Landasan Ulin is a center for vegetable production, and it has an important role in producing vegetables for the city of Banjarbaru.Agricultural soil in this study was assessed for heavy metal contamination using the geoaccumulation index (I geo ), contamination factor (C f i ), the degree of contamination (C d ), the degree of modified contamination (mC d ), and the Pollution Load Index (PLI) as well as magnetic susceptibility.Samples were collected from topsoil and analyzed using magnetic susceptibility and Atomic Absorption Spectrophotometer (AAS).The average concentration of heavy metals in the sampling area A is Fe>Zn>Mn>Cu>Hg, and the area B is Fe>Mn>Zn>Cu>Hg.Magnetic susceptibility values in area A is higher than in area B and the value of magnetic susceptibility can be used as a proxy for monitoring heavy metal concentrations, especially Zn in this area.Zn and Cu exceeded the threshold set by the Indonesian Standards Institute.Igeo results show that the research area is moderately contaminated with Cu, Zn, and Hg.According to C f i , the soil was classified as low contaminated with Fe, Zn, Cu, Mn, and Hg, as well as Cd and mCd.The PLI results show that in both area, drastic corrective action is not required.

The bouncepoints or reflection point of a seismic wave is very important to determine a research area that utilizes SS precursors data. In this study the data used has criteria, to obtain good data. Hence, the research results are also good, while the criteria are: the depth of the earthquake source is limited to less than 75 Km to reduce interference with precursor waves that arrive earlier (sSdiff) and it is easier to determine the bouncepoint. The earthquake source is more than 5.8 Mw to get a good SS phase signal-to-noise ratio (SNR). The best distance between the source and the receiving station is ≥ 1000 to avoid interference with waves reflected on the surface (Ss670s and Ss400s) and ≤ 1650 to avoid interference with ScSScS precursors. The location of this study is in the south of the island of Kalimantan (15 bouncepoints) and there are 3 points data whose bouncepoints is outside the study area. Earthquake data obtained from IRIS (Incorporated Research Institutions for Seismology). The research data for earthquake centers are in Australia, New Zealand and others, for earthquake measuring stations in Europe and Asia.

Kalimantan Selatan is proud of the Martapura River's natural and cultural history. Martapura tributaries include Riam Kanan and Kiwa. The Martapura River is essential because it provides clean water and a livelihood for riverside residents. Human-caused river pollution grows with population density (also known as anthropogenic pollutants). This study characterizes surface sediment magnetic characteristics and heavy metal contents along the Riam Kanan, Riam Kiwa, and Martapura rivers. The purpose of this research is to evaluate the magnetic signal with respect to heavy metal contents found in surface sediments taken from rivers and to confirm the use of the rock magnetism method in environmental studies in the study area. Surface sediment samples were gathered and tested for magnetic, heavy metal, and mineralogical content. According to the findings, the pseudo-single domain (PSD) magnetite mineral predominates among the magnetic minerals that can be found in the surface sediments of the rivers Riam Kanan, Riam Kiwa, and Martapura. This substantially greater grain size may be due to magnetic particles produced by erosion along the river banks. The mass-specific magnetic susceptibility of surface sediments ranges from 103.11 to 1403.64 x 10-8 m3/kg, with an average value of 355.67 x 10-8 m3/kg due to the peatland environment. Magnetic susceptibility strongly negatively correlates with heavy contents like Cu, Zn, and Hg, according to Pearson correlation analysis. Due to this correlation, magnetic susceptibility may indicate heavy metal pollution in certain rivers. This current study demonstrates the novelty of the relationship between magnetic susceptibility and the contents of heavy metals in surface sediments from rivers in peatland and tropical environments by illustrating how the relationship affects the magnetic susceptibility of the sediments.

The results of the situation analysis show that poor hygiene conditions and sanitation facilities that do not comply with health standards occur at SMAIT ANIC, Banjarbaru City, South Kalimantan. Based on the results of this analysis, the Community Partnership Program (PKM) seeks to solve this problem. The PKM program implemented as a solution is education about cleanliness, to increase the school community's knowledge and awareness of the importance of school cleanliness. School cleanliness plays a role in the implementation of education in schools. The method used in the activity is a lecture with questionnaires given before and after the activity as a means of evaluation. This activity also emphasizes active participation from all parties involved, including students and teachers, as well as school administration staff. The results of the activity showed an increase in students' understanding and awareness of the meaning of school cleanliness and sanitation. These results indicate that the objectives of this PKM program have been achieved. Increasing knowledge will certainly have an impact on environmental cleanliness and clean-living habits of students.

Desa Murung Kenanga merupakan sebuah desa yang terletak di antara dua Sungai Martapura. Desa ini mendapat perhatian khusus dari pemerintah kabupatennya karena terletak di kota Martapura dan berpotensi untuk menjaga kebersihan sungai. Semua kegiatan dari pemerintahan kabupaten ini bertujuan untuk menjadikan desa Murung Kenanga menjadi desa yang Aman, Indah, Ramah - Santun dan Tertata Rapi (AIR-SANTRI). Namun, keprihatinan terhadap kurangnya tingkat kepedulian masyarakat pada pentingnya kebersihan di lingkungan sekitar sungai bukan hanya di sungainya masih dapat dirasakan. Hal ini dapat dilihat dari kondisi lingkungan di Desa Murung Kenanga yang masih terdapat sampah yang berserakan. Permasalahan yang dialami saat ini di masyarakat Desa Murung Kenanga adalah kurangnya kesadaran warga untuk membuang sampah pada tempatnya dan tidak tersedianya tempat sampah di lingkungan tempat tinggal mengakibatkan sebagian masyarakat membuang sampah sembarangan, walaupun tidak langsung ke sungai. Solusi dari permasalahan ini dilakukan melalui kegiatan edukasi, baik menggunakan metode ceramah maupun dengan menggunakan media cetak leaflet dan sticker serta pengadaan tempat sampah pada lingkungan hunian warga. Edukasi tentang kebersihan lingkungan sungai yang dilakukan dapat menambah pengetahuan bagi warga desa Murung Kenanga Kab. Banjar dan juga menunjang sikap untuk menjaga kebersihan di lingkungan sungai. Keberadaan leaflet dan stiker yang terdapat pada tempat sampah dan di sekitar tempat tinggal warga desa, memberikan pengaruh terhadap kesadaran warga untuk membuang sampah pada tempatnya. Begitu juga dengan keberadaan tambahan tempat sampah di lingkunngan desa dapat menambah upaya dalam menjaga lingkungan di sekitar sungai bertambah bersih.

ABSTRACT. Magnetic susceptibility measurements have been carried out at three points (A1, A2 and A3) on the surface soil around the Asam-asam power plant. This study aims to determine the magnetic minerals that may be present in these soil samples. Magnetic susceptibility measurements were carried out using the Bartington Susceptibility Meter MS2B. Based on the range of susceptibility values in soil samples, it shows the content of magnetic minerals such as ilmenite, pyrrhotites and titanomagnetite which are thought to come from fly ash and bottom ash from combustion at the PLTU.KEYWORDS: magnetic minerals, soil, flying ash, bottom ash

Mangroves are plants that live on beaches and river mouths, where these areas experience ups and downs of sea water. Around 3 million hectares of mangrove forest grow along 95,000 kilometers of Indonesia's coast, which is 23% of the world's total mangrove ecosystem. Indonesia's mangrove ecosystems are located in Papua, Kalimantan and Sumatra. This study aims to measure the distribution and density of mangrove forests in Tanah Bumbu Regency, South Kalimantan using Landsat 8 imagery with the support vector machine (SVM) classification method. Meanwhile, the density value was determined using the Normalized Difference Vegetation Index (NDVI) method. The results show that the mangrove distribution area is 2448.84 ha, of which the widest mangrove distribution is in the Simpang Empat area with an area of 1702.62 ha. Based on these results, it shows that the mangrove forest area in Tanah Bumbu Regency still has a fairly dense mangrove area.

Land use is a form of the influence of human activities on part of the physical surface of the earth. Land use will increase if the population increases. Activities carried out by humans can be in the form of building settlements, plantations and agriculture and cannot be separated from spatial problems because they are related to land use. Research aims to identify the land use and create distribution maps of land use in the district of Central Kalimantan province Lamandau using Landsat Satellite Imagery 8 OLI/TIRS. The land use classification uses the maximum likelihood classification method. The result of this research is a map of land use distribution in Lamandau Regency which has an area of approximately 486,738 ha. The results of this study obtained 7 classes of land use in Lamandau Regency, namely forests with an area of 182,383 ha, shrubs 118,263 ha, oil palm plantations 74,666 ha, mixed gardens 51,117 ha, settlements 28,742 ha, agriculture 28,087 ha and rivers 3,480 ha.

410km and 660km discontinuities are very clear and very easily identified discontinuities other than the Moho layer. This research utilizes SS precursor data, bouncepoints in the northern part of Sumatra. The data used is the depth of the epicenter <70 km, earthquake magnitude 5.5 and the distance between the epicenter and earthquake recording station more than 1000. This study is a preliminary study to determine changes in the depth of discontinuity in the study area. The SS phase is very well observed in the transversal component seismogram which is the result of the rotation of two horizontal components NS and EW, to obtain a good seismogram a 0.03Hz low pass filter is performed. In this study used 38 data transversal component seismograms, from 76 horizontal component seismograms. The most important thing in this study is the determination of the SS phase used as a reference (point 0), the SS phase is determined using the AK135 table guide, then the SS precursors are determined which can be seen at 450 seconds, 300 seconds, 90 seconds and 50 seconds before the SS . SS prekursors that are very clear at 450 seconds, are strongly suspected as a 660 km discontinuity. SS prekursors can be seen clearly after the stacking process.

One way to be able to identify rocks below the surface, depth, including groundwater aquifer layers is to do geophysical measurements using the schlumberger geoelectric method. This study aims to determine thickness and depth of aquifers in Lok Rawa Village, Mandastana District, Barito Kuala Regency. The results of the schlumberger configuration geoelectric study showed rock layers in Lok Rawa Village at the measurement points GL1, GL2 and GL3 consisting of weathered, sand, and fine clay (silt) layers. Lapiasan aquifers in Lok Rawa Village at the measurement points GL1, GL2 and GL3 consisting of free aquifer layers are estimated to occur at a depth of 3─5 m with a resistivity value of 7─15 Ωm. Depressed aquifer layer is estimated to be at a depth of 25─75 m and ≥ 110 m with resistivity values of 7─15 Ωm. Of the 2 types of aquifer layers, the most confined aquifer layer has the potential to contain ground water.

Kalimantan, located in the island of Borneo, represents a rare region in Indonesia, which has a relatively low seismic activity as it is located far from subduction zones. The number of existing seismic stations in this region is also quite low. Therefore, in order to investigate the mantle discontinuities beneath Kalimantan, we employed SS precursor data with SS bounce points within the study region (northern Borneo and its surroundings), located more or less halfway between earthquakes and receivers. In this study, we used data from several events in Fiji and Tonga recorded by the seismographic stations UOSS (the United Arab Emirates) and RAYN (Saudi Arabia). We used SS precursors resulting from a strict data selection with criteria: (i) earthquake depths ≤ 75 km; (ii) earthquake magnitudes > 5.8; and (iii) epicentral distances between 120o and 145o. There are two main steps in the data processing: (i) seismogram stacking by employing a Radon transform and (ii) ray tracing by using a shooting method. From the stacking results we obtained a strong energy focus in the Radon domain associated with a discontinuity at ~690 km depth. Another energy focus – which is weak – was also observed that is related to a discontinuity at ~290 km depth. We did not observe the global 410-km discontinuity beneath the study region. We focused our discussion on the strong discontinuity at the depth of 690 km, which is quite significantly deeper than the global average of seismic discontinuity; i.e., at 660 km depth. This observation is related to the subducted oceanic lithospheric slab that penetrates into the lower mantle and is then deflected horizontally below the 660 km depth beneath the study region before going down to a depth of at least 1500 km as depicted by previous tomographic models.

Coal is a combustible sedimentary rock formed from organic deposits of plant residues and carbon, hydrogen and oxygen elements. Modeling of 3D coal distribution and coal volume calculation plays an important role in the exploration because the result of coal volume calculation can be used as consideration for mining. This research uses 6 drill point and calculation of coal volume using cross section method with the help of image processing software that is rockwork16. The result of interpretation of drill point data in the research area were 5 types of rock layers with each rock volume is claystone (25.840.000 m3), claysand (230.00 m3), Coal (5.930.000 m3), carbonaceus clay and soil.

Each region generally has a condition of various land surface, usually used as information for making a geological map of the regions, but the information can not provide a real illustration of the depth of the hard layer (bedrock) found in the area. Thus, to determine the depth of the bedrock as the initial information exploited for the region of Banjarbaru more, then done by measuring the depth of the bedrock by seismic refraction. Soil has several compiler layers, the deeper layer from surface is denser and each layer has defferent characteristics. The nature used in this research is the difference of the speed to creep the seismic waves on each layer. By creeping the seismic waves, the information of undercoat surface is obtained depend on the speed in creeping seismic waves. To find out the speed and types of layers under the soil and to know the depth of the bedrock in the region are done by using seismic equipment refraction, by initial assumption that bedrock usually is found in the relatively shallow depth in the region of Banjarbaru. From the results of the data sampling done by measuring the length of the track 72 meters and then processed by using the software winsism 10 bedrock was found on the yard of engeniring faculty Unlam Banjarbaru in depth around 6-15 meters, in the speed of spreading waves in the range of 2800-3200 (m/s) and there is nappe layer (top soil) of the seismic waves creeping velocity 300-400 (m/s) and a much water content-thinner layer spreading speed of seismic wave in the range of 1400-1600 (m/s).

Kalimantan Selatan mempunyai potensi batuan ultrabasa yang cukup besar, sekitar 11 milyar ton yang tersebar pada lokasi Batulicin, Kelumpang Tengah, Pulau Sewangi dan Pulau Sebuku. Sebaran batuan ultra basa di Indonesia cukup luas, mulai dari Aceh, Sumatra Barat, Kalimantan Selatan, Kalimantan Timur, Sulawesi Selatan, Sulawesi Tenggara, Sulawesi Tengah, NTT, Maluku, Irian Jaya Barat dan Papua. Luas sebaran seluruhnya mencapai 3 juta hektar. Dari sekian banyak sebaran batuan ultrabasa, diantaranya yang dekat aksesibilitasnya dengan aktifitas manusia (kota) adalah sebaran batuan ultrabasa di daerah Kalimantan Selatan, Kalimantan Timur, Sulawesi Selatan, Sulawesi Tenggara, Sulawesi Tengah dan Papua. Pada umumnya batuan ultrabasa di tiap daerah terbentuknya memiliki komposisi mineral/kimianya yang tidak sama. Pengujian mineralogi dengan metoda difraksi sinar X (X-ray diffraction, XRD), di mana sebagian bahan batuan dianalisa untuk melihat komposisi unsurnya.Hasil analisa dengan mengunakan difraksi sinar X diketahui bahwa kandungan yang terdapat pada batuan ultrabasa (peridotit) ini adalah Ca (Mg, Fe) Si2O6; Na, Fe (Si2O6) ; Mg3 Si2 O5 (OH)4 (serpentine). Jika ditinjau dari faktor skala, maka urutan senyawa yang terkandung pada batuan ini adalah sebagai berikut: Na, Fe (Si2O6) dengan 0,997 faktor skala; Mg3 Si2 O5 (OH)4 dengan faktor skala 0,878 dan Ca (Mg, Fe) Si2O6 dengan faktor skala 0,813.