| 库布齐沙漠机械防沙措施的防护效益 |
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| 引用本文： | 王睿,周立华,陈勇,肖建华,宗玉梅.库布齐沙漠机械防沙措施的防护效益[J].干旱区研究,2017,34(2):330-336. |
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| 作者姓名： | 王睿 周立华 陈勇 肖建华 宗玉梅 |
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| 作者单位： | 1. 中国科学院西北生态环境资源研究院,沙漠与沙漠化重点实验室,甘肃兰州730000;中国科学院大学,北京100049;2. 中国科学院西北生态环境资源研究院,沙漠与沙漠化重点实验室,甘肃兰州730000;中国科学院科技战略咨询研究院,北京100190;3. 中国科学院西北生态环境资源研究院,沙漠与沙漠化重点实验室,甘肃兰州730000 |
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| 基金项目： | 国家科技支撑计划项目，内蒙古自治区科技计划资助项目 |
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| 摘 要： | 在库布齐沙漠风沙防治试验场,开展了机械防沙措施的防护效益观测。结果表明:防风效益、阻沙效益和表土含水率等随沙障材料、规模和结构发生变化。1 1 m×1 m植物纤维网沙障和高密度聚乙烯(HDPE)网沙障风速降低比(K值)分别为58.5%和55.7%,均高于同规格的沙柳沙障的18.3%,说明同一规格下植物纤维网防风效果要优于其他材料;2 1 m×1 m植物纤维网沙障和1 m×1 m HDPE沙障的K值均小于相同材料8 m×8 m沙障的K值,说明小规格低立式沙障防风效应,低于相同材料较大规格高立式沙障;3月积沙量数据分析表明,阻沙栅栏能有效减小积沙量,而固沙沙障内积沙量受风向和局部地形影响较大;4不同材料与不同规格沙障内的表土含水率均高于对照区裸沙地,说明防沙措施对保持土壤水分也起到了一定作用。
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| 关 键 词： | 机械沙障 表土含水率 沙障材料 沙障结构 防护效益 库布齐沙漠 |
Wind-Blown Sand Control Effect of Sand Barriers Used in the Hobq Desert |
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| WANG Rui,ZHOU Li-hua,CHEN Yong,XIAO Jian-hua,ZONG Yu-mei.Wind-Blown Sand Control Effect of Sand Barriers Used in the Hobq Desert[J].Arid Zone Research,2017,34(2):330-336. |
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| Authors: | WANG Rui ZHOU Li-hua CHEN Yong XIAO Jian-hua ZONG Yu-mei |
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| Abstract: | In this study,the efficiency of wind-blown sand control measures including sand barriers was researched in the sand control test field in the Hobq Desert.The results showed that the wind reduction effect,sand blocking effect and topsoil moisture content were changed with the change of sand barrier material,size and structure.① The wind speed reduction ratios (K) of the 1 m × 1 m sand barriers made by plant fiber and high-density polyethylene (HDPE) were 58.5％ and 55.7％ respectively,they were much higher than that of the sand barriers made by Salix with the same size.These indicated that the protection effects of the sand barriers made by plant fiber were higher than those of sand barriers made by other materials;② The K values of the sand barriers made by plant fiber and HDPE with size of 1 m × 1 m were lower than those of the sand barriers made by the same materials with size of 8 m × 8 m.These revealed that,under the same material,the protection effect of the sand barrier with small size was lower than that of sand barrier with large size;③ The data of monthly sand accumulation showed that the sand fence could be used to effectively reduce the sediment amount of sand from outside,and the amount of sand accumulation within sand barriers was strongly influenced by wind direction and local terrain;④ The soil moisture content under sand barriers made by different materials and with different sizes was higher than that of bare sand,and this showed that the sand-protecting measures could not only be used to effectively reduce the windblown sand disasters,but also could be used to increase soil moisture content to a certain degree. |
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| Keywords: | sand control fence topsoil moisture content sand barrier material sand barrier structure sand-protecting efficiency Hobq Desert |
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