Judul: Study of Green Open Space's Development as a Mitigation of Urban Heat Island in Depok Cityscape, West Java
Abstrak: Depok City is a one of Satelit’s Jakarta which had its own problematique that related to green open space’s transisitions to built up area as a consequency of population’s increasingly throughout urbanization. Therefore, study about development of green open space (GOS) at any landscape typologi should be held holistically that implicate citizens, local government, and stakeholders, so the enhancement of UHI intensity could be prevented as soon as possible. GOS developments at private and public area are also should be appropriate to Rencana Tata Ruang Wilayah (RTRW) on between 2012 and 2032. The symptom of UHI intensity could be detected by using Landsat 7 ETM+ and Landsat 8 OLI-TIRS mechanism on path 122 and row 64 which showed us the degradation of vegetation area since 2016 till 2021. On 2011, vegetation’s commodious of the city is 44,86%; 33,98% on 2016; and then decrease to 29,20% on 2021. In otherwise, the extended of built up area increase significantly on the same time. The result report that built up area’s commodious on 2016 is 17,80%; 29,59% on 2016; and then 37,03% on 2021. This transition is also making vegetation area which had high density to very high density decrease revelatory on between 2011 and 2021. The high density vegetation on 2011 is 1549,64 ha; but unfortunately it was decrease to 917,34 ha on 2016; and redecrease to 698,25 ha on 2021. On the same moment, very high density vegetation had also decreasing continously from 2.184,71 ha on 2011; 2.086;92 ha on 2016; and 1.199,42 ha on 2021. The diminish of vegetations had caused by the escalation of Land Surface Temperature (LST), and city temperature revelatory. Every alleviation of 1,76 ha GOS can improve LST till 0,11ºC, and city temperature till 0,17ºC. As we know, the percentage of LST which had range 27ºC until more than 33ºC is 5,59% on 2011; then rising revelatory till 15,04% on 2016; and 27,97% on 2021. The highest priority of GOS’s development would be applied at any sub-districts that gain highest class of UHI intensity (4th class), such as Beji, Cimanggis, Cipayung, Pancoran Mas, and Sukmajaya which had high density of built up area. The application of GOS’s development through inculcation of plants which having high density canopy in many stratification should be applied, so the surface temperature of the city could be decreased 1,04ºC and the average temperature of whole city would be repaired to 1,61ºC.
Keyword: green open space, Landsat 8, land surface temperature, urban heat island, Landsat 7

Judul: Determination of Green Open Space Priority based on Urban Heat Island in Bandar Lampung Area
Abstrak: Tingginya laju urbanisasi yang didorong oleh meningkatnya populasi penduduk tiap tahun, terjadi di wilayah Kota Bandar Lampung. Peningkatan populasi tersebut akan berdampak pada konversi lahan kawasan vegetasi menjadi lahan pemukiman. Ketidakseimbangan antara kawasan vegetasi dan pemukiman, akan memengaruhi perubahan suhu yang memicu pertumbuhan Urban Heat Island (UHI). Penelitian bertujuan memberikan rekomendasi lokasi prioritas dalam pengembangan ruang terbuka hijau sebagai upaya mengurangi efek fenomena UHI. Metode yang digunakan bersifat kuantitatif-deduktif menggunakan analisis remote sensing dari citra Landsat 8. Hasil analisis spasial dari penentuan prioritas ruang terbuka hijau menunjukkan nilai NDVI sebagai aspek biologis yang cenderung tinggi pada wilayah sekitar urban sebesar 0,51-0,82 di tahun 2021. Aspek fisik yang dilihat dari Land Surface Temperature yang mengalami peningkatan sebesar 0,8 °C di tahun 2015 menuju 2018, penurunan sebesar 2,6 °C di tahun 2018 menuju 2021. Aspek sosial dilihat dari pertambahan penduduk yang meningkat sebesar 2,16% selama 7 tahun. Hasil penggabungan antara 3 aspek biologis yaitu NDVI, fisik yaitu LST, dan sosial yaitu kepadatan penduduk menghasilkan nilai MOORA tertinggi sebesar 7,2%, menunjukkan wilayah prioritas utama penambahan RTH sebesar 415 Ha terletak di Kecamatan Tanjung Karang Timur., The high urbanisation rate, driven by the increasing population every year, occurs in the Bandar Lampung City area. The increase in population will impact the conversion of vegetated area into residential area. The imbalance between vegetation and the residential regions will affect temperature stability which triggers the growth of Urban Heat Island (UHI). This study aims to determinate the priority locations in the development of green open spaces as an effort to reduce the effect of the UHI phenomenon. This study delivers spatial information related to the UHI phenomenon. The research method is deductive-quantitative using remote sensing analysis from Landsat 8 imagery. The spatial analysis results of the determination of green open space priorities show that the NDVI value as a biological aspect tends to be high in urban, from 0.51-0.82 in 2021. The physical part of the Land Surface Temperature has increased by 0,8°C from 2015 to 2018, and decreased by 2,6°C from 2018 to 2021. The social aspect looked at population growth with an increase of 2.16% for seven years. Combining these three aspects, NDVI as a biological aspect, LST as a physical aspect, and population growth as a social aspect get results in the highest score of MOORA with the value of 7,2% in the main priority areas for the addition of 415 Ha of green open spaces is located in the Tanjung Karang Timur District.
Keyword: population density, vegetation density, urban heat island, green open space, land surface temperature

Judul: Mud Crab’s (Scylla serrata Forskal 1775) Response to Different Decaying Level of Gold Snail (Pomacea canaliculata Lamarck 1822) Bait.
Abstrak: Mud crab is well known as omnivorous-vigorous-voracious-opportunistic-scavenger. These intertidal animals applies mainly chemoreception in their predatory behaviour. It has been commonly assumed that non fresh gold snail bait is better than fresh bait in stimulating the mud crab. This research's aim is to analyze mud crab response to different decaying level of gold snail bait. Their response were observed as time required to touch the bait and pattern and direction of the mud crab in approaching the baits. The different decaying level of gold snail baits were shown on Total Volatile Base Nitrogen (TVBN) as 16.3 mg/100g (0 day); 534.1 mg/100g (3 days); and 887.4 mg/100g (6 days). The research was conducted from July 2009 until February 2011. The TVBN test for gold snail baits were conducted at Laboratory of BBPPHP Jakarta. The experiment was conducted in Pemalang. The result showed that the average period of mud crabs to touch the baits were 52.14 minutes; 61.57 minutes and 52.57 minutes. Anova test concluded no sufficient evidence of significant effect of TVBN content of gold snail bait on mud crab’s feeding behaviour. Movement pattern B, i.e. left and right deviation followed by straight forward movement to the bait, was commonly exhibited by the crabs. Consequences of time period required by the mud crab to approach the bait on fishing operation is discussed.
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