| 1998-2011年海河流域植被覆盖变化及气候因子驱动分析 |
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| 引用本文： | 王永财,孙艳玲,王中良.1998-2011年海河流域植被覆盖变化及气候因子驱动分析[J].资源科学,2014,36(3):594-602. |
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| 作者姓名： | 王永财 孙艳玲 王中良 |
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| 作者单位： | 天津师范大学城市与环境科学学院, 天津 300387;天津师范大学城市与环境科学学院, 天津 300387;天津师范大学城市与环境科学学院, 天津 300387;天津师范大学天津市水资源与水环境重点实验室, 天津 300387 |
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| 基金项目： | 全球变化研究国家重大科学研究计划项目（编号：2012CB956203）；国家科技支撑计划项目课题（编号：2012BAC07B02）；教育部新世纪优秀人才支持计划（编号：NCET-10-0954）；国家自然科学基金（编号：41001022，31270510）；天津师范大学市级重点实验室开发研究基金课题（编号：YF11700102）。 |
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| 摘 要： | 基于1998-2011年的SPOT/NDVI数据，结合海河流域土地覆盖数据分析了海河流域植被覆盖的时空变化特征，然后利用海河流域30个气象站的气温和降水资料对海河流域植被覆盖变化的气候驱动力进行了分析。结果表明：1998-2011年海河流域NDVI呈缓慢上升趋势，植被覆盖状况总体上在改善，但是在空间存在明显差异，其中农田、森林、湿地改善最为明显，植被明显改善区域与植被高波动区分布基本一致，植被覆盖基本不变区域与植被低波动区基本一致；海河流域植被覆盖变化受气候因子驱动的面积比例为31.7%，非气候因子驱动型分布于整个流域，占整个流域面积的68.3%，其分布地区土地覆盖类型主要是农田、建设用地，表明人类活动对植被变化的影响较大。
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| 关 键 词： | 海河流域 SPOT/NDVI 植被覆盖变化 气候因子 |
| 修稿时间： | 1/7/2014 12:00:00 AM |
Spatial-Temporal Change in Vegetation Cover and Climate Factor Drivers of Variation in the Haihe River Basin 1998-2011 |
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| WANG Yongcai,SUN Yanling and WANG Zhongliang.Spatial-Temporal Change in Vegetation Cover and Climate Factor Drivers of Variation in the Haihe River Basin 1998-2011[J].Resources Science,2014,36(3):594-602. |
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| Authors: | WANG Yongcai SUN Yanling and WANG Zhongliang |
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| Institution: | College of Urban and Environment Science, Tianjin Normal University, Tianjin 300387, China;College of Urban and Environment Science, Tianjin Normal University, Tianjin 300387, China;College of Urban and Environment Science, Tianjin Normal University, Tianjin 300387, China;Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, China |
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| Abstract: | Global warming has led to significant vegetation changes,especially in the past 20 years. The Haihe River Basin is an important agricultural and industrial region in China and under the influence of climate and human activities its ecological environment is changing. It is essential to conduct studies on spatial-temporal change in vegetation and drivers of variation based on remote sensing data. Here,we use remote sensing data for the SPOT Vegetation Normal Difference Vegetation Index(NDVI),which reflects characteristics of plant growth. Combining land cover data and climate data,we analyze the change in vegetation cover and divers across the Haihe River Basin from 1998 to 2011. We found that vegetation cover improved slightly in the basin as a whole. Across all land cover types,farmland,wetland and forest improved more than others. The distribution of improved areas was consistent with high volatility areas. The distribution of basic invariant regions was consistent with low volatility areas. Most studies suggest that vegetation change is closely correlated with climate factors. So by correlation analysis we found that it is better correlated between NDVI and precipitation than temperature in most parts of the basin, suggesting that precipitation is the main factor responsible for vegetation change. According to partial correlation and multiple correlation analyses,drivers of change show that about 31.7% of the study area was impacted by climate factor drivers,while 68.3% was driven by non-climate factors. Therefore,it is clear that vegetation change is mainly affected by human activities. |
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| Keywords: | Haihe River basin SPOT NDVI vegetation cover change climate factors |
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