Experimental Study on Surface Runoff and Sediment Yield Characteristics Under Different Slope Protection Modes of a Typical Dike in Poyang Lake District

XIAO Shengsheng; HU Zhijian; ZHANG Jisong; TANG Chongjun; YANG Jie

doi:10.13961/j.cnki.stbctb.2019.02.002

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Experimental Study on Surface Runoff and Sediment Yield Characteristics Under Different Slope Protection Modes of a Typical Dike in Poyang Lake District

- Experimental Study on Surface Runoff and Sediment Yield Characteristics Under Different Slope Protection Modes of a Typical Dike in Poyang Lake District
- Bulletin of Soiland Water Conservation Vol. 39, Issue 2, Pages: 10-15(2019)
- 作者机构：
  
  1. 江西省土壤侵蚀与防治重点实验室,江西,南昌,330029
  2. 江西省水土保持科学研究院,江西,南昌,330029
  3. 江西省峡江水利枢纽工程管理局,江西,南昌,330046
  4. 江西省河道湖泊管理局,江西,南昌,330009
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2019.02.002
  CLC： S157.1
- Published：2019
- 稿件说明：
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XIAO Shengsheng, HU Zhijian, ZHANG Jisong, et al. Experimental Study on Surface Runoff and Sediment Yield Characteristics Under Different Slope Protection Modes of a Typical Dike in Poyang Lake District[J]. Bulletin of Soiland Water Conservation, 2019, 39(2): 10-15.
DOI：

XIAO Shengsheng, HU Zhijian, ZHANG Jisong, et al. Experimental Study on Surface Runoff and Sediment Yield Characteristics Under Different Slope Protection Modes of a Typical Dike in Poyang Lake District[J]. Bulletin of Soiland Water Conservation, 2019, 39(2): 10-15. DOI： 10.13961/j.cnki.stbctb.2019.02.002.

摘要

[目的]对鄱阳湖区典型堤防不同植草护坡产流产沙特征进行试验研究，为该区植草护坡草种筛选以及护坡技术构建提供一定的科学依据。[方法]采用人工模拟降雨的手段，利用水土流失移动监测车选取鄱阳湖区典型堤防——九江市永修县九合联圩为研究对象，对裸露坡面（BL）、自然恢复坡面（NRS）、狗牙根护坡坡面（CDS）、中华结缕草护坡坡面（ZSS）和假俭草护坡坡面（EOS）等5种护坡模式进行了水土流失监测，量化不同护坡模式的水土保持效益。[结果]裸地具有最短的初始产流时间和最大的径流流速，植草后能较大幅度延长初始产流时间，降低径流流速，并且假俭草坡面减缓坡面流速的效果最为明显。20 mm/h雨强下，4种植草坡面与裸露坡面之间的径流系数没有明显差异，但是随着雨强的增大，植草坡面对径流的抑制作用就越来越明显。各处理土壤流失量均随着雨强增大而增大。[结论]植草护坡能有效减少堤防土壤流失量，并且堤防植草护坡的减沙效益在大雨强下表现得更为明显。

Abstract

[Objective] Runoff and sediment yield characteristics of different grass-planting slope protection in typical dikes of Poyang Lake were studied in order to provide a scientific basis for the selection of grass species and the guiding of dike slope protection.[Methods] Responses of soil and water loss characteristics to different rainfall intensities were studied using rainfall simulation under 5 dike slope types

which are bare land(BL)

natural restoration slope(NRS)

Cynodon dactylon sowing in drill slope(CDS)

Zoysia sinca sowing in drill slope(ZSS)

Eremochloa ophiuroides and-stem planting slope(EOS)

in Jiuhe Dike of Yongxiu County

a typical dike of Poyang Lake.[Results] As compared with BL

other four slope protection models played positive effect in prolonging initial runoff times and reducing flow velocities

and there was the lowest flow velocity under EOS treatment. There were no significant difference of runoff coefficient between BL and other four slopes under 20 mm/h rainfall intensity

but with the increase of the rainfall intensity

the inhibition of vegetation protection to surface runoff were becoming more and more obvious. Sediment yields increased with the increase of rainfall intensity under 5 treatments.[Conclusion] Compared with BL

vegetation protection slopes could effectively reduce dike sediment loss

especially under high rainfall intensity.

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