地理学报 ›› 2019, Vol. 74 ›› Issue (7): 1438-1449.doi: 10.11821/dlxb201907012
吴宜进1,2,赵行双1,2,奚悦1,2,刘慧3,4,李畅1,2()
收稿日期:
2018-07-17
修回日期:
2019-03-06
出版日期:
2019-07-25
发布日期:
2019-07-23
作者简介:
吴宜进(1963-), 男, 江西九江人, 教授, 博士生导师, 主要从事气候变化、区域生态与水土保持等方面的研究。E-mail: wuyijin@mail.ccnu.edu.cn
基金资助:
WU Yijin1,2,ZHAO Xingshuang1,2,XI Yue1,2,LIU Hui3,4,LI Chang1,2()
Received:
2018-07-17
Revised:
2019-03-06
Published:
2019-07-25
Online:
2019-07-23
Supported by:
摘要:
针对缺少基于遥感数据产品的西藏地区植被生态参数筛选及综合评价的研究现状,以2006年和2016年西藏地区MODIS卫星遥感产品反演得到的植被覆盖度、叶面积指数、植被总初级生产力、区域热度与改进的湿度5项指标为基础,提出了基于主成分分析法的西藏植被生态环境质量评价方法,并探索了其时空变化规律及机理。结果表明:① 西藏地区植被生态质量整体较为脆弱,且区域差异明显,呈现东南优、西北差的分布格局。② 2006-2016年间西藏地区植被生态质量总体呈现变好的趋势。在时间序列上,2006-2016年间改善、退化的区域占比分别为31.88%和4.13%;在空间分布上,变好的区域分布在西北、中部和东部,变差的区域集中在东南部。③ 水热状况改善特别是降水量的增加和人为保护政策使得研究区西部和中部地区生态质量有所提高。社会经济活动加强是研究区东南部生态质量变差的主要原因。
吴宜进,赵行双,奚悦,刘慧,李畅. 基于MODIS的2006-2016年西藏生态质量综合评价及其时空变化[J]. 地理学报, 2019, 74(7): 1438-1449.
WU Yijin,ZHAO Xingshuang,XI Yue,LIU Hui,LI Chang. Comprehensive evaluation and spatial-temporal changes of eco-environmental quality based on MODIS in Tibet during 2006-2016[J]. Acta Geographica Sinica, 2019, 74(7): 1438-1449.
Tab. 3
Area distribution of each ecological indexes in Tibet between 2006 and 2016
生态综合 指数等级 | 2006年 | 2016 | |||
---|---|---|---|---|---|
面积(km2) | 百分比(%) | 面积(km2) | 百分比(%) | ||
差(0.0~0.2) | 536545 | 57.63 | 319410 | 35.45 | |
较差(0.2~0.4) | 251186 | 26.98 | 379048 | 42.07 | |
中等(0.4~0.6) | 105307 | 11.31 | 161781 | 17.96 | |
良(0.6~0.8) | 30960 | 3.33 | 35122 | 3.90 | |
优(0.8~1.0) | 7051 | 0.76 | 5567 | 0.62 |
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