于涛;杨延梅;冯建中;白林燕;张沛;雒艺欣;

• 1:重庆交通大学河海学院
• 2:中国农业科学院农业信息研究所
• 3:中国科学院遥感与数字地球研究所

摘要(Abstract)：

针对叶尔羌河流域这一生态脆弱区,基于像元二分法利用MODIS NDVI数据计算该研究区典型正常年份2016年6—9月生长季植被指数(植被覆盖度),分析探讨了该流域植被覆盖度与土地利用/覆盖状况及高程、坡度、坡向等地貌状况主要要素之间的耦合关联关系。结果表明:叶尔羌河下游地区地形起伏较小,植被覆盖状况和土地利用/覆盖类型均具有明显的地带状与分层分布特征,植被覆盖度仅与距离水源地的远近相关性显著,与高程、坡度等其他地貌因子无明显相关性;而叶尔羌河中上游地区植被覆盖状况复杂,植被覆盖度与高程、坡度和坡向三因子总体耦合度较高。高程对植被覆盖状况的影响尤为显著,具有明显的垂直地带性;同时,随着高程增加,坡度对植被覆盖度的影响则表现出一定的垂直周期地带变化特性,以及随着坡向的变化植被覆盖度呈现出由阴坡、半阴坡较高(4 000m以下地区)按"顺时针"向阳坡、半阳坡较高(4 000m以上地区)逐渐转移。

关键词(KeyWords)： 叶尔羌河;植被覆盖度;地貌因子;耦合关系

Abstract:

Keywords:

基金项目(Foundation): 中国科学院“西部之光”人才项目（YBXM-2014-05）;中国科学院战略性先导科技专项（A类）（XDA19030302）;; 国家自然科学基金项目（41771392）;; 中国农业科学院农业信息研究所科技创新工程项目“智慧农业关键技术研究与应用”（CAAS-ASTIP-2017-AII2017）

作者(Authors): 于涛;杨延梅;冯建中;白林燕;张沛;雒艺欣;

DOI: 10.16251/j.cnki.1009-2307.2019.09.010

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