人工衛星データ及び地理情報システムを用いた公共牧場の動態解明に関する研究

利用卫星数据和地理信息系统阐明公共牧场动态的研究

基本信息

批准号：
12660239
负责人：
TSUIKI Mikinori
金额：
$ 2.3万
依托单位：
Iwate University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12660239/
关键词：
Remote sensing Landsat TM Public pasture vegetation Miscanthus sinensis A.Landsat TM Terra ASTER 牧草地野草地シバ

项目摘要

46 public pastures in Iwate prefecture were investigated. Duration, total area, area of artificial grassland, way of use and grazing animals were recorded in each pasture. Map images on a scale of 1 to 25,000 and Landsat TM images which were observed May 29,1996 were collected by each pasture, and both images were overlayed to select grassland area. Miscanthus type vegetation was investigated in some pastures. And land cover classification by maximum likelihood method was applied with the result of filed investigation. In Hinoto pasture, kuzakai pasture, Yamatanikawame pasture, Sumida pasture, Natsumusiyama pasture, Niizato pasture, Kanegasaki pasture and Tonan pasture, Miscanthus sinebsis was invated into artificial grasslands. In some cases, standing dead of grass was misclassified into Miscanthus sinensis. The use of remote sensing images observed in autumn, which is the blooming season of Miscanthus sinensis, will improve the accuracy of classification.Zoysia type grassland was maintained for long period in Appi pasture. But grazing use was ended in 1985 by decrease of livestock farmer and extension of intensive management, and vegetation of garssland was changing gradually. Vegetation servay was practiced in 2002,and the result was compared with that in 1981.SDR(Summed Dominance Ratio) 2 of Zoysia japonica decreased and SDR2 of Pteridium aquilinum (L.) Kuhn, Anthoxanthum odoratum L.and Malus sieboldii increased in these 21 years. Multi-temporal remote sensing data showed yearly change of normalized difference vegetation index(NDVI), which reflect the vegetation change of this period.

对岩手县46个公共牧场进行了调查。记录各牧场的持续时间、总面积、人工草地面积、利用方式和放牧动物情况。采集各牧场1~25,000比例尺的地图影像和1996年5月29日观测到的Landsat TM影像，将两幅影像叠加以选定草地区域。在一些牧场对芒草型植被进行了调查。结合实地调查结果，采用最大似然法对土地覆盖进行分类。在日野牧场、久坂井牧场、山谷川目牧场、墨田牧场、夏舞山牧场、新里牧场、金崎牧场、远南牧场等地，芒草被侵入人工草地。在某些情况下，枯死的草被错误地分类为芒草。利用秋季芒花盛开季节观测的遥感影像，可以提高分类的准确性。安皮草场长期维持结缕草型草地。但随着畜牧户的减少和集约化经营的扩大，1985年放牧结束，草地植被逐渐发生变化。 2002年实施植被服务,与1981年相比,21个品种中结缕草SDR(Summed Dominance Ratio)2下降,凤尾蕨、玉竹、天女果SDR2上升年。多时相遥感数据显示归一化植被指数(NDVI)的逐年变化，反映了该时期植被的变化。