湿地生态系统状态参数遥感估算与分析  

Estimation and analysis of wetland ecosystem state parameters via remote sensing technique

作　　者：姚为[1] 韩敏[1] 

机构地区：[1]大连理工大学电子与信息工程学院,辽宁大连116024

出　　处：《大连理工大学学报》2011年第3期422-427,共6页Journal of Dalian University of Technology

基　　金："十一五"国家科技支撑计划资助项目(2006BAB14B05);"九七三"国家重点基础研究发展计划资助项目(2006CB403405);国家自然科学基金资助项目(60674073)

摘　　要：综合利用遥感图像处理技术和定量遥感模型,计算分析了扎龙湿地不同时期的植被指数和蒸散发量信息,研究了2001年火灾前后湿地植被生长状况的时间变化和空间差别.实验通过计算蒸腾量与植被指数的比值,来描述地面植被在不同生长阶段生长速度的差别,并利用图像变化检测技术,获取了火灾受灾区空间分布情况的相关信息.实验结果表明,在火灾中湿地生态系统受到大面积破坏,受灾最严重的是芦苇生长区;湿地植被规模锐减,而未被烧毁植被的生长速度则没有受到直接影响;由于补水措施的及时,整个生态系统在灾后总体恢复情况理想.Using quantitative remote sensing and image processing techniques,a comprehensive analysis upon information about regional vegetation index and evapotranspiration of Zhalong wetland was achieved,and the temporal change and spatial variation of vegetation conditions in Zhalong wetland before and after the fire in 2001 were studied.In the course of the experiments,ratios of transpiration and vegetation index were calculated as a description for the changes of growth rate of wetland vegetations.Then,image change detection was applied to obtaining information about spatial distribution of the fire damage.Experimental results show that the Zhalong wetland ecosystem is badly damaged by the disaster and those reed marsh regions suffer the most;the growth pattern of wetland reeds has not been affected significantly though the amount is sharply reduced.Fortunately,due to the prompt water supplement measures,post-disaster restoration for the whole wetland region is satisfactory.

关 键 词：湿地 生态环境 植被指数 蒸散发量 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]