1.黄河水土保持绥德治理监督局 绥德水土保持科学试验站, 陕西 榆林 719000
2.黄土高原水土保持野外科学观测研究站, 陕西 榆林 719000
3.黄土高原水土保持与生态修复国家;林业和草原局重点实验室, 陕西 榆林 719000
4.陕西黄河规划设计研究有限公司, 陕西 榆林 719000
郭锐(1988—),男(汉族),陕西省西安市人,硕士,主要从事水土保持、水文水资源等方面的研究。Email:304352014@qq.com。
李旭强(1993—),男(汉族),甘肃省会宁县人,硕士,主要从事水土保持、水文水资源等方面的研究。Email:15002677165@163.com。
收稿:2025-05-12,
修回:2025-09-28,
纸质出版:2025-12-10
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郭锐, 李旭强, 马瑞, 等.1991—2023年陕西省榆林市降雨侵蚀力时空变化[J].水土保持通报,2025,45(6):227-235.
Guo Rui, Li Xuqiang, Ma Rui, et al. Spatiotemporal variation of rainfall erosivity in Yulin City of Shaanxi Province during 1991—2023 [J]. Bulletin of Soil and Water Conservation,2025,45(6):227-235.
郭锐, 李旭强, 马瑞, 等.1991—2023年陕西省榆林市降雨侵蚀力时空变化[J].水土保持通报,2025,45(6):227-235. DOI: 10.13961/j.cnki.stbctb.2025.06.040. CSTR: 32312.14.stbctb.2025.06.040.
Guo Rui, Li Xuqiang, Ma Rui, et al. Spatiotemporal variation of rainfall erosivity in Yulin City of Shaanxi Province during 1991—2023 [J]. Bulletin of Soil and Water Conservation,2025,45(6):227-235. DOI: 10.13961/j.cnki.stbctb.2025.06.040. CSTR: 32312.14.stbctb.2025.06.040.
目的
2
探究榆林市降雨侵蚀力时空分布特征及变化趋势,为研究区域水土流失规律和制定水土保持工作提供理论指导。
方法
2
基于榆林市及周边18个气象站1991—2023年的日降雨量数据,利用日降雨量侵蚀力模型计算各站点的降雨侵蚀力值;运用统计分析方法,探讨分析榆林市33 a降雨侵蚀力时空分布特征及变化趋势。
结果
2
榆林市年均降雨侵蚀力为952.88 MJ·mm/(hm
2
· h · a),年均侵蚀性降雨量为270.87 mm;榆林市各站点降雨侵蚀力和侵蚀性降雨量年内分布不均,主要集中在夏秋两季;降雨侵蚀力和侵蚀性降雨量空间分布均呈从西北向东南递增。未来降雨侵蚀力除吴堡站延续过去的趋势之外,其余各站点均与过去相反;榆林市降雨侵蚀力和侵蚀性降雨量未来将会逐渐减小。
结论
2
榆林市年降雨侵蚀力呈波动上升趋势,各站点年际间降雨侵蚀力波动较大,区域未来降雨侵蚀力变化趋势预估呈减小态势。降雨侵蚀力变化趋向仍存在一定的不确定性,因此需加强水土保持治理和土壤侵蚀防治工作,特别是降雨侵蚀力上升的站点。
Objective
2
The spatiotemporal distribution characteristics and variation trends of rainfall erosivity in Yulin City of Shaanxi Province were explored , in order to provide theoretical guidance for studying the regional soil erosion patterns and formulating soil and water conservation measures.
Methods
2
Based on daily rainfall data collected at 18 meteorological stations in and around Yulin City from 1991 to 2023, the rainfall erosivity values at each station were calculated using a daily rainfall erosivity model. The spatiotemporal distribution characteristics and variation trends of rainfall erosivity over the past 33 years in Yulin City were then explored and analyzed using statistical methods.
Results
2
The annual average rainfall erosivity in Yulin City was 952.88 MJ·mm/(hm
2
·h·a), and the annual average erosive rainfall was 270.87 mm. The rainfall erosivity and erosive rainfall at each station in Yulin City were unevenly distributed throughout the year, mainly concentrated in summer and autumn. The spatial distribution patterns of rainfall erosivity and erosive rainfall were generally consistent, both showing an overall increasing trend from northwest to southeast. In the future, except for Wubao station which would continue its historical trend, the rainfall erosivity at all other stations was projected to show trends opposite to the past, with rainfall erosivity and erosive rainfall expected to gradually decrease.
Conclusion
2
The annual rainfall erosivity in Yulin City shows a fluctuating upward trend, with significant interannual fluctuations observed at various stations. The future trend of rainfall erosivity in this region is projected to decrease. However, significant uncertainties remain regarding its variation trend. Therefore, it is necessary to strengthen soil and water conservation management and soil erosion prevention, particularly at stations where rainfall erosivity shows an increasing trend.
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