CAJ | 학술논문

悬浮颗粒物粒径分布特征为水环境结构与功能研究提供了重要信息，但目前针对内陆湖泊的研究还很少。依据2008年-2011年鄱阳湖丰枯水期实测数据，对悬浮颗粒物粒径分布的时空特征及光学特性进行了研究。鄱阳湖悬浮颗粒物粒径具有季节性变化特点：枯水期南部湖区颗粒物粒径大于北部湖区，而丰水期南北部湖区差异不大。同时，悬浮颗粒物粒径分布对水体吸收系数、衰减系数和散射系数都有影响。鄱阳湖水体总颗粒物吸收系数北部观测值高于南部；颗粒物中值粒径与总颗粒物比吸收系数呈负相关关系，这可能是由浑浊水体中存在的矿物颗粒物打包效应引起。鄱阳湖水体总颗粒物衰减系数和散射系数的时空分布规律相似：枯水期具有明显的区域性差异而丰水期区域性差异不大。遥感反射率、总颗粒物散射系数光谱斜率以及颗粒物粒径分布斜率之间的函数关系为遥感反射率表征粒径分布情况以及定量分析悬浮颗粒物粒径分布特征对遥感反射率的影响提供了依据。悬浮颗粒物粒径分布、颗粒物后向散射概率与颗粒物复折射率密切相关，可以反映鄱阳湖水体悬浮颗粒物组分信息。
현부과립물립경분포특정위수배경결구여공능연구제공료중요신식，단목전침대내륙호박적연구환흔소。의거2008년-2011년파양호봉고수기실측수거，대현부과립물립경분포적시공특정급광학특성진행료연구。파양호현부과립물립경구유계절성변화특점：고수기남부호구과립물립경대우북부호구，이봉수기남북부호구차이불대。동시，현부과립물립경분포대수체흡수계수、쇠감계수화산사계수도유영향。파양호수체총과립물흡수계수북부관측치고우남부；과립물중치립경여총과립물비흡수계수정부상관관계，저가능시유혼탁수체중존재적광물과립물타포효응인기。파양호수체총과립물쇠감계수화산사계수적시공분포규률상사：고수기구유명현적구역성차이이봉수기구역성차이불대。요감반사솔、총과립물산사계수광보사솔이급과립물립경분포사솔지간적함수관계위요감반사솔표정립경분포정황이급정량분석현부과립물립경분포특정대요감반사솔적영향제공료의거。현부과립물립경분포、과립물후향산사개솔여과립물복절사솔밀절상관，가이반영파양호수체현부과립물조분신식。
The suspended particle size distribution provides crucial information for the study of water environment structure and function .Based on the in-situ data from wet and dry season in 2008-2011 ,the paper studied suspended particle size distribution of Poyang Lake and its optical features .The suspended particle size distribution showed seasonal variation:the particle size of southern lake was larger than that of northern lake in dry season but showed little variation in wet season .The suspended parti-cle size distribution exerted influence on particulate absorption coefficient ,attenuation coefficient and scattering coefficient .The particulate absorption coefficient of northern lake was higher than that of southern lake .The negative correlation between specif-ic absorption coefficient of total suspended particles and median particle size indicated that there was“package effect”of mineral particles in turbid Poyang Lake .The spatial and temporal distribution of particulate attenuation coefficient and scattering coeffi-cient are similar:there were obvious regional differences in dry season but few in wet season .There were good correlations a-mong the remote sensing reflectance ,spectra slope of particle size distribution and spectra slope of particulate scattering coeffi-cient .These correlations would provide the foundation for remote sensing retrieval of particle size and quantitative analysis of in-fluence of suspended particle size on the optical properties .The relationship between particle size distribution ,particulate back-scattering coefficient and bulk refractive index can provide information of particle composition in Poyang Lake .