期刊论文

中文

湖北大学学报(自然科学版)

1000-2375

2018

40

6

580-585

10.3969/j.issn.1000-2375.2018.06.006

农业部农业信息技术重点实验室开放课题（2016002）； 华中师范大学大学生创新创业训练计划项目（228）资助；

本校为第一机构

以国产高分一号（GF-1）遥感数据为数据源,以荆州市公安县为实验区,选择垂直干旱指数（PDI）、改进型的垂直干旱指数（MPDI）和植被调整垂直干旱指数（VAPDI）,对土壤湿度指数反演的效果进行比较和验证,同时为减少水体对地表反射率的干扰,采用归一化差异水体指数法（NDWI）对水体进行掩膜处理.研究结果表明,PDI、MPDI和VAPDI分别反演得到的土壤湿度值与实测值的相关系数为0. 520 5、0. 697 2、0. 687 2,实测土壤含水量验证精度评价也表明各模型均能满足反演的精度要求;在植被覆盖较好的农区,MPDI和VAPDI能够在一定程度上克服混合像元对土壤湿度光谱信息的影响,模型拟合效果优于PDI.研究结果可为...

In order to explore the applicability of soil moisture inversion model in farmland vegetation area,three models of soil moisture inversion based on PDI,MPDI and VAPDI were built by using the domestic GF-1 remote sensing data with high spatial and temporal resolution as the data source,and Gongan,Jingzhou County as the study area.After the mask processing to water body using normalized difference water index(NDWI)method,the interference of water to the acquisition of surface reflectance is reduced to some extent.The results show that the correlation coefficients between the measured soil moistu...