基于MODIS影像的射阳河口海域可溶性无机氮磷营养盐浓度遥感监测研究  

Research on monitoring the concentration of dissolved inorganic nitrogen and dissolved inorganic phosphorus near Sheyang Estuary based on MODIS

作　　者：许勇[1,2] 成长春[2] 张鹰[3] 张东[3] 

机构地区：[1]盐城师范学院城市与资源环境学院,江苏盐城224002 [2]江苏沿海开发研究院盐城师范学院,江苏盐城224002 [3]南京师范大学地理科学学院,江苏南京210046

出　　处：《海洋通报》2012年第6期700-706,共7页Marine Science Bulletin

基　　金：国家自然科学基金(41071083);江苏省高校自然科学研究面上项目(11KJB170010);盐城师范学院教授;博士基金(10YSYJB0207)

摘　　要：分析了射阳河口海域实测光谱反射率与DIN、DIP浓度间的相关性,发现DIN、DIP浓度与水体浊度间呈强烈的正相关,说明在该海域DIN和DIP主要来源于沉积物再悬浮过程中的释放。在此基础上以实测光谱模拟MODIS前四个波段的反射率,建立了基于MODIS影像的DIN、DIP浓度定量反演模型,模型的相对预测精度达到60%以上,将模型应用于影像反演所得的结果与实际情况相当吻合,证明了模型的实际应用价值和业务化潜力。In this paper,the correlations between the in-situ spectrum and the synchronous concentration of DIN and DIP collected in Sheyang Estuary were calculated. The results showed that DIN and DIP concentration had strong positive correlation with the turbidity of water in this sea area. It indicated that DIN and DIP in this sea area were mainly originated from the sediment resuspension in normal status. The spectrums of MODIS simulated from the in-situ spectrums were used to establish the retrieving model. The relative accuracy of the model was exceeding 60 %. The distribution of DIN and DIP concentration retrieved by the model was consistent well with the real conditions. These prove the applicable and operable value of the model.

关 键 词：DIN浓度 DIP浓度 MODIS 射阳河口 反演模型 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]