| 基于Ts-EVI特征空间的春旱遥感监测——以河北省为例 |
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| 引用本文： | 闫峰,王艳姣,武建军.基于Ts-EVI特征空间的春旱遥感监测——以河北省为例[J].干旱区地理,2009,32(5). |
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| 作者姓名： | 闫峰 王艳姣 武建军 |
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| 作者单位： | 1. 北京师范大学地表过程与资源生态国家重点实验室,北京,100875;民政部/教育部减灾与应急管理研究院,北京,100875
2. 中国气象局国家气候中心,北京,100081 |
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| 基金项目： | 国家自然科学基金项目(40801173); 中国博士后科学基金资助项目(20070420308); 国家863项目(2006AA12Z142) |
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| 摘 要： | 春季干旱是影响我国农业生产的重要自然灾害。以河北省为研究区,采用Ts-EVI构建的特征空间,以温度植被干旱指数TVDI作为土壤水分估算因子对2005年4～5月的春旱发生与发展进行遥感监测,主要得出以下结论:(1)表层土壤相对湿度RSM_(10)与TVDI的相关性均通过了α=0.001水平的置信度的t检验而表现出显著相关性,基于Ts-EVI特征空间构建的TVDI可以较好地估算土壤表层水分状况。(2)TVDI与不同土壤深度RSM的相关性在不同时期存在一定的差异,4月上旬～4月中旬以10 cm深度处的相关性最高,20 cm处次之;4月下旬～5月下旬以20 cm土壤深度处的相关性最好,10 cm处次之。(3)在不统计云覆盖地区旱情的情况下,2005年4月上旬河北省春旱面积为15 014.4 km~2;4月中旬～5月下旬的春旱面积分别为43 350.4 km~2、13 889.3km~2、71 664.3 km~2、12 864.8 km~2和44381.5 km~2。
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| 关 键 词： | Ts-EVI 春旱 遥感监测 河北 |
Application of Ts-EVI character space to monitor spring drought——a case study in Hebei China |
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| YAN Feng,WANG Yan-jiao,WU Jian-jun.Application of Ts-EVI character space to monitor spring drought——a case study in Hebei China[J].Arid Land Geography,2009,32(5). |
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| Authors: | YAN Feng WANG Yan-jiao WU Jian-jun |
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| Institution: | YAN Feng~(1,2),WANG Yan-jiao~3,WU Jian-jun~(1,2) (1 State Key Laboratory of Earth Surface Processes and Resource Ecology,Beijing Normal University,Beijing 100875,China,2 Academy of Disaster Reduction and Emergency Management,Ministry of Civil Affairs & Ministry of Education,3 National Climate Center,China Meteorological Administration,Beijing 100081,China) |
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| Abstract: | Spring drought is one of the most serious disasters to agriculture in China.In this paper,MYD09A1 and MYD11A2,the 8 -day reflectivity and land surface temperature composite productions provided by NASA,which derived from MODIS(Moderate Resolution Imaging Spectroradiometer) images from April to May in 2005 were used to study drought conditions in Hebei China.Enhanced vegetation index(EVI) was acquired from reflectivity productions and triangle character space with land surface temperature(Ts) and EVI was con... |
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| Keywords: | Ts - EVI spring drought monitoring Hebei |
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