The Northern-Five Lakes are a series of the lakes alongside the Grand Canal in Shandong Province, namely from north to
south the Anshan Lake, Mata Lake, Nanwang Lake, Shushan Lake and Machang Lake. In history they played an essential
role to the running of the Grand Canal of China for centuries. However, drastic decrease both in amounts and in extents
happened during the past century. With the help of the remote sensing and GIS technology, using the multiple spatial data
to monitor the changes of the lakes so as to get to know objectively the status and the changing trends in order to make an
appropriate plan for better utilization, protection and management of the lake resources becomes possible and practical.
This article utilized the map in 1907, the aerial photographs in 1954, MSS imagery in 1975, TM imagery in 1987 and 2001
respectively and SPOT5 multispectral imagery in 2005 to extract the spatial distribution of the lakes in that six periods by
means of visual interpretation and supervised classification. According to the result, the decreasing magnitude, decreasing
speed and the decreasing timetable of the lakes were analyzed, which would provide important reference to quantitative
analysis of the change of the lakes.