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陈国清,赵银军,莫德丽,梁珊,谢余初,童凯.广西南流江流域降雨侵蚀力时空变化特征[J].广西科学,2020,27(3):303-310. [点击复制]
- CHEN Guoqing,ZHAO Yinjun,MO Deli,LIANG Shan,XIE Yuchu,TONG Kai.Spatio-temporal Variation Characteristics of Rainfall Erosivity in Nanliujiang River Basin,Guangxi[J].Guangxi Sciences,2020,27(3):303-310. [点击复制]
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| 广西南流江流域降雨侵蚀力时空变化特征 |
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陈国清1,2, 赵银军1,2, 莫德丽2, 梁珊2, 谢余初1,2, 童凯1,2
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| (1.南宁师范大学, 北部湾环境演变与资源利用教育部重点实验室/广西地表过程与智能模拟重点实验室, 广西南宁 530001;2.南宁师范大学, 地理科学与规划学院, 广西南宁 530001) |
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| 摘要: |
| 降雨是区域土壤侵蚀的主要动力因素之一，估算和分析降雨侵蚀力是区域水土流失治理与评价的基础工作。利用南流江流域内各气象站点1961—2006年的日雨量资料，基于日雨量模型估算降雨侵蚀力，并通过趋势分析、小波分析和Kriging空间插值法，定量分析广西沿海红壤区南流江流域降雨侵蚀力的时空变化特征与规律。结果显示，1961—2006年间，南流江流域年均降雨侵蚀力为13 935.5 MJ·mm·hm-2·h-1·a-1，年均降雨量为1 712.8 mm，降雨侵蚀力变化周期约为14 a。各年际和时间段间变化差异不明显，降雨侵蚀力年内集中分布在夏季，占比达57.0%，冬季最小，占比3.8%；在空间上，降雨侵蚀力与降雨量分布格局相似，呈现从西南沿海向东北内陆递减的趋势，行政区划上以钦南区和合浦县最大，北流市和玉州区最小。研究结果可为南流江流域土壤侵蚀风险和生态修复治理等工作提供一定的科学依据。 |
| 关键词: 日降雨量 降雨侵蚀力 时空分布 南流江流域 土壤侵蚀 |
| DOI：10.13656/j.cnki.gxkx.20200630.001 |
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| 基金项目:国家自然科学基金项目（41761039，41661085），广西自然科学基金项目（2016GXNSFBA380047），广西研究生教育创新计划项目（YCSW2019180）和广西科技基地和人才专项（桂科AD19110140）资助。 |
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| Spatio-temporal Variation Characteristics of Rainfall Erosivity in Nanliujiang River Basin,Guangxi |
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CHEN Guoqing1,2, ZHAO Yinjun1,2, MO Deli2, LIANG Shan2, XIE Yuchu1,2, TONG Kai1,2
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| (1.Key Laboratory of Environment Change and Resources Use in Beibu Gulf of Ministry of Education/Key Laboratory of Earth Surface Process and Intelligent Simulation, Nanning Normal University, Nanning, Guangxi, 530001, China;2.School of Geography and Planning, Nanning Normal University, Nanning, Guangxi, 530001, China) |
| Abstract: |
| Rainfall is one of the main dynamic factors of regional soil erosion.Estimating and analyzing rainfall erosivity is the basic work of regional soil erosion control and evaluation.Using the daily rainfall data of each weather station in Nanliujiang River Basin from 1961 to 2006,the rainfall erosivity is estimated based on the daily rainfall model.Trend analysis,wavelet analysis and Kriging spatial interpolation method are used to quantitatively analyze the temporal and spatial variation characteristics and laws of rainfall erosivity in Nanliujiang River Basin in the red soil area along the coast of Guangxi.The results show that from 1961 to 2006,the annual average rainfall erosivity in Nanliujiang River Basin was 13 935.5 MJ·mm·hm-2·h-1·a-1 and the average annual rainfall was 1 712.8 mm.The change period of rainfall erosivity is about 14 a.The variation between different years and time periods is not obvious.The rainfall erosivity is concentrated in summer seasons,accounting for 57.0%,and the smallest in winter,accounting for 3.8%.Spatially,the rainfall erosivity is similar to the rainfall distribution pattern,showing a decreasing trend from the southwest coast to the northeast inland.The administrative division is the largest in Qinnan District and Hepu County,and the smallest in Beiliu City and Yuzhou District.The research results can provide a certain scientific basis for the work of soil erosion risk and ecological restoration in the Nanliujiang River Basin. |
| Key words: daily rainfall rainfall erosivity spatio-temporal distribution Nanliujiang River Basin soil erosion |
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