| 多因素耦合作用下黄土植被坡面水沙养分流失模拟 |
| 高爽1,2; 吴磊1,2,3; 迟宇博1,2; 李蕊1,2
|
| 2020
|
发表期刊 | 水土保持学报
|
卷号 | 34期号:4页码:104-111 |
摘要 | 采用人工模拟降雨试验研究不同雨强( 60 ,
90 , 120mm / h )、不同坡度( 10° , 15° , 20° )、不同生物炭含量
( 0 ,
3% , 6% )等多因素耦合作用下黄土植被坡面水沙及养分流失规律。结果表明:( 1 )水沙及 PO 4 3- — P
的流失随着雨强的增大而增大, NO 3 - — N随雨强的增大呈先上升后下降的趋势,径流及氮磷与坡度的规
律性不明显,雨强坡度与 k 值(产沙速率系数)变化率的线性关系中,雨强的影响较大。( 2 )产流产沙过程
相似,均随降雨历时先上升后趋于平稳, NO 3 - — N 与降雨历时呈幂函数关系,
PO 4 3- — P 在流失过程中最
大浓度与最小浓度比为1~2 ,且在侵蚀产沙及 NO 3
- — N 的流失过程中,雨强与生物炭相关性极显著。
( 3 )生物炭含量 ≥3%会增加侵蚀产沙及 PO 4 3- — P的流失,雨强为60 , 90mm /
h时,
NO 3 - — N 流失量随
生物炭的增多呈先减小后增大的趋势,雨强为 120mm / h 时, NO 3 - — N 流失量随生物炭添加量的增大呈
上升趋势。研究结果可以为黄土丘陵沟壑区水土资源管理提供科学的指导。 |
其他摘要 | The simulated rainfall experiments were conducted to explore the loss rules of runoff , sediment ,
and nutrient on the loess vegetated sloping land under the coupling
effects of different rainfall intensity ( 60
mm / h , 90mm / h , 120 mm / h ), slope ( 10° , 15° , 20° ), and biochar content ( 0 , 3% , 6% ) .The results
showed that :( 1 ) The loss of runoff , sediment , and PO 4
3- — P increases with the increase of rainfall intensity ,
and NO 3 - — N increases firstly and then decreases with the increase of rainfall intensity.The rules of runoff ,
nitrogen , and phosphorus with slope were not obvious.The influence of rainfall intensity was greater in the
linear relationship between the rainfall intensity ,
slope , and the changing rate of k value ( sediment yield rate
coefficient ) . ( 2 ) The processes of runoff and sediment yield were similar ,
they
both first rose and then
stabilized with the progress of rainfall.The NO 3 - — N had a power function relationship with the rainfall duration.
The ratio of the maximum concentration to the minimum concentration of PO 4
3- — P during
loss was between 1and
2.In the process of sediment yield and NO 3 - — N loss , the correlation between rainfall intensity and biochar was
extremely significant. (
3 ) The increase of biochar content ( ≥3% ) could increase the sediment yield and loss of
PO 4
3- — P.When the rainfall intensity
was 60mm / h and 90mm / h , the amount of NO 3 - — N loss decreased firstly
and then increased with the increase of biochar content.When the rainfall intensity was 120 mm / h , the
amount of NO 3 - — N loss depended on the amount of added biochar.The results can provide scientific
guidance for the management of soil and water resources in the loess hilly and gully region. |
关键词 | 黄土坡面
雨强
坡度
生物炭
土壤养分
|
收录类别 | 中文核心期刊要目总览
|
语种 | 中文
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文献类型 | 期刊论文
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条目标识符 | sbir.nwafu.edu.cn/handle/361005/9921
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专题 | 水保所知识产出(1956---)
|
作者单位 | 1.西北农林科技大学旱区农业水土工程教育部重点实验室 2.西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室 3.西北农林科技大学水利与建筑工程学院
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推荐引用方式 GB/T 7714 |
高爽,吴磊,迟宇博,等. 多因素耦合作用下黄土植被坡面水沙养分流失模拟[J]. 水土保持学报,2020,34(4):104-111.
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APA |
高爽,吴磊,迟宇博,&李蕊.(2020).多因素耦合作用下黄土植被坡面水沙养分流失模拟.水土保持学报,34(4),104-111.
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MLA |
高爽,et al."多因素耦合作用下黄土植被坡面水沙养分流失模拟".水土保持学报 34.4(2020):104-111.
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文件名:
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多因素耦合作用下黄土植被坡面水沙养分流失模拟_高爽.pdf
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格式:
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Adobe PDF
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