摘要
水土流失是湖北省利川市面临的一项较为突出的生态问题,开展水土流失敏感性评估是制定水土保持措施的基础。采用RUSLE模型、热点分析、标准差椭圆分析和地理探测器等方法,对2002—2022年利川市水土流失敏感性的时空变化及其影响因素进行分析。结果表明,利川市水土流失总体上以微度敏感为主,但不同年份和地区的敏感程度存在明显差异;2002年,水土流失敏感性普遍较高,高值区域广泛分布在柏杨坝、团堡和文斗等地;2012年和2022年,东城、都亭和汪营等地敏感性略有上升,其他地区则普遍下降;水土流失热点区域面积逐渐缩减,分布范围向心聚集,重心向中心城区迁移;植被覆盖度和土地利用类型是影响水土流失敏感性空间分布的主要因素,植被覆盖度与坡度、土地利用和地层岩性的交互作用具有显著的空间叠加效应。未来应进一步关注植被覆盖度低、地形破碎、岩体软弱等地区的水土保持工作。
Soil erosion stands as a significant ecological challenge for Lichuan City,the sensitivity assessment of soil and water loss is the basis for formulating soil and water conservation measures.This study integrates the Revised Universal Soil Loss Equation(RUSLE)model,hotspot analysis,standard deviation ellipse,and geographical detector techniques to scrutinize the spatiotemporal dynamics of soil erosion sensitivity and its determinants in Lichuan City from 2002 to 2022.The results show that the sensitivity of soil and water loss in Lichuan City is mainly slight,but there are obvious differences in sensitivity in different years and regions.In 2002,extensive areas such as Baiyangba,Tuanbao,and Wendou exhibited relatively high sensitivity levels.However,by 2012 and 2022,a decline in sensitivity was observed in most regions,with the exception of an increasing trend in areas like Dongcheng,Duting,and Wangying.The spatial distribution of soil erosion hotspots has contracted,exhibiting a trend toward central aggregation,with the gravitational center shifting towards the central urban district.Vegetation coverage and land use types emerge as pivotal factors influencing the spatial distribution of soil erosion sensitivity.Notably,the interplay among vegetation coverage,slope gradient,land use,and lithological characteristics markedly amplifies the spatial distribution of sensitivity.In the future,more attention should be paid to soil conservation in areas with low vegetation coverage,broken terrain and weak rock mass.
作者
孙智杰
王艺霖
梁川
龙少秋
陈刚
Sun Zhijie;Wang Yilin;Liang Chuan;Long Shaoqiu;Chen Gang(Geological Environmental Center of Hubei Province,Wuhan,Hubei 430034;Hubei Key Laboratory of Resources and Eco-Environment Geology,Wuhan,Hubei 430034;Fourth Geological Brigade of Hubei Geological Bureau,Xianning,Hubei 437100)
出处
《资源环境与工程》
2024年第5期586-593,共8页
Resources Environment & Engineering
基金
湖北省地质局生态环境地质项目(42000023622T000000177,42000024622T000000421)。
关键词
水土流失
RUSLE模型
时空格局
地理探测器
利川市
soil erosion
RUSLE model
spatial-temporal pattern
geographical detector
Lichuan City
