干旱区生态环境知识资源中心(Arid): 灾害胁迫下建平县沙棘人工林的时空特性

Arid

	灾害胁迫下建平县沙棘人工林的时空特性
其他题名	Temporal-spatial Characteristics of Hippophae rhamnoides Plantations Under Disaster Stresses In Jianping, Liaoning, China
	路常宽 1; 廖晓玉 1; 王晓勤 2; 刘艳华 3; 骆有庆 1
ISSN	1006-687X
出版年	2009
卷号	15 期号:4 页码:464-468
中文摘要	辽宁省建平县沙棘衰退主要是干旱胁迫和沙棘术蠹蛾蛀食危害复合作用的结果,本文中统称沙棘灾害.选择建平县东北部作为实验区,利用5期TM遥感图像研究沙棘林的光谱反射特征,并计算样地的归一化植被指数(NDVI),得到了沙棘植被多年变化特征.结果表明,NDVI增加表明沙棘林生长状况良好,而下降则表明在灾害胁迫下沙棘人工林出现衰退.结合地而数据,初步明确了沙棘灾害程度的NDvI临界值,以NDVI下降幅度至≤0.1为轻度受灾区,NDVI下降幅度在<0.1≤0.25为中等受灾Ⅸ,NDVI下降幅度>0.25为严重受灾区.应用RS与GIS相结合方法,对研究区的遥感影像进行人机交瓦解译,得到5期土地利用类型分布以及面积统计.结果表明,1991～2004年间沙棘面积显著减少,主要向耕地、荒地与裸地转化.本研究结果为实时动态、大面积监测沙棘人工林灾害奠定了基础.图5表2参21.
英文摘要	The degradation of seabuckthorn(Hippophae rhamnoides)plantations in Jianping County,Liaoning is mainly caused by drought and seabuckthorn carpentermoth(Holcocerus hippophaecolus).Northwest Jianping was chosen as study area to approach the feasibility of dynamic monitoring of the damage extent and temporal-spatial characteristics of seabuckthorn disaster(called by this paper).According to TM images taken in 1991,1993,1997,2001 and 2004,the spectral feature of H.rhamnnoides was analyzed.The normalized difference vegetation index(NDVI)was computed in order to detect the dynamics of degradation of H.rhamnoides.Comparisons of multi-temporal NDVI changes show that the increase in NDVI indicated the undamaged areas,whereas the decrease in NDVI indicated the damaged areas.Coupled with the ground truth data,critical values of NDVI for different damaged degrees were determined,that is,NDVI≤0.1 indicates mild damage,0.10.25 heavy damage.Combining RS with GIS,land use type distribution and area statistics were derived by interpreting the TM images on computer.It was shown that the cultivated areas of H.rhamnnoides signif icantly decreased from 1991 to 2004,and they mainly became farmland,deserted land and bare land.These findings provide a scientific basis for preventing and combating seabuckthorn disaster.Fig 5,Tab 2,Ref 21.
中文关键词	沙棘 ; 沙棘木蠹蛾 ; 灾害 ; 遥感 ; 时空特性
英文关键词	Hippophae rhamnoides Holcocerus hippophaecolus disaster remote sensing temporal-spatial characteristics
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:3679821
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224430
作者单位	1.北京林业大学, 森林培育与保护教育部重点实验室, 北京 100083, 中国; 2.河北科技师范学院, 秦皇岛, 河北 066600, 中国; 3.燕山大学,信息科学与工程学院, 秦皇岛, 河北 066004, 中国
推荐引用方式 GB/T 7714	路常宽,廖晓玉,王晓勤,等. 灾害胁迫下建平县沙棘人工林的时空特性[J]. 北京林业大学,2009,15(4):464-468.
APA	路常宽,廖晓玉,王晓勤,刘艳华,&骆有庆.(2009).灾害胁迫下建平县沙棘人工林的时空特性.,15(4),464-468.
MLA	路常宽,et al."灾害胁迫下建平县沙棘人工林的时空特性".15.4(2009):464-468.