基于低频探地雷达的土壤累积入渗量的探测方法研究

发布时间：2018-04-18 14:40

本文选题：低频探地雷达(GPR) + 土壤累积入渗量　；参考：《土壤学报》2017年04期

【摘要】：农田尺度上土壤累积入渗量的准确获取是目前土壤入渗研究中的难题。通过土工模拟和灌水实验,探讨利用低频探地雷达(GPR)技术探测土壤累积入渗量的方法。在分析灌水前后GPR剖面特征的基础上,分别构建和对比了基于波速法和振幅法的土壤累积入渗量计算模型。结果表明,基于振幅的探测模型在精度和稳定性方面均优于波速法,反射波振幅模型精度高于地面波模型,利用反射波波谷1构建的累积入渗量的GPR探测模型的决定系数达到0.96。因此,使用低频探地雷达可以实现对土壤累积入渗量的准确探测。研究结果为农田尺度上土壤累积入渗量的探测方法提供了一种新思路,同时,也为GPR在土壤学领域中的进一步应用提供了科学依据。
[Abstract]:It is a difficult problem to obtain soil cumulative infiltration amount on farmland scale.By means of geotechnical simulation and irrigation experiment, the method of detecting soil cumulative infiltration by using low frequency ground penetrating radar (GPR) technique is discussed.On the basis of analyzing the characteristics of GPR profile before and after irrigation, the calculation models of soil cumulative infiltration amount based on wave velocity method and amplitude method were constructed and compared respectively.The results show that the amplitude-based detection model is superior to the wave velocity method in terms of accuracy and stability. The accuracy of the reflected wave amplitude model is higher than that of the surface wave model. The determination coefficient of the GPR detection model based on the cumulative infiltration amount constructed by the reflected wave valley 1 is 0.96.Therefore, the low frequency ground penetrating radar can be used to detect the soil infiltration accurately.The results provide a new idea for detecting soil infiltration on farmland scale, and also provide scientific basis for the further application of GPR in the field of soil science.
【作者单位】：土肥资源高效利用国家工程实验室;山东农业大学资源与环境学院;
【基金】：国家自然科学基金项目(41401239) 山东省重点研发计划(2015GNC110010) 山东农业大学青年教师成长计划经费和青年创新基金(23694)共同资助~~
【分类号】：S152.72

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