资源科学 ›› 2019, Vol. 41 ›› Issue (3): 591-600.doi: 10.18402/resci.2019.03.16
收稿日期:
2018-09-30
修回日期:
2018-11-16
出版日期:
2019-03-20
发布日期:
2019-03-20
作者简介:
作者简介:朱长明,男,博士,副教授,主要研究方向为遥感信息提取、生态环境遥感以及干旱区水文水资源研究。E-mail:
基金资助:
Changming ZHU1(), Junli LI2(
), Zhanfeng SHEN3,4, Qian SHEN1
Received:
2018-09-30
Revised:
2018-11-16
Online:
2019-03-20
Published:
2019-03-20
摘要:
针对塔里木河下游生态输水的绩效评估和环境效益问题,本文采用2000—2017年的16天合成的MOD13Q1密集时序NDVI数据,辅助以GF-2数据,反演和监测塔里木河下游植被覆盖度(FVC)变化;进而通过最大和平均植被覆盖度指标,探讨了塔里木河下游植被在生态输水条件下的生长和恢复情况。结果表明:总体上,近20年来随着塔河的综合治理工程和人工生态调水工程的推进,塔河下游植被恢复明显,最大植被覆盖度和平均植被覆盖度均呈现显著增加的趋势(P<0.01),高植被覆盖区从2000年的3425.95 km2增加到2017年5486.52 km2,中植被覆盖区从2000年的6508.18 km2增加到2015年的7131.23 km2。在时间演化过程上,区域植被覆盖度上升变化过程中存在波动性和不稳定性,整个过程可分为3个阶段(2000—2005年快速上升,2006—2009年波动下降,和2010—2017年稳步上升)。在空间格局上,2000—2017年间FVC增加区域主要分布在河道两旁和河流的尾闾湿地,距离河道越近植被恢复越好,远离河道10 km FVC变化特征不显著(P>0.05)。结合下游生态输水数据分析表明,塔河下游植被恢复与输水量之间存在强依赖关系,且对生态输水的响应存在时间滞后性。
朱长明, 李均力, 沈占锋, 沈谦. 基于MODIS密集时间序列数据的塔里木河下游植被活动过程监测[J]. 资源科学, 2019, 41(3): 591-600.
Changming ZHU, Junli LI, Zhanfeng SHEN, Qian SHEN. Spatiotemporal dynamics of vegetation activities in the lower reach of the Tarim River based on MODIS intensive time series data[J]. Resources Science, 2019, 41(3): 591-600.
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