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Remote sensing for Mapping TSM concentration in Mahakam Delta: an analytical approach

Budhiman, S. and Hobma, T. W. and Vekerdy, Zoltán (2004) Remote sensing for Mapping TSM concentration in Mahakam Delta: an analytical approach. In: 13th OMISAR Workshop on Validation and Application of Satellite Data for Marine Resources Conservation, 2004.10.05-2004.10.09., Bali, Indonézia.

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Abstract

The Indonesian coastal zones have always been under heavy pressures, including those from fisheries, oil industries and sea transportation. The presence of these activities carry a large portion of risk in damaging the environment as well as in destroying the marine resources, leading to the need for an integrated management approach based on an environmental information system that is comprehensive and multi-disciplinary in nature. The Mahakam Delta has the same general problems as other coastal regions in Indonesia. The method is based on bio optical modeling. The forward water analysis comprised the laboratory measurements of water quality (TSM and Chl) and Inherent Optical Properties (IOPs) to derive Spesific Inherent Optical properties (SIOPs). SIOPs (of water, TSM, Chl and CDOM), coefficient f and B were used to developed R(0-) model. The inverse atmosphere analysis comprised the image preprocessing (i.e. geometric correction, atmospheric correction, air-water interface correction). The last step is inverse water analysis, which comprised the development of algorithm and image processing to develop TSM concentration maps. The spectrometer measurements collected in the field were used for obtaining the subsurface irradiance reflectance. The subsurface irradiance reflectance R(0-) is the ratio of upwelling (Ewu) and downwelling irradiance (Ewd) just beneath the water surface. There are some discrepancies from matching R(0-) model and R(0-) measured in the field, especially in the blue region and NIR region. The reason of the discrepancies could be due to the fact that the Q factor (the angular distribution factor of spectral radiance) is still not understood completely. This model is very susceptible to the decrease of the proportional factor f, and to the increase of the backscattering probability B. The results indicates that red band of satellite sensor is sensitive to detect higher TSM concentration. For Mahakam Delta, red band algorithm was used to derive TSM map, since higher TSM concentration occurred in the delta.

Item Type: Conference or Workshop Item (Paper)
Subjects: G Geography. Anthropology. Recreation / földrajz, antropológia, kikapcsolódás > GA Mathematical geography. Cartography / földméréstan, geodézia, térképészet
Depositing User: Erika Bilicsi
Date Deposited: 10 Jul 2013 13:04
Last Modified: 10 Jul 2013 13:04
URI: http://real.mtak.hu/id/eprint/5876

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