基于包络线法的滨海滩涂PLSR盐分模型研究  

Study on the PLSR Salt Content Model of Coastal Shoals Based on Enveloping Line Method

作　　者：李微[1,2] 李媛媛 田彦[4] 刘远[1,2] 刘长发[1,2] 郭锡杰[1] 牟蒙 

机构地区：[1]大连海洋大学海洋科技与环境学院,辽宁大连116023 [2]近岸海洋环境科学与技术辽宁省高校重点实验室,辽宁大连116023 [3]山东正元航空遥感技术有限公司,山东济南250000 [4]朔州职业技术学院,山西朔州036002

出　　处：《海洋科学进展》2014年第4期501-507,共7页Advances in Marine Science

基　　金：武汉大学测绘遥感信息工程国家重点实验室开放基金项目--基于高光谱遥感的辽河三角洲滨海盐碱地盐渍化程度定量反演研究(10R03);海洋公益性行业科研专项项目--典型海湾生境与重要经济生物资源修复技术集成及示范(200805069);海洋公益性行业科研专项--辽东湾受损生境修复生态工程和效果评价技术集成与示范(201305043-1)

摘　　要：以辽河三角洲滨海湿地滩涂为研究区域,首先利用8种常用光谱变换方法和包络线法进行光谱特征分析,发现光谱数据经包络线法去包络后与盐分含量的相关性显著提高,并确定其对盐分敏感的最佳波段,利用PLSR建立敏感波段的土壤盐分反演模型。研究表明,模型由于保留了对土壤含盐量贡献大的波段,反演精度较高,同时减少了计算量。In order to protect the coastal wetland environment, it is of vital importance to timely and accu- rately monitor the coastal shoals salinization. Hyperspectral remote sensing is regarded as an advanced technology to monitor soil salt content. In this paper, taking the Liaohe River Delta beach as the study area, we analyzed the soil spectral characteristics based on the eight kinds of common spectral transformation methods and the improved enveloping line method. It＇s found that the spectral data processed by the improved enveloping line method showed a higher correlation with the soil salt content. The optimal bands for the salt content retrieval were determined accordingly, and used to develop the soil salt content retriev- al model based on PLSR. The results showed that the retrieval accuracy was improved with the calculation burden reduced. Therefore, the model is effective to predict the degree of coastal shoals salinization with hyperspectral data.

关 键 词：土壤盐分 高光谱 偏最小二乘法(PLSR) 定量反演 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]