Hasil Pencarian  ::  Simpan CSV :: Kembali

"The main effect of logging is to create an artificial disturbance regime resulting in canopy gaps and disturbance to soil, seedlings and the forest understory. The effects of logging on the physical environment of a lowland dipterocarp forest in Central Kalimantan are being investigated. A range of approaches are being applied to characterize these impacts. The effect of logging on cnopy cover, seedling density and soil disturbance are recorded to produce low resolution maps of the plots before and after logging. More detailed information about changes in canopy structure is determined using image analysis of hemispherical canopy photographs. "

"Hutan Kota Ciganjur, Jakarta Selatan merupakan hutan kota yang dikelola oleh pemerintah daerah sebagai ruang terbuka hijau yang bermanfaat untuk lingkungan dan masyarakat. Penelitian ini bertujuan untuk menganalisis dinamika fluks emisi gas karbon dioksida tanah pada perbedaan persentase tutupan kanopi vegetasi di Ekosistem Hutan Kota Ciganjur dan menganalisis hubungan antara suhu tanah, suhu udara, kelembaban tanah, dan pH tanah dengan fluks emisi gas karbon dioksida tanah. Pengambilan sampel dilakukan pada bulan September-November 2023. Sampel gas karbon dioksida diambil menggunakan metode Chamber-based pada tiga stasiun dengan persentase tutupan kanopi vegetasi yang berbeda, yaitu stasiun tutupan terbuka T1 (0%-30%), stasiun tutupan sedang T2 (31%-60%), dan stasiun tutupan tertutup T3 (61%-100%). Sampel gas yang diperoleh dikirim ke Laboratorium GRK BSIP, Pati untuk diukur. Pengukuran parameter lingkungan dilakukan langsung dilapangan. Hasil emisi gas yang diperoleh pada masing-masing tutupan terbuka, sedang, dan tertutup adalah 6,87 g CO2/m-2 hari-1, 2,57 g CO2/m-2 hari-1, dan 3,21 g CO2/m-2 hari-1. Hasil dari analisis Kruskal-Wallis menunjukkan tidak terdapat perbedaan signifikan antara tutupan kanopi vegetasi berbeda dengan fluks emisi gas karbondioksida (H hitung = 1,921; x2 tabel = 5,991). Hal ini dikarenakan terdapat faktor lain seperti suhu dan tanah, kelembapan, dan pH tanah yang mempengaruhi. Hasil analisis korelasi Spearman-rho menunjukkan terdapat korelasi dengan arah positif pada suhu udara (r = 0,28) dan pH (r = 0,34) terhadap fluks emisi gas karbon dioksida. Sebaliknya, tidak terdapat korelasi antara suhu tanah (r = 0,16) dan kelembapan (r = -0,10) terhadap fluks emisi gas karbon dioksida (rho tabel = 0,226; signifikansi = 0,05).

---

Ciganjur Urban Forest, South Jakarta is a urban forest managed by the local government as a green open space that is beneficial for the environment and society. The aims of this research were to to analyze the dynamics of soil carbon dioxide gas emission flux at different percentages of vegetation canopy cover in Ciganjur Urban Forest Ecosystem and analyze the relationship between soil temperature, air temperature, soil moisture and soil pH with soil carbon dioxide gas emission flux. Sampling was carried out in September-November 2023. Carbon dioxide gas samples were taken using the Chamber-Based method at three stations, namely open cover station T1 (0%-30%), medium cover T2 (31%-60%), and closed cover T3 (61%-100%). Environmental parameter measurements are carried out directly in the field. The gas emission results obtained for each open, medium and closed cover were 6,87 g CO2/m-2 day-1, 2,57 g CO2/m-2 day-1, and 3,21 g CO2/m-2 day-1. Results of Kruskal-Wallis analysis showed that there was no significant difference between different vegetation canopy cover and carbon dioxide gas emission flux (H calculated = 1,921; x2 table = 5.991). The differences are not significant because of the factors of air and soil temperature, moisture, and pH. Spearman-rho correlation analysis show a positive correlation between air temperature (r = 0,28) and pH (r = 0,34) on the carbon dioxide gas emission flux, but there is no correlation between soil temperature (r = 0,16) and moisture (r = -0,10) on carbon dioxide gas emission flux (rho table = 0,226; sig = 0,05)."

"Hutan kota di Jakarta memiliki peran penting dalam mengurangi dampak negatif pemanasan global dengan menyerap emisi gas karbon dioksida (CO2) atmosfer yang dihasilkan dari aktivitas antropogenik manusia dan menyimpannya di dalam tanah. Penelitian ini bertujuan untuk menganalisis dinamika fluks emisi CO2 tanah pada perbedaan persentase tutupan kanopi vegetasi di Ekosistem Hutan Kota Cijantung, Jakarta Timur dan menganalisis hubungan antara suhu udara, suhu tanah, kelembapan tanah, dan derajat keasaman (pH) tanah dengan fluks emisi CO2 tanah. Metode penelitian melibatkan penggunaan Chamber-Based untuk mengambil CO2 tanah, yang kemudian diukur menggunakan Gas Chromatograph Shimadzu 2014. Chamber ditempatkan pada tiga kondisi stasiun: tutupan kanopi vegetasi terbuka (0%–30%), setengah terbuka (31%–60%) dan tertutup (61%–100%). Pengukuran parameter lingkungan dilakukan untuk setiap lokasi pengambilan emisi CO2 tanah dan dianalisis korelasinya menggunakan Spearman-rho. Hasil penelitian menunjukkan rata-rata fluks emisi CO2 tanah di stasiun setengah terbuka (1,443–5,050 g CO2 m-2hari-1) lebih besar daripada stasiun terbuka (0,747–3,376 g CO2 m-2hari-1) dan tertutup (1,243–2,518 g CO2 m-2hari-1). Namun, ketika dianalisis menggunakan uji Kruskal-Wallis tidak terdapat perbedaan signifikan antara fluks emisi CO2 tanah terhadap persentase tutupan kanopi vegetasi (0%–30%), (31%–60%) dan (61%–100%). Terdapat hubungan antara suhu tanah (r = -0,263) dan pH tanah (r = 0,233) dengan fluks emisi CO2 tanah, sedangkan suhu udara (r = -0,082) dan kelembapan tanah (r = -0,195) tidak memiliki hubungan dengan fluks emisi CO2 tanah. Hasil ini menyoroti kompleksitas interaksi antara faktor-faktor lingkungan dan aliran emisi gas CO2 tanah di Hutan Kota.

---

Urban forests in Jakarta play a crucial role in mitigating the negative impacts of global warming by absorbing atmospheric CO2 emissions from anthropogenic activities and storing them in the soil. This study aims to analyze the dynamics of soil CO2 emission fluxes based on varying percentages of canopy cover in the Cijantung Urban Forest Ecosystem, East Jakarta, and to examine the relationships between air temperature, soil temperature, soil moisture, and soil pH with soil CO2 emission fluxes. The research methodology involved using a Chamber-Based method to collect soil CO2, which was then measured using a Shimadzu 2014 Gas Chromatograph. Chambers were placed in three station conditions: open canopy cover (0%–30%), semi-open (31%–60%), and closed (61%–100%). Environmental parameters were measured at each CO2 emission sampling location, and their correlations were analyzed using Spearman-rho correlation analysis. The results showed that the average soil CO2 emission flux at the semi-open (1.443–5.050 g CO2 m-2day-1) was higher than at the open (0.747–3.376 g CO2 m-2day-1) and closed (1.243–2.518 g CO2 m-2day-1). However, the Kruskal-Wallis test revealed no significant differences between soil CO2 emission flux and vegetation canopy cover percentage (0%–30%), (31%–60%) and (61%–100%). Soil temperature (r = -0.263) and soil pH (r = 0.233) were related to soil CO2 emission flux, while air temperature (r = -0.082) and soil moisture (r = -0.195) were not. These results highlight the complexity of interactions between environmental factors and soil CO2 gas emission flows in Urban Forests"

"Amerika Seriitat telah menjadi pemeran utama dalamindustri kayu. Kondisi tersebut telah menjadi beban bagipemerintah Amerika Serikat oleh karena meningkatanyatekanan dari para ahii di bidang lingkungan, yang lebihmendukung dilaksanakannya reboisasi dibandingkandeboisasi. Pergeseran peran dari pengekspor kayuutama menjadi pengimpor kayu, telah menyebabkanpasar nasional Amerika Serikat mengalami kerugian,seperti meningkatnya harga produk kayu. Konflik antaraAmerika Serikat dengan Kanada berkaitan denganpraduk kayu telah menarik banyak perhatian dari parastakeholder, dan telah membuat Pemerintahan Bushmeresmikan saatu kebijakan perkayuan yang didalamnya diatur mengenai pembaukaan hutan kembaiidan program hutan sehat. Artikel ini mencoba menbahasmengenai situasi seputar kebijakan Amerika Serikatmengenai praduksi kayu."

"ABSTRAKKanopi merupakan struktur yang berfungsi untuk melindungi penghuni maupun bagian luar suatu bangunan dari sinar matahari atau terpaan hujan. Material yang sering digunakan pada konstruksi kanopi adalah baja. Baja sendiri sering digunakan karena memiliki beberapa keunggulan, antara lain kuat, awet, dan mudah dipasang. Jenis struktur kanopi dengan materal baja sendiri dapat berupa struktur diagrid, struktur dendriform dan struktur open weave. Penelitian ini bertujuan untuk menganalisis respon struktur akibat pengaruh variasi putaran kolom, dimensi pipa baja dan jumlah kolom pada struktur kanopi baja yang berlokasi di AEON Tanjung Barat. Gaya yang bekerja pada struktur ini adalah gaya gravitasi, gaya gempa respon spektrum dan gaya gempa displacement. Struktur mall sendiri diasumsikan melalui dua pendektan: struktur mall diasumsikan tidak dapat bergerak dan stuktur mall diasumsikan dapat bergerak. Sambungan antara struktur mall dengan kanopi sendiri diasumsikan melalui dua pendekatan yaitu, sambungan sebagai perletakan sendi dan sambungan sebagai perletakan pegas. Hasil penelitian ini menunjukan struktur yang diasumsikan memiliki sambungan pegas lebih fleksibel dibandingkan dengan struktur yang diasumsikan memiliki sambungan sendi. Selain itu dapat diketahuai bahwa variasi dimensi sangat mempengaruhi respon struktur diikuti oleh variasi jumlah kolom, sedangkan variasi putaran kolom tidak mempengaruhi respon struktur secara signifikan

---

ABSTRACT

Canopy is a structure that serves to protect the occupants or the outside of a building from sunlight or rain. The material that is often used in canopy construction is steel. Steel itself is often used because it has several advantages, including strong, durable, and easy to install. The type of canopy structure with steel materal itself can be classified as diagrid structure, dendriform structure and open weave structure. This study aims to analyze the response of the structure due to the influence of variations in the twisting of the column, the dimensions of the steel pipe and the number of columns in the steel canopy structure located at AEON Tanjung Barat. The forces acting on this structure are gravitational force, response spectrum and displacement force. The mall structure itself is assumed through two approaches: the mall structure is assumed to be immobile and the mall structure is assumed to be mobile. The connection between the mall structure and the canopy itself is assumed through two approaches, namely, the connection as pin connetion and the connection as spring connection. The results of this study indicate that structures assumed to have spring connections are more flexible than structures that are assumed to have joint connections. Whereas it can be known that the dimension of the steel pipe greatly influences the structure response followed by the number of column, whereas the twisting of the column does not significantly affect the structural response"

"Rainfall interception losses were monitored for six months and related to vegetation and rainfall characteristics at the BPK-ODA research site in the upper stream of Mentaya river, Central Kalimantan. The rainfall interception losses were quantified based in the records of 52 selected rainfall events within the range of 8.5-135.5 mm. Over 6 months in one hectare pristine tropical rainforest, 217 mm (11%) of 1990 mm gross rainfall occurring in the research was loss to the atmosphere. Canopy through fall equaled 1745 mm (87.7%) of gross rainfall whereas stem flow represented 28 mm (1.3%). These findings are comparable to interception studies carried out in Sabah and Amazonian rainforest.

"

"Rainfall interception losses were monitored for 12 months and related to vegetation and rainfall characteristics at the Wanariset Sangai on the upper reaches of Mentaya river. The rainfall interception losses were quantified based on the records of 55 selected rainfall events in the unlogged forest and of 95 rainfall events in the logged-over area. In the unlogged forest, the total amount of rainfall interception loss was 251 mm or about 11% while in the logged forest, it was 219 mm or 6%. It was also simulated by the Gash’s original and revised models. Both models adequately predicted total interception loss over a long period, resulting in estimates of the interception loss deviated by 6-14% for both forests."

"Diversity on the lowland pitcher plants (Nepenthes spp.) in Central Kalimantan were conducted between August 2005 and September 2006 at three locations study. That is: Barito Ulu, Sebangau and Kasongan district. Survey inventories were used to determine the diversity of Nepenthes at the study site. We found sixteen Nepenthes at study area, divided nine Nepenthes species; N. albomarginata, N. ampullaria, N. gracilis, N. hirsuta, N. mirabilis, N. rafflesiana, N. reinwardtiana, N. stenophylla, one unidentified Nepenthes species and seven natural hybrid; N. xhookeriana (N. rafflesiana x N. ampullaria), N. xtrichocarpa (N. gracilis x N. ampullaria), N. xneglecta (N. gracilis x N. mirabilis), N. mirabilis x ampullaria, N. mirabilis x rafflesiana, N. reinwardtiana x N. mirabilis and N. reinwardtiana x gracilis. Heath forest and peat swamp forest are generaly the habitat of lowland Nepenthes at Central Kalimantan."

"Ketika pemerintah membentuk Provinsi Kalimantan Tengah berdasarkan Undang-Undang Darurat Nomor 10 Tahun 1957, Pahandut yang dipilih sebagai ibu kota belum siap melaksanakan fungsinya tersebut karena belum dibangunnya sarana dan prasarana yang representatif. Sambil menunggu pembangunan di Pahandut, untuk sementara waktu, ibu kota berkedudukan di Banjarmasin. Pada 1959, kedudukan Pemerintah Daerah Kalimantan Tengah dari Banjarmasin pindah ke Palangkaraya, yaitu nama baru Pahandut. Sesuai dengan kedudukannya sebagai ibu kota Provinsi Kalimantan Tengah, maka pemerintah daerah segera melakukan pembenahan Palangkaraya, dimulai dari pemekaran wilayah administrasi, pembentukan kecamatan, dan penataan kampung-kampung. Sesuai Undang-Undang Nomor 1 Tahun 1957, Palangkaraya merupakan kotapraja administratif, yaitu kota yang berfungsi sebagai pusat pemerintahan wilayah atau daerah tertentu. Oleh karena keinginan untuk mengatur rumah tangganya sendiri secara mandiri, pemerintah daerah Kotapraja Administratif Palangkaraya berusaha meningkatkan statusnya menjadi kotapraja otonom. Usaha ini terwujud pada 1965 dengan dikeluarkannya Undang-Undang Nomor 5 tahun 1965.

---

When the government of Republic of Indonesia established the Province of Central Borneo by Emergency Law No. 10 Year 1957, Pahandut chosen as the capital is not ready to perform its function as the construction of facilities and infrastructure has not representative. While waiting for construction in Pahandut, for a time, the capital located in Banjarmasin. In 1959, the seat of the local government of Central Borneo moved to Palangkaraya, the new name for Pahandut. In keeping with its position as the capital of Province of Central Borneo, the local government immediately make city reform of Palangkaraya, starting from the expansion of administrative region, the formation of the district, and the arrangement of the villages. As enumurated under Law No. 1 Year 1957, Palangkaraya is administrative municipality, i.e. the city who serves as the administrative center of the region. Because of the people aspiration to set up their own household independently, Administrative Municipality of Palangkaraya try to improve the status to a autonomous municipality. This effort was realized in 1965 under Law No. 5 Year 1965."