Monitoring of Land Use Changes Using Aerial Photograph and Ikonos Image in Bedugul, Bali

Abstract

There was change of expanding land use in Bedugul, It is necessary to monitor the change of highland of Bali, catchments area of Bcratan, Buyan and Tamblingan lakes. In order to control land use change and to anticipate degradation of hydrology function of this area. This study is to monitor the land use change by remote sensing and GIS technique. To evaluate land use and land cover, aerial photograph imagery and Ikonos imagery were used.Over 22 years of observation (1981 -2003), there \vas land use changes in the calchments area of Bcratan, Buyan and Tamblingan lakes at Bedugul area. The area of settlement increased by 62.6 ha, dry land vegetable crops increased by 7.5 ha, and shrub increased by 26.2 ha. On the other hand, areas of coffee crops and forest decreased by 116.5 ha and 32.5 ha, respectively. The surface area of Buyan Lake was also decreased, due to sedimentation caused by erosion in the vegetables dry land crops. Planning the land use study on erosion and soil-water conservation in this area are necessary, in order to control land use change, erosion, and sedimentation in the lakes

The Holocene environmental changes in southern Indonesia reconstructed from highland caldera lake sediment in Bali Island

“…Possible cultivating indicators of Cucurbitaceae and Arenga (sugar palm) also appeared slightly (less than 1% in each, data not shown), but stable trends of pollen and other proxies suggest that the influence of human settlement and agriculture was not so large as to change littoral environments or water quality of Lake Buyan for the last several thousand years. Nevertheless, the dramatic increase of epipelic Staurosirella pinnata reaching 30% and magnetic susceptibility at topmost 3 cm surfaces might signify artificial littoral soil erosion in recent years (Adnyana et al, 2006).…”

Studi Eutrofikasi Akibat Aktivitas Penggunaan Lahan di Danau Buyan

“…Evaluasi terhadap penggunaan lahan dan aktivitasnya mempertimbangkan satuan unit lahan DTA Danau Buyan, erosi aktual sesuai hasil penelitian Adnyana (2006), hasil sedimen dihitung menurut SCS National Engineering Handbook (DPMA, 1984dalam Asdak, 1995, kehilangan hara diprediksi dengan mengkonversi kandungan Corganik dan hara tanah terhadap hasil sedimen, dan status trofik danau menurut kriteria Peraturan Menteri Lingkungan Hidup Nomor 28 tahun 2009 dan indeks status trofik (TSI) Carlson (1977).…”

“…Penggunaan lahan lainnya berupa budidaya sayur mayur lahan kering seluas 512,1 ha (26,4%) dan semak belukar seluas 43,0 ha (2,2%) (Adnyana, 2006 dan hasil analisis) seperti Tabel 1. Aktivitas penggunaan lahan di lokasi penelitian seperti Tabel 2.…”

Sensoriamento remoto aplicado ao estudo da vegetação com ênfase em índice de vegetação e métricas da paisagem

“…A aquisição de imagens de satélite de alta ou altíssima resolução espacial é limitada a poucos usuários; devido aos altos custos, seu uso é pouco difundido e geralmente restrito a escalas locais. Alguns exemplos de aplicações encontrados em literatura referem-se à utilização dessas imagens não só para mapeamento (FURRER et al, 1994;ADNYANA et al, 2006;SANTOS et al, 2011) como também para monitoramento de danos florestais (EKSTRAND, 1994), estimativas da estrutura da floresta e suas espécies (ST-ONGE;CAVAYAS, 1997;FRANKLIN et al, 2000), discriminação de árvores individuais (FRANKLIN, 1994;KEY et al, 2001;GOODWIN et al, 2005), comparação de índices de área foliar com parâmetros da imagem (COLOMBO et al, 2003), como ferramenta para o manejo (WULDER et al, 2004) e recuperação de ecossistemas (LUZ, 2002).…”