不同植物配置模式对人工边坡减流减沙效益的影响
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S157.1,S157.2

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江西省科技厅重点研发计划项目“江西红壤区工程堆积体水土保持植被优化配置研究”(2016BBG70086);江西省水利厅科技项目(202123YBKT13,202123BZKT02);江西省水利科学院江西省土壤侵蚀与防治重点实验室开放基金项目(KFJJ201804,KFJJ202004)


Effects of Different Plant Configuration Patterns on Flow and Sediment Reduction of Artificial Slope
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    摘要:

    [目的] 探讨不同植物模式(混草、花草、灌草、乔草)及配置比例对生产建设项目人工边坡水土流失的影响,为人工边坡植被恢复提供参考。[方法] 采用径流小区定位观测法,记录2019年1—12月自然降雨,研究4种植物模式的产流产沙特点,揭示4种植物模式的减流减沙效益。[结果] ①观测期内总降雨量为1 052.73 mm,总降雨历时为845.1 h,7月降雨量最大,2月降雨历时最长,降雨集中在1—7月,以中雨、大雨、暴雨为主。②每场降雨产流差异大,产流月季差异大,集中在2—4月及7月,多发生在中雨、大雨和暴雨情况。③每场降雨及月、季降雨之间产沙差异大,3月产沙最大,产沙集中在2—4月及7月,多发生中雨、大雨和暴雨。④以花草模式为对照,每场降雨条件下灌草模式的减流率最大,乔草模式的减沙率最大,月降雨累计条件下,混草模式减流率最大,乔草模式减沙率最大,不同降雨等级累积和全年累积条件下,乔草模式的减流减沙率最大。[结论] 植被恢复初期,受植被覆盖度差异影响,乔草模式、混草模式的减流减沙率较大,具有较好的固土保持效益。

    Abstract:

    [Objective] The impacts of different plant patterns and configuration proportions on soil and water loss of an artificial slope were analyzed in order to provide reference for artificial slope vegetation restoration.[Methods] Natural rainfall from January to December 2019 was measured and the runoff and sediment yield characteristics for runoff plots was simulated using four different vegetation patterns to determine the runoff and sediment reduction benefits of different vegetation patterns.[Results] ① Total rainfall during the observation period was 1 053 mm, and total rainfall duration was 845.1 hours. Rainfall in July was the largest, and rainfall in February had the longest duration. Rainfall was concentrated in January to July, and classified mainly as moderate rain, heavy rain, and rainstorm. ② The variation in runoff yield per rainfall was large, and the variation in monthly and seasonal runoff yield was also large, mainly occurring in February-April and July, in events classified as moderate, heavy rain, and rainstorm. ③ The sediment yield of field rainfall, monthly rainfall and seasonal rainfall was very different. Sediment yield in March was the highest, and the sediment yield was concentrated in February-April and July, with frequent occurrences of moderate rain, heavy rain, and rainstorm events. ④ Compared with the flower-grass pattern, the shrub-grass pattern had the largest runoff reduction and the tree-grass pattern had the largest sediment reduction rate under each rainfall type. The tree-grass pattern had the largest sediment reduction rate, and the herb pattern had the largest runoff reduction rate under the monthly rainfall accumulation. The tree-grass pattern had the largest runoff and sediment reduction rate under the condition of accumulation of different rainfall classes and annual accumulation.[Conclusion] In the early stage of vegetation restoration, affected by the difference in vegetation coverage, the tree-grass pattern and the herb pattern had a higher rate of flow reduction and sediment reduction, and had better soil conservation benefits.

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昝玉亭,奚同行,吴治玲,张华明,龚长春,熊峰,李英.不同植物配置模式对人工边坡减流减沙效益的影响[J].水土保持通报,2022,42(3):1-7,22

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  • 收稿日期:2021-10-21
  • 最后修改日期:2022-01-12
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  • 在线发布日期: 2022-08-02
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