摘要
通过充分挖掘水文数据和遥感数据的优势,确定了旱情监测与评估的方法,构建了辽宁省旱情监测与评估系统。结果表明,从气象干旱、水文干旱和土壤干旱3方面选取的6个指标适合于基于水文数据的旱情监测研究,依据时间的不同选取的表观热惯量模型和地表温度植被指数斜率法模型适合于基于遥感数据的旱情监测研究;利用空间分析方法确定的作物受灾面积和利用回归分析法确定的作物减产率模型适合于作物减产率的评估;系统运行后,可以实现每旬发布1次旱情监测结果,每旬发布1次作物受灾面积评估,每年发布1次作物减产情况评估,实现抗旱管理工作的网络化。
Based on the hydrological and RS data,the drought monitoring and evaluating methods were determined,and the drought monitoring and evaluating system in Liaoning Province was constructed.As indicated by the results,the six indexes selected from the meteorological drought,hydrologic drought and soil drought were suitable for the drought monitoring based on hydrological data,while the ATI and LST/NDVI models were suitable for the drought monitoring based on RS data.The disaster-affected area determined by the spatial analysis method and the yield reduction model determined by regression analysis method were suitable for evaluating the yield decrease rate.The system could release the drought monitoring result and disaster-affected crop area every ten days,and the evaluating results of crop yield reduction one time a year,which helped form the drought resisting and management network.
出处
《安徽农业科学》
CAS
北大核心
2011年第26期16024-16026,共3页
Journal of Anhui Agricultural Sciences
基金
水利部公益性行业科研项目"辽西北农业干旱防御与抗旱减灾关键技术研究项目(201101061)"
辽宁省科技厅重大科技攻关项目"辽宁省旱情监测与评估信息系统研究"
关键词
旱情
监测
评估
辽宁省
Drought
Monitoring
Evaluating
Liaoning Province
