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Impact of Landuse Change to Erosion at Cidanau Watersheed, Banten K. MUNIBAH; SANTUN R.P. SITORUS; E. RUSTIADI; K. GANDASASMITA; . HARTRISARI
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 32 (2010): Desember 2010
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n32.2010.%p

Abstract

Landuse is a manifestation of relationship between human activities and environmental changes, like erosion. Impact of landuse change to erosion was already happened, such as decreasing of soil fertility, flood at low land. An anticipation of landuse change was one of several alternatives that can minimize erosion. The objectives of this research were to analyze the impact of landuse change and to create the recommendation of landuse that can minimize erosion. Prediction map of landuse on 2018 and 2030 were obtained from previous research. Erosion rate were caluculated based on Universal Soil Loss Equation (USLE). This research predicted that landuse change could increase erosion rate, with asumsion if no change in term of RKLS values. The actual erosion rate (A) were 149,7 t ha-1 year-1 (2006), 154,4 t ha-1 year-1 (2018), and 159,2 t ha-1 year-1 (2030). This erosion rate were 3,7-4,9 times bigger than the tolerable erosion rate (TSL = 40 t ha-1 year-1). Modification of C and P values could minimize the actual erosion rate (A) until less than the tolerable erosion rate (A<TSL). Results of this research could be used as input for landuse planning, especially for landuse that would increase erosion rate.
A Preliminary Criteria and Classification of Land Degradation Level on Dryland (Case Study : Dryland in Bogor Regency) SANTUN R.P. SITORUS; B. SUSANTO; O. HARIDJAJA
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 34 (2011): Desember 2011
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n34.2011.48-65

Abstract

Optimization of dry land utilization in Indonesia including in Bogor Regency is generally still has a lot of constraints. One of the causes is land degradation. At the moment, land degradation inventory is still resulting tentative acreages, since the criterion and overcome priority were different among institutions. This research aims (1) to know variables affecting level of land degradation, and (2) to compose criterion (classes range) andclassification of land degradation level in dry land both for reconnaissance and semi-detail scales based on variables affecting level of degradation. The research was conducted at three subdistricts, namely Sukamakmur, Babakan Madang and Cigudeg subdistricts. Data was collected on surveys through a case study. Biophysical data and soil samples were collected at60 key regions (derived from 3 subdistricts x 5 land critical levels x 4 replications). On each key region, undisturbed and composite soil samples were collected, altogether 60 undisturbed and 60 composite soil samples. The data were analyzed using discriminant analysis and cluster analysis. This research was resulting three criterions (range of classes) for five variables determining level of land degradation for reconnaissance and eight variables for semi-detail scales. The five variables for reconnaissance scale were type of bedrock, slope, conservation practices (P-value), silt percentage, and land use/vegetation (Cvalue). The eight variables for semi-detail scale were type of bedrock, slope, conservation practices (P-value), silt percentage, land use/vegetation (C-value), P-available, exchangeable Al, and H. This research had also generated three degradation levels for reconnaissance and semi-detail scales. The classification of land degradation for reconnaissance scale were (1) slightly degraded land (score <16), (2) moderately degraded land (score 16-39),and (3) strongly degraded land (score >39). Whilst, the classification of land degradation for semi-detail scale were (1) slightly degraded land (score <15), (2) moderately degraded land (score 15-38), and (3) strongly degraded land (score > 38).
Kajian Perubahan Tingkat Pelayanan Jalan dan Kualitas Udara Di Zona Tidak Sesuai untuk Perumahan Rina Marina Masri; Santun R.P. Sitorus; Kooswardhono Mudikdjo; Lilik Budi Prasetyo; Hartrisari Hardjomidjojo
Jurnal Permukiman Vol 3 No 2 (2008)
Publisher : Direktorat Bina Teknik Permukiman dan Perumahan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31815/jp.2008.3.115-128

Abstract

Dampak perkembangan Kawasan Bandung Utara di zona tidak sesuai untuk perumahan meningkatkan pertumbuhan jumlah penduduk dan perekonomian masyarakat, menurunkan kualitas lingkungan yang ditandai dengan menurunnya tingkat pelayanan jalan dan kualitas udara. Penelitian ini bertujuan untuk mengevaluasi  pola perubahan volume lalulintas  dan tingkat pelayanan jalan; mengetahui hubungan pola perubahan volume lalulintas dan pencemaran udara terhadap indeks kualitas lingkungan; dan mengusulkan pilihan kebijakan dalam pengelolaan lalu lintas. Pengumpulan data primer diperoleh dari pengamatan fisik kimia udara dan lalu lintas dari lapangan serta data sekunder dari instansi-instansi berwenang. Analisis sistem dampak pembangunan perumahan terhadap kinerja jalan dan pencemaran udara menggunakan software Excel for Windows 2003 dan Powersim versi 2.5C. Hasil yang diperoleh adalah : (i) peningkatan volume lalu lintas di sepanjang koridor  jalan serta menurunnya kinerja tingkat pelayanan jalan dengan kategori D,E, F (>0,85), (ii) penurunan indeks kesehatan lingkungan (peningkatan jumlah kematian dini akibat pencemaran udara); (iii) pengelolaan dampak lingkungan dengan memprioritaskan kebijakan perbaikan kapasitas jalan,rasio volume dengan kecepatan kendaraan melalui penambahan lajur jalan dan lebar jalan. 
STATUS EKOSISTEM PESISIR BAGI PERENCANAAN TATA RUANG WILAYAH PESISIR DI KAWASAN TELUK AMBON YULIA ASYIAWATI; FREDINAN YULIANDA; ROKHMIN DAHURI; SANTUN R.P. SITORUS; SETYO BUDI SUSILO
Jurnal Perencanaan Wilayah dan Kota Vol. 10 No. 1 (2010)
Publisher : Program Studi Perencanaan Wilayah dan Kota, UPT Publikasi Publikasi Ilmiah UNISBA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jpwk.v10i1.242

Abstract

This study aims is to analyze the status of coastal ecosystems, to analyze factors that affect the quality of coastal ecosystems, and to prepare the direction on spatial planning in coastal areas of Ambon Bay Area.The analytical method used in this study is the analysis of ecosystem status, principal components analysis, analysis GIS and analysis of dynamic systems.The results showed that the condition of ecosystem status damaged in 2008, whereby, the status of mangrove ecosystems is moderate with a density of 1100 trees/ha, the status of seagrass ecosystems damaged by percentage cover of 38,76%, and the status of coral reef ecosystems are damaged by the percentage of live coral is 42,27%By using dynamic systems analysis, created the scenario of land use planning in Ambon Bay Area that integrates land and wet land. The scenario used in this study is the optimistic, pessimistic and moderate scenarios. The variable that is used to determine of policy scenarios spatial planning based on the rate of population growth is 2,5% per annum, while variable forest area of at least 30% of the area. Of the three scenarios, the scenario chosen for the land use planning policy in Ambon Bay Areas in the future is to use the moderate scenario. The simulation results moderate scenario, the status of coastal ecosystems is improved from the criteria of the coastal ecosystem damaged by coastal ecosystems index 44,44% in 2008 turned into good condition with the index of coastal ecosystems 88,89% in 2029