文档介绍：用分析模型方法反演水体叶绿素的浓度
第 10卷
第 2期
2006年 3月
遥感学报 J OURNAL OF REMOTE SENSI G N
V o . 10, N o 2 l . M ar , 2006 .
文章编号: 1007 4619( 2006) 02 0169-07 -
用分析模型方法反演水体叶绿素的浓度
李云梅, 黄家柱, 韦玉春, 陆皖宁
( 南京师范大学江苏省地理信息科学重点实验室, 江苏南京 210097)
摘
要:
水体叶绿素浓度是水质评价的一个重要指标。建立水体光学传输的分析模型, 进而用分析模型反演水
体叶绿素浓度, 对于提高遥感反演水质参数的精度和实用性具有重要意义。作者于 2004年 6月初对太湖 18个点位进行了同步水体波谱实测和水体取样分析。由这 18个点位的实测数据, 利用 G ordon模型建立了 R ( 0- )的模拟模型, 并进而用优化函数的方法反演水体叶绿素浓度。反演值与实测值的相关系数达到 0199 当叶绿素浓度高于, 30mg /m 3 时, 反演的相对误差小于 20% 。进而用该模型反演 2005年 7月太湖 7个点位的叶绿素浓度, 反演值与实测值的相关系数为 0194, 其中, 有 6个点位的反演值相对误差小于 60 。% 关键词: 分析模型; 水体; 叶绿素浓度; R ( 0- ) TP701 文献标识码: A 中图分类号:
Inversing Chlorophyll Concentration of Taihu Lake by Analytic M odel
L I Yun-m e, HUANG Jia i -zhu, W E IY u-chun, LU W an-n ing
( Jiang su P rov inc ia lK ey L aboratory of G eograph ic Infor ation S cience, Nanj ing N orma l Un iversity, J iang su, N anjing m 210097, Ch ina )
Abstract Ch lorophyll con centration is an m portan t index for eva luating water qu ality T o make the invers ion : i . of re ote sen sing more accu rate and m ore reality, it is s ign ifican t to bu ild an alyt ic mod el for sm u lat ing water m i R ( 0 ) , and by the analytic m odel to inverse ch lorophyll concen tration. 18 po in ts in T aihu lak e were chosen, and at those po in ts, th e spectra of th ew ater and water ch lorophyll concen tration werem easured at th e sa e tm e m i in June 2004 T he sm u lation mod el o f R ( 0 ) was bu ilt u sing Gordon mode, and the ch lorophyll , . i l concen trat ion was inversed u sing opt m izat ion m ethod. Th e correlat ion of m easu red and inversed R ( 0 ) is i 3 0199. W hen the ch lorophyll concen tration is h igher than 30mg /m , th e relative error of inversed value is less than 20% . Then, th e ch lorophy ll concen trat ion is inversed by th is m odel for seven measu red sa p les in Ju ly m , 2004. The correlat ion ofm easured and inversed R ( 0 ) is 0194. And the relat ive error of the m ajority poin ts is less than 60% . K ey words an