黄浦江不同水质指标的光谱响应模型比较研究

对黄浦江全河段进行了光谱反射率和典型水质参数的同步测量,测量的水质参数包括总磷(TP)、总氮(TN)、溶解氧(DO值)、高锰酸盐指数(CODMn)、化学需氧量(CODC r)、五日生化需氧量(BOD5)、悬浮物浓度(TSS)、浊度(Turb)和氨氮(NH3-N)共9个水质指标,分析了9个水质指标之间的相关关系.研究了单波段归一化反射率与各水质指标的线性关系模型.结果表明,单波段光谱反射率与除氨氮和化学需氧量2个水质指标之外的其余7个水质指标有较好的相关关系,光谱反射率的比值与水质指标的相关性得到一定提高,与氨氮和化学需氧量2个水质指标的相关系数也大于0.5.

STUDY ON THE SPECTRAL REFLECTIVITY MODELS OF DIFFERENT WATER QUALITY PARAMETERS IN HUANGPU RIVER

For Huangpu river,spectral reflectivities were measured synchronously with typical water quality parameters,including total phosphor(TP),total nitrogen(TN),dissolved oxygen(DO),chemical oxygen demand with potassium permanganate(COD_(Mn)),chemical oxygen demand with cadmium(COD_(Cr)),biochemical oxygen demand(BOD_5),total suspended sediments(TSS),ammoniac nitrogen(NH_3-N) and turbidity degree(Turb).Relationships between the nine water quality parameters were analyzed.The linear relationship models were studied between water quality parameters and normalized reflectivities.The results show that there are good relationships between the normalized spectral reflectivities and the water quality parameters except for NH_3-N and COD_(Cr).If the normalized spectral reflectivities are replaced by the ratio of spectral reflectivity at different bands,the relativity will be improved,and the correlative coefficients will be more than 0.5 for NH_3-N and COD_(Cr).