Ji Xiaoqi,Fan Haoming.Spatiotemporal Distribution of Natural Driving Factors of Soil Erosion in Northeast Mollisol Region[J].Research of Soil and Water Conservation,2024,31(05):130-138.[doi:10.13869/j.cnki.rswc.2024.05.033]
东北黑土区土壤侵蚀自然驱动因子时空分布特征
- Title:
- Spatiotemporal Distribution of Natural Driving Factors of Soil Erosion in Northeast Mollisol Region
- 文章编号:
- 1005-3409(2024)05-0130-09
- Keywords:
- composite erosion driving factors; spatiotemporal differentiation; superimposed mechanism; Mollisol region
- 分类号:
- S157.1
- 文献标志码:
- A
- 摘要:
- [目的]东北黑土区复合营力带来的土壤侵蚀作用明显,研究东北黑土区不同典型区间的土壤复合侵蚀自然驱动因子年内交替叠加情况,对于区域内土壤侵蚀治理具备现实意义。[方法]针对东北黑土区11个典型区域,利用气象及遥感等数据,通过分析对比不同区域水、风、冻、融作用自然驱动因子时空分布特征,阐明了各因子交替与叠加特点。[结果]在时间上,东北黑土区年内水力、风力、冻融、融雪作用驱动因子叠加交替出现,春季风力、冻融、融雪作用最为复杂,夏季以水力作用为主,秋季水力、风力、冻融复合作用有限,冬季风力、冻结作用明显。在空间上,水力驱动作用由东南向西北逐渐减小,风力作用由西南向东北逐渐减小,冻融作用由西南向东北逐渐减小,融雪作用呈现由西北向东南逐渐减小的趋势。根据侵蚀驱动因子分异特征将全区划分为水力、水力—融雪、水力—风力—冻融、水力—风力—融雪、水力—冻融—融雪侵蚀作用区。[结论]各营力表现出明显的时、空作用分异特点,根据自然驱动因子年内交替叠加情况得出了复合侵蚀驱动因子年内时空分布特征,为不同区域针对性土壤侵蚀治理、深化研究区复合侵蚀防控提供参考。
- Abstract:
- [Objective]Soil erosion caused by compound forces is obvious in Mollisol region, studying the annual alternating superposition of natural driving factors for soil composite erosion in different typical intervals in Northeast Mollisol Region has practical significance for soil erosion control in the region. [Methods]We analyzed and compared the spatiotemporal distribution of natural driving factors of water, wind, freeze-thaw, and snowmelt in 11 typical regions of the region, and clarified the alterative and superposition characteristics of each factor. [Results]In terms of time, the driving factors of hydraulic power, wind power, freeze-thaw and snowmelt in northeast Mollisol region occurred in superposition and alternation within the year. In spring, the driving factors of wind power, freeze-thaw and snowmelt were the most complex. In Summer, the driving factors of hydraulic power, wind power and freeze-thaw were the main driving factors. In autumn, the combined effects of hydraulic power, wind power and freezing and thawing were limited, while in winter, the effects of wind power and freezing were obvious. In terms of space, the hydraulic driving effect gradually decreased from southeast to northwest. Wind effect gradually decreased from southwest to northeast. The freeze-thaw effect gradually decreased from southwest to northeast. Snowmelt gradually decreased from northwest to southeast. According to the different characteristics of erosion driving factors, the whole region was divided into hydraulic, water-wind-freeze-thaw, water-wind-snow melt, water-freeze-thaw-snow melt erosion zones, and targeted soil erosion control could be carried out in different regions. [Conclusion]Each camp showed obvious temporal and spatial differences in their erosion performance.The characteristics of the composite erosion driving factors in a year were obtained based on the alternating superposition of natural driving factors within a year, providing reference for targeted soil erosion control and in-depth research on the composite erosion prevention and control in different regions.
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备注/Memo
收稿日期:2023-08-30 修回日期:2023-10-16
资助项目:国家重点研发计划(2021YFD1500701); 国家自然科学基金项目(41371272)
第一作者:季晓琪(2000—),女,辽宁朝阳人,在读硕士研究生,研究方向为土壤侵蚀规律。E-mail:2021220046@stu.syau.edu.cn
通信作者:范昊明(1972—),男,吉林白山人,博士,教授,主要从事土壤侵蚀规律、流域水沙等研究。E-mail:fanhaoming@163.com