A simple model for predicting soil infiltration rate for vertical line source irrigation

doi:10.1088/1755-1315/569/1/012068

	A simple model for predicting soil infiltration rate for vertical line source irrigation
	Wang, Ying 1; Gong, Jiaguo 1; Fan, Yanwei2
	2020
会议名称	3rd International Workshop on Environment and Geoscience, IWEG 2020
会议录名称	IOP Conference Series: Earth and Environmental Science
卷号	569
期号	1
会议日期	July 18, 2020 - July 20, 2020
会议地点	Chengdu, China
出版者	IOP Publishing Ltd
摘要	In this study, HYDRUS-2D was used to simulate the soil infiltration rate of vertical line source irrigation (VLSI) under different soil textures and initial water contents, as well as for different lengths, diameters and buried depths of the line source. The soil texture, diameter and length of the line source are the dominant influential factors of the soil infiltration rate of VLSI, whereas the initial water content and buried depth of the line source are less influential. The variation of soil infiltration rate is in accordance with the Philip model. The model parameters, i.e., sorptivity (S) and steady infiltration rate (A), increase as the diameter (D) and length (L) of line source increases. A power function between S and D and L, and one between A and D and L, were established. The exponential value of the power function was determined based on the HYDRUS simulation results, thereby obtaining a simplified estimation model of the soil infiltration rate of VLSI containing D and L. The effectiveness of the simplified model was verified based on a laboratory experiment and currently available research. The MAE (mean absolute error, MAE) is 0.056-0.348, RMSE (Root mean square error, RMSE) is 0.073-0.442, PBIAS (percentage bias, PBIAS) is 1.642-2.893, and NSE (Nash-Sutcliffe efficiency coefficient, NSE) is close to 1 (NSE≥0.973), indicating that the model has a high accuracy and can therefore be used for estimating the soil infiltration rate of VLSI. The simplified estimation model established in this study has only two undetermined parameters that can be obtained based on only one set of experimental data, simplifying the experimental scheme and improving the work efficiency. © 2020 Institute of Physics Publishing. All rights reserved.
关键词	Efficiency Geology Irrigation Mean square error Soil moisture Textures VLSI circuits Efficiency coefficient Experimental scheme Influential factors Initial water contents Laboratory experiments Root mean square errors Steady infiltration rate Vertical line source
DOI	10.1088/1755-1315/569/1/012068
收录类别	EI
语种	英语
EI入藏号	20204309402495
EI主题词	Infiltration
ISSN	17551307
来源库	Compendex
分类代码	481.1 Geology - 483.1 Soils and Soil Mechanics - 714.2 Semiconductor Devices and Integrated Circuits - 821.3 Agricultural Methods - 913.1 Production Engineering - 922.2 Mathematical Statistics
引用统计	被引频次[WOS]：0 [WOS记录] [WOS相关记录]
文献类型	会议论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/118185
专题	能源与动力工程学院
通讯作者	Gong, Jiaguo
作者单位	1.China Inst Water Resources & Hydropower Res, State Key Lab Simulat & Regulat Water Cycle River, Beijing 100038, Peoples R China; 2.Lanzhou Univ Technol, Coll Energy & Power Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Wang, Ying,Gong, Jiaguo,Fan, Yanwei. A simple model for predicting soil infiltration rate for vertical line source irrigation[C]:IOP Publishing Ltd,2020.