福建长汀河田盆地林下水土流失区的遥感判别  

Discrimination of Understory Soil Erosion Based on Remote Sensing Technique in Hetian Basinal Area of County Changting,Fujian Province

作　　者：张博博[1,2,3] 徐涵秋[1,2,3] 胡秀娟[1,2,3] 付伟[1,2,3] 林中立 ZHANG Bobo XU Hanqiu HU Xiujuan FU Wei LIN Zhongli(College of Environment and Resources ,Fuzhou University ,Fuzhou 350108, China Institute of Remote Sensing Information Engineering, Fuzhou University, Fuzhou 350108, China Fujian Provincial Key Laboratory of Remote Sensing of Soil Erosion and Disaster Protection, Fuzhou University, Fuzhou 350108, China)

机构地区：[1]福州大学环境与资源学院,福州350108 [2]福州大学遥感信息工程研究所,福州350108 [3]福建省水土流失遥感监测评估与灾害防治重点实验室,福州350108

出　　处：《遥感信息》2017年第4期112-119,共8页Remote Sensing Information

基　　金：国家科技支撑项目(2013BAC08B01-05);福建省教育厅重点项目(JA13030)

摘　　要：国内外对林下水土流失区域判别技术的研究很少,利用计算机进行林下水土流失的自动识别更是一个尚待解决的难题。该文利用遥感技术,选取典型的土壤侵蚀区福建省长汀县河田盆地为研究区,综合考虑植被覆盖度、植被健康度和坡度3个因素,建立林下水土流失判别模型,提取了河田盆地林下水土流失区,实现了林下水土流失面积的定量估算和动态监测。结果表明,河田盆地林下水土流失区主要分布于缓坡地带;2011—2014年间,林下水土流失总面积占林地总面积比例由22.13%减少至21.94%,同比下降0.19个百分点,但是在缓坡地带,该比例回升了3.19个百分点。总体来说,河田盆地的林下水土流失状况有一定改善。This study used remote sensing technique to establish a model to extract the area of soil erosion under forest in Hetian basin of County Changting in Fujian province, based on vegetation coverage, vegetation health status and slope. It can quantitatively estimate and dynamically monitor forest soil erosion. The results indicate that understory soil erosion mainly distributed in the gentle slope zones of Hetian basin;in 2011 and 2014, the understory soil erosion area accounts for 22.13 0; and 21.94% ,respectively,of the total forest area,with a reduction of 0.19 percentage points,but a rising of 3.19 percentage points in gentle slope zones during the period. In general, understory soil erosion has been rescued slightly.

关 键 词：林下水土流失 植被覆盖度 植被健康度 坡度 河田盆地 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]