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对田间持水量的遥感获取方法进行了探讨,基于传统的田间持水量测定方法--围框淹灌法的思路,利用AMSR-E(Advanced Microwave Scanning Radiometer,即高级微波扫描辐射计)数据高时间分辨率的特点,提出了基于AMSR-E数据估测田间持水量的方法,并采用2003~2007年的AMSR-E数据制作了我国华北平原及东北地区的田间持水量分布图。结果显示东北地区北部、河南东部、安徽北部以及江苏北部等地区的田间持水量较高;由AMSR-E数据获取的田间持水量明显小于气象站点的测定值,与实测值的相关系数R2为0.522,与实测值有显著的相关关系,表明AMSR-E数据具有正确反映田间持水量的潜力。
This paper discussed the remote sensing method of field water holding capacity. Based on the idea of the traditional method of measuring the holding capacity of the field-perimeter frame flooding method, the AMSR-E (Advanced Microwave Scanning Radiometer) The paper proposed a method to estimate the field water holding capacity based on the AMSR-E data. The distribution of the field water holding capacity in the North China Plain and Northeast China from 2003 to 2007 was made using AMSR-E data. The results showed that the field water holding capacity in the northern part of Northeast China, eastern Henan, northern Anhui and northern Jiangsu was high. The field water holding capacity obtained from AMSR-E data was significantly less than the measured value of the weather station, and the correlation coefficient R2 with the measured value was 0.522 , Which has a significant correlation with the measured values, indicating that AMSR-E data have the potential to correctly reflect the field water holding capacity.