研究目的
To develop and present cost-effective approaches that rely on observations extracted from a wide range of readily available remote sensing datasets, and procedures that could be applied to vulnerable coastal areas and inland bodies of water worldwide for algal bloom modeling.
研究成果
The developed methodologies are advantageous for their reliance on readily available global remote sensing datasets, cost-effectiveness, and ability to predict algal bloom occurrences. The hybrid model significantly improved prediction accuracy by focusing separately on temporal and spatial distribution conditions.
研究不足
The main constraints are related to the spatial and temporal resolution of the remote sensing digital datasets used. Algal blooms smaller than the picture elements of digital products or those occurring and vanishing within the acquisition period of two consecutive satellite images will not be detected. Adverse weather conditions can degrade the quality of remote sensing datasets.
1:Experimental Design and Method Selection
The study adopted a fivefold methodology involving the generation of a database incorporating relevant coregistered remote sensing datasets and derived products, compilation of an inventory of known locations of algal blooms, investigation of factors controlling algal bloom occurrences, construction and validation of MR and ANN models, and adoption of a two-step modeling approach (temporal model followed by spatial model) to improve prediction accuracy.
2:Sample Selection and Data Sources
The study utilized remote sensing datasets from MODIS, TRMM, and QuikSCAT, and field data provided by the Kuwait Institute for Scientific Research (KISR).
3:List of Experimental Equipment and Materials
Software: SeaDAS 6.4, ENVI 4.8, ArcGIS 10.1, Minitab 16, Matlab R2013a. Satellite data: Aqua-MODIS, TRMM, QuikSCAT.
4:Experimental Procedures and Operational Workflow
The methodology involved data preprocessing, model construction using training data subsets, and model validation using testing subsets. The hybrid model combined temporal and spatial submodels for improved accuracy.
5:Data Analysis Methods
The study used ROC curves to assess model performance, with AUC values indicating the quality of forecast systems.
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