1. 西北农林科技大学水土保持研究所, 陕西 杨凌,712100
2. 国家管网西部管道公司,乌鲁木齐,830011
3. 黄河水文水资源科学研究院,郑州,450004
4. 中国科学院水利部水土保持研究所, 陕西 杨凌,712100
5. 中兵勘察设计研究院有限公司,北京,100000
[ "杨树云(1996—),女,硕士研究生,主要从事工程建设区土壤侵蚀与水土保持研究。E-mail:ysynwafu@163.com" ]
纸质出版:2022
移动端阅览
杨树云, 张铁钢, 张展, 等. 工程堆积体坡面不同植被格局的控蚀效果研究[J]. 水土保持学报, 2022,36(4):121-127.
YANG Shuyun, ZHANG Tiegang, ZHANG Zhan, et al. Study on Erosion Control Effect of Different Vegetation Patterns on Slope Surface of Engineering Accumulation[J]. 2022, 36(4): 121-127.
杨树云, 张铁钢, 张展, 等. 工程堆积体坡面不同植被格局的控蚀效果研究[J]. 水土保持学报, 2022,36(4):121-127. DOI: 10.13870/j.cnki.stbcxb.2022.04.016.
YANG Shuyun, ZHANG Tiegang, ZHANG Zhan, et al. Study on Erosion Control Effect of Different Vegetation Patterns on Slope Surface of Engineering Accumulation[J]. 2022, 36(4): 121-127. DOI: 10.13870/j.cnki.stbcxb.2022.04.016.
为探明不同植被格局对工程堆积体陡坡坡面土壤侵蚀的影响,采用10,20,30 L/min 3种放水流量,对黄土区不同格局(裸坡、坡顶、坡中、坡底、条带)下的高陡边坡(32°,20 m×1 m)进行模拟放水试验,选取径流率、产沙率、减流效益、减沙效益等因子对堆积体坡面植被的控蚀效果进行分析。结果表明:3种放水流量下,条带、坡顶、坡中、坡底的平均径流率较裸坡分别减小57.33%,61.17%,41.62%,24.78%,平均产沙率较裸坡分别减小74.99%,61.10%,55.01%,46.43%,且径流率与产沙率的线性关系(R2=0.57~0.80,p<0.01)整体上弱于裸坡(R2=0.71,p<0.01)。不同植被格局中,条带及坡顶格局的减流效益分别是65.97%,60.52%,减沙效益分别为71.44%,57.22%,二者的控蚀效果远高于其他格局。产沙率与径流功率的线性相关性(R2=0.61~0.83,p<0.01)高于径流剪切力(R2=0.29~0.76,p<0.01),径流功率能更好地反映堆积体坡面土壤侵蚀机制。
In order to explore the soil erosion control effect of different vegetation patterns on the slope surface of engineering accumulation
the high and steep slopes (32°
20 m×1 m) with different patterns (bare slope
top slope
middle slope
bottom slope and strip slope) in the loess region were simulated with three water discharge rates of 10
20 and 30 L/min. The runoff rate
sediment yield rate
flow and sediment reduction benefit were selected to analyze the erosion control effect of vegetation patterns on the slopes of engineering accumulation. The results showed that the average runoff rates of strip
slope top
slope middle and slope bottom were 57.33%
61.17%
41.62%
24.78% lower than that of bare slope
and the average sediment yield rates were 74.99%
61.10%
55.01%
46.43% lower than that of bare slope. The linear relationship between runoff rate and sediment yield rate (R2 was 0.57 to 0.80
p<0.01) was weaker than that of bare slope (R2=0.71
p<0.01). In different vegetation patterns
the flow reduction benefits of strip pattern and slope top pattern were 65.97% and 60.52%
respectively
and the sediment reduction benefits were 71.44% and 57.22%
respectively. The erosion control effects of strip pattern and slope top pattern were much higher than other patterns. The linear correlation between sediment yield and runoff power (R2 was 0.61 to 0.83
p<0.01) was higher than that of runoff shear force (R2 was 0.29 to 0.76
p<0.01). Runoff power could better reflect the mechanism of soil erosion on the slope of accumulation.
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