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- 2018
三江源典型区草地退化Hyperion高光谱遥感识别研究
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Abstract:
三江源草地退化直接影响当地及长江、黄河和澜沧江中上游地区的生态安全、水资源合理利用、经济可持续发展和社会稳定，一直是人们关注的焦点问题。近年来，该地区草地群落毒杂草组分增大，退化严重。高光谱遥感具有精细识别草地种群的潜在能力，如何利用其进行草地群落组成信息探测并进行退化识别是当前研究的热点和难点问题。利用卫星高光谱Hyperion影像和地面实测高光谱遥感数据，通过多端元混合像元分解技术，提取可食牧草、毒杂草以及裸土组分信息；以此为指标对研究区草地退化程度进行分类识别，依次为：未退化、轻度退化、中度退化、重度退化和极度退化。利用野外样方实测数据验证监测结果，精度达到84.2%，表明高光谱遥感对草地退化探测具有良好的应用潜力
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