Dryland agriculture produces agricultural commodities in the food and plantation sectors. However, the potential for dryland agriculture in Indonesia is one of the agricultural bases, which is also threatened by climate anomalies. This research aims to examine one of the climatic factors, namely Land Surface Temperature (LST), which is influenced by environmental carrying capacity factors, namely the vegetation index on the productivity of dryland agriculture. The vegetation indexes used are NDVI, SAVI, and EVI, using Landsat 5 TM and Landsat 8 OLI imagery for 1999, 2004, 2009, 2014, and 2019 then analyzed by statistical regression tests. Another data used are temperature comparison data from the Meteorological Climatological and Geophysical Agency of Indonesia as known as Badan Meteorologi Klimatologi dan Geofisika (BMKG), agricultural productivity data from Statistics Indonesia as known as Badan Pusat Statistik (BPS), and Agricultural Counseling Agency of Nangapanda District as known as Badan Penyuluhan Pertanian (BPP). The result obtained from this research is that there is a significant inverse relationship between the vegetation index and LST. Later, the increase in LST can cause a decrease in the productivity of dryland agriculture.

Cempaka Tropical Cyclone (TC) occurred on November 27, 2017, at the Indian Ocean and induced high rainfall leading to flooding in the southern part of Java island. One of the most affected areas is the karst landscape of Gunung Sewu. This study aims to identify flood inundated areas caused by the Cempaka TC in the Gunung Sewu karst landscape through satellite imagery of Sentinel 1B. Sentinel 1B imageries were used to extract the flood inundation area through the processing of random forest (RF) and the thresholding value (TV). A significant difference in flood inundated area was obtained between RF and TV, where RF shows a result of 526.07 ha of the total inundated area while the TV shows a result of 105.46 ha. However, both methods show the same sequence for three regencies with the highest total flood inundated area (Gunungkidul, Pacitan, and Wonogiri) and show the same range of each flood inundated area (0-0.5 ha). This distribution of flood inundated area can be used by policymakers as a basis for spatial planning in Gunung Sewu karst landscape.

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Pertumbuhan ekonomi yang tinggi di Jakarta diiringi dengan pertambahan jumlah penduduk dan pembangunan infrastruktur yang semakin padat. Tingginya tingkat pembangunan infrastruktur di Jakarta menyebabkan semakin berkurangnya tutupan vegetasi dan terganggunya fungsi alami ekosistem yang semula ada di Jakarta, seperti fungsi sistem hidrologi. Pembangunan fisik dan infrastruktur di daerah perkotaan seharusnya diimbangi dengan pengelolaan lingkungan yang seimbang sehingga dampak negatif yang timbul dapat diminimalkan. Salah satu bentuk pengelolaan lingkungan dapat dilakukan dengan pengaturan dan pemanfaatan ruang yang optimal sehingga fungsi ekosistem tetap terjaga. Studi ini bertujuan untuk menganalisis bagaimana hubungan perubahan tutupan lahan terhadap sistem hidrologi yang dilihat dari persediaan air dan fenomena banjir di Jakarta, serta menyiapkan rekomendasi untuk perencanaan ruang berbasis sistem hidrologi. Analisis dilakukan secara kuantitatif dengan bantuan Sistem Informasi Geografis, berdasarkan data sekunder dan studi literatur. Berdasarkan pengolahan citra Landsat tahun 1999-2019, tutupan lahan bervegetasi di Jakarta mengalami penurunan dari 35,5% menjadi 6,4%, sementara luas lahan terbangun terus mengalami peningkatan dari 65,5% menjadi 93,6%. Kepadatan bangunan di Jakarta menyebabkan peningkatan luas permukaan tanah yang bersifat impervious sehingga terjadi peningkatan laju aliran air permukaan dan penurunan laju aliran dasar di bawah tanah yang memicu terjadinya banjir.