海南岛农业干旱综合监测研究  

Study on Agricultural Drought Comprehensive Monitoring in Hainan Island Based on MODIS Data and Meteorological Data

作　　者：李海亮[1] 戴声佩[1] 胡盛红[2] 田光辉[3] 罗红霞[1] 

机构地区：[1]中国热带农业科学院科技信息研究所/海南省热带作物信息技术应用研究重点实验室,海南儋州571737 [2]中国热带农业科学院环境与植物保护研究所,海南儋州571737 [3]海南省气象科学研究所,海南海口570203

出　　处：《中山大学学报（自然科学版）》2012年第6期126-130,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(40971218);中央级公益性科研院所基本科研业务费专项资金(中国热带农业科学院院本级)资助项目(1630012012017);海南省热带作物信息技术应用研究重点实验室开放基金(rdzwkfjj003)

摘　　要：采用遥感信息与地面气象观测数据相结合的方法进行农业干旱监测研究。选择适合高植被覆盖区旱情监测的标准化植被供水指数及适合热带气候区旱情监测的综合降水距平指数作为参数,通过与同步实测土壤含水量的数据融合构建农业干旱综合指数模型。用检验样点的实测数据对模型进行精度验证与实用性评价,检验结果显示均方根误差RMSE为4.65%,相对均方根误差RMSEr为19.28%,说明该模型具有较高的精度,可以用来监测海南岛的农业干旱。利用模型对海南岛2004年10月至2005年1月旱情进行监测与分析。结果表明海南岛旱情西部重于东部、北部重于南部、四周平原重于中部山区。2004年10月上旬起旱情持续加重,12月上旬达到旱情高峰,12月中旬旱情略有缓解,但直至监测末期2005年1月下旬旱情依然严重。旱情随着海拔、坡度减小而加重的趋势明显;平地旱情比坡地重,旱情随坡向的分异不是很明显。In this paper, the agricultural drought was monitored based on the MODIS data and meteoro- logical data. The agricultural drought index model was established by the standardization vegetation supply water index （SDI）, comprehensive precipitation departure index （MSRI） and soil moisture data measured simultaneously. The SDI is suitable for drought monitoring in high vegetation cover region, and the MSRI is suitable for drought monitoring in tropical climate area. The model accuracy was evaluated by the measured data in May 2011 in Hainan Island. The results show that root mean square （RMSE） of the model is d. 65% and the relative root mean square （RESEt） is 19.28%, indicating that the model has higher accuracy and can be used to monitor agricultural drought in Hainan Island. The model was used to monitor agricultural drought in Hainan Island from October in 2004 to January in 2005. Based on the results of agricultural drought monitoring, temporal attribute and spatial distributions of droughts in the study area were briefly discussed. The drought occurrences had some little fluctuations, but with a developing trend. The drought in west and north is more serious than in east and south of the island. As a whole, the drought is more serious in the plain than that in the mountain area of the central section of Hainan during the monitoring period, with an obvious temporal change trend. The drought was aggravated with the elevation and slope decrease. The drought in the plain is more serious than in the slope land and the aspect differentiation of drought is not obvious.

关 键 词：MODIS 农业干旱 旱情指数 综合监测 海南岛 

分 类 号：S127[农业科学—农业基础科学]