摘要
以裸露地表、部分覆盖度地表和全植被覆盖地表3种不同下垫面类型为着眼点,详尽地阐述了相应下垫面类型下不同的干旱遥感监测技术方法的适用范围和其监测的优劣。下垫面为裸露地表时,微波遥感法具有广阔的前景;部分覆盖时双层模型法较好,但模型复杂,应注重经典双层模型的简化;全覆盖时各类监测方法各有优劣。提出未来干旱遥感监测的发展方向和应用前景,对应用遥感技术进行干旱监测相关业务的开展提供有益的参考。
The advantages and disadvantages of the relevant drought remote sensing techniques are analyzed in detail on the basis of three kinds of different underlying surfaces （bare surface, partly and fully covered surface by vegetation）. In the case of the bare underlying surface, the microwave remote sensing method has great potential; in the case of the partly covered underlying surface, the double model method is better, which is, however, complicated, and in which the emphasis should be put on the simplification of the classic layer model. In the case of the fully covered underlying surface, each monitoring method has both good and bad sides. Meanwhile, the developing trend and application prospects of the remote sensing techniques are discussed, so to provide useful reference to drought monitoring service.
出处
《气象科技》
2007年第4期574-578,共5页
Meteorological Science and Technology
基金
科技部社会公益研究专项项目(2005DIB3J103)
中国气象局新技术推广项目(CMATG2005M45)共同资助
关键词
干旱
遥感
热惯量
微波
距平植被指数法
植被覆盖
drought, remote sensing, thermal inertia, microwave, anomaly vegetation index, vegetation cover
