安徽长江以南农业干旱遥感监测研究

Study on Agricultural Drought Monitoring in the South of Yangze River in AnHui

建立干早遥感监测模型并探讨该监测方法的适用性,根据安徽长江以南地区秋季干旱特点,基于NOAA/AVHRR数据采用包含冠层温度的供水植被指数方法,利用极轨气象卫星遥感影像资料和气象台站常年地面土壤水分观测资料对干旱进行监测,结果表明沿江和江南区供水植被指数与20cm土壤墒情的模型达显著水平(P<0.05),模型分别为y20cm=1.6708x+48.889和y20cm=4.18x+18.848,而与10cm土壤墒情的回归方程未通过显著性测验。此外通过模型验证,20cm土壤墒情反演结果与实际情况较为相符,因此供水植被指数方法适用于该区域的干旱监测。

The aim was to establish drought monitoring model and discuss the applicability of the model.Based on the fall drought features in the south district of Yangtze River in AnHui Province,and the NOAA/AVHRR data,the index method was used.The polar orbit meteorological satellite data and surface soil moisture data were used for drought monitoring.The result showed that the model between VSWI and 20 cm soil moisture was significant at 0.05 level,models were y 20cm =1.6708x＋48.889 and y 20cm =4.18x＋18.848 respectively,but the model between VSWI and 10 cm soil moisture was not significant at 0.05 level,through testing and analysis,the too monitoring models could be used in practice.