PDF(1417 KB)
Experimental Study on Soil Erosion Characteristics of Engineering Excavated Slope
ZHANG Guan-hua,CHENG Dong-bing,ZHANG Ping-cang,NIU Jun,ZHANG Chang-wei
Journal of Changjiang River Scientific Research Institute ›› 2015, Vol. 32 ›› Issue (3) : 27-30.
PDF(1417 KB)
PDF(1417 KB)
Experimental Study on Soil Erosion Characteristics of Engineering Excavated Slope
Engineering excavated slope is the key source of soil and water loss in project construction. In this research, field simulated rainfall experiments were conducted to study the effects of slope gradient (30°, 40°, 50°) and rainfall intensity (0.65, 1.15, and 1.65 mm/min) on runoff and sediment yield characteristics of excavated slope. Results showed that both slope gradient and rainfall intensity have significant effect on runoff and sediment yield. As slope gradient increases, runoff and sediment parameter values increase in the presence of different rainfall intensities, with runoff rate being 0.47-0.72 mm/min, runoff coefficient 0.39-0.63, sediment rate 8.64-49.80 g/(m2·min), and sediment concentration 17.27-77.64 kg/m3. But in the presence of the same slope gradient, runoff rate increases with rainfall intensity increasing, and runoff coefficient has no obvious difference for medium (1.15 mm/min) and high (1.65 mm/min) rainfall intensity. For excavated slope of 30° gradient, the sediment rate increases with rainfall intensity increasing; while the sediment rate under medium and high rainfall intensities is very close when the slope gradient increases. For excavated slope of 50° gradient, the sediment rate and sediment concentration are high, low, and high respectively under the three rainfall intensities.
excavated slope / soil and water loss / runoff and sediment yield / rainfall intensity / simulated rainfall / construction project
赵 暄,谢永生,景民晓,等. 生产建设项目弃土堆置体的类型与特征.中国水土保持科学,2013, 11(1): 88-94. (ZHAO Xuan, XIE Yong-sheng, JING Min-xiao, et al. Types and Characteristics of Spoilbank in Development Construction Project. Science of Soil and Water Conservation, 2013, 11(1): 88-94. (in Chinese))
张平仓,周 若,程冬兵,等. 工程开挖面特征及土壤流失量快速监测方法探讨.长江科学院院报, 2013, 30(9): 22-26. (ZHANG Ping-cang, ZHOU Ruo, CHENG Dong-bing, et al. Discussion on Characteristics of Engineering Excavated Slope and Rapid Monitoring Technology for Soil Loss. Journal of Yangtze River Scientific Research Institute, 2013, 30(9): 22-26. (in Chinese))
许文盛,童晓霞,李亚龙,等. 水蚀区生产建设项目用地开挖面分类体系及其应用.中国水土保持科学, 2014, 12(1): 75-80.(XU Wen-sheng, TONG Xiao-xia, LI Ya-long, et al. Classification of Artificially Excavated Surfaces in Construction Project Lands and Its Application in Water Erosion Areas. Science of Soil and Water Conservation, 2014, 12(1): 75-80. (in Chinese))
程冬兵,张长伟,张平仓,等. 工程开挖面土壤侵蚀模型的构建.农业工程学报, 2014, 30(10): 106-112. (CHENG Dong-bing, ZHANG Chang-wei, ZHANG Ping-cang, et al. Construction of Soil Erosion Model of Engineering Excavated Slope. Transactions of the Chinese Society of Agricultural Engineering, 2014, 30(10): 106-112. (in Chinese))
赵永军. 生产建设项目水土流失防治技术综述. 中国水土保持,2007,(4):47-50.( ZHAO Yong-jun. Review of Soil and Water Conservation Technology for Construction Projects. Soil and Water Conservation of China, 2007,(4): 47-50. (in Chinese))
李 璐,袁建平,刘宝元. 开发建设项目水蚀量预测方法研究. 水土保持研究,2004,11(2):81-84. (LI Lu, YUAN Jian-ping, LIU Bao-yuan. Review on Soil Erosion Prediction in Construction Projects. Research of Soil and Water Conservation, 2004, 11(2): 81-84. (in Chinese))
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