基于中巴地球资源1号卫星的太湖表层水体水质遥感

利用CBERS 1的CCD数据和准同步地面监测数据,结合水体组分的光谱特征,建立了太湖表层水体叶绿素a和总氮的遥感信息模型.将模型用于2000 09 16太湖表层水体,所得结果较客观地反映了叶绿素a和总氮的分布趋势,表明利用CBERS 1的CCD数据进行湖泊表层水体水质指标监测具有重要的现实意义和应用前景.由于地面监测站位有限,模型在浅水草型湖泊———东太湖的适用性受到一定限制,说明同步性好、覆盖广的地面监测对于水质遥感信息模型的准确性和适用性至关重要.

Monitoring the surface water quality of Taihu Lake based on the data of CBERS-1

Models for the estimation of concentration of chlorophyll-a and total nitrogen concentrations in surface water of Taihu Lake have been proposed based on the regression analysis between the CBERS-1 CCD data and semi-synchronous ground referenced data, with the consideration of the spectral characteristics of water components. Models were used to calculate of chlorophyll-a and total nitrogen concentrations in surface water of Taihu Lake on Sep.16, 2000. The results from the models agred well with those of ground monitoring ones and the overall distributions of chlorophyll-a and total nitrogen, which indicating that CBERS-1 CCD data had realistic significance and promise of application in monitoring key parameters of water quality. However, due to the limited ground stations, the models could not be extended to the eastern Taihu Lake, which was a typical ad littoral herby lake. It was implied that the synchronization and the covering range of the ground monitoring were crucial to the accuracy and applicability of the remote sensing information and models.