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2000-2014年徐州地区土壤侵蚀的变化趋势
王国斌1, 陈报章1, 孙少波2, 李彦鹏1, 梁森3, 渠俊峰1
1.中国矿业大学 环境与测绘学院, 江苏 徐州 221008;2.天津大学 表层地球系统科学研究院, 天津 300072;3.徐州市水利科学研究所, 江苏 徐州 221003
摘要:
[目的]精确估算江苏省徐州市黄泛平原及丘陵地区土壤侵蚀量并探究其时空变化规律,为区域水土流失监测和防治提供合理依据。[方法]应用USLE模型计算出徐州黄泛平原和丘陵地区2000-2014年的土壤侵蚀模数,逐年统计侵蚀模数的最大值、平均值,不同等级侵蚀面积,分析这些指标15 a间的变化规律,并计算出多年来侵蚀模数的回归系数分布,从时间尺度和空间尺度阐述徐州地区土壤侵蚀程度的变化规律。[结果]①徐州黄泛平原和丘陵地区的土壤侵蚀以轻度(排除微度)侵蚀为主,其中丘陵地区侵蚀具有带状分布特征,并且侵蚀等级跨度更大;②徐州地区的水土流失在逐渐减弱,其中丘陵地区的侵蚀减弱程度和显著性大于黄泛平原;③各等级侵蚀面积随侵蚀程度的加重逐级递减,黄泛平原极强度侵蚀面积控制在5%以内,丘陵地区极强度侵蚀面积控制在10%以内,两区域剧烈侵蚀均得到了遏制;④侵蚀减弱程度较大的地区多分布于各河流域及湖泊周围,并且变化显著性强的区域也多分布于各河流附近。[结论]多年来徐州地区土壤侵蚀程度总体上有所减弱,各河流域侵蚀减弱尤为明显,但在黄泛平原的某些地区侵蚀仍在加重,徐州市有关部门应在这些区域加强防治力度。
关键词:  土壤侵蚀  土壤侵蚀模型(USLE)  黄泛平原  丘陵地区  徐州市
DOI:10.13961/j.cnki.stbctb.2019.01.007
分类号:
基金项目:江苏省水利科技项目"徐州市黄泛平原及丘陵地区水土流失遥感监测技术应用研究"(2016067)
Change of Soil Erosion in Xuzhou Area from 2000 to 2014
Wang Guobin1, Chen Baozhang1, Sun Shaobo2, Li Yanpeng1, Liang Sen3, Qu Junfeng1
1.School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China;2.Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China;3.Xuzhou Water Conservancy Science Research Institute, Xuzhou, Jiangsu 221003, China
Abstract:
[Objective] To accurately estimate the amount of soil erosion in flood plain of the Yellow River and hilly regions of Xuzhou City, Jiangsu Province, and explore its temporal and spatial variation, in order to provide reasonable basis for the monitoring and prevention of soil erosion in the region. [Methods] We used USLE model to calculate the soil erosion modulus in flood plain of the Yellow River and the hilly area in Xuzhou City from 2000 to 2014. The maximum, average and grades of the erosion modulus were statistically calculated, and the variation regularity of these indexes over 15 years was analyzed. The regression coefficient image of erosion modulus over the years was calculated, and the variation of soil erosion degree in Xuzhou City was revealed at temporal and spatial scale. [Results] ① Soil erosion in flood plain of the Yellow River and the hilly area of Xuzhou City was dominated by mild erosion, and the erosion in the hilly area showed a zonal distribution with greater erosion grade range. ② Soil and water loss in the Xuzhou City area was gradually weakening, and the intensity and significance of erosion in the hilly area was greater than that in flood plain. ③ The eroded area at each level decreased gradually with the increase of the erosion degree. The extremely intensive erosion area in the flood plain was controlled within 5%, while the erosion area of the extreme intensive in the hill area was controlled within 10%, and the severe erosion in both areas was contained. ④ The areas with greater erosion reduction were mostly distributed around river and lakes, and the regions with significant variations were also distributed near the rivers. [Conclusion] The intensity of soil erosion in Xuzhou City has been weakened over the years, especially in the river basin. However, in some areas of the flood plain, erosion is still increasing. The relevant departments in Xuzhou City should strengthen prevention and control efforts in these areas.
Key words:  soil erosion  USLE model  the flood plain of the Yellow River  hill area  Xuzhou City