| 不同类型农田地表粉尘起动摩阻风速的野外观测 |
| |
| 引用本文： | 王颖钊,张承中,高建华,刘初全,栗志艳.不同类型农田地表粉尘起动摩阻风速的野外观测[J].安徽农业科学,2009(2):710-711. |
| |
| 作者姓名： | 王颖钊 张承中 高建华 刘初全 栗志艳 |
| |
| 作者单位： | 西安建筑科技大学环境与市政工程学院,陕西西安,710055 |
| |
| 基金项目： | 陕西省自然科学基金，陕西省教育厅专项基金 |
| |
| 摘 要： | 目的]为北方城市空气污染控制提供依据。方法]选择不同地表类型，观测起尘差异，分析表土微团粒粒度，计算起动摩阻风速。结果]沙化农田的光滑地表空气动力学粗糙度（Z0s）为0．0012cm，小麦地为0．0021cm，果树苗地的为0．0025cm。有植被覆盖的地表粉尘起动摩阻风速明显高于裸露地表，且随着植被高度增加而增大。延安果树苗地地表起动摩阻风速达到了139：15cm／s。裸露小麦地和果树苗地地表粉尘起动摩阻风速大于裸露沙化农田（7．39cm／s）。小麦返青期、成熟期、收割后地表粉尘起动摩阻风速分别为46．85、98．93、29．05cm／s，裸露地表和幼苗期果树苗地地表粉尘起动摩阻风速分别为26．01和139．15cm／s。结论]植被高度和土壤结构性质是影响地表粉尘起动摩阻风速的重要因素。
|
| 关 键 词： | 农田 粉尘 起动摩阻风速 |
Field Observation of Dust Threshold Friction Velocity on Different Types on Farmland Surfaces |
| |
| WANG Ying-zhao et al.Field Observation of Dust Threshold Friction Velocity on Different Types on Farmland Surfaces[J].Journal of Anhui Agricultural Sciences,2009(2):710-711. |
| |
| Authors: | WANG Ying-zhao |
| |
| Institution: | WANG Ying-zhao et al(School of Environmental , Municipal Engineering,Xian University of Architecture , Technology,Xian,Shaanxi 710055) |
| |
| Abstract: | Objective] The study was to provide the basis to control the air pollution in northern city.Method] Different types of land surfaces were collected to observe the difference of dust explosure.The size of micro-aggregates in surface soil was analyzed and threshold friction velocity was calculated.Result] The smooth surface aerodynamic roughness of desertification farmland(Z0s) was 0.001 2 cm,that of wheat land was 0.002 1 cm and that of fruit seedling land was 0.002 5 cm.The dust threshold friction veloci... |
| |
| Keywords: | Farmland Dust Threshold friction velocity |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
