近15年中亚及新疆生态系统水分利用效率时空变化分析
发布时间：2018-11-08 09:08
【摘要】：基于一元线性回归法和Mann-Kendall检验方法,使用2000-2014年遥感数据,分析15年中亚五国及新疆GPP、ET、WUE的空间格局变化及趋势特征,并将参数检验结果相结合进行分类,分析WUE格局变化原因。研究表明:(1)GPP、ET、WUE在时间序列上无显著变化,WUE空间变化显著增加的区域为哈萨克斯坦北部、伊犁河谷和吉尔吉尔斯坦高山区,下降区域为新疆南疆和乌兹别克斯坦灌溉区。(2)WUE变化的主要土地覆盖类型是农田和草地,中密度人口区WUE变化较大。(3)WUE上升因降水增加、退耕导致的GPP增加,干旱胁迫下植被抗逆导致ET下降,WUE下降由于农作物类型转变及灌溉区不合理用水造成。开展中亚WUE空间格局变化研究,可为"一带一路"的顺利推进提供理论依据。
[Abstract]:Based on univariate linear regression method and Mann-Kendall test method, the spatial pattern changes and trend characteristics of GPP,ET,WUE in five countries of Central Asia and Xinjiang for 15 years were analyzed by using remote sensing data from 2000 to 2014, and the results of parameter test were combined to classify. The reason for the change of WUE pattern was analyzed. The results show that: (1) GPP,ET,WUE has no significant change in time series. The regions with significant increase in WUE spatial change are the northern Kazakhstan, the Ili River Valley and the Gilstein Alpine region. (2) the main land cover types of WUE change were farmland and grassland, and WUE in middle density population area changed greatly. (3) the increase of WUE was caused by the increase of precipitation and the increase of GPP caused by returning farmland. Under drought stress, vegetation stress induced the decrease of ET, and the decrease of WUE was caused by crop type change and unreasonable water use in irrigation area. The research on the spatial pattern change of WUE in Central Asia can provide theoretical basis for the smooth advancement of Belt and Road.
【作者单位】： 新疆大学资源与环境科学学院 绿洲生态教育部重点实验室;北京师范大学水科学研究院 环境遥感与数字城市北京市重点实验室;
【基金】：自治区科技支疆项目(201591101) 自治区重点实验室专项基金项目(2016D03001,2014KL005) 国家自然科学基金项目(U1303381,41261090,41161063) 教育部促进与美大地区科研合作与高层次人才培养项目
【分类号】：Q14
[Abstract]:Based on univariate linear regression method and Mann-Kendall test method, the spatial pattern changes and trend characteristics of GPP,ET,WUE in five countries of Central Asia and Xinjiang for 15 years were analyzed by using remote sensing data from 2000 to 2014, and the results of parameter test were combined to classify. The reason for the change of WUE pattern was analyzed. The results show that: (1) GPP,ET,WUE has no significant change in time series. The regions with significant increase in WUE spatial change are the northern Kazakhstan, the Ili River Valley and the Gilstein Alpine region. (2) the main land cover types of WUE change were farmland and grassland, and WUE in middle density population area changed greatly. (3) the increase of WUE was caused by the increase of precipitation and the increase of GPP caused by returning farmland. Under drought stress, vegetation stress induced the decrease of ET, and the decrease of WUE was caused by crop type change and unreasonable water use in irrigation area. The research on the spatial pattern change of WUE in Central Asia can provide theoretical basis for the smooth advancement of Belt and Road.
【作者单位】： 新疆大学资源与环境科学学院 绿洲生态教育部重点实验室;北京师范大学水科学研究院 环境遥感与数字城市北京市重点实验室;
【基金】：自治区科技支疆项目(201591101) 自治区重点实验室专项基金项目(2016D03001,2014KL005) 国家自然科学基金项目(U1303381,41261090,41161063) 教育部促进与美大地区科研合作与高层次人才培养项目
【分类号】：Q14
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