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Analisis Spasial Potensi Kekeringan di Daerah Aliran Sungai Kapuas, Kalimantan Barat Auliyani, Diah; Rekapermana, Muhammad
Jurnal Pembangunan Wilayah dan Kota Vol 16, No 1 (2020): JPWK Vol 16. No. 1 March 2020
Publisher : Universitas Diponegoro, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1242.592 KB) | DOI: 10.14710/pwk.v16i1.21979

Abstract

Kekeringan merupakan efek samping dari variabilitas iklim, yang dapat terjadi di daerah dengan curah hujan tinggi maupun rendah. Kekeringan dapat menjadi suatu bencana apabila terjadi secara terus menerus. Standardized Precipitation Index (SPI) memudahkan pemantauan kejadian kekeringan dengan memanfaatkan standar deviasi dari curah hujan. Penelitian ini bertujuan untuk menganalisis potensi kekeringan di Daerah Aliran Sungai (DAS) Kapuas. Lokasi penelitian merupakan DAS terbesar di Provinsi Kalimantan Barat. Dalam tulisan ini akan digunakan SPI periode kumulatif 1 bulan, 3 bulan, 6 bulan, dan 12 bulan untuk menentukan tingkat kekeringannya. Dengan menggunakan perangkat lunak Arc GIS, nilai rata-rata SPI setiap periode kumulatif kemudian diinterpolasikan untuk mendapatkan sebaran spasial potensi kekeringan di seluruh wilayah DAS Kapuas. Seri data curah hujan harian tahun 1995-2017 dari 5 stasiun hujan yang kelola oleh Badan Meteorologi, Klimatologi, dan Geofisika (BMKG) Provinsi Kalimantan Barat digunakan dalam analisisnya. Kelima stasiun pengamatan hujan tersebut terletak di (1) Bandara Supadio Pontianak, (2) Pelabuhan Maritim Pontianak, (3) Bandara Susilo Sintang Kabupaten Sintang, (4) Bandara Nanga Pinoh Kabupaten Melawi, dan (5) Bandara Pangsuma Kabupaten Kapuas Hulu. Hasilpenelitian menunjukkan bahwa setiap lokasi pengamatan hujan mengalami kekeringan untuk setiap periode kumulatif dengan frekuensi 1 hingga 4 kali.Kekeringan tersebut memiliki durasi paling lama 2 bulan secara berturut-turut. Distribusi spasial SPI di DAS Kapuas memiliki nilai antara -0,1 hingga -0,07 yang termasuk dalam kategori normal. Secara keseluruhan, DAS Kapuas merupakan wilayah yang tidak berpotensi mengalami bencana kekeringan. Drought is a side effect of climate variability, which can occur in areas with high or low rainfall.  Drought will become a disaster if it happens continuously. Standardized Precipitation Index (SPI) facilitates the drought monitoring by utilizing standard deviation of its rainfall. This study aims to analyze the potential for drought in the Kapuas Watershed. Kapuas Watershed is the widest watershed located in West Kalimantan Province. In this paper, 1 month, 3 months, 6 months, and 12 months cumulative periods of SPI will be used to determine the level of drought.  Using Arc GIS software, the average SPI value for each cumulative period is then interpolated to obtain the spatial distribution of potential drought in the entire Kapuas Watershed area.The 1995-2017 daily rainfall data series from 5 rainfall stations managed by The West Kalimantan Province Meteorology, Climatology and Geophysics Agency (BMKG) were used in this analysis. The five rainfall stations are located at (1) Supadio Airport, Pontianak, (2) Pontianak Maritime Port, (3) Susilo Airport, Sintang Regency, (4) Nanga Pinoh Airport, Melawi Regency, and (5) Pangsuma Airport, Kapuas Hulu Regency.  The results showed that each rainfall station experienced drought for each cumulative period with a frequency of 1 to 4 times. Its duration was 2 months or less. The spatial distribution of SPI in Kapuas Watershed has a value between -0.1 to -0.07 which categorized as normal. Overall, Kapuas Watershed is an area that has no potential for drought.
APLIKASI SISTEM INFORMASI GEOGRAFIS DALAM Pemetaan KERENTANAN KAWASAN TAMAN NASIONAL BUKIT BAKA BUKIT RAYA, PROPINSI KALIMANTAN BARAT auliyani, diah
MAJALAH ILMIAH GLOBE Vol 19, No 1 (2017)
Publisher : Badan Informasi Geospasial

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (674.206 KB) | DOI: 10.24895/MIG.2017.19-1.565

Abstract

ABSTRAKTaman Nasional Bukit Baka Bukit Raya (TNBBBR) merupakan perwakilan tipe ekosistem hutan hujan tropis pegunungan dan habitat satwa liar baik yang dilindungi maupun yang belum dilindungi. Fisiografi kawasan ini berupa pegunungan patahan yang di dalamnya terdapat salah satu dari The Seven Summits of Indonesia yaitu Bukit Raya. Kondisi tersebut menyebabkan kawasan ini berpotensi mengalami degradasi karena erosi maupun aktivitas wisata. Penelitian ini bertujuan untuk memetakan kerentanan kawasan TNBBBR menggunakan Indeks Sensitivitas Lingkungan. Penelitian dilaksanakan di dalam kawasan TNBBBR wilayah Kabupaten Sintang Propinsi Kalimantan Barat. Analisis data dilakukan secara spasial menggunakan metode tumpang susun (overlay) dengan pemberian peringkat yang terdiri atas sangat rendah, rendah, sedang, tinggi, dan sangat tinggi. Kerentanan kawasan ditentukan berdasarkan analisis daerah bahaya erosi, daerah tangkapan air dan daerah perlindungan satwa. Hasil penelitian menunjukkan bahwa tingkat kerentanan kawasan TNBBBR wilayah administrasi Kabupaten Sintang bervariasi dari tingkat yang sangat rendah (22,01%), rendah (67,67%), sedang (10,28%), dan tinggi (0,05%). Meskipun hanya sebagian kecil dari lokasi penelitian yang memiliki tingkat kerentanan tinggi, namun semuanya berada di Resort Rantau Malam yang merupakan pintu masuk untuk pendakian ke puncak Bukit Raya dari Propinsi Kalimantan Barat. Sebagian besar daerah dengan tingkat kerentanan tinggi (81,17 %) telah berada di zona rimba. Peruntukan zonasi tersebut bertujuan untuk membatasi aktivitas yang bisa dilakukan sehingga degradasi lingkungan terutama akibat aktivitas antropogenik dapat dicegah.Kata Kunci: biofisik, kerentanan, Sintang, taman nasional, zonasi  ABSTRACTBukit Baka Bukit Raya National Park (BBBRNP) is a representative of tropical rainforest ecosystem and wildlife habitat either the protected wildlife or those that has not been protected yet. It’s physiographic consists of block mountain in which there is Bukit Raya, one of the Seven Summits of Indonesia. These conditions cause this area has potentially degraded due to erosion and tourism activities. This study aimed to map out the vulnerability of BBBRNP area using Environmental Sensitivity Index. Research conducted in the BBBRNP area located in Sintang District, West Kalimantan Province. The data were analyzed using spatial analysis by overlaying with a ranking that divided into very low, low, medium, high, and very high. Regional vulnerability is determined based on an analysis of erosion-prone areas, catchment areas, and wildlife protection areas. The results of this research show that the vulnerability level of the BBBRNP area located in Sintang Districtvary from very low (22,01 %), low (67,67 %), medium (10,28 %), and high (0,05 %). Although only several research areas that have high level of vulnerability, but all of them are located in Rantau Malam Resort which is the entrance for climbing Bukit Raya summit from West Kalimantan Province. Most of those areas located in Wilderness Zone (81,17%). The zoning allocation aimed to limit the anthropogenic activities so that the environmental degradation can be prevented. Keywords: biophysical, vulnerability, Sintang, national park, zoning
Spatial Analysis of Land Degradation Susceptibility and Alternative Plants for Its Rehabilitation Auliyani, Diah; Basuki, Tyas Mutiara; Wijaya, Wahyu Wisnu
Forum Geografi Vol 33, No 1 (2019): July 2019
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v33i1.7499

Abstract

One of the drawbacks of developing plants for the rehabilitation of degraded land in Indonesia is the relative lack of information about species that are suited to the local conditions. Therefore, spatial information on land degradation and the plants suitable for rehabilitation is crucial. The objectives of this study were to map the susceptibility of land to degradation and to identify some alternative species for its rehabilitation. The research was conducted in Jang Watershed, Bintan Island, Kepulauan Riau Province, Indonesia. A quick assessment of land degradation was carried out to classify the degree of land susceptibility. The land suitability evaluation was conducted manually by matching the existing biophysical condition and plant growth requirements using a geographic information system. This analysis was applied for annual plants, such as Acacia mangium, Durio zibethinus, Artocarpus champeden, Theobroma cacao and Hevea brassiliensis. Furthermore, the maps of land susceptibility to degradation and species suitability were overlaid and the result was used to provide recommendations for rehabilitating the degraded land. This study showed that 22% of the Jang Watershed area can be categorised as highly susceptible to degradation. The suitability analysis illustrated that 59% of the degraded areas were suitable for Acacia mangium. The planting of fast-growing species such as Acacia mangium is expected to improve the physical, chemical and biological properties of the soil.
PERBANDINGAN PREDIKSI HASIL SEDIMEN MENGGUNAKAN PENDEKATAN MODEL UNIVERSAL SOIL LOSS EQUATION DENGAN PENGUKURAN LANGSUNG (Comparison of sediment yield from prediction using Universal Soil Loss Equation with direct measurement) Diah Auliyani; Wahyu Wisnu Wijaya
Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research) Vol 1, No 1 (2017): Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Managem
Publisher : Center for Implementation of Standards for Environmental and Forestry Instruments Solo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (965.015 KB) | DOI: 10.20886/jppdas.2017.1.1.61-71

Abstract

Low level of sedimentation is a success indicator of watershed management. Measurement of sedimentation can be conducted directly or through erosion prediction approach. This research aimed to compare sediment yield from prediction by USLE erosion approach using three types formulations of rainfall erosivity with direct measurement. The field data were collected during 2015 in Lowereng Sub Watershed, Sempor District of Kebumen Regency. The slope steepness was derived from ASTER Global Digital Elevation Model and land cover was obtained from World View 2012. Three methods for estimating rainfall erosivity were Utomo and Mahmud, Bols, and Lenvain equations. The USLE applied for every land unit. By considering Sediment Delivery Ratio (SDR), the predicted soil erosion from USLE was converted into sediment yield. The direct measurement of sediment yield was conducted by taking suspended sediment in the outlet of sub watershed. This research indicates that the predicted sediment yield calculated using USLE approach was higher than the direct measurement. The predicted sediment yield using Lenvain’s equation was 3.49 ton/ha (196%), which was the closest to the direct measurement (1.18 ton/ha).
DAERAH BAHAYA BANJIR DI SUB DAERAH ALIRAN SUNGAI SEPAUK DAN TEMPUNAK, KABUPATEN SINTANG, PROVINSI KALIMANTAN BARAT (Flood hazard in Sepauk and Tempunak Sub Watersheds, Sintang Regency, West Kalimantan Province) Diah Auliyani
Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research) Vol 1, No 2 (2017): Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Managem
Publisher : Center for Implementation of Standards for Environmental and Forestry Instruments Solo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (782.942 KB) | DOI: 10.20886/jppdas.2017.1.2.83-95

Abstract

Flood-prone areas mapping is often constrained by limited data availability at the site level. A quick assessment of sub watershed degradation method can be used to identify the degradation level of a sub watershed includes the flood hazard areas. This method is very easy to be applied at a site level using Geographic Information System (GIS), although it has minimum data. The aim of this study was to analyze the level of flood hazard in Sepauk and Tempunak Sub Watersheds, Sintang Regency, West Kalimantan Province. The required data were DEM/ SRTM (Digital Elevation Model/ Shuttle Radar Topography Mission), daily rainfall, and land cover. Quick assessment of sub watershed degradation method was applied to classify the flood-prone level of the study areas. The results showed that most of the study areas were categorized as high level of flood hazard (78% for Sepauk and 56% for Tempunak). The land covers of those areas were dominated by mixed dryland agriculture, bare land, and settlements. In addition, high level of flood hazard areas in Sepauk Sub Watershed was also affected by the existence of mining and dryland agriculture areas. Since the land cover change is a dynamic process, the flood hazard areas mapping should also be adjusted continuously to minimize the flood impact.
Temporal distribution of sediment yield from catchments covered by different pine plantation areas Tyas Mutiara Basuki; Irfan Budi Pramono; Rahardyan Nugroho Adi; Esa Bagus Nugrahanto; Diah Auliyani; Wahyu Wisnu Wijaya
Journal of Degraded and Mining Lands Management Vol 5, No 3 (2018)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1047.532 KB) | DOI: 10.15243/jdmlm.2018.053.1259

Abstract

Soil erosion and sedimentation are environmental problems faced by tropical countries. Many researches on soil erosion-sedimentation have been conducted with various results. Quantifying soil erosion-sedimentation and its temporal distribution are important for watershed management. Therefore, a study with the objective to quantify the amount of suspended sediment from catchments under various pine plantation areas was conducted. The research was undertaken during 2010 to 2017 in seven catchments with various percentage of pine coverage in Kebumen Regency, Central Java Province. The rainfall data were collected from two rainfall stations. A tide gauge was installed at the outlet of each catchment to monitor stream water level. The water samples for every stream water level increment were analyzed to obtain sediment concentration. The results showed that monthly suspended sediment of the catchments was high in January to April and October to December, and low in May to September. The annual suspended sediment fluctuated during the study period. Non-linear correlations were observed between suspended sediment and rainfall as well as suspended sediment and percentage pine areas. The line trend between suspended sediment and percentage of pine areas showed that the increase in pine areas decreased suspended sediment, with the slope of the graph is sharp at the percentage of pine areas from 8% to 40%, then is gentle for pine plantation areas more than 40%.