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| 引用本文: | 陈祎彤,李敏,司炳成, 等.宇宙射线中子法测量中尺度土壤含水率研究综述[J].灌溉排水学报,2021,(11):26-36. |
| CHEN Yitong,LI Min,SI Bingcheng, et al..宇宙射线中子法测量中尺度土壤含水率研究综述[J].灌溉排水学报,2021,(11):26-36. |
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| 宇宙射线中子法测量中尺度土壤含水率研究综述 |
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陈祎彤, 李敏, 司炳成, 等.
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1. 西北农林科技大学 旱区农业水土工程教育部重点实验室，陕西 杨凌 712100；2.萨斯喀彻温大学土壤科学系，加拿大 萨斯卡通市 S7N5A8；3.鲁东大学 资源与环境工程学院，山东 烟台 264000
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| 摘要: |
| 土壤含水率是农业生产与灌溉管理中的重要监测指标，而田间土壤含水率存在较大的时空变异性，作为目前测定区域土壤含水率的一种新方法，宇宙射线中子法具有连续测量、高精确度、对场地无破坏等优点，已被证明可以测量数百米范围内（中尺度）一定深度的平均土壤含水率。该方法在点尺度和遥感大尺度之间架起了桥梁，正逐渐运用于农业灌溉管理、水文数据同化和水文建模等领域。本文通过凝练近年来宇宙射线中子法的相关研究进展与成果，全面总结了其测量原理、监测范围、影响因素及校正原理，并重点阐述了该方法在农业、水文等领域的应用现状、现存问题及发展趋势。可为读者快速、详尽地了解宇宙射线中子法研究进展提供参考。目前，对宇宙射线中子法的改进与应用研究成果显著，但建筑区域标定的缺乏与道路区域标定的补充、空间灵敏度的校正、大高差跨度下的应用等问题亟须进一步研究和解决。 |
| 关键词: 土壤含水率；宇宙射线中子法；中尺度；原位监测；连续监测 |
| DOI：10.13522/j.cnki.ggps.2021262 |
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| Measuring Soil Water Content Using the Cosmic-ray Neutron Probe: A Review |
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CHEN Yitong, LI Min, SI Bingcheng, et al.
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Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, China; 2. Department of Soil Science, University of Saskatchewan, Saskatoon S7N5A8, Canada;
3. School of Resource and Environmental Engineering, University of Ludong, Yantai 264000, China
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| Abstract: |
| Soil moisture is an important index in agricultural production and irrigation management, but difficult to measure in the field due to its spatiotemporal heterogeneity. The cosmic-ray neutron probe method developed over the past decade has emerged as new technology to non-invasively monitor soil water change at large scales and at fine time resolutions. Previous studies have shown that it is able to measure average soil water content at a given depth over an aerial area spanning several hundred meters radially. As a method to bridge the gap between point measurement and large-scale soil water estimate using remote sensing, there have been an increase in its applications in various areas including irrigation management, hydrological data assimilation and hydrological modeling. The purpose of this paper is to review the latest research progress and achievements in the use of cosmic-ray neutron method. It covers principle of the method, its monitoring range, factors influencing its accuracy and applicability, as well as possible problems and solutions. We also outline its potential application in agriculture, hydrology and other fields. |
| Key words: soil water content; cosmic-ray neutron probe method; landscape scale; in-situ monitoring; continuous monitoring |
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