中文摘要：

城市水塘是珠江三角洲地区常见及分布广泛、且起着极其重要环境与生态作用的城市景观。近20年来广州市的城市水塘因城市快速发展、人类密集活动而大量缩小或消失。本研究以广州市天河区为研究区，解译、比对1995年和2013年两期遥感影像的水塘，用景观生态学方法探讨城市化过程下水塘变化及其影响因素。结果表明：（1）城市水塘数量和面积分别减少了41％和34％，较大面积水塘因数量减少和面积缩减转变为较小面积水塘；（2）五种景观指数的数值变化表明水塘呈小聚集、大离散变化趋势，其几何形状趋于简单及规整。水塘变化剧烈程度自南向北减缓，其变化与趋势和天河区城市化过程与方向一致；（3）消减水塘集中分布在海拔40m以下、距离最近道路1km以内、中、低城市建筑密度和人口密度小于8000人/km2的区域。其消减比例随海拔升高而减小，随其到最近道路距离的增加而减小，随人口密度增大而增加。地形、路网和交通、城市建设、人口增长是天河区城市水体变化的影响因素。

英文摘要：

Urban ponds are commonly seen and widely distributed natural landscape in Pearl River Delta, which are important to the urban environment and ecology. Due to the rapid urbanization and intensive human activity, a great number of urban ponds in central Guang- zhou have been shrinking or replaced in the past two decades. Take Guangzhou＇s Tianhe district where the city＇s CBD is located for example. The remote sensing images （1995 and 2013） were interpreted and compared to find out the variations and the influencing factors of urban ponds under urbanization by landscape ecology methods. Results show that： （1） From 1995 to 2013, the quantities and areas of urban ponds were decreased by 41% and 34% respectively. （2） The variations of five landscape indices show that the urban ponds tended to be aggregative and dispersive, and the geometry of urban ponds tends to be simpler. The severe variations of urban ponds were mitigating from southern to northern Guangzhou, the same as those of urbaniza- tion trends. （3） The disappeared urban ponds were mainly in the regions that were under 40 m above sea level, and the distance to the closest road was within 1 km, the building density was middle or low, and the population density was less than 8000 per kin2. The percentage of disap- peared urban ponds was decreasing with increasing elevation, increasing distance to the closest road, and increasing population density. The elevation, road network, urban construction and the population growth are the main influencing factors of urban ponds variation in Tianhe district.