石羊河流域水质环境遥感监测评价研究

THE APPLICATION OF REMOTE SENSING TECHNIQUE TO MONITORING AND EVALUATING WATER POLLUTION IN THE SHIYANG RIVER VALLEY

利用遥感技术对流域水质环境的监测评价,可实现全流域水质的同步监测,其监测结果具有可比性。以石羊河流域为实验区,研究了一种基于遥感技术的河流水质环境监测与评价方法,该方法克服了传统监测方法的局限性,完善了表面水质遥感信息获取的基础方法研究体系。

Due to the fast social and economic development in its valley, the Shiyang River has experienced tremendous environmental changes, especially in the past decade. It is rather difficult to detect the long-period and complex changes of water quality merely by means of traditional measurements. In this paper, the remote sensing technology was used to monitor and evaluate the water quality in the Shiyang river. Combining the TM data with the pollutant in the water, the authors developed an inversion model, with which one can easily evaluate the content of pollution in the water by using the TM data. The historical Landsat (TM) data obtained in four consecutive years were employed to extract the changing information of the river water. The results show an alarming fast increasing trend of pollution in the river. The method was used to extract the water pollution information in the river, and the results show its good performance with a monitoring accuracy of 84%, suggesting a great potential of this method in this field .