Calculation of reference crop evapotranspiration in Shaanxi province based on ANFIS

Ke-li LI; Xin ZHANG

doi:10.31497/zrzyxb.20200618

Journal of Natural Resources, Volume. 35, Issue 6, 1472(2020)

Calculation of reference crop evapotranspiration in Shaanxi province based on ANFIS

Ke-li LI and Xin ZHANG^*

College of Water Resources and Architectural Engineering, Northwest Agriculture and Forestry University, Yangling 712100, Shaanxi, China

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Fig. 2. Diagram showing ANFIS model structure

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Table 1. Location of meteorological sites and mean value of meteorological factors

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Table 1. Location of meteorological sites and mean value of meteorological factors

站点		纬度/(°)	经度/(°)	海拔高度/m	平均值（1960—2016年）
站点		纬度/(°)	经度/(°)	海拔高度/m	T_max/℃	T_min/℃	T_mean/℃	n/h	R_H/%	u₂/(m·s^-1)
陕南	安康	32.72	109.03	290.8	21.08	11.94	16.51	4.67	73.38	0.98
	汉中	33.07	107.03	509.5	19.46	11.18	15.32	4.29	78.93	0.81
关中	华县	34.52	109.73	341.5	19.77	8.31	14.04	5.46	72.85	1.18
	太白	34.03	107.32	1543.6	14.72	2.83	8.78	5.46	70.58	1.72
陕北	延安	36.58	109.45	1180.5	17.42	4.42	10.92	6.84	59.98	1.30
	榆林	38.27	109.78	1157.0	15.69	2.42	9.05	7.66	54.90	1.69

Table 2. Accuracy of ANFIS model under different meteorological factors

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Table 2. Accuracy of ANFIS model under different meteorological factors

模型	气象因子	R²						R_MSE/(mm·d)						MRE/%
模型	气象因子	安康	汉中	华县	太白	延安	榆林	安康	汉中	华县	太白	延安	榆林	安康	汉中	华县	太白	延安	榆林
ANFIS 1	T_max、T_min	0.934	0.925	0.865	0.853	0.903	0.884	0.426	0.426	0.666	0.562	0.539	0.728	13.312	13.037	24.711	22.917	15.010	20.559
ANFIS 2	T_max、T_min、n	0.981	0.989	0.955	0.962	0.956	0.921	0.223	0.161	0.363	0.281	0.360	0.609	8.434	6.123	13.850	13.010	10.716	16.644
ANFIS 3	T_max、T_min、R_H	0.948	0.935	0.919	0.921	0.946	0.941	0.375	0.418	0.511	0.497	0.400	0.489	10.838	12.208	16.733	18.442	12.135	12.140
ANFIS 4	T_max、T_min、u₂	0.944	0.927	0.895	0.902	0.935	0.903	0.391	0.429	0.57	0.437	0.450	0.677	11.170	12.743	18.799	14.359	12.755	18.910
ANFIS 5	T_max、T_min、n、u₂	0.990	0.996	0.98	0.973	0.977	0.972	0.166	0.093	0.237	0.303	0.274	0.349	5.591	3.514	8.553	11.589	8.586	9.087
ANFIS 6	T_max、T_min、R_H、n	0.991	0.992	0.984	0.980	0.982	0.959	0.156	0.134	0.222	0.224	0.238	0.441	5.762	5.210	7.762	8.199	7.817	12.945
ANFIS 7	T_max、T_min、R_H、u₂	0.958	0.938	0.931	0.937	0.967	0.966	0.340	0.411	0.458	0.362	0.312	0.369	8.668	11.336	13.589	12.221	7.931	9.148
ANFIS 8	T_max、T_min、R_H、n、u₂	0.998	0.999	0.995	0.989	0.997	0.995	0.077	0.058	0.113	0.160	0.106	0.141	2.784	2.168	4.777	6.231	3.456	4.633

Table 3. Comparison of accuracy between ANFIS model and other models

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Table 3. Comparison of accuracy between ANFIS model and other models

模型	气象因子	R²						R_MSE/(mm·d)						MRE/%
模型	气象因子	安康	汉中	华县	太白	延安	榆林	安康	汉中	华县	太白	延安	榆林	安康	汉中	华县	太白	延安	榆林
ANFIS 1	T_max、T_min	0.934	0.925	0.865	0.853	0.903	0.884	0.426	0.426	0.666	0.562	0.539	0.728	13.312	13.037	24.711	22.917	15.010	20.559
HS		0.916	0.925	0.884	0.849	0.848	0.845	0.837	0.750	0.739	0.800	0.807	0.770	28.935	31.463	25.935	27.289	26.600	24.194
ANFIS 2	T_max、T_min、n	0.981	0.989	0.955	0.962	0.956	0.921	0.223	0.161	0.363	0.281	0.360	0.609	8.434	6.123	13.850	13.010	10.716	16.644
Makkink		0.948	0.960	0.922	0.943	0.929	0.885	0.632	0.531	0.446	0.463	0.737	1.027	21.405	20.400	23.338	17.931	21.517	23.193
Iramk		0.955	0.960	0.933	0.934	0.920	0.885	0.403	0.377	0.535	0.387	0.532	0.787	18.761	20.595	18.865	19.389	18.125	23.800

Table 4. Portability results of ANFIS models between different sites in Shaanxi province

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Table 4. Portability results of ANFIS models between different sites in Shaanxi province

模型	训练站点	预报站点	R²	R_MSE/(mm·d)	MRE/%
ANFIS 5	安康	汉中	0.992	0.134	5.210
		华县	0.980	0.243	9.925
	华县	太白	0.982	0.222	8.532
		汉中	0.991	0.154	6.177
	延安	榆林	0.957	0.440	13.920
		华县	0.978	0.268	12.243
ANFIS 6	汉中	安康	0.994	0.126	3.843
		太白	0.983	0.247	9.995
	太白	华县	0.972	0.454	14.965
		安康	0.974	0.489	19.064
	榆林	延安	0.972	0.330	10.001
ANFIS 7	安康	汉中	0.942	0.372	10.139
		华县	0.925	0.510	14.554
	华县	太白	0.940	0.347	10.518
		汉中	0.930	0.406	11.153
	延安	榆林	0.960	0.413	10.146
		华县	0.929	0.492	14.48
ANFIS 8	汉中	安康	0.997	0.095	2.890
		太白	0.994	0.141	5.545
	太白	华县	0.990	0.252	8.885
		安康	0.992	0.289	11.182
	榆林	延安	0.995	0.125	4.241

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Ke-li LI, Xin ZHANG. Calculation of reference crop evapotranspiration in Shaanxi province based on ANFIS[J]. Journal of Natural Resources, 2020, 35(6): 1472

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Paper Information

Received: Apr. 11, 2019

Accepted: --

Published Online: Oct. 17, 2020

The Author Email: ZHANG Xin (zhxin@nwsuaf.edu.cn)

DOI:10.31497/zrzyxb.20200618

Topics

Resource Economy

Research Articles

Table 1. Location of meteorological sites and mean value of meteorological factors

Table 1. Location of meteorological sites and mean value of meteorological factors

Table 2. Accuracy of ANFIS model under different meteorological factors

Table 2. Accuracy of ANFIS model under different meteorological factors

Table 3. Comparison of accuracy between ANFIS model and other models

Table 3. Comparison of accuracy between ANFIS model and other models

Table 4. Portability results of ANFIS models between different sites in Shaanxi province

Table 4. Portability results of ANFIS models between different sites in Shaanxi province

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