Title

遥感技术在河口颗粒态总磷分布及扩散研究中的应用初探

Translated Titles

Preliminary Study of Concentration Distribution of Total Particulate Phosphorus in Estuary by Remote Sensing Technology

Authors

张霄宇(Xiao-Yu Zhang);林以安(Yi-An Lin);唐仁友(Ren-You Tang);潘德炉(De-Lu Pan);王迪峰(Di-Feng Wang);龚芳(Fang Gong)

Key Words

长江口近海 ; SeaWiFS ; 模型 ; 悬浮物 ; 颗粒态总磷 ; Changjiang Estuary ; SeaWiFS ; moldel ; suspended sediment ; total particulate phosphorus

PublicationName

海洋學報

Volume or Term/Year and Month of Publication

27卷1期(2005 / 01 / 01)

Page #

51 - 56

Content Language

簡體中文

Chinese Abstract

以美国SeaStar卫星装载的SeaWiFS海洋水色遥感传感器作为遥感数据源,与测了光谱、海表温度、悬浮物含量、透明度、叶绿素浓度、颗粒态总磷含量等,建立了传感器悬浮物含量和颗粒态总磷含量的遥感信息提取模式,结果表明:(1)利用遥感技术估算的海水悬浮物的平均相对偏差为18.1%;(2)悬浮物在遥感图象上的分布和扩散趋势与实际吻合,并且在一定程度上反映了区域内海流运移路径;(3)颗粒态总磷含量在长江河口和杭州湾附近海域较高,由近岸向远岸迅速降低,与实际分布相符;(4)模型主要适用于河口等悬浮物含量高的Ⅱ类水休,对于以浮游植物为主的Ⅰ类水体应另外建立模式。

English Abstract

The SeaWiFS loaded on SEASTAR is used as remote sensing data source. With the in-situ data of suspended sediment concentration (SSC) and total particulate phosphorus (TPP), and inverse regression equation, which suggests the exponential relationship between in-situ suspended sediment concentration data and in-situ radiance data, is employed: y(subscript ssc)=0.382 6exp[4.9748(R670/R555)], r^2=0.9179. Meanwhile the concentration of particulate phosphorus can be obtained by the following algorithm: y(subscript TPP)=0.0076x(subscript ssc)+0.1599, r^2=0.720. So the distributive characteristics of suspended sediments and particulate phosphorus in the Changjiang River Estuary and nearshore were retrived through satelite data. The result suggests that (1) the retrieved concentration distribution accords with the ground trouth, and reflects the actual transport path of ocean current to some extent; (2) the concentration of TPP declines gradually from inshore to offshore; and (3) the algorithm is only applicable for Case Ⅱ water, not for Case Ⅰ water.

Topic Category 基礎與應用科學 > 海洋科學