The shapes of urban rivers and water body were deeply affected by the rapid industrialization and urbanization in recent decades in Guangzhou.The article used topographic maps,remote sensing images and related socio-economic data as a basis data to research the space-time evolution of urban rivers and water body and its causes in Guangzhou in the past two decades.The results indicated that: 1) The changes of area of river and water bogy showed a slight increase trend in the first decade and a sharply reduce...