干旱区研究

干旱区研究 ›› 2015, Vol. 32 ›› Issue (2): 347-353.doi: 10.13866/j.azr.2015.02.20

• 生态与环境 • 上一篇    下一篇

两条尼龙阻沙网不同组合间距的积沙量对比分析

康向光1,2, 李生宇1, 马学喜1,2, 王海峰1, 雷加强1, 王世杰1,2   

  1. 1.中国科学院新疆生态与地理研究所,新疆 乌鲁木齐 830011;
    2.中国科学院大学,北京 100049
  • 收稿日期:2013-07-19 修回日期:2013-08-14 出版日期:2015-03-15 发布日期:2015-04-16
  • 作者简介:康向光(1987-),男,硕士生,主要从事风沙地貌和荒漠化防治研究. E-mail: kxg6795656@163.com
  • 基金资助:
    新疆维吾尔自治区科技支疆项目(201291106);国家自然科学基金(41201016)

Sand Masses Blocked by Double Nylon Mesh Sand Barriers with Different Intervals

KANG Xiang-guang1,2, LI Sheng-yu1, MA Xue-xi1,2, WANG Hai-feng1, LEI Jia-qiang1, WANG Shi-jie1,2   

  1. 1. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2013-07-19 Revised:2013-08-14 Published:2015-03-15 Online:2015-04-16

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摘要： 在塔克拉玛干沙漠腹地垄间平沙地布设了两条尼龙阻沙网4种水平组合间距(2H、5H、10H、15H,H为阻沙网间距)的防沙实验,分析两条尼龙阻沙网的积沙量大小和空间分布,及其与阻沙网组合间距的关系。实验结果表明:① 阻沙网积沙量与组合间距呈弱线性负相关,其中2H和5H积沙量最大,但两者差异不大,10H最小,15H居中,与常规认识不同。② 不同组合模式的积沙量空间分配格局也明显不同,2H主要堆积在下风侧,而5H、10H、15H则均位于网间和下风侧,上风侧和下风侧积沙量与组合间距呈线性负相关,而网间积沙量与组合间距呈线性正相关。③ 两条尼龙阻沙网积沙量及其空间分布差异主要与特殊的近地表流场结构有关,但其分异机制还需要深入研究。

关键词: 积沙量, 组合间距, 尼龙阻沙网, 塔克拉玛干沙漠

Abstract: This study analyzed the deposited sand masses and their spatial distributions in two nylon mesh sand barriers with four different horizontal spaces of 2H、5H、10H and 15H (H represents the distance between two nylon meshes). A sand-control experiment was set up in an inter-dune flat sand sheet in the central Taklimakan Desert. The results showed that there was a weak and negative linear correlation between the deposited sand mass and the distance between two nylon meshes. The meshes of 2H and 5H blocked the largest amount of sand masses while the meshes of 10H blocked the smallest amount of the sand masses. The meshes of 15H blocked the media amount of the sand masses. The results of the experiment were different with what were believed in general. The spatial distribution patterns of the deposited sand masses were obviously varied with the distances between the meshes. The sand masses were mainly deposited at the downwind position in the 2H meshes while the sand masses were blocked in between the meshes and at the downwind positions in 5H, 10H and 15H meshes. The amount of blocked sand masses at the windward side and at the downwind position had negative correlations with the distances between the meshes. However, the blocked sand masses in between the two meshes had positive correlations with the distances between the nylon meshes. The near-surface flow structure affected the amount and the spatial distributions of the sand masses blocked by the nylon meshes but the mechanism of the differentiation was needed to be explored further in the future.

Key words: deposited sand mass, intervals of combinated models, nylon mesh san barrier, Taklimakan Desert