摘要
季节性裸露农田是北京地区冬春季大气“土壤尘”的主要来源。而农田季节性裸露的快速、准确监测是治理方案制定与实施的依据。根据北京地区裸露农田种植作物和其它地表覆盖类型的物候特征之间的差异,选用2004年春夏季3个时相的TM遥感影像数据,利用垂直植被指数,同时结合北京地区的DEM数据以及北京地区的行政边界矢量数据,建立了北京地区季节性裸露农田遥感监测专家模型。监测结果表明北京市2003年冬至2004春裸露农田面积为87362.57 hm2,主要分布在延庆、顺义、密云、通州等区县。依据监测结果,提出了季节性裸露农田防治建议。
The temporal naked cropland is the main sources of the dust of Beijing area in winter and spring. While the timely and exact monitoring of the temporal naked cropland is important to make and realize the reconditioning plan. In this paper, based on the phenological feature difference of the crops planted in the temporal naked cropland and the other land cover types, 3 TM images of different time in spring and summer 2004 which cover Beijing area are selected. The PVI （Perpendicular Vegetation Index） are computed and used while the DEM （digital elevation model） and the vector of Beijing district boundary are adopted too. Based on the different phenological feature of different land cover, the expert models to monitor the naked cropland of Beijing area in winter and spring were built. The area of the temporal naked cropland which scatter mainly in Yanqing county, Miyun county, Shunyi district, Tongzhou district and Daxing district from winter 2003 to spring 2004 is 87362.57 hm^2 with the model provided in this paper. By the monitoring result, the measures were presented to prevent the temporal naked cropland.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2005年第11期90-94,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家高技术研究发展计划(2003AA209040)资助
关键词
农田裸露
多时相
遥感
垂直植被指数
监测
naked cropland
multi-temporal
remote sensing
perpendicular vegetation index
monitoring
