CAJ | 학술논문

通过对三江源区高寒草地现状调查,依据地上生物量和植被盖度将高寒草地退化分为未退化、轻度、中度、重度、极度退化5个等级。结合调查期间的MODIS影像,分别建立基于NDVI的地上生物量和植被盖度模型,按照退化等级标准分类,制作了相应的退化等级图,并统计各退化等级的面积和比例。结果表明：研究区域未退化草地所占草地面积比例为33.23%,轻度退化草地所占草地面积比例为25.55%,中度退化草地所占草地面积比例为15.72%,重度退化草地所占草地面积比例为12.48%;极度退化草地所占草地面积比例为13.02%。
통과대삼강원구고한초지현상조사,의거지상생물량화식피개도장고한초지퇴화분위미퇴화、경도、중도、중도、겁도퇴화5개등급。결합조사기간적MODIS영상,분별건립기우NDVI적지상생물량화식피개도모형,안조퇴화등급표준분류,제작료상응적퇴화등급도,병통계각퇴화등급적면적화비례。결과표명：연구구역미퇴화초지소점초지면적비례위33.23%,경도퇴화초지소점초지면적비례위25.55%,중도퇴화초지소점초지면적비례위15.72%,중도퇴화초지소점초지면적비례위12.48%;겁도퇴화초지소점초지면적비례위13.02%。
Alpine grassland situation of Three-River source area was surveyed on ground biomass and vegetation coverage.And the alpine grassland was divied into five ranks（non-degeneration,mild,moderate,severe and extreme degeneration）.We established a model of ground biomass and vegetation coverage based on NDVI.According to degeneration rank,we had drawn a corresponding degeneration rank chart and calculated the area and proportion of each degenerated rank.The result indicates that the proportion of the non-degeneration,mild,moderate,severe,extreme degeneration was 33.23%,25.55%,15.72%,12.48% and 13.02% respectively.