The change of the internal structure of land use is influenced by the natural environment and social economic conditions .To investigate the change characteristic of karst water source protection area in Guiyang city , this article takes "Two lakes and one reservoir" water source protection area as an example and uses the four remote sensing images from 1973 (MSS) ,1993 (TM ) ,2001 (TM ) and 2010 (ALOS) ,which aim to explain and analyze the compression degree and the driving mechanism of the change of the land use structure to the water area .The research shows that the water area of "two lakes and one reservoir" water source protection area presented an increasing trend between 1973 and 2001 .The overall growth of total quantity was 28 .47km 2 and growth speed was 0 .62km2/a .The reason of that was the transformation of returning arable farmland to lake ,grassland and forest .But the water area gradually reduced to 84 .75km2 from 2001 to 2010 ,which was because of the increase of urban water consumption and the decline of water level .The key factors affecting "two lakes and one reservoir" water source protection area are the interannual change of cultivated land ,regional surface water supply and the water consumption .Therefore , the rational utilization and conservation of water resources is the key to the development of social economy .%指出了土地利用内部结构的变化特征受地表自然环境和社会经济条件的复合影响，为探讨喀斯特水源保护区水域范围变化特征，以贵阳市“两湖一库”水源保护区为例，利用1973（MSS）、1993（TM ），2001（TM ）和2010（ALOS）年4期遥感影像，解译并分析了土地利用结构变化对水域范围的压缩程度和驱动机制，研究结果表明：“两湖一库”水源保护区水域面积在1973～2001年间呈增长趋势，总增长量28．47 km2，增长速度达0．62 km2／a ，增长原因在于退耕还湖和林草地的转化；2001～2010年水域面积逐渐减少至84．75 km2，主要由于城市用水量增加、水位下降造成。影响“两湖一库”水源保护区水域面积关键在于耕地的年际变化以及区域地表水资源补给量和用水量，合理利用和保护涵养地水源是社会经济发展的关键。
展开▼
