Abstract
Monitoring land cover change is important to be done in order to understand changing mechanism and to model impacts of the change to environment and ecosystem in different scale. Research on change detection of the Tondano watershed for the period of 1989-1999 showed that the land cover has changed due to agricultural activity and urbanization (Prenzel, et al, 2006). Land cover change of the Tondano Watershed contributed to the flooding and landslide disasters in Minahasa and Manado in the early of 2014. This research was conducted to compare land cover of the Tondano Watershed between the period of 2002 and 2015 using remote sensing data and Geographical Information System (GIS). Change detection method, post classification comparison was used to gather information on land cover change in the Tondano Watershed. Results showed that there was a significant change in the land cover within thirteen years. There was a decrease of forest, paddy field and volcano areas and an increase of agriculture, residential and water body areas. Forest has been converted to dry land agriculture; paddy field area has been converted to agriculture and residential areas. An increase of residential area was caused by conversion of agricultural and paddy field areas located nearby Manado City.
Highlights
Perubahan tutupan lahan menjadi salah satu perhatian utama dalam monitoring lingkungan
important to be done in order to understand changing mechanism
Research on change detection of the Tondano watershed for the period
Summary
Perubahan tutupan lahan menjadi salah satu perhatian utama dalam monitoring lingkungan. Metode umum yang digunakan untuk mendapatkan informasi tutupan lahan yaitu dengan survey lapang dan menggunakan data penginderaan jauh. Karena analisis perubahan tutupan lahan ini membutuhkan pengambilan data yang repetitif, citra pengideraan jauh yang berasal dari Enhanced Thematic Mapper/Thematic Mapper (ETM/TM), Satellite Probatoire d’Observation de la Terre (SPOT), radar dan Advanced Very High Resolution Radiometer (AVHRR) menjadi sumber data utama untuk analisis dalam beberapa dekade terakhir (Lu et al, 2004). Berbagai penelitian telah dilakukan dengan menggunakan metode ini diantaranya oleh Rymasheuskaya (2007) membandingkan metode postclassification comparison dengan image differencing untuk mempelajari perubahan tutupan lahan di wilayah Utara Belarus. Studi perubahan lahan periode waktu 1990 dan 1999 di wilayah DAS Tondano, Sulawesi Utara telah dilakukan oleh Prenzel et al (2006) dengan menggunakan hybrid change method oleh Jensen (2007). Penelitian ini bertujuan mendeteksi perubahan tutupan lahan tahun 2002 dan tahun 2015 dengan menggunakan data penginderaan jauh dan Sistem Informasi Geografis
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