GIS技术在区域土壤退化敏感性评价中的应用
Journal Title: Science Paper Online - Year 2008, Vol 3, Issue 5
Abstract
在生态环境较脆弱的吉林省西部地区，应用GIS多边形叠置分析技术划分了6 395个评价单元，选取了6项土壤退化敏感性指标，将土壤退化的敏感程度分为非敏感、轻度敏感、中度敏感和极敏感四级，采用层次分析和二级模糊综合评判相结合的方法进行敏感性评价，并通过GIS技术实现评价结果的分区和可视化。结果表明，本文所采用的评价方法能够有效提高评价精度，吉林西部土壤退化以轻度敏感为主，中度敏感和极敏感次之，非敏感地区占土地总面积的份额最小。
Authors and Affiliations
Fengqin ZHAO, Jie TANG , Zhongshu WANG
Keywords
Related Articles
- EP ID EP139307
- DOI -
- Views 89
- Downloads 0
Experimental study on viscosity properties of molten Zr50Cu50 alloy by rotating cylinder method
The dynamic viscosity of molten Zr50Cu50 alloy was measured by using rotating cylinder method and its variation with temperature was explored. The experimental results showed that viscosity of the molten alloy increases...
Synthesis, characterization and photocatalytic properties of nanocrystalline CuAl2O4
Spinel-type CuAl2O4 nanocrystalline was prepared by organic precursor method in this paper. The precursor and CuAl2O4 powder was characterized by TG-DTA, XRD, TEM, UV-VIS, etc. The result suggested that an intermediate-p...
两步升温法酸催化潲水油制备生物柴油
回收的潲水油经适当的预处理后，采用两步升温法在浓硫酸催化作用下与甲醇进行酯交换反应制备生物柴油。考察了重要因素对反应的影响，得出了利用潲水油制备生物柴油的最佳条件：催化剂体积为潲水油体积的5%，醇油摩尔比为20:1，反应时间为...
Experimental and theoretical study on a new semi-active control system
This paper presents a new semi-active control system, namely, active variable stiffness • damping (AVS•D) system. Parameters of the AVS•D device are optimized to maximally amplify deformation of dampers. A predictive opt...
一种用于产品在线探伤的图像检测装置
该系统通过CMOS图像传感器采集产品的图像信息并转化成数字信号传输到存储器中，由ARM处理器进行图像处理和分析，判断产品是否合格，然后自动剔除不合格的产品。同时，还可以统计每天的检测结果，上传到上位机。系统使用以ARM7TDMI为核心...