中文摘要：

吸收特性是水体重要的光学特性,也是建立水色反演分析模型的基本参数.本文利用2011年6、9、10月在二龙湖和2012年10月在东辽河的实测数据,通过测定水体营养水平和颗粒物、有色可溶性有机物（CDOM）等光学活性物质的吸收系数,分析了东辽河河湖的光学物质吸收特性和季节变化.结果表明：二龙湖水体9月处于富营养状态,6月营养水平较低,10月则处于中营养水平;东辽河随采样点位置的差异呈现不同程度的富营养化.水体各组分的吸收系数均随营养水平的增加而逐渐增大.6、10月二龙湖水体总悬浮颗粒物吸收光谱与非色素颗粒物吸收光谱相似,在总吸收中占主导作用的是CDOM;9月总悬浮颗粒物吸收光谱则与浮游植物吸收光谱类似,浮游植物的吸收对总吸收的贡献率最大.6、9月二龙湖浮游植物吸收系数[aph（440）]与总磷（TP）呈正相关,6月二龙湖aph（440）与溶解有机碳（DOC）呈正相关,非藻类颗粒物吸收系数[ad（440）]仅与叶绿素a浓度（Chl a）具有相关性.二龙湖（9月）与东辽河aph（675）均与Chl a、卡尔森指数（TLI）相关性较好.东辽河流域的河湖水体光学特性存在比较明显的差异：东辽河水体的浮游植物吸收光谱曲线展现出了两种不同类型,浮游植物、非藻类颗粒物、CDOM的贡献率随采样点的不同而相差较大;营养水平较高的9月二龙湖与东辽河水体浮游植物主导了水体光谱吸收,而在二龙湖营养水平较低的月份中（6、10月）,颗粒物与CDOM共同主导水体光谱吸收;6月二龙湖与10月东辽河水体CDOM的组成为大分子颗粒物,而9与10月其组成更趋向于小分子颗粒物.

英文摘要：

The absorption characteristics of optically active constituents （OACs） in water column are important optical properties and basic parameters of establishing the inverse analysis model. Comparative analyses about seasonal variability of the optical absorption characteristics （ phytoplank- ton, non-algal particles and chromophoric dissolved organic matter absorption characteristics） and water quality status of East Liaohe River basin were conducted based on the water samples in Erlong- hu Reservoir collected in June, September and October of 2011 and samples in East Liaohe River in October of 2012. The results demonstrated that the eutrophication status of Erlonghu Reservoir was lower in June, eutrophic in September and moderately eutrophic in October. Some of the sampling points of the East Liaohe River belonged to the middle trophic level and the other part belonged to the eutrophic level. The absorption coefficient of each component of water increased with increasing nutrient level. Besides, the absorption spectra of total suspended particulate of Erlonghu Reservoir in June and October were similar to that of non-algal particles, and chromophoric dissolved organic matter （CDOM） contributed most to the total absorption of water. The absorption spectra of total suspended particulate matter in September were similar to that of phytoplankton and phytoplanktonwas the dominant contributor to the total absorption. For samples of Erlonghu Reservoir in June and September, aph（440） and total phosphorus （TP） were correlated closely with each other. Signifi- cant correlation between aph（440） and dissolved organic carbon （DOC） of Erlonghu Reservoir in June was observed, while ad（440） was only correlated with Chla. There were positive correlations between %h（675） and Chla, Carlson index （TLI） in Erlonghu Reservoir （September） and East Liaohe River. Obvious differences of water optical properties were found between river and lake lo- cated in the East Liaohe River basin as follows：