中文摘要：

由使用遥感和 GIS 技术，空间分析和统计分析，我们从 19712004 计算了 Nam 公司湖的水区域和体积变化，并且从气候的变化和水平衡的观点讨论了他们的影响因素。在这研究的数据来源包括湖的深测术的数据，天线调查了 1970 的地志的地图，在湖集水的 1991 和 2004 的遥感图象，来自在湖集水的邻近的区域的在 19712004 以内的 17 个车站的气象学的数据。结果证明湖区域与 2.81 km2 的吝啬的年度增加率(MAIR ) 在 1971 ～ 2004 期间从 1920 km2 膨胀了到 2015 km2 一 ? 1，并且湖体积从 783.23 映汵? 慣敲扩充了吗？

英文摘要：

By using remote sensing and GIS technologies, spatial analysis and statistic analysis, we calculated the water area and volume variations of the Nam Co Lake from 1971-2004, and discussed their influence factors from the viewpoints of climatic change and water balance. Data source in this study includes bathymetric data of the lake, aerial surveyed topographic maps of 1970, remote sensing images of 1991 and 2004 in the lake catchment, meteorological data from 17 stations within 1971-2004 in the adjacent area of the lake catchment. The results showed that the lake area expanded from 1920 km^2 to 2015 km^2 during 1971 to 2004 with the mean annual increasing rate （MAIR） of 2.81 km^2 a^-1, and the lake volume augmented from 783.23×108 m^3 to 863.77×10^8 m^3 with the MAIR of 2.37×10^8 m^3. Moreover, the MAIR of the lake area and volume are both higher during 1992 to 2004 （4.01 km^2 a^-1 and 3.61×10^8m^3 a^-1） than those during 1971 to 1991 （2.06 km^2 a^-1 and 1.60×10^8 m^3 a^-1）. Analyses of meteorological data indicated that the continue rising of air temperature conduced more glacier melting water. This part of water supply, together with the increasing precipitation and the descending evaporation, contributed to the enlargement of Nam Co Lake. The roughly water balance analyses of lake water volume implied that, in two study periods （1971-1991 and 1992-2004）, the precipitation supplies （direct precipitations on the lake area and stream flow derived from precipitations） accounted for 63% and 61.92% of the whole supplies, while the glacier melting water supplies occupied only 8.55% and 11.48%, respectively. This showed that precipitations were main water supplies of the Nam Co Lake. However, for the reason of lake water increasing, the increased amount from precipitations accounted for 46.67% of total increased water supplies, while the increased amount from glacier melting water reached 52.86% of total increased water supplies. The ratio of lake evaporation and lake volume augment showed that