XU Xuanqing,CHEN Yuchan,LI Qingpu,et al.Effects of Landscape Patterns on Runoff and Sediment in Wuhua River Basin[J].Research of Soil and Water Conservation,2018,25(01):231-236,242.
五华河流域景观格局演变对径流泥沙的影响
- Title:
- Effects of Landscape Patterns on Runoff and Sediment in Wuhua River Basin
- 分类号:
- P332.5
- 摘要:
- 根据五华河流域1981—2011年逐月的气温、降水、径流量和输沙量数据，以及1991年、2000年和2011年的Landsat TM遥感影像，运用景观格局指数分析方法和统计学方法，从景观水平和斑块类型水平两方面探讨了景观格局演变对径流泥沙的影响。结果表明：景观水平上，景观多样性指数（SEI）和景观边缘密度（ED）与年径流量和年输沙量呈正相关，而景观形状指数（PSCV，AWMSI，AWMPFD）与年径流量、年输沙量、输沙量变差系数呈负相关。类型水平上，林地景观破碎度（PD）和边缘密度（ED）、草地形状指数和边缘密度，建筑用地的斑块破碎度与年径流量、输沙量有明显的正相关关系，而林地斑块形状指数，草地和耕地斑块破碎度，建筑用地边缘密度和形状指数则与年径流量和输沙量呈负相关关系。同时，林地斑块形状指数、草地和耕地斑块破碎度、建筑用地边缘密度和形状指数均与输沙量变差系数存在明显的正相关关系。
- Abstract:
- Soil erosion problem in Wuhua River Basin was concerned from the perspective of landscape pattern. Based on the temperature, rainfall, runoff, and sediment data in 1981 to 2011 and Landsat TM remote sensing images (1991, 2000, 2011), and landscape patterns (landscape-level and class-level), landscape pattern index analysis and statistical methods were used to analyze the effects of landscape patterns on runoff and sediment. The results showed that:at landscape level, landscape diversity index (SEI), and landscape edge density (ED) were positively associated with runoff and sediment, while landscape shape indexes (PSCV, AWMSI, AWMPFD) were negatively associated with runoff, sediment load, and sediment variation coefficient; at class level, the edge density (PD) and fragmentation (ED) of woodland, the shape index and edge density of grassland, and construction land fragmentation were closely related to runoff and sediment yield, while the patch shape index and area index of woodland, the patch fragmentation of grassland and farmland, the edge density, area and shape index of building land showed a negative relationship with runoff and sediment load; in addition, the shape index of woodland, fragmentation of grassland and arable land, and the edge density, plaque area and shape index of building land had significant positive correlation with sediment variation coefficient.
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备注/Memo
收稿日期:2017-1-26;改回日期:2017-4-18。
基金项目:国家自然科学基金项目“变化环境下南方湿热区韩江流域景观格局演变与生态水文耦合研究”（41471147）
作者简介:徐炫清(1993-),女,广东茂名人,硕士研究生从事景观格局与生态水文研究。E-mail:2219230845@qq.com
通讯作者:张正栋(1968-),男,甘肃榆中人,教授,硕士生导师,从事景观格局与生态水文、土地利用土地变化研究。E-mail:zhangzdedu@163.com