Parameters sensitivity and applicability evaluations of AnnAGNPS model in a small watershed of the Yangtze River Delta

doi:10.12302/j.issn.1000-2006.202005003

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2021, Vol. 45 ›› Issue (3): 183-192.doi: 10.12302/j.issn.1000-2006.202005003

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Parameters sensitivity and applicability evaluations of AnnAGNPS model in a small watershed of the Yangtze River Delta

ZHANG Shuifeng¹^,²(), ZHANG Jinchi¹^,^*(), ZHUANG Jiayao¹, WANG Xinmeng², ZHANG Siyu²

1. Jiangsu Province Key Laboratory of Soil and Water Conservation and Ecological Restoration,Co-Innovation Center for the Sustainable Forestry in Southern China,College of Forestry,Nanjing Forestry University,Nanjing 210037,China
2. College of Information Technology,Nanjing Forest Police College,Nanjing 210023,China

Received:2020-05-13 Revised:2020-08-24 Online:2021-05-30 Published:2021-05-31
Contact: ZHANG Jinchi E-mail:270847034@qq.com;zhang8811@njfu.edu.cn

Abstract

Abstract:

【Objective】 The sensitivity and applicability of the agricultural non-point source pollution model AnnAGNPS to the Peiqiao River watershed were studied to provide data supports and a scientific basis for the comprehensive watershed management in the Yangtze River Delta. 【Method】 The study area is Peiqiao River watershed of Shuiyang River system in the middle and lower reaches of the Yangtze River. A differential sensitivity analysis (DSA) method was used for a parameter sensitivity analysis, and the applicability of the model was comprehensively evaluated using correlation coefficient (R²), efficiency coefficient (E) and relative error (E_R). 【Result】 The parameter with the highest degree of output sensitivity to runoff, total nitrogen, total phosphorus and sediment in the studied area was the curve number (CN). Soil erosion factor (K), soil and water conservation factor (P), and crop management factor (C), all had positive correlations and effects. The R² and E of runoff, sediment, total nitrogen, and total phosphorus in the flood season and non-flood season from 2015 to 2018 were all greater than 0.80, and the absolute value of E_R was less than 12%. The simulation accuracy of runoff and sediment in the flood season was higher than that in the non-flood season, while the simulation accuracy of total nitrogen and total phosphorus in the non-flood season was slightly higher than that in the flood season. 【Conclusion】The calibrated AnnAGNPS model has a good simulation effect and reliable results in the Peiqiao River watershed and could be used to assist decision-makings on non-point source pollution and soil erosion management in a small agricultural watershed of the hill region of the Yangtze River Delta.

Key words: agricultural small watershed of the Yangtze River Delta, agricultural non-point source pollution model (AnnAGNPS), parameters sensitivity, applicability evaluation, Peiqiao River watershed

CLC Number:

S157

ZHANG Shuifeng, ZHANG Jinchi, ZHUANG Jiayao, WANG Xinmeng, ZHANG Siyu. Parameters sensitivity and applicability evaluations of AnnAGNPS model in a small watershed of the Yangtze River Delta[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2021, 45(3): 183-192.

Figures/Tables 7

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研究区 study area	面积/ km² area	临界源区面积/hm² CSA	最小源区沟道长度/m MSCL	水文响应单元数量 cells number	河段数量 reaches number	文献 references
中田河流域	47.85	6	50	897	377	[22]
山美水库流域	1 023.00	50	150	2 448	990	[23]
桃溪子流域	394.00	50	150	2 664	1 105	[23]
灞河流域	2 581.00	100	100	1 965	791	[24]
罗李村流域	743.80	100	70	1 030	420	[25]
岔口小流域	131.91	5	100	2 722	1 097	[33]
Red Rock Creek watershed 红石溪流域(美国)	136.00	100	130	169	-	[38]
Little River watershed 小河流域(美国)	333.00	50	100	841	342	[39]

参数 parameter	取值范围 range	径流深 (等级) runoff depth (rank)	泥沙 (等级) sediment (rank)	总氮 (等级) total nitrogen (rank)	总磷 (等级) total phosphorus (rank)
径流曲线数 runoff curve number	[30,100]	1.286 (Ⅳ)	0.386 (Ⅲ)	1.663 (Ⅳ)	1.144 (Ⅳ)
土壤可蚀性因子 K factor	[0.0,0.131 7]	0 (Ⅰ)	0.808 (Ⅲ)	0.165 (Ⅱ)	0.107 (Ⅱ)
田间持水量 field capacity	[凋萎点, 1.0]	-0.325 (Ⅲ)	-0.031 (Ⅰ)	0.193 (Ⅱ)	0.473 (Ⅲ)
土壤饱和导水率 saturated conductivity	[0.0, 254 000.0]	-0.003 (Ⅰ)	0 (Ⅰ)	0.012 (Ⅰ)	0.026 (Ⅰ)
凋萎点 wilting point	[0.0,1.0]	0.201 (Ⅲ)	0.019 (Ⅰ)	-0.163 (Ⅱ)	-0.064 (Ⅱ)
土壤有机质含量 organic matter ratio	[0.0,1.0]	0 (Ⅰ)	0 (Ⅰ)	0.812 (Ⅲ)	0.633 (Ⅲ)
作物冠层覆盖度 canopy cover	[0.0,1.0]	0.230 (Ⅲ)	0.013 (Ⅰ)	-0.012 (Ⅰ)	0.030 (Ⅰ)
肥料施用量 application rate	[0.0, 56 000.0]	0 (Ⅰ)	0 (Ⅰ)	0.181 (Ⅱ)	0.4 (Ⅲ)
作物管理因子 constant usle C-factor	[0.0,1.0]	0 (Ⅰ)	0.808 (Ⅲ)	0.165 (Ⅱ)	0.107 (Ⅱ)
水土保持因子 constant usle P-factor	[0.0,1.0]	0 (Ⅰ)	0.790 (Ⅲ)	0.154 (Ⅱ)	0.099 (Ⅱ)

年份 year	β₁=0.9	β₂=0.92	β₃=0.935	β₄=0.95
2008	0.412	0.400	0.379	0.361
2009	0.486	0.422	0.409	0.385
2010	0.427	0.393	0.372	0.344
2011	0.438	0.393	0.386	0.352
2012	0.425	0.401	0.394	0.373
2013	0.446	0.427	0.408	0.380
2014	0.465	0.417	0.405	0.392
2015	0.401	0.395	0.387	0.350
2016	0.479	0.458	0.422	0.397
2017	0.413	0.396	0.382	0.364
2018	0.383	0.371	0.359	0.337
2008—2018	0.434	0.407	0.391	0.367

项目 item	时间段 time zone	模拟时期 simulation period	R²	E	E_R/%
径流 ruoff	汛期flood season	率定期calibration period	0.846	0.813	-11.581
	汛期flood season	验证期validation period	0.873	0.842	-11.368
	非汛期non-flood season	率定期calibration period	0.825	0.765	-12.174
	非汛期non-flood season	验证期validation period	0.859	0.823	-11.632
泥沙 sediment	汛期flood season	率定期calibration period	0.895	0.842	10.072
	汛期flood season	验证期validation period	0.903	0.856	9.124
	非汛期non-flood season	率定期calibration period	0.876	0.839	10.113
	非汛期non-flood season	验证期validation period	0.893	0.847	9.936
总氮 total nitragen	汛期flood season	率定期calibration period	0.824	0.801	-9.922
	汛期flood season	验证期validation period	0.851	0.817	-7.176
	非汛期non-flood season	率定期calibration period	0.873	0.825	-7.368
	非汛期non-flood season	验证期validation period	0.902	0.863	-6.584
总磷 total phosphorus	汛期flood season	率定期calibration period	0.817	0.785	-10.120
	汛期flood season	验证期validation period	0.835	0.801	-9.543
	非汛期non-flood season	率定期calibration period	0.810	0.775	-7.915
	非汛期non-flood season	验证期validation period	0.857	0.839	-6.437

Parameters sensitivity and applicability evaluations of AnnAGNPS model in a small watershed of the Yangtze River Delta

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[1]	JI Xinyu, YU Yue, ZHANG Sifan, LIU Yuanyuan. The spatio-temporal characteristics of soil erosion in orchards of Dalian City based on the CSLE model [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2024, 48(3): 117-124.
[2]	YU Yue, ZHAO Lijun, ZHANG Wei, ZHANG Keli, LIU Liang. Spatio-temporal characteristic of soil loss on cropland slopes in different cultivation periods of the Black Soil Region in northeast China [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2023, 47(6): 51-60.
[3]	LIANG Zi’ao, WANG Xiangfu, WANG Weifeng, YAN Ke, LI Yuanhui, DONG Wenting, WANG Rongnü. Evaluation of soil conservation benefit of the Natural Forest Protection Project in Qinghai Province [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2023, 47(5): 181-188.
[4]	WANG Miaomiao, WANG Enheng, HAN Mingzhao, LI Yongjiang, YU Supu. Organic materials effects on black soil aggregate stability based on the Le Bissonnais method [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2023, 47(4): 191-199.
[5]	CHEN Chao, QI Fei, XU Yannan, LI Jiazuo, ZHAO Chuanpu, SU Xinyu. Sampling methods of soil erosion at county scale based on spatial autocorrelation [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2022, 46(3): 177-184.
[6]	WANG Baoyi, ZHANG Ronghua, JING Shasha, LI Huan, ZHANG Chunqiang, LI Jiazuo, SONG Yuanyuan, LUO Mengqi, ZHANG Guangcan. Effects of rainfall and slope gradient on runoff and sediment yield of subgrade slope [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2019, 43(02): 114-120.
[7]	WANG Jingjing, BI Huaxing^1,2,3,4*, SUN Yubo, DUAN Hangqi, PENG Ruidong. Improved model of canopy shading for fruit tree [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2018, 42(05): 135-140.
[8]	CHEN Zhuoxin, ZHANG Jinchi. Review of global soil and water conservation in last ten years [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2018, 42(03): 167-174.
[9]	HU Tianran, WANG Shuli. Factors affecting gully erosion Wuyuer River watershed of the black soil region [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2018, 42(01): 113-119.
[10]	SHU Zhengyue, WANG Jingyan, GONG Wei, LYU Xiangnan, YAN Siyu, CAI Yu, ZHAO Changping. Effects of compound management in citrus orchard on soil micro-aggregate fractal features and soil physical and chemical properties [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2017, 41(05): 92-98.
[11]	LU Guihong, YANG Shun^1,2,3, WANG Jun, OU Guoqiang. The mechanism of plant roots reinforcement on soil [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2014, 38(02): 151-156.
[12]	HU Gang,SONG Hui, ZHANG Mingli. Application evaluation of the bounding algorithm for breakline in grid DEM [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2014, 38(01): 140-144.
[13]	HU Hui, ZHANG Jinchi, ZHU Lijun, BI Feng, YANG Cong. Erosion rule of disturbed sandy soil by artificial simulated rainfall [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2012, 36(03): 149-152.
[14]	Wang Jinxin Huang Baolong(Northwest Sci tech University of Agriculture and Forestry\ Yangling\ 712100)\. A Review and Prospect of Runoff Forestry in Arid and Semiarid Regions in the World [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2000, 24(03): 5-10.
[15]	Wang Jinxin Huang Baolong(Northwest Sci tech University of Agriculture and Forestry\ Yangling\ 712100)\. A Study on Soil Water Conservation Coupling Effects of Water Absorbent and Water Permeable Plastic Film Mulching [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2000, 24(03): 11-16.