Mangrove Leaf Area Index Estimation Using Sentinel 2A Imagery in Teluk Ratai, Pesawaran Lampung

3rd International Conference of Indonesia Society for Remote Sensing

地球科学;计算机科学

Juniansah, Anwar^1 ; Tama, Galih Candra^1 ; Febriani, Kadek Risna^1 ; Baharain, Muamar Nandika^1 ; Kanekaputra, Tito^1 ; Wulandari, Yuniarsita Setyo^1 ; Kamal, Muhammad^1

Geographic Information Science, Faculty of Geography, Gadjah Mada University Yogyakarta, Indonesia^1

关键词: Accuracy;    Coastal ecosystems;    Comparison;    Correlation analysis;    Enhanced vegetation index;    Leaf Area Index;    Saturation effects;    Vegetation density;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/165/1/012004/pdf
DOI  :  10.1088/1755-1315/165/1/012004

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Mangroves are estuary dominant vegetation in tropic and subtropic area which have an important role to balance the coastal ecosystem. One of the main mangrove biophysics parameters is leaf area index, which is defined as an unitless quantity from the area of one side of the leaf on each unit of ground surface area. LAI measurement using satellite imagery is more efficient than direct measurement because it covers the isolated area in the mangrove forest. This paper discussion focus on mangrove leaf area index estimation model comparison to obtain the best estimation model based on accuracy test value. The imagery used in this research is Sentinel 2A with 10 meters resolution and generic vegetation index (NDVI) compared with nongeneric index vegetation (EVI). Normalized vegetation index is chosen because its sensitivity to chlorophyll tissue of the leaves beside, Enhanced Vegetation Index is chosen because its sensitivity to vegetation canopy structure. The LAI measurement result in Teluk Ratai, Pesawaran, Lampung showing values range from 0.37 until 1.39. The correlation analysis result showing an adequate strong relationship between NDVI and EVI with LAI field measurement value. The correlation value between NDVI and the field measurement value of LAI is 0.779 also the correlation value between EVI and the field measurement value of LAI is 0.762. Based on those value both of vegetation index have a strong relationship with the field measurement result of LAI. From the standard error estimation value, the LAI estimation model accuracy using NDVI is 79.8% and 78.78% using EVI. Visual comparison also done by compare vegetation density pattern in Sentinel 2A with estimation classes in NDVI and EVI model. The best model to estimate leaf area index mangrove is EVI model based on visual comparison, accuracy test, and saturation effect from NDVI.