Effects of vegetation buffer strips on concentrated flow hydraulics and gully bed erosion based on in situ scouring experiments
文献类型： 外文期刊
第一作者： Dong, Yifan
作者： Dong, Yifan;Xiong, Donghong;Su, Zheng'an;Yang, Dan;Zheng, Xueyong;Shi, Liangtao;Dong, Yifan;Poesen, Jean
作者机构：
关键词： braid index; deposition; gully erosion; split flow effects; vegetation buffer strips
期刊名称：LAND DEGRADATION & DEVELOPMENT （ 影响因子：4.977； 五年影响因子：5.291 ）
ISSN： 1085-3278
年卷期： 2018 年 29 卷 6 期
页码：
收录情况： SCI
摘要： Vegetation on gully beds could intercept runoff, reduce incision of gully bed, and trap sediment from upstream area. The aim of this study is to evaluate the influences of vegetation buffer strips on concentrated flow hydraulics and gully bed erosion downstream of gully headcuts. Five gully head plots containing different buffer strip widths with similar vegetation density were constructed for in situ scouring experiments. Each plot received 11 tests with 2 discharges (i.e., 7 tests simulating 83.3 L min(-1) and 4 tests simulating 166.7 L min(-1)). Buffer strips clearly decrease flow hydraulics (about 56-70%) and increase flow resistance (1.2 to 1.5 times) according to the selected hydraulic parameters. After 11 tests, total net erosion volume (NEV) and average sediment concentration from each gully bed showed an exponential decreasing relationship with increasing widths of buffer strips. All the selected hydraulic parameters showed a strong correlation with total NEV from the bare soil sections (0.43 < R-2 < .61 with significance level reaching .01), whereas the relationship was very weak in the buffer strips. The gross deposition volume in buffer strips showed a linear correlation with upstream NEV (NEVu) and flow velocity (R-2 = .91, p < .001). Split flow effects expressed by braid index increased with increasing widths of buffer strips and scouring times. Both bare and vegetated sections suffered from erosion clearly, but the average NEV from buffer strips was about 30.2% of bare soil sections. This indicated the buffer strip effects on reducing erosion were more significant than trapping sediments were in this study.
分类号：
- 相关文献
作者其他论文 更多>>
-
Temperature sensitivity of soil-borne fungal phytopathogens depends on niche breadth and land use types
作者：Yan, Bangguo;Sun, Yi;He, Guangxiong;Li, Lin;Yue, Xuewen;Shi, Liangtao;Fang, Haidong;Yan, Bangguo;Sun, Yi;He, Guangxiong;Li, Lin;Yue, Xuewen;Shi, Liangtao;Fang, Haidong;He, Guangxiong;Wang, Xuemei
关键词：Plant pathogens; Diversity; Climate warming; Specialist; Climate niche
-
Study on erosion deformation of dry-red soil in Yuanmou dry-hot valley with different elevation gradients based on SBAS-InSAR technology
作者：Guo, Junqi;Xi, Wenfei;He, Guangxiong;Yang, Zhengrong;Ding, Zitian;Wang, Lixia;Cao, Ruihan;Xi, Wenfei;He, Guangxiong;Huang, Guangcai;He, Guangxiong;Shi, Liangtao;He, Guangxiong;Shi, Liangtao;He, Guangxiong;Shi, Liangtao
关键词：soil erosion; SBAS-InSAR; fractional vegetation cover; Yuanmou dry-hot valley; dry-red soil
-
A phase-separated protein hub modulates resistance to Fusarium head blight in wheat
作者：He, Yi;Wang, Yuhua;Dong, Yifan;Zhang, Zhengguang;Li, Gang;He, Yi;Wu, Lei;Jiang, Peng;Zhang, Xu;Yang, Xiujuan;Tucker, Matthew R.;Xia, Xiaobo;Jiang, Cong;Ma, Hongxiang;Ma, Wujun;Liu, Cong;Whitford, Ryan
关键词：
-
Integrated metabolic phenotypes and gene expression profiles reveal enzymatic browning mechanism in postharvest chrysanthemum
作者：Yang, Dan;Zhu, Yuyun;Feng, Weihong;Chen, Sha;Zhang, Yongxin;Kang, Chen;Zhu, Jingjing;Liu, Shanshan;Wang, Wei;Zhang, Mei;Cai, Zhongqi;Wei, Shouhui
关键词：Chrysanthemum morifolium; Enzymatic browning; Molecular mechanism; Metabolomics; Browning product; Transcriptomics
-
Combination of S1-N-Terminal and S1-C-Terminal Domain Antigens Targeting Double Receptor-Binding Domains Bolsters Protective Immunity of a Nanoparticle Vaccine against Porcine Epidemic Diarrhea Virus
作者：Yang, Dan;Su, Mingjun;Guo, Donghua;Zhao, Feiyu;Wang, Meijiao;Liu, Jiaying;Zhou, Jingxuan;Sun, Ying;Yang, Xu;Qi, Shanshan;Li, Zhen;Zhu, Qinghe;Xing, Xiaoxu;Li, Chunqiu;Cao, Yang;Sun, Dongbo;Feng, Li
关键词：coronavirus; PEDV; nanoparticle vaccine; double receptor-binding domains; protective immunity
-
Climate and soil stressed elevation patterns of plant species to determine the aboveground biomass distributions in a valley-type Savanna
作者：He, Guangxiong;Shi, Zhengtao;Liang, Qiaoling;Zhao, Lei;Jiang, Qin;He, Guangxiong;Fang, Haidong;Shi, Liangtao;Wang, Yandan;Yang, Haozhou;Yan, Bangguo;Yu, Jianlin;He, Guangxiong;Fang, Haidong;Shi, Liangtao;Wang, Yandan;Yang, Haozhou;Yan, Bangguo;Yu, Jianlin;He, Guangxiong;Fang, Haidong;Shi, Liangtao;Wang, Yandan;Yang, Haozhou;Yan, Bangguo;Yu, Jianlin;Yang, Chaolei
关键词：species diversity; aboveground biomass; valley-type Savanna; RDA; environmental variables and factors
-
A survey of fecal virome and bacterial community of the diarrhea-affected cattle in northeast China reveals novel disease-associated ecological risk factors
作者：Zhu, Qinghe;Qi, Shanshan;Guo, Donghua;Li, Chunqiu;Su, Mingjun;Wang, Jianfa;Li, Zijian;Yang, Dan;Sun, Haibo;Wang, Xiaoran;Wang, Meijiao;Wu, Haoyang;Yu, Shiping;Bai, Wenfei;Zhang, Yongchen;Yang, Xu;Jiang, Limin;Liu, Jiaying;Zhao, Yingying;Xing, Xiaoxu;Sun, Dongbo;Shi, Da;Feng, Li
关键词：cattle; diarrhea; disease ecology; virome; bacterial community
