Developing a two-step retrieval method for estimating total suspended solid concentration in Chinese turbid inland lakes using Geostationary Ocean Colour Imager (GOCI) imagery

2015 ◽  
Vol 36 (5) ◽  
pp. 1385-1405 ◽  
Author(s):  
Heng Lyu ◽  
Jie Zhang ◽  
Guihong Zha ◽  
Qiao Wang ◽  
Yunmei Li
Keyword(s):  
Total Suspended Solid ◽  
Suspended Solid ◽  
Solid Concentration ◽  
Ocean Colour ◽  
Retrieval Method ◽  
Inland Lakes ◽  
Suspended Solid Concentration

scholarly journals Influence of Rainfall Characteritics on Total Suspended Solid Concentration

2018 ◽  
Vol 1049 ◽  
pp. 012039
Author(s):  
N A Zuraini ◽  
N Alias ◽  
N Abd Rahman ◽  
S Harun ◽  
Z Ibrahim ◽  
...  
Keyword(s):  
Total Suspended Solid ◽  
Suspended Solid ◽  
Solid Concentration ◽  
Suspended Solid Concentration

scholarly journals Influence of Rainfall Spatial Distribution on Total Suspended Solid (TSS in Ci lutung Watershed

2018 ◽  
Vol 73 ◽  
pp. 03015
Author(s):  
Anis Taufik Ibrahim ◽  
Eko Kusratmoko
Keyword(s):  
Spatial Distribution ◽  
Distribution Pattern ◽  
Total Suspended Solid ◽  
Extraction Process ◽  
Suspended Solid ◽  
Spatial Distribution Pattern ◽  
Coefficient Of Determination ◽  
Solid Concentration ◽  
Suspended Solid Concentration ◽  
Rainfall Spatial Distribution

The study aims to analyze the influence of rainfall spatial distribution on total suspended solid and the connection between total suspended solid with river stream discharge on the condition of physical characteristics in Cilutung stream area, Majalengka regency. The extraction process of Himawari 8 Imagery used to find out the rainfall spatial distribution pattern while taking samples in April, 2018. Curve Number Data have the form of hydrologic soil groups and land use required to give score to each five sub-watershed that has been delineated for region physical characteristic. The Rainfall spatial distribution pattern has strong correlation with total suspended solid concentration generated through runoff discharge with coefficient of determination number r2 = 0,8416. The varied rainfall spatial distribution pattern take part to the occurrence of fluctuation of total suspended solid concentration with average 190 mg/l, and amount of total suspended sediment yield 820 kg/m3.

scholarly journals EFICIÊNCIA DE DIFERENTES ELEMENTOS FILTRANTES NA PREVENÇÃO DE OBSTRUÇÃO DE GOTEJADORES

Irriga ◽  
2003 ◽  
Vol 8 (1) ◽  
pp. 78-87 ◽  
Author(s):  
José Euclides Stipp Paterniani ◽  
Marcos Eduardo Scatolini
Keyword(s):  
Irrigation Water ◽  
Suspended Solid ◽  
Filter Element ◽  
Solid Concentration ◽  
Algae Removal ◽  
Mesh Screen ◽  
Suspended Solid Concentration ◽  
E Mail ◽  
Synthetic Fabric ◽  
Continuous Average

EFICIÊNCIA DE DIFERENTES ELEMENTOS FILTRANTES NA PREVENÇÃO DE OBSTRUÇÃO DE GOTEJADORES   José Euclides Stipp Paterniani Marcos Eduardo ScatoliniFaculdade de Engenharia Agrícola, Universidade Estadual de Campinas, Campinas, SP. CP 6011, CEP 13083-970, E-mail: [email protected]   1 RESUMO  Durante ensaios para verificação de eficiência de retenção de algas em filtros de discos 120 MESH, tela 120 MESH e manta sintética não tecida, foram avaliados o grau de obstrução de gotejadores de labirinto com fluxo turbulento e vazão nominal de 4 L.h-1 e 8 L.h-1. Para determinação da obstrução causada por impurezas não retidas no meio filtrante foram avaliadas a evolução da vazão e da uniformidade estatística dos gotejadores submetidos aos diferentes meios filtrantes durante um período de 22 semanas durante 4 horas diárias e comparadas com uma parcela testemunha sem elemento filtrante. Os resultados mostraram que houve diferença significativa entre o elemento de discos, que apresentou maior uniformidade estatística, os filtros de manta e tela com valores intermediários e a testemunha que apresentou menor uniformidade estatística. No entanto, para caracterizar de maneira definida a diferença no desempenho dos elementos filtrantes, estes valores deveriam vir acompanhados de uma redução contínua na vazão média dos tratamentos, o que foi observado apenas para o elemento de tela com o gotejador de 4 L.h-1. As demais variações da uniformidade estatística foram temporais, provavelmente devido a obstruções  temporárias ocasionadas por variações da concentração de sólidos suspensos na água de irrigação.  UNITERMOS: Filtragem, Gotejamento, Qualidade da água.   PATERNIANI, J.E.S.; SCATOLINI, M.E. EFFICIENCY OF DIFFERENT FILTER ELEMENTS TO PREVENT TRICKLE CLOGGING   2 ABSTRACT  This work aimed to verify the efficiency of algae removal in disks 120 mesh, screen 120  mesh, and non woven synthetic fabric filters. It was evaluated the degree of clogging of turbulent flow drippers on 4 L.h-1 and 8 L.h-1 outflow. For blockage determination the outflow evolution  and statistics uniformity (Us) of the dripper have been evaluated when submitted to different filter media over 22 weeks, 4 daily hours compared to a control without the filter element. The results indicated significant differences among the elements. The disk element presented greater statistic uniformity. The screen filter and the non woven synthetic fabric element presented intermediate values whereas the parcel with no filter element (control) presented minor statistic uniformity. However, in order to characterize performance differences among them, values should be presented along with a  continuous average outflow reduction in all treatments. This pattern was observed only for the screen filter and 4 L.h-1 drippers. The statistics uniformity variation has been probably caused by temporary blockages due to variation in suspended solid concentration in irrigation water.  KEYWORDS: filtration, drip irrigation, water quality. 

scholarly journals TOTAL SUSPENDED SOLID DISTRIBUTION ANALYSIS USING SPOT-6 DATA IN SEGARA ANAKAN, CILACAP

2018 ◽  
Vol 5 (2) ◽  
pp. 177 ◽  
Author(s):  
Aisya Jaya Dhannahisvara ◽  
Hartono Harjo ◽  
Pramaditya Wicaksono ◽  
Ferman Setia Nugroho
Keyword(s):  
Chlorophyll A ◽  
Empirical Model ◽  
Field Data ◽  
Near Infrared ◽  
Total Suspended Solid ◽  
Suspended Solid ◽  
Distribution Analysis ◽  
Chlorophyll A Concentration ◽  
Accuracy Test ◽  
Suspended Solid Concentration

Spatial distribution and concentration of Total Suspended Solid (TSS) is one of the coastal parameters which are required to be examined in order to understand the quality of the water. Rapid development of remote sensing technology has resulted in the emergence of various methods to estimate TSS concentration. SPOT-6 data has spatial, spectral, and temporal characteristics that can be used to estimate TSS concentration. The purposes of this research are (1) to determine the best method for estimating TSS concentration, (2) to map TSS distribution, and (3) to determine the correlation between TSS concentration and chlorophyll-a concentration using SPOT-6 data in Segara Anakan. The estimation of TSS concentration in this research was performed using empirical model built from SPOT-6 and TSS field data. Bands used in this research are single band data (blue, green, red, and near infrared) and transformed bands such as band ratio (12 combinations), Normalized Difference Suspended Solid Index (NDSSI), and Suspended Solid Concentration Index (SSC). The result shows that blue, green, red, and near infrared bands and SSC index significantly correlated to TSS. Afterwards, regression analysis was performed to determine the function that can be used to predict TSS concentration using SPOT-6 data. Regression function used are linear and non-linear (exponential, logarithmic, 2nd order polynomial, and power). The best model was chosen based on the accuracy assessment using Standard Error of Estimate (SE). The selected model was used to calculate total TSS concentration and was correlated with chlorophyll-a field data. The result of accuracy test shows that the model from blue band has an accuracy of 70.68 %, green band 70.68 %, red band 75.73 %, near infrared band 65.58 %, and SSC 73.67 %. The accuracy test shows that red band produced the best prediction model for mapping TSS concentration distribution. The total TSS concentration, which was calculated using red band empirical model, is estimated to be 6.13 t. According to the correlation test, TSS concentration in Segara Anakan has no significant correlation with chlorophyll-a concentration, with a coefficient correlation value of -0.265.

scholarly journals Analysis of the influence of rapid filter cycle interruption on filtrate quality

2021 ◽  
Vol 11 (9) ◽  
Author(s):  
M. Zielina
Keyword(s):  
Removal Efficiency ◽  
Filtration Rate ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Suspended Solid ◽  
Particle Removal ◽  
Solid Concentration ◽  
Suspended Solid Concentration ◽  
Filter Cycle

AbstractThe article presents research carried out on a sand/anthracite filter in a water treatment plant in Cracow in the south of Poland. These studies show that shutting down the filter after only three hours of operation, setting it aside for four hours and restarting without backwashing did not cause any visible deterioration in the quality of the produced filtrate. Stopping the same filter for four hours, however, after 68 h of operation, visible deterioration in the quality of the filtrate can be observed. After a significant initial deterioration, the quality of the filtrate slowly improved and after a few hours, it reached a level comparable to that before the filter was taken out of service. This was probably the result of characteristic changes in shear stress at the boundary of the deposit and flowing water in the capillaries, which accompanied changes of filtration rate. Decrease in the removal efficiency of coarser particles lasted longer and was greater than that of finer particles. Decrease in particle removal efficiency after restarting the dirty filter was difficult to identify by turbidity measurements, but clearly identifiable by measuring suspended solid concentration and the number of coarser particles. Interrupting the operation of a rapid filter shortly after it has been backwashed should not significantly reduce its efficiency, but after prolonged operation, it may adversely affect the quality of the filtrate.

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