基于MODIS数据的钱塘江河口段植被指数遥感调查

使用栅格数据统计方法建立了同一区域内不同年份的MODIS植被指数变化栅格图，同时通过分析栅格数据统计直方图，建立了MODIS-NDVI变化强度指数，对钱塘江河口段从2000年至2004年间的植被覆盖与变化情况进行了统计和分析。研究表明，使用MODIS-NDVI数据较以往的AVHRR、TM卫星遥感数据更适合于大范围、实时动态的植被覆盖变化动态监测，主要表现在监测精度的提高以及实效性的保障等。该研究为维护钱塘江生态、了解流域生态环境的健康状况、实现流域水资源开发利用与社会经济发展协调、保持环境生态的可持续性、进行科学的决策与有效管理提供了有使用价值的生态环境状况数据支持。

Remote sensing investigation on vegetation index based on MODIS data in Qiantang River estuary

The grid diagram of MODIS vegetation index at the same region and in different years is set up by the statistical method of grid data.Meanwhile,the MODIS-NDVI variation strength index is formed by using grid data statistical histogram to analyze and count the vegetation cover and variation in Qiantang River estuary reach from 2000 to 2004.The research shows that the data obtained from MODIS-NDVI are more suitable to dynamic monitoring vegetation cover variation.The result provides valuable data support for protecting Qiantang River ecology,knowing ecological environment situation,developing corrdinately water resources and social economy and maintaining the lastingness of ecological environment.