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Spatial Analysis of the River Line and Land Cover Changes in the Kampar River Estuary: The Influence of the Bono Tidal Bore Phenomenon Putra, Aprizon; Wisha, Ulung Jantama; Kusumah, Gunardi
Forum Geografi Vol 31, No 2 (2017): December 2017
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v31i2.5290

Abstract

The Kampar River estuary is well known for a tidal-bore phenomenon called ‘Bono waves’. The emergence of Bono waves has a significant influence on the estuary system of Kampar River. Scoured materials, resulting from the hydraulic jump of the tidal bore, are carried into the middle of the river. These materials are then deposited when the velocity of the river decreases as a result of the collision of the tidal current from the sea and the river flow. The aim of this was to determine the area of erosion and sedimentation with respect to the river line and perform land-cover change analysis for the area around the Kampar River estuary for the years of 1990, 2007, 2010 and 2016. The method employed was the supervised maximum likelihood (SML) classifications, which uses an overlay technique to yield alternate information on the river line and land-cover changes in the form of time-series data. The largest erosion occurred during 1990–2007, for which the average change reached 2.36 ha/year. The smallest erosion occurred during 2010–2016, when the change reached 0.41 ha/year. The largest land-cover change was found during 1990–2016, which occurred in the land for agriculture/plantations (11.57 ha/year), building/settlement (48.11 ha/year) and scrubland (30.88 ha/year). The other types of land cover, such as bare land and sediment deposition, varied every single year. The changes to the river line are caused by land-cover changes, and the Bono waves that lead to erosion and sedimentation that is not stable in the middle of the river and downstream.
Identifikasi Kontaminasi Air Tanah Oleh Polutan Cl- di Kawasan Pertanian Garam, Kecamatan Pademawu, Pamekasan, Madura Menggunakan Metode Geolistrik Tahanan Jenis Gemilang, Wisnu Arya; Wisha, Ulung Jantama; Kusumah, Gunardi
Jurnal Teknologi Lingkungan Vol. 20 No. 1 (2019)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1023.317 KB) | DOI: 10.29122/jtl.v20i1.2944

Abstract

ABSTRACTPademawu Sub-District consist of salt ponds reached 740.96 Ha that is the second largest area in Pamekasan. Land-use overlapping problems between salt ponds and settlement influence the environmental degradation enhancement. The presence of salt ponds is indicated as the cause of increased salinity in well-water around the settlement so that the well-water is salty. To determine the influence of salt pond on groundwater pollution, the information regarding surface characteristics as well as the profile beneath the surface is essential. The method consisted of a hydro-geology survey, hydrochemistry, and geophysics (Geo-Electricity method). The type of groundwater is predominated by chloride (Na-Cl) and carbonate (Na-HCO3, Ca-HCO3). Based on groundwater chemistry element calculation, it is observed that there is an influence of salt pond infiltration on groundwater aquifer. The conductivity of groundwater ranged from 15,000–50,000 µS/cm (categorized into salty water). The specific resistance value of rocks beneath the surface varied between 0.1–300 that is usual in either coastal or alluvial area. The low value of specific resistance associated with alluvial lithology consisted of either brackish water or salt water expected the result of salt pond filtration. The depth of surface saltwater contaminating the aquifer layer ranged from 5 up to 30 meters. The presence of salt ponds influences the level of contamination of Cl- pollutant in shallow groundwater in Pademawu Sub-District, Madura, so it is necessary to re-arrange the land-use system in the coastal area.Keyword: groundwater pollution, salt pond, Pademawu Sub-District, Specific resistance Geo-ElectricityABSTRAK Kecamatan Pademawu terdiri atas kawasan tambak garam seluas 740,96 Ha yang merupakan wilayah terluas kedua di Pamekasan. Pemasalahan tumpang tindih jenis pemanfaatan lahan tambak garam dengan lahan pemukiman berpengaruh terhadap peningkatan degradasi lingkungan. Keberadaan tambak garam diindikasikan sebagai penyebab meningkatnya kadar salinitas pada air sumur di sekitar pemukiman sehingga air sumur terasa asin. Untuk mengetahui pengaruh keberadaan tambak garam terhadap pencemaran air tanah, dibutuhkan informasi mengenai karakteristik permukaan maupun profil bawah permukaan. Metode penelitian yang dipakai terdiri atas survei hidrogeologi, hidrokimia dan geofisika (metode geolistrik). Tipe air tanah didominasi oleh tipe klorida (Na-Cl) dan karbonat (Na-HCO3,Ca-HCO3), hasil perhitungan rasio unsur kimia air tanah menunjukkan adanya pengaruh infiltrasi air tambak garam kedalam akuifer air tanah. Nilai DHL air tanah daerah penelitian didominasi nilai dengan kisaran 15.000–50.000 µS/cm dan masuk dalam sifat air asin. Nilai tahanan jenis batuan bawah permukaan bervariasi antara 0,1–300 Ωm yang umum dimiliki pada kawasan pesisir atau alluvial. Nilai tahanan jenis rendah berasosiasi dengan litologi alluvial yang terdiri atas air payau atau air asin yang diduga hasil infiltrasi dari air tambak garam. Kedalaman muka air asin yang mencemari lapisan akuifer berada pada kisaran kedalaman 5 hingga 30 m. Keberadaan tambak garam memberi pengaruh terhadap tingkat pencemaran polutan Cl- pada air tanah dangkal yang ada di Kecamatan Pademawu, Madura, sehingga dibutuhkan penataan ulang sistem tata guna lahan di kawasan pesisir tersebut.Kata kunci: pencemaran air tanah, tambak garam, Kecamatan Pademawu, Geolistrik tahanan jenis
FAKTOR HIDRO-OSEANOGRAFI TERHADAP DISTRIBUSI AIR TAWAR BERSUHU RENDAH DEKAT PANTAI SEKITAR LOKASI KELUARAN AIR TANAH LEPAS PANTAI (KALP) DI PERAIRAN LOMBOK UTARA, INDONESIA Wisha, Ulung Jantama; Kusumah, Gunardi
OLDI (Oseanologi dan Limnologi di Indonesia) Vol 4, No 3 (2019)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/oldi.2019.v4i3.157

Abstract

Pantai Utara Lombok memiliki banyak sumberdaya seperti Keluaran Air Tanah Lepas Pantai (KALP). Keluaran air tanah terbesar terdapat di Pantai Krakas. Keluaran air tanah yang dingin mungkin memicu ketidakseimbangan lingkungan disekitarnya (pendinginan lokal). Tujuan dari penelitian ini adalah untuk mengetahui pengaruh dari faktor fisika yang mendukung distribusi keluaran air tanah dingin. Kegiatan survei lapangan dilakukan pada tanggal 23-26 Maret 2016. Flow model dan analisis statistik digunakan untuk mengetahui pola transport dari anomali suhu. Secara vertikal, pergerakan arus laut mengikuti kaidah spiral Ekman yang mempengaruhi distribusi vertikal dari air tanah. Kecepatan arus pada kondisi menuju pasang berkisar antara 0-0,15 cm/detik, dominan arah arusnya menuju ke barat daya. Pada saat menuju surut kecepatan arus berkisar antara 0-0,32 cm/detik, dominan arah arusnya menuju ke timur laut. Fluktuasi suhu mengikuti perubahan elevasi muka air di lokasi KALP dimana nilai korelasi sebesar 63 %.
KUALITAS PERAIRAN TELUK BUNGUS BERDASARKAN BAKU MUTU AIR LAUT PADA MUSIM BERBEDA Tanto, Try Al; Kusumah, Gunardi
Maspari Journal : Marine Science Research Vol 8, No 2 (2016): Edisi Juli
Publisher : UNIVERSITAS SRIWIJAYA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1056.198 KB) | DOI: 10.36706/maspari.v8i2.3490

Abstract

Pembangunan di kawasan Bungus berkembang pesat, dapat menjadi penyebab kerusakan lingkungan  perairan  sekitarnya.  Laporan  dari  media  lokal  dan nasional,  terjadi pencemaran  air  laut  dan  tingginya  sedimentasi.  Penelitian ini  menjadi  penting  karena belum  banyak  studi  terkait  pencemaran perairan  dilakukan.  Pengambilan  data  air  laut dilakukan  di  15  titik pengukuran  pada  permukaan  dan  kedalaman  5  m.  Data tersebut dianalisis di laboratorium serta pengukuran secara  in-situ  untuk pengukuran permukaan. Selain itu juga dilakukan pengukuran pada 3 muara sungai besar untuk pengukuran TSS dan melihat  sedimentasi. Waktu pengambilan data dilakukan pada musim berbeda, yaitu Bulan  Mei  dan  November  2013, sehingga  diperoleh  data  yang  bervariasi  sesuai  dengan kondisi musim. Sampai akhir tahun 2013, kualitas air laut (kekeruhan, pH, salinitas, suhu, DO, BOD, amoniak) perairan Teluk Bungus masih berada pada batas aman sesuai dengan baku  mutu,  baik  yang  terjadi  pada  musim  kemarau  maupun musim  hujan.  Hal  berbeda terjadi pada nilai TSS di sekitar muara, dengan nilai  berada diluar batas  aman baku mutu dan kekeruhan perairan tinggi saat musim hujan. Pada umumnya, pencemaran perairan di Teluk Bungus disebabkan oleh tingginya sedimentasi.KATA KUNCI:   Kekeruhan,  kualitas  perairan,  pencemaran  perairan, sedimentasi, Teluk Bungus.
REMOTE ESTIMATION OF TOTAL SUSPENDED SOLID (TSS) TRANSPORT AFFECTED BY TIDAL BORE “BONO” OF KAMPAR BIG RIVER ESTUARY USING LANDSAT 8 OLI IMAGERY Wisha, Ulung Jantama; Dhiauddin, Ruzana; Kusumah, Gunardi
Marine Research in Indonesia Vol 42 No 1 (2017)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1378.087 KB) | DOI: 10.14203/mri.v42i1.116

Abstract

The Kampar River estuary has a unique tidal bore, namely Bono. A tidal bore is a natural phenomenon caused by the tidal flow which meet the flow of the river. Tidal bore "Bono" has an impact on the transport of suspended particles which is pretty much along the Kampar River. The purpose of this study is to determine the estimated concentration of total suspended solid in the river as the result of the transport by Bono in Kampar River estuary by Landsat 8 OLI. The primary data are Landsat 8 OLI sensor – on Path 126 and Row 60, recording date was on 23 -04-2016, which was analyzed spatially – and TSS in situ. The secondary data are tide forecasting data and topographical map of Indonesia. Distribution of total suspended solid indicates sediment transport and its distribution by TSS values ranged between 10-150 mg.L-1 and TSS in situ value ranged between 42-241 mg.L-1. Tidal range ranged from 0.78 to 4.2 m and current velocity ranged from 0-0.9 m.s-1, which generate tidal bore extending from the mouth to the river body, resulting in suspended particle transport along the river. TSS concentration is higher in the river estuary.
REMOTE ESTIMATION OF TOTAL SUSPENDED SOLID (TSS) TRANSPORT AFFECTED BY TIDAL BORE “BONO” OF KAMPAR BIG RIVER ESTUARY USING LANDSAT 8 OLI IMAGERY Wisha, Ulung Jantama; Dhiauddin, Ruzana; Kusumah, Gunardi
Marine Research in Indonesia Vol 42, No 1 (2017)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1378.087 KB) | DOI: 10.14203/mri.v42i1.116

Abstract

The Kampar River estuary has a unique tidal bore, namely Bono. A tidal bore is a natural phenomenon caused by the tidal flow which meet the flow of the river. Tidal bore "Bono" has an impact on the transport of suspended particles which is pretty much along the Kampar River. The purpose of this study is to determine the estimated concentration of total suspended solid in the river as the result of the transport by Bono in Kampar River estuary by Landsat 8 OLI. The primary data are Landsat 8 OLI sensor – on Path 126 and Row 60, recording date was on 23 -04-2016, which was analyzed spatially – and TSS in situ. The secondary data are tide forecasting data and topographical map of Indonesia. Distribution of total suspended solid indicates sediment transport and its distribution by TSS values ranged between 10-150 mg.L-1 and TSS in situ value ranged between 42-241 mg.L-1. Tidal range ranged from 0.78 to 4.2 m and current velocity ranged from 0-0.9 m.s-1, which generate tidal bore extending from the mouth to the river body, resulting in suspended particle transport along the river. TSS concentration is higher in the river estuary.