干旱区生态环境知识资源中心(Arid): GPR based RTM imaging technology for estimating rhizome diameters and application in the western China mining area

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	GPR based RTM imaging technology for estimating rhizome diameters and application in the western China mining area
其他题名	基于GPR逆时偏移成像技术的西部矿区植物根系直径估算试验研究
	Cui Fan; Li Shuai; Yuan Jiongxuan; Bai Jiebin; Zhao Yuxuan; Zhou Yingging
来源期刊	应用地球物理
ISSN	1672-7975
出版年	2020
卷号	17 期号:1 页码:154-166
中文摘要	植物根系的固砂、存水以及防止土壤沙漠化等功能对西部矿区的生态保护具有重要意义,精确计算植物地下根系的生物量可以对矿区的生态治理提供一定的技术支撑。而植物根系的直径作为生物量计算的一个重要指标参数,直接影响着根系生物量的计算结果。本研究提出了一种基于探地雷达逆时偏移(RTM) (成像技术的植物根系直径估算方法。首先基于时域有限差分(FDTD)原理对浅层地下植物根系的空间分布情况开展数值模拟,获取绕射波双曲线图像。然后结合RTM成像条件对数值模拟数据进行成像与单道分析,获取直接反映植物根系直径的指标参数:最大正波峰振幅为零的两个位置之间的距离(△h)和浅部最大正波峰上方的零振幅位置与深部最大正波峰下方的零振幅位置之间的距离(△H),并通过物理模型验证了数值模拟结果分析中求得的两个指标参数△h、△H对植物根茎直径估算的有效性。综合结果表明:指标参数△h和△H的值与根茎埋深无关,只与样本直径大小有关。当根茎直径在5 cm及以下时,△h可作为描述直径的指标参数;当根茎直径在5 cm以上时,△H可作为描述直径的指标参数。针对数值模拟和物理模型探测两种数据,△h和△H对植物根茎直径的估算误差分别可控制在6%和5%以下,这表明以探地雷达RTM成像为基础建立的根径估算方法是合理且有效的,估算精度满足技术要求。
英文摘要	The rhizome functions are of great significance to the ecological protection of the western China mining area, whose ecological management can be provided with technical support via accurate calculations of the rhizome biomass. The rhizome diameter is an important index parameter of rhizome biomass. In this study, we propose an estimation of rhizome diameters based on ground penetrating radar (GPR)-based reverse time migration (RTM) imaging technology. First, the spatial distribution of shallow rhizomes is simulated using the finite difference time domain method. The simulation data are examined via RTM imaging and single-channel rhizome analysis to obtain the rhizome index parameters: Deltah, the width of the maximum positive peak amplitude measured at an amplitude of zero, and DeltaH, the distance between the zero-amplitude position above the largest positive peak in the shallow region and the zero-amplitude position below the largest positive peak in the deeper region. The experiments of physical models verify the effectiveness of the two parameters (Deltah and DeltaH). and indicate that the values of Deltah and DeltaH are independent of the rhizome burial depth; instead, they are only related to the diameter of the rhizome. For both the numerical simulations and the physical model experiment, the estimation errors of Deltah and DeltaH for the rhizome diameters can be constrained to less than 6% and 5%, respectively, which shows that the estimation of the rhizome diameters using GPR based RTM imaging technology is reasonable and effective and its high estimation accuracy meets the technical requirements.
中文关键词	探地雷达 ; 西部矿区 ; RTM成像 ; 根径估算
英文关键词	Ground penetrating radar western China mining area RTM imaging rhizome diameter estimation
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:6767765
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336710
作者单位	崔凡, 煤炭开采水资源保护与利用国家重点实验室;;中国矿业大学(北京);;中国矿业大学(北京)地球科学与测绘工程学院, 煤炭开采水资源保护与利用国家重点实验室;;煤炭资源与安全开采国家重点实验室;;, ;;;;, 北京;;北京;;北京 100000;;100083;;100083, 中国.; 李帅, 中国矿业大学(北京)地球科学与测绘工程学院, 北京 100083, 中国.; 原炯轩, 中国矿业大学(北京)地球科学与测绘工程学院, 北京 100083, 中国.; 白洁玢, 中国矿业大学(北京)地球科学与测绘工程学院, 北京 100083, 中国.; 赵煜轩, 中国矿业大学(北京)地球科学与测绘工程学院, 北京 100083, 中国.; 周莹庆, 中国矿业大学(北京)地球科学与测绘工程学院, 北京 100083, 中国.
推荐引用方式 GB/T 7714	Cui Fan,Li Shuai,Yuan Jiongxuan,et al. GPR based RTM imaging technology for estimating rhizome diameters and application in the western China mining area[J],2020,17(1):154-166.
APA	Cui Fan,Li Shuai,Yuan Jiongxuan,Bai Jiebin,Zhao Yuxuan,&Zhou Yingging.(2020).GPR based RTM imaging technology for estimating rhizome diameters and application in the western China mining area.应用地球物理,17(1),154-166.
MLA	Cui Fan,et al."GPR based RTM imaging technology for estimating rhizome diameters and application in the western China mining area".应用地球物理 17.1(2020):154-166.