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引用本文:彭雪,张璐,黄素珍,蔺庆伟,刘碧云,张义,吴振斌.基于回声探测监测沉水植物盖度的插值方法研究:以杭州西湖沉水植物盖度监测为例.湖泊科学,2020,32(2):472-482. DOI:10.18307/2020.0216
PENG Xue,ZHANG Lu,HUANG Suzhen,LIN Qingwei,LIU Biyun,ZHANG Yi,WU Zhenbin.Interpolation method for monitoring the coverage of submerged plants based on echo detection:Taking the monitoring of submerged plant coverage in West Lake of Hangzhou as an example. J. Lake Sci.2020,32(2):472-482. DOI:10.18307/2020.0216
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基于回声探测监测沉水植物盖度的插值方法研究:以杭州西湖沉水植物盖度监测为例
彭雪1,2, 张璐1,3, 黄素珍1,2, 蔺庆伟4, 刘碧云1, 张义1, 吴振斌1
1.中国科学院水生生物研究所淡水生态和生物技术国家重点实验室, 武汉 430072;2.中国科学院大学, 北京 100049;3.武汉理工大学资源与环境工程学院, 武汉 430072;4.河南师范大学生命科学学院, 新乡 453007
摘要:
沉水植物作为水生态系统的重要组成成分,在水生态系统物质循环和能量流动中发挥着重要作用,其覆盖度和生物量是评价湖泊等浅水水体系统稳定性的关键参数.随着高效和无损伤监测的回声探测仪在沉水植物盖度监测中的应用,其精确度算法也受到了越来越多的关注.本研究以成功恢复沉水植物的浅水湖泊杭州西湖为研究对象,利用BioSonics便携型回声探测仪——MX采集沉水植物回声样本.同时结合人工样方设置,采集与回声探测对应位点的沉水植物样本,验证回声探测结果的精确性.通过建立回归模型分析回声探测得到的沉水植物体积百分比(PVI)与人工样方获得的对应平均鲜重关系,结果表明二者具有较好的相关性.分别采用普通克里金法、反距离权重法、径向基函数法3种插值方法对同一季节的不同湖泊和同一湖泊的不同季节未采集区域沉水植物的盖度数据进行插值分析,并对插值结果进行交叉验证,以确定方法的精确度.交叉验证结果表明,插值精确度反距离权重法 > 径向基函数法 > 普通克里金法.研究结果为回声探测与插值分析方法结合在大尺度浅水水体中沉水植物监测应用提供了技术支撑.
关键词:  沉水植物  盖度  回声探测  GIS  空间插值  杭州西湖
DOI:10.18307/2020.0216
分类号:
基金项目:国家自然科学基金重点项目(31830013)、淡水生态与生物技术国家重点实验室项目(2017FB05)和宁夏回族自治区重点研究发展规划项目(2017BY087)联合资助.
Interpolation method for monitoring the coverage of submerged plants based on echo detection:Taking the monitoring of submerged plant coverage in West Lake of Hangzhou as an example
PENG Xue1,2, ZHANG Lu1,3, HUANG Suzhen1,2, LIN Qingwei4, LIU Biyun1, ZHANG Yi1, WU Zhenbin1
1.State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China;2.University of Chinese Academy of Sciences, Beijing 100049, P. R. China;3.School of Resource and Environmental Engineering, Wuhan University of Technology, Wuhan 430072, P. R. China;4.College of Life Science, Henan Normal University, Xinxiang 453007, P. R. China
Abstract:
Submerged plants are an important component of aquatic ecosystems and play a significant role in the matter cycling and energy flowing of aquatic ecosystems. The coverage and biomass of submerged plants are key parameters for evaluating the stability of shallow water systems such as lakes. Owing to the echo detector has the feature of high efficiency and no damage monitoring, it has been used in submerged plant coverage monitoring. Its accuracy algorithm has also received more and more attention. Hangzhou West Lake, a shallow lake that submerged plants restored successfully, was chosen in this study. The BioSonics portable echo detector-MX was used to collect submerged plant echo samples. It combined with the artificial sample setting simultaneously, the submerged plant samples corresponding to the echo detection spot location are collected to verify the accuracy of the echo detection results. By establishing regression model, the relationship between the percentage of submerged plant volume (PVI) and the corresponding average fresh weight respectively obtained by echo detection and artificial sample was analyzed, the results show that the two parameters have good correlation. Interpolation analysis was carried out on the coverage data of submerged plants through the same season of different lakes and different seasons of the same lake in the unacquired area by using three interpolation methods called Ordinary Kriging, Inverse distance weighted interpolation and Radial Basis Function (RBF). The interpolation results are cross-validated to ensure the accuracy of the method. The accuracy of three methods are Inverse distance weighted interpolation > Radial Basis Function > Ordinary Kriging. The results will provide the technical support for monitoring submerged plant using the echo detection and interpolation analysis methods combined in large-scale shallow water bodies.
Key words:  Submerged plants  coverage  echo detection  GIS  spatial interpolation  West Lake of Hangzhou
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