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Fish habitat mapping in Tonle Sap Great Lake using remote sensing and geographic information system | |
Author | Heng Suthy |
Call Number | AIT Thesis no.RS-06-20 |
Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science |
Publisher | Asian Institute of Technology |
Abstract | The aim of this study is focused on seasonal potential mapping of fish habitat and understanding the lake environment, especially ecology and generating the multi-temporal flood maps by MODIS data. Algorithms for calibrated Surface Water Temperature (SWT) and estimated Water Depth Temperature (WDT) using satellite imagery were developed and validation was carried out with the actual dataset. Some dataset such as water quality parameters, land use changes, agricultural management surrounding the lake, topography, existing flooded data with NDVI, True color composite of the 16-day composites MODIS imageries, meteorology, social conditions, flood cover and polluted locations were used to extract the physical condition of the lake environment as well as annual flood mapping. By integration of these aspects, the understanding of the lake environment can be defined. Finally, the seasonal fish habitat mappings were generated. The validation with chemical water quality parameters and fishing lot data were integrated. Additionally, the sensitivity analyses on the fish habitat area by using water quality parameters have been integrated to reach higher accuracy. In addition, the daily MODIS image with the actual SWT and WDT have been successfully used to generate the algorithms in order to obtain the calibrated SWT and estimated WDT from remotely sensed data. Finally, the results show that the adopted methodology was efficient in achieving the research objectives. Use of 16-day composite of MODIS images is a good technique for extraction of flood map. Also, it was found that the lake environment is facing with high sedimentation in wet season as well as pollution especially, reduction amount of Dissolve Oxygen (DO) in dry season. The degradation of natural vegetation covers and poor management leads to decreasing of aquatic production in the lake. In additions, the study reveals that the use of multi-criteria analysis along with GIS and remote sensing yields, mapping of potential fish habitats which will be very useful in future planning of fishery. Successful algorithms generated for calibrated SWT through remote sensing imagery show that, the calibrated SWT can be apparently used as WDT |
Year | 2006 |
Corresponding Series Added Entry | Fishes--Habitat--Remote sensing--Cambodia--Tonle Sap;Geographic informationsystems--Cambodia--Tonle Sap |
Type | Thesis |
School | School of Engineering and Technology (SET) |
Department | Department of Information and Communications Technologies (DICT) |
Academic Program/FoS | Remote Sensing (RS) |
Chairperson(s) | Susaki, Junichi |
Examination Committee(s) | Tripathi, Nitin K.;Hazarika, Manzul K. |
Scholarship Donor(s) | Government of Japan |
Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2006 |