苏南丘陵区坡面经济林土壤侵蚀特征

杨瑞; 吴朝明; 朱骊; 胡海波

doi:10.12302/j.issn.1000-2006.202204036

苏南丘陵区坡面经济林土壤侵蚀特征

杨瑞, 吴朝明, 朱骊, 胡海波

南京林业大学学报（自然科学版） ›› 2023, Vol. 47 ›› Issue (6) : 70-76.

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南京林业大学学报（自然科学版） ›› 2023, Vol. 47 ›› Issue (6) : 70-76. DOI: 10.12302/j.issn.1000-2006.202204036

专题报道Ⅱ：山水林田湖草一体化保护和生态修复——土壤侵蚀修复研究（执行主编张金池）

苏南丘陵区坡面经济林土壤侵蚀特征

杨瑞 ¹ ,
吴朝明 ² ,
朱骊 ² ,
胡海波 ¹^,^*

作者信息 +

Study on soil erosion characteristics of economic forest slope field in southern Jiangsu hilly area

YANG Rui ¹ ,
WU Chaoming ² ,
ZHU Li ² ,
HU Haibo ¹^,^*

Author information +

文章历史 +

摘要

【目的】探索苏南丘陵区不同种植管理措施下经济林地土壤产沙产流特征。【方法】基于2021年无锡宜兴市标准径流小区观测资料,对其坡面产流产沙过程进行分析。【结果】①苏南丘陵经济林坡地产流产沙主要发生在5—8月,不同类型径流小区径流量占比大于72.5%、土壤侵蚀量占比大于68.7%。②不同径流小区径流量与土壤侵蚀量的对比均表现为:Ⅰ-桃林(有草)<Ⅱ-桃林(无草),径流小区Ⅰ较Ⅱ年减流156.3%、减沙122.9%;Ⅴ-茶园(横坡)<Ⅳ-茶园(顺坡),Ⅴ较Ⅳ径流小区年减流57.0%、年减沙41.5%;不同类型经济林年径流较Ⅲ-裸坡减少50.6%~380.4%、年侵蚀减少155.3%~513.1%。③次降雨下,Ⅰ—Ⅴ径流小区最大径流量、最大侵蚀量分别占全年的15.3%、14.5%、10.8%、12.5%、14.4%和7.9%、6.3%、4.5%、7.1%、8.0%,高强度降雨对坡面土壤侵蚀有重要影响。【结论】不同类型经济林径流小区土壤侵蚀量与降雨量、平均雨强、最大30 min降雨强度(I₃₀)以及径流深均呈显著正相关,与雨前土壤含水量等因素相关性较为复杂,其中坡面土壤侵蚀量与径流深关系最为密切(R²=0.553)。

Abstract

【Objective】 This study aims to explore the characteristics of surface runoff and sediment yield of economic forest land with different planting and management measures in the hilly region of Southern Jiangsu. 【Method】 Analyzing the process of runoff and sediment yield on the slope based on the observation data of runoff plots in Wuxi Yixing City in 2021. 【Result】 ① In the hilly region of Southern Jiangsu, the runoff and sediment yield of economic forest mainly occurred from May to August, in which the runoff and soil erosion yield of different runoff plots accounted for more than 72.5% and 68.7%, respectively. ② The comparison of slope runoff and erosion in different runoff plots is as follows: Ⅰ-peach forest (with grass) <Ⅱ-peach forest (weeding), and compared with Ⅱ, the annual runoff reduction of Ⅰwas 156.3% and the annual soil erosion reduction was 122.9%; Ⅴ-tea garden (cross slope) < Ⅳ-tea garden (along slope), and compared with Ⅳ, Ⅴ had an annual runoff reduction of 57.0% and erosion reduction of 41.5%. In addition to it, the annual runoff of different economic forest slopes was reduced by 50.6%-380.4%, and the annual soil erosion was reduced by 155.3%-513.1% compared with Ⅲ-bare slope (blank). ③ The maximum runoff and erosion of the Ⅰ-Ⅴ plots accounted for 15.3%, 14.5%, 10.8%, 12.5%, 14.4% and 7.9%, 6.3%, 4.5%, 7.1%, 8.0% of the total, respectively. It can be seen that high-intensity rainfall has an important impact on slope soil erosion. 【Conclusion】 Soil erosion in runoff plots of different economic forests was significantly positively correlated with rainfall, average rainfall intensity, I₃₀ and runoff depth, and the correlation with soil water content before rainfall was complex, in which soil erosion had the closest relationship with runoff depth (R²=0.553).

导出引用

杨瑞, 吴朝明, 朱骊, 等. 苏南丘陵区坡面经济林土壤侵蚀特征[J]. 南京林业大学学报（自然科学版）. 2023, 47(6): 70-76 https://doi.org/10.12302/j.issn.1000-2006.202204036

YANG Rui, WU Chaoming, ZHU Li, et al. Study on soil erosion characteristics of economic forest slope field in southern Jiangsu hilly area[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2023, 47(6): 70-76 https://doi.org/10.12302/j.issn.1000-2006.202204036

中图分类号： S714.7

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