摘要
在对TVDI指数计算公式进行改进的基础上,依据河南省2014年3—10月共8个月的MODIS数据,对河南省全境的TVDI指数进行计算,并根据计算结果对河南省干旱过程的时空变化范围进行监测分析。研究结果表明:2014年河南省干旱发生在4月、5月和7月,其中7月重旱范围达到38%、中旱范围达到15%,进入8月后旱情逐渐减轻,进入10月旱情逐渐消除;基于改进的TVDI指数对河南省旱情的动态监测结果与实测的河南省干旱发生过程基本相符,表明该方法可以用于河南省的旱情动态监测。
Under the foundation of the improved TVDI index formula and based on the MODIS data of Henan Province from March to October of 2014, the TVDI index of the whole area was calculated. On the basis of the study results, the monitoring of drought in Henan Provincewithin temporal and spatial range was analyzed. The results of the study show that the drought occurred in April, May and July of 2014 inHenan Province, especially in July the heavy drought area reaches to 38% and medium drought area reaches to 15% ; the drought areapercentage reduces gradually after entering in August and gradually eliminates in October; at the same time through the analysis contrastingwith the monitoring results from the Henan Provincial Meteorological Station, it shows that the dynamic test results of drought progress basedon improved TVDI index, matched with the actual drought occurrence process of Henan Province and that the improved TVDI index can provide an effective method of drought monitoring for Henan Province.
出处
《人民黄河》
CAS
北大核心
2016年第11期50-53,144,共5页
Yellow River
基金
国家自然科学基金资助项目(51309108)
