激光微地貌扫描仪测定侵蚀过程中地表糙度
为研究激光微地貌扫描仪用于测定南方红壤地区地表微地貌的演变特征和规律的可行性，该研究应用亚毫米级高精度激光扫描和计算机数字图像处理相结合的方法，在野外原位研究了鄂南3个典型红壤（泥质页岩发育红壤、第四纪红黏土发育红壤1和第四纪红黏土发育红壤2）模拟降雨条件下坡面侵蚀过程中的地表糙度变化过程，初步探讨了降雨和径流对红壤坡面微地貌形态演变作用。结果表明：1）随着降雨进行，雨滴打击和径流搬运的联合作用导致地表糙度降低，间歇式降雨后，供试土壤泥质页岩发育红壤、第四纪红黏土发育红壤1和第四纪红黏土发育红壤2的地表糙度分别降低了18.2%、18.4%和11.8%；2）地表糙度变化主要发生在降雨初期，第1场...
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| Published in | 农业工程学报 Vol. 30; no. 22; pp. 155 - 162 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
江西省水土保持科学研究院 江西省土壤侵蚀与防治重点实验室，南昌 330029
2014
华中农业大学农业部长江中下游耕地保育重点实验室，武汉 430070%华中农业大学农业部长江中下游耕地保育重点实验室，武汉 430070 湖北省水利水电科学研究院，武汉 430070%华中农业大学农业部长江中下游耕地保育重点实验室,武汉,430070 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1002-6819 |
| DOI | 10.3969/j.issn.1002-6819.2014.22.019 |
Cover
| Abstract | 为研究激光微地貌扫描仪用于测定南方红壤地区地表微地貌的演变特征和规律的可行性，该研究应用亚毫米级高精度激光扫描和计算机数字图像处理相结合的方法，在野外原位研究了鄂南3个典型红壤（泥质页岩发育红壤、第四纪红黏土发育红壤1和第四纪红黏土发育红壤2）模拟降雨条件下坡面侵蚀过程中的地表糙度变化过程，初步探讨了降雨和径流对红壤坡面微地貌形态演变作用。结果表明：1）随着降雨进行，雨滴打击和径流搬运的联合作用导致地表糙度降低，间歇式降雨后，供试土壤泥质页岩发育红壤、第四纪红黏土发育红壤1和第四纪红黏土发育红壤2的地表糙度分别降低了18.2%、18.4%和11.8%；2）地表糙度变化主要发生在降雨初期，第1场降雨前后，泥质页岩发育红壤、第四纪红黏土发育红壤1和第四纪红黏土发育红壤2的地表糙度降低幅度分别为16.1%、19.7%和9.6%，均达到显著水平。采用亚毫米级高精度激光扫描和计算机数字图像处理相结合的方法，能很好地定量化研究坡面水蚀过程中地表糙度的演变特征和规律。研究为南方红壤区坡面水蚀过程中地表微地貌的研究提供一定的参考，对土壤侵蚀过程模拟与预测模型的研究具有一定的参考价值。 |
|---|---|
| AbstractList | P334.2; 为研究激光微地貌扫描仪用于测定南方红壤地区地表微地貌的演变特征和规律的可行性，该研究应用亚毫米级高精度激光扫描和计算机数字图像处理相结合的方法，在野外原位研究了鄂南3个典型红壤（泥质页岩发育红壤、第四纪红黏土发育红壤1和第四纪红黏土发育红壤2）模拟降雨条件下坡面侵蚀过程中的地表糙度变化过程，初步探讨了降雨和径流对红壤坡面微地貌形态演变作用。结果表明：1）随着降雨进行，雨滴打击和径流搬运的联合作用导致地表糙度降低，间歇式降雨后，供试土壤泥质页岩发育红壤、第四纪红黏土发育红壤1和第四纪红黏土发育红壤2的地表糙度分别降低了18.2%、18.4%和11.8%；2）地表糙度变化主要发生在降雨初期，第1场降雨前后，泥质页岩发育红壤、第四纪红黏土发育红壤1和第四纪红黏土发育红壤2的地表糙度降低幅度分别为16.1%、19.7%和9.6%，均达到显著水平。采用亚毫米级高精度激光扫描和计算机数字图像处理相结合的方法，能很好地定量化研究坡面水蚀过程中地表糙度的演变特征和规律。研究为南方红壤区坡面水蚀过程中地表微地貌的研究提供一定的参考，对土壤侵蚀过程模拟与预测模型的研究具有一定的参考价值。 为研究激光微地貌扫描仪用于测定南方红壤地区地表微地貌的演变特征和规律的可行性，该研究应用亚毫米级高精度激光扫描和计算机数字图像处理相结合的方法，在野外原位研究了鄂南3个典型红壤（泥质页岩发育红壤、第四纪红黏土发育红壤1和第四纪红黏土发育红壤2）模拟降雨条件下坡面侵蚀过程中的地表糙度变化过程，初步探讨了降雨和径流对红壤坡面微地貌形态演变作用。结果表明：1）随着降雨进行，雨滴打击和径流搬运的联合作用导致地表糙度降低，间歇式降雨后，供试土壤泥质页岩发育红壤、第四纪红黏土发育红壤1和第四纪红黏土发育红壤2的地表糙度分别降低了18.2%、18.4%和11.8%；2）地表糙度变化主要发生在降雨初期，第1场降雨前后，泥质页岩发育红壤、第四纪红黏土发育红壤1和第四纪红黏土发育红壤2的地表糙度降低幅度分别为16.1%、19.7%和9.6%，均达到显著水平。采用亚毫米级高精度激光扫描和计算机数字图像处理相结合的方法，能很好地定量化研究坡面水蚀过程中地表糙度的演变特征和规律。研究为南方红壤区坡面水蚀过程中地表微地貌的研究提供一定的参考，对土壤侵蚀过程模拟与预测模型的研究具有一定的参考价值。 |
| Abstract_FL | Soil surface microrelief plays an important role on the soil erosion processes like runoff, infiltration, soil sealing and sediment transport. However, there is relatively little study on the soil surface microrelief in soil erosion process and those studies are mostly conducted in the Loess Plateau in China. The purpose of this study was to study the feasibility of applying the Instantaneous-Profile Laser Scanner imported from the USA to determine the features and law of soil surface microrelief evolution in red soil region of Southern China. In this study, three soils derived from Quaternary red clay and Shale widely distributed in red soil region were selected, and the changes of soil surface microrelief during rainfall were studied in three intermittent rainfall events by using the Instantaneous-Profile Laser Scanner. With both its positional accuracy and elevational accuracy amounting to 0.5 mm, the Instantaneous-Profile Laser Scanner has been widely applied to the soil erosion process, soil physical property, statistical analysis of geography and topography etc. In the study, soil surface roughness obtained from the scanned image illustrated the changing process caused by the rainfall and runoff. The results showed that:1) With the intermittent rainfall continuing, the soil surface roughness decreased, resulting from the combined effect of the detachment of raindrop and the transport of runoff;After the third rainfall event, the surface roughness of soil derived from Shale, soil 1 derived from Quaternary red clay, and soil 2 derived from Quaternary red clay decreased 18.2%, 18.4%and 11.8%respectively;and 2) For all three soils, the greatest decrease of soil surface roughness was found in the first rainfall event, which differed from the other two rainfall events significantly. Specifically, the decreases of the surface roughness of soil derived from Shale (16.1%) and soil 1 derived from Quaternary red clay (19.7%) were much higher than that of soil 2 derived from Quaternary red clay (9.6%) for a higher aggregate water stability compared with the other two soils. For all three soils, in the first rainfall event, most aggregates were broken and soil crust began to form because of rainfall splash leading a sharp decrease of soil surface roughness. In the second and third rainfall event, the decreases of soil surface roughness event were not obvious for soil derived from Shale and soil 2 derived from Quaternary red clay. The crust formed on the soil 1 derived from Quaternary red clay during the third rainfall was prone to be destroyed due to its own unstable soil structure, leading to the increase of its roughness of soil surface. The application of submillimeter-level high-precision laser scanning and computer digital image processing method is in favor of researching quantitatively the characteristics and laws of soil surface microrelief changes during the process of water erosion on hillslope. Meanwhile, this paper throws a light on the study of the soil surface microrelief by discussing its status quo, directions and significance during the water erosion on hillslope. |
| Author | 张利超 杨伟 李朝霞 蔡崇法 王天巍 |
| AuthorAffiliation | 江西省水土保持科学研究院江西省土壤侵蚀与防治重点实验室,南昌330029 华中农业大学农业部长江中下游耕地保育重点实验室,武汉430070 湖北省水利水电科学研究院,武汉430070 |
| AuthorAffiliation_xml | – name: 江西省水土保持科学研究院 江西省土壤侵蚀与防治重点实验室，南昌 330029; 华中农业大学农业部长江中下游耕地保育重点实验室，武汉 430070%华中农业大学农业部长江中下游耕地保育重点实验室，武汉 430070; 湖北省水利水电科学研究院，武汉 430070%华中农业大学农业部长江中下游耕地保育重点实验室,武汉,430070 |
| Author_FL | Yang Wei Li Zhaoxia Wang Tianwei Zhang Lichao Cai Chongfa |
| Author_FL_xml | – sequence: 1 fullname: Zhang Lichao – sequence: 2 fullname: Yang Wei – sequence: 3 fullname: Li Zhaoxia – sequence: 4 fullname: Cai Chongfa – sequence: 5 fullname: Wang Tianwei |
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| DOI | 10.3969/j.issn.1002-6819.2014.22.019 |
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| Keywords | lasers 侵蚀 数字高程模型 糙度 激光 digital elevation model roughness 微地貌 erosion soils 土壤 microrelief |
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| Notes | 11-2047/S Soil surface microrelief plays an important role on the soil erosion processes like runoff, infiltration, soil sealing and sediment transport. However, there is relatively little study on the soil surface microrelief in soil erosion process and those studies are mostly conducted in the Loess Plateau in China. The purpose of this study was to study the feasibility of applying the Instantaneous-Profile Laser Scanner imported from the USA to determine the features and law of soil surface microrelief evolution in red soil region of Southern China. In this study, three soils derived from Quaternary red clay and Shale widely distributed in red soil region were selected, and the changes of soil surface microrelief during rainfall were studied in three intermittent rainfall events by using the Instantaneous-Profile Laser Scanner. With both its positional accuracy and elevational accuracy amounting to 0.5 mm, the Instantaneous-Profile Laser Scanner has been widely applied to the soil erosion process, soil phy |
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| Publisher | 江西省水土保持科学研究院 江西省土壤侵蚀与防治重点实验室，南昌 330029 华中农业大学农业部长江中下游耕地保育重点实验室，武汉 430070%华中农业大学农业部长江中下游耕地保育重点实验室，武汉 430070 湖北省水利水电科学研究院，武汉 430070%华中农业大学农业部长江中下游耕地保育重点实验室,武汉,430070 |
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| Snippet | 为研究激光微地貌扫描仪用于测定南方红壤地区地表微地貌的演变特征和规律的可行性，该研究应用亚毫米级高精度激光扫描和计算机数字图像处理相结合的方法，在野外原位研究... P334.2; 为研究激光微地貌扫描仪用于测定南方红壤地区地表微地貌的演变特征和规律的可行性，该研究应用亚毫米级高精度激光扫描和计算机数字图像处理相结合的方法，在野外... |
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| SubjectTerms | 侵蚀 土壤 微地貌 数字高程模型 激光 糙度 |
| Title | 激光微地貌扫描仪测定侵蚀过程中地表糙度 |
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