scholarly journals Distribusi Spasial Total Padatan Tersuspensi Puncak Musim Hujan Di Permukaan Perairan Teluk Benoa, Bali

2017 ◽  
Vol 3 (2) ◽  
pp. 223 ◽  
Author(s):  
I Gede Surya Risuana ◽  
I Gede Hendrawan ◽  
Yulianto Suteja
Keyword(s):  
Spatial Distribution ◽  
Interpolation Method ◽  
Total Suspended Solid ◽  
Suspended Solid ◽  
Mouth Area ◽  
High Concentration ◽  
Distance Weighted ◽  
Enclosed Bay ◽  
The One ◽  
Inverse Distance

Benoa Bay is semi- enclosed bay, which has embouchures. The existence of embouchures are able to contribute the Total Suspended Solid (TSS) to the Bay. As the one of pollution parameter, TSS could be influencing the ecosystem of coral reefs, seagrass, and the existence of dissolved oxygen. This research was aimed to know the spatial distribution of TSS on the surface layer in Benoa Bay. Sample was taken on January 2016, in flood and ebb. TSS was analyzed using gavimetry method based on SNI No. 06-6989.3-2004. Spatial distribution was analyzed by interpolation method- Inverse Distance Weighted (IDW). The concentration range of TSS on January in ebb to tide and tide to ebb was 22.44 mg/L to 261.33 mg/L. The highest distribution in flood was dominated in around of embouchures. It was suspected by inputs of suspended matter from land to the bay. In tide to ebb condition, TSS concentration was high in some areas, such as around the embouchures, midlle and mouth area of bay. The high concentration was suspected by pattern of tidal current in Benoa Bay. The pattern of current in ebb was leaving to the mouth of Benoa Bay, therefore the TSS concentration dispersed to the mouth of the bay.

scholarly journals KONDISI LAMUN BERDASARKAN DISTRIBUSI SPASIAL TOTAL SUSPENDED SOLID (TSS) DI PERAIRAN DESA TANJUNG TIRAM KABUPATEN KONAWE SELATAN

2019 ◽  
Vol 4 (2) ◽  
pp. 61
Author(s):  
Ado Wali ◽  
La Ode Alirman Afu ◽  
. Emiyarti
Keyword(s):  
Total Suspended Solid ◽  
Suspended Solid ◽  
Inverse Distance Weighted ◽  
Purposive Sampling ◽  
Distance Weighted ◽  
Inverse Distance

Perairan Desa Tanjung tiram mengalami perubahan yang sangat kompleks akibat perubahan pemanfaatan lahan di darat dan berdampak pada kondisi lamun. Penelitian ini bertujuan mengetahui kondisi lamun berdasarkan distribusi spasial total Suspended Solid (TSS) di Perairan Desa Tanjung Tiram, Kabupaten Konawe Selatan. Penelitian ini dilaksanakan pada bulan Oktober 2018 - April 2019. Penentuan titik stasiun penelitian menggunakan metode purposive sampling berdasarkan keberadaan ekosistem lamun. Jumlah stasiun sebanyak 3 stasiun dengan 4 titik sampling pada masing-masing staisun. Metode pengambilan data kerapatan lamun menggunakan transek kuadrat 1x1 m2 dengan transek garis sepanjang 100 m secara tegak lurus ke arah laut pada saat surut terendah. Analisis sampel TSS menggunakan metode gravimetri dan distribusi spasial TSS diperoleh melalui interpolasi menggunakan metode Inverse Distance Weighted (IDW). Hasil penelitian menunjukkan bahwa kondisi lamun dengan kerapatan sangat jarang berada pada daerah dermaga (Stasiun II) dengan kandungan TSS memiliki nilai tertinggi dengan rata-rata 1,546 mg/L, sedangkan kondisi lamun dengan kerapatan agak rapat berada pada daerah yang dekat daratan (Stasiun III) dengan kandungan TSS terendah dengan nilai rata-rata 1,45 mg/L.Kata Kunci: KondisiLamun, TSS, Desa Tanjung Tiram

scholarly journals Building Forecast Maps Of Water Quality For Main Rivers And Canals In Tien Giang Province, Vietnam

2015 ◽  
Vol 61 (3) ◽  
pp. 45-52
Author(s):  
Pham Anh Duc ◽  
Truong Thi Thuy Duong ◽  
Dang Quoc Dung
Keyword(s):  
Water Quality ◽  
Interpolation Method ◽  
Oxygen Demand ◽  
Mekong Delta ◽  
Total Suspended Solid ◽  
Water Quality Assessment ◽  
Suspended Solid ◽  
Quality Parameters ◽  
Distance Weighting ◽  
Inverse Distance

Abstract This study aims to enhance the mapping of forecast for water quality assessment in Mekong Delta provinces. The data from 32 sites from main rivers and canals in an area of around 2,482 km2 in Tien Giang Province, Vietnam, were used for calculation and mapping. The ArcGIS 9.3 software, Inverse Distance Weighting (IDW) interpolation method, hydrologic data, and water quality parameters in March (2010-2014) were applied to build the maps showing 2020 water quality predictions for main rivers and canals in Tien Giang Province. The estimation was based on the Water Quality Index (WQI) with 6 parameters such as pH, total suspended solid (TSS), dissolved oxygen (DO), biochemical oxygen demand (BOD), total nitrogen (T_N), and coliform. The results showed that water quality in the studied area in dry season will not be improved by the year 2020. The finding could be a scientific reference for the selection of effective approaches to improve water quality in main rivers and canals in Tien Giang Province.

scholarly journals The Influence of Meteorology-Oceanography Factors on Spatial Distribution of Oil and Grease Pollutant in Donan Estuary, Cilacap

Omni-Akuatika ◽  
2018 ◽  
Vol 14 (3) ◽  
Author(s):  
Mukti Trenggono ◽  
Melody Virginia ◽  
Agung Dhamar Syakti
Keyword(s):  
Spatial Distribution ◽  
Anthropogenic Activities ◽  
High Tide ◽  
Environmental Pollutants ◽  
Total Suspended Solid ◽  
Suspended Solid ◽  
Primary Data ◽  
Volatile Fraction ◽  
High Concentration ◽  
Oil And Grease

Donan Estuary is one of the watershed impacted by anthropogenic activities  which more particularly from  industry and shipping releasing environmental pollutants i.e. oil and grease. Analysis of oil and grease distribution due to meteorology-oceanography factors used spatial analysis method from primary data was taken on June 2017. This research aims to understand the spatial distribution of the concentration of oil and grease in Donan Estuary and to asses the influence of meteorology-oceanography condition on oil and grease distribution. Our research showed oil and grease concentrations varied among the studied area. The higher concentration of oil and grease were found at station 3 while lower concentration was observed at station 12, closed to Penyu Bay. Accordingly, such differences might be due to the different sources of pollutants and different meteorology-oceanography parameter characteristics that affect oil and grease distribution. For instance, oil and grease concentration was inversely proportional to current velocity. Based on tidal current, oil and grease were move forward to the South, West and South East at low tide and move to North and West at high tide. We noted that the direction of wind gave the low influence to oil and grease movement. The high concentration of oil and grease in each station were followed by Total Suspended Solid (TSS) enhancement. On the other hand, temperature has an effect on evaporation process of oil and grease volatile fraction.

scholarly journals ASSESSMENT OF GROUNDWATER QUALITY FROM INDUSTRIAL AND RESIDENTIAL AREAS OF SANGO OTA, NIGERIA

2021 ◽  
Vol 46 (2) ◽  
Author(s):  
O.A. Oguntade ◽  
V.I. I Fesiokwu ◽  
O. S. Sule
Keyword(s):  
Electrical Conductivity ◽  
Drinking Water ◽  
Water Samples ◽  
Total Suspended Solid ◽  
Industrial Area ◽  
Suspended Solid ◽  
Residential Area ◽  
Total Hardness ◽  
Residential Areas ◽  
High Concentration

High concentration of contaminants in drinking water can affect human health. This study assessed quality of groundwater at industrial and residential areas of Sango Ota, Ogun State. Water samples were collected in triplicates from 8 wells at industrial and residential areas and analyzed for its physicochemical properties. The pH, electrical conductivity, total dissolved solid (TDS), nitrate, sulphate, total suspended solid (TSS), total hardness (TH), iron, zinc, copper, lead, nickel, chromium and cadmium concentrations in the water samples were determined following American Public Health Association (APHA) procedure. Results showed that pH of 50 % of the wells were lower than minimum limit of 6.5 recommended by WHO. Sulphate, TH and iron in the water were significantly (p < 0.05) higher at residential area than industrial area. Electrical conductivity exhibited significant (p < 0.01) correlation with TDS (r = 0.701**) and NO32- (r = 0.922**) at residential area. At the industrial area however, concentration of salts in water samples was highly associated with SO42- (r = 0.864**) and Cd (r = 0.587**). Across locations of groundwater, iron and lead were above allowable WHO limits in drinking water. Cadmium was also above drinking limit at location T4 of the residential area. Consumers of groundwater in the study area are prone to health related challenges of heavy metal toxicity.

GIS Based Coal Seam Floor DEM Construction According to Floor Contours and Considering Faults Distribution

2014 ◽  
Vol 1046 ◽  
pp. 516-520
Author(s):  
He Yu Zhang ◽  
Fan Lei ◽  
Fei Huang
Keyword(s):  
Spatial Distribution ◽  
Coal Seam ◽  
Three Dimensional ◽  
Coal Production ◽  
Mine Design ◽  
Coal Seams ◽  
Inverse Distance Weighted ◽  
Coal Deposits ◽  
Distance Weighted ◽  
Inverse Distance

Coal seam floor contours are one of the most important 8 mine maps, and was usually used for coal mine decision-making. However, the graph, which was expressed as lines, has many disadvantages, including inadequate intuitive, poor visibility, and weak in expression of three-dimensional morphology formation. Thus, the readers have to spend more time to reveal the spatial distribution of coal deposits. According to the coal seam floors contours, and considering the constraints of faults in coal seams, the following steps were implemented to acquire coal seam floor DEM, which are: 1) contours discrete; and 2) interpolation using Inverse Distance Weighted method (IDW). The process was easy-manipulated, and the results could reflect the spatial distribution of coal seams in an objective, intuitively, and strong visibility manner. The method could facilitate and guide the analysis of mine design and coal production.

The Ocean Temperature Reconstruction of Center Tropical Cyclone Based on Argo

2013 ◽  
Vol 864-867 ◽  
pp. 2171-2174
Author(s):  
Jiong Zhu ◽  
Jian Cheng Kang
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Interpolation Method ◽  
Temperature Reconstruction ◽  
Sea Surface ◽  
Weighted Interpolation ◽  
Distance Weighted ◽  
Inverse Distance Weighted Interpolation ◽  
Inverse Distance ◽  
Upper Boundary

There is a correlation between sea surface temperature of the upper boundary waters and the intensity of typhoon. This paper analyzes the use of Argo float data and using inverse distance weighted interpolation method to calculate its internal regional sea surface temperature, when typhoon and other data were compared and error analysis. The results showed that: the method is reliable. When you select a point closer distance calculation and spatial distribution of Argo floats as closely as possible, the weight coefficients taken 2, known buoy number is 4-6, the relative error of calculated is less than 0.4%, RMSE error is less than 1.2 in the 0-600m depth layer

scholarly journals Determination of the best interpolation method in estimating the concen-tration of environmental air pollutants in Tehran city in 2015

2019 ◽  
Author(s):  
Akbar Eslami ◽  
Seyed Mehdi Ghasemi
Keyword(s):  
Interpolation Method ◽  
Ambient Air ◽  
Air Concentration ◽  
Pearson Coefficient ◽  
Distance Weighted ◽  
Kolmogorov Smirnov ◽  
Environmental Air ◽  
Inverse Distance ◽  
Better Than

Introduction: Air pollution is one of the important issues in developing coun-tries, due to increased population and industrialization. In this research, the spatial distribution of ambient air concentration such as CO, NO2, SO2, PM2.5, PM10, O3 and Air quality Index (AQI) in Tehran city in 2015 were evaluated using different deterministic ( inverse distance weighted, local polynomial, global polynomial, radial basis functions) and geostatistical (Kriging, Cokrig-ing) methods.   Materials and methods: Root Mean Square Error (RMSE) and Mean Error (ME) using cross-evaluation methods were used to control the accuracy of the interpolation. To find the secondary variables in the cokriging method, the Pearson coefficient of each pollutant was calculated with another pollutant.   Results: The Kolmogorov-Smirnov test showed that all data followed normal distribution. Also the results indicated that in most cases, geostatistical meth-ods were the best methods to estimate ambient air concentration. Finally, after selecting the best interpolation method, the zoning map of the pollutant was drawn with ArcGIS.   Conclusion: The results of 71 methods showed that in most cases, the geosta-tistical method is better than the deterministic method

scholarly journals A Gridded Database for the Spatiotemporal Analysis of Rainfall in Southern Italy (Calabria Region)

2020 ◽  
Vol 2 (1) ◽  
pp. 6
Author(s):  
Tommaso Caloiero ◽  
Roberto Coscarelli ◽  
Gaetano Pellicone
Keyword(s):  
Southern Italy ◽  
Interpolation Method ◽  
Grid Point ◽  
Spatiotemporal Analysis ◽  
Annual Rainfall ◽  
Inverse Distance Weighted ◽  
Calabria Region ◽  
Increasing Trend ◽  
Distance Weighted ◽  
Inverse Distance

In this work, a gridded database was obtained from a rainfall dataset of 129 monthly series collected for the period 1951–2016 in the Calabria region (southern Italy). The Inverse Distance Weighted (IDW) interpolation method was applied to build 603 rainfall grid series with a spatial resolution of 5 km × 5 km. In order to detect possible trends, for each grid point, the seasonal and annual rainfall series were analyzed with the Mann–Kendall non-parametric test and the Theil–Sen estimator. Results showed a decreasing trend for the annual and winter–autumn rainfall and an increasing trend for the summer one.

EVALUATION OF SOLAR ENERGY AND SELECTION OF OPTIMAL TILT ANGLE OF SOLAR PANELS FOR CONDITIONS IN SYRIA

2018 ◽  
pp. 12-27
Author(s):  
A. Ramadan ◽  
V. V. Elistratov
Keyword(s):  
Solar Radiation ◽  
Solar Energy ◽  
Tilt Angle ◽  
Interpolation Method ◽  
Solar Panels ◽  
Inclined Surfaces ◽  
Distance Weighted ◽  
Inclined Surface ◽  
Inverse Distance ◽  
Selection Of

The article suggests the method for calculating the solar radiation on a horizontal surface of the territory of Syria which has been developed using the weather database of NASA and ArcGIS software to create the atlases of Syria. In order to compute the solar radiation on an inclined surface for Syria, the following steps were taken. Firstly, the method proposed by Liu and Jordan (1962) and developed by Klein (1977) was used and applied at a point with a latitude of 33º and a longitude of 36º in Syria to calculate the total average daily monthly and yearly solar radiation on an inclined surface and its components (direct, diffuse and ground reflected). Secondly, the annual and monthly values of the optimal tilt angle of the solar panels were determined. Thirdly, verification of reliability and accuracy of calculations was carried out. Finally, using the interpolation method (inverse distance weighted IDW) in ArcGIS, the method proposed was applied to 63 points that covered the territory of Syria. Thus, we developed an Atlas of Syria of solar radiation on an inclined surface which characterized by the optimal tilt angles of solar panels and the maximum annual solar radiation on an inclined surface under these angles. Solar Radiation Atlas of Syria shows that the annual optimal tilt angle of the solar panels varies in the range from 23º to 28º and the maximum average annual solar radiation on an inclined surface under these angles varies in the range from 1859 to 2069 kWh/m2·year. In addition, on the basis of the NASA meteorological database, we determined the average total gross (natural) potential of solar energy on optimal inclined surfaces in Syria which is 362.1·103 TWh per year.

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