649

Significant values are in bold.

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Table 4 The goodness of fit of the predictive model for estimation of the salinity of groundwater.

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