新疆托克逊县不同配置防护林的防风蚀效能
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S157;S727.2

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国家博士后基金项目“吐鲁番城郊工业区人工防护林对土壤重金属及防风蚀机理研究”(2020T130554);国家自然科学基金项目“绿洲城市路侧树种不同器官对降尘和土壤重金属的富集及转运机理研究”(31971713)


Wind Erosion Effects of Different Shelterbelts in Toksun County, Xinjiang Wei Autonomous Region
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    摘要:

    [目的] 对比分析不同配置防护林迎风林缘与背风林缘的防风蚀效能,为干旱区绿洲城市防护林建设、防沙治沙以及生态环境改善工作提供理论依据。[方法] 以新疆托克逊县城郊区不同配置防护林为研究对象,通过观测近地表风速、起沙风速、近地表粗糙度、输沙量、风沙流结构等指标,对比研究混交林1(胡杨68%+柽柳32%)、混交林2(柽柳65%+胡杨35%)、梭梭林迎背风林缘的防风蚀效能。[结果] 不同配置防护林的地表粗糙度、起沙风速、风速廓线、防风阻沙效能都有差异。不同配置防护林地面粗糙度从高到底依次为:混交林2(0.569 cm)>混交林1(0.378 cm)>梭梭林(0.123 cm)。起沙风速从高到低依次为:混交林2(6.17 m/s)>梭梭林(6.02 m/s)>混交林1(5.98 m/s)。防风效能从强到弱依次为:混交林2>混交林1>梭梭林。阻沙效能依次为:梭梭林(48.2%)>混交林2(45.6%)>混交林1(37.1%),各林地0—10 cm,10—20 cm垂直高度上的集沙量所占比例较高。[结论] 混交林2有效降低不同垂直高度的风速及输沙量,混交林2的防风蚀效能较高。

    Abstract:

    [Objective] The wind erosion control efficiency of windward and leeward edges of different shelterbelts was compared and analyzed, in order to provide theoretical basis for urban shelterbelt construction, sand control and ecological environment improvement in arid oasis.[Methods] Taking different shelterbelts in the suburbs of Tuokexun County, Xinjiang Wei Autonomous Region as the research area, by observing the near surface wind speed, sand driving wind speed, near surface roughness, sediment discharge, and structure of wind sand flow, a comparative study was conducted on the wind erosion control efficiency of windward and leeward edges of mixed forest 1(68% Populus euphratica + 32% Tamarix chinensis), mixed forest 2(65% Tamarix chinensis + 35% Populus euphratica) and Haloxylon ammodendron forest.[Results] The surface roughness, sand driving wind speed, wind speed profile and wind resistance efficiency of different shelterbelts were different. The roughness of different forest areas were in the decending order as:mixed forest 2(0.569 cm) > mixed forest 1 (0.378 cm) > Haloxylon ammodendron forest 0.123 cm. The sand-blowing wind speed from high to low was as:mixed forest 2 (6.17 m/s) > Haloxylon ammodendron forest (6.02 m/s) > mixed forest 1 (5.98 m/s). The effects of wind erasion control were in the decending order as:mixed forest 2 > mixed forest 1 > Haloxylon ammodendron forest. The sand-blocking efficiency was as:Haloxylon ammodendron forest (48.2%) > mixed forest 2(45.6%) > mixed forest 1(37.1%), the sand-collecting capacity of 0-10 cm and 10-20 cm vertical height was higher.[Conclusion] The mixed forest 2 could effectively reduce the wind speed and sediment transport at different vertical heights, and the mixed forest 2 had higher wind erosion control efficiency.

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若山古丽·芒力克,阿丽亚·拜都热拉,蔡凯旭,木合塔尔·扎热,宋敏.新疆托克逊县不同配置防护林的防风蚀效能[J].水土保持通报,2021,41(6):43-47,56

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  • 收稿日期:2021-06-25
  • 最后修改日期:2021-08-15
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  • 在线发布日期: 2022-01-06
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