scholarly journals Kualitas perairan Natuna pada musim transisi

DEPIK ◽  
2014 ◽  
Vol 3 (1) ◽  
Author(s):  
Mariska Astrid Kusumaningtyas ◽  
Rikha Bramawanto ◽  
August Daulat ◽  
Widodo S. Pranowo
Keyword(s):  
Water Quality ◽  
Suspended Solids ◽  
Total Suspended Solids ◽  
Secchi Disk

Abstrak. Perairan Natuna, khususnya pada Kawasan Konservasi Laut Daerah (KKLD) I diprioritaskan untuk mendukung kegiatan perikanan berkelanjutan, sehingga penting diketahui kualitasperairannya. Penelitian ini bertujuan untuk mengetahui karakteristik kualitas air berdasarkan parameter fisika maupun kimia sebagai basis data terkini mengenai kualitas perairan Natuna pada musim transisi. Penelitian dilakukan di 31 stasiun pada bulan November 2012. Parameter kualitas air yang diukur antara lain kecerahan, derajat keasaman (pH), oksigen terlarut, suhu, salinitas, padatan tersuspensi total atau Total Suspended Solids (TSS) dan nutrien (nitrat, fosfat, silikat). Parameter pH, oksigen terlarut, suhu, dan salinitas diukur secara in-situ menggunaan alat water quality meter (TOA-DKK), kecerahan diukur menggunakan secchi disk, sedangkan sampel air di bawa ke laboratorium untuk dianalisis konsentrasi nutrien dan TSS. Hasil penelitian menunjukkan nilai kisaran kecerahan yaitu 2-20,9 (m), pH 8,09-8,27, oksigen terlarut 6,34-7,96 (mg/l), suhu 29,2-30,6 (°C), salinitas 27,9-30,4 (PSU), TSS <3-26 (mg/l), nitrat 0,005-0,078 (mg/l), fosfat <0,005-0,015 (mg/l) dan silikat 0,045-0,704 (mg/l). Hasil penelitian dibandingkan dengan baku mutu air laut untuk biota laut berdasarkan Keputusan Menteri Lingkungan Hidup Nomor 51 Tahun 2004. Berdasarkan hasil penelitian, kondisi perairan Natuna masih tergolong baik untuk menunjang kehidupan biota laut.Kata kunci: Parameter kimia; Parameter fisika; Natuna; musim transisi

scholarly journals Can Multispectral Information Improve Remotely Sensed Estimates of Total Suspended Solids? A Statistical Study in Chesapeake Bay

2018 ◽  
Vol 10 (9) ◽  
pp. 1393 ◽  
Author(s):  
Nicole DeLuca ◽  
Benjamin Zaitchik ◽  
Frank Curriero
Keyword(s):  
Water Quality ◽  
Random Forest ◽  
Chesapeake Bay ◽  
Suspended Solids ◽  
Total Suspended Solids ◽  
Single Band ◽  
Random Forest Model ◽  
Validation Dataset ◽  
Forest Model

Total suspended solids (TSS) is an important environmental parameter to monitor in the Chesapeake Bay due to its effects on submerged aquatic vegetation, pathogen abundance, and habitat damage for other aquatic life. Chesapeake Bay is home to an extensive and continuous network of in situ water quality monitoring stations that include TSS measurements. Satellite remote sensing can address the limited spatial and temporal extent of in situ sampling and has proven to be a valuable tool for monitoring water quality in estuarine systems. Most algorithms that derive TSS concentration in estuarine environments from satellite ocean color sensors utilize only the red and near-infrared bands due to the observed correlation with TSS concentration. In this study, we investigate whether utilizing additional wavelengths from the Moderate Resolution Imaging Spectroradiometer (MODIS) as inputs to various statistical and machine learning models can improve satellite-derived TSS estimates in the Chesapeake Bay. After optimizing the best performing multispectral model, a Random Forest regression, we compare its results to those from a widely used single-band algorithm for the Chesapeake Bay. We find that the Random Forest model modestly outperforms the single-band algorithm on a holdout cross-validation dataset and offers particular advantages under high TSS conditions. We also find that both methods are similarly generalizable throughout various partitions of space and time. The multispectral Random Forest model is, however, more data intensive than the single band algorithm, so the objectives of the application will ultimately determine which method is more appropriate.

scholarly journals Water quality in the Knysna estuary

Koedoe ◽  
1996 ◽  
Vol 39 (1) ◽  
Author(s):  
I.A. Russell
Keyword(s):  
Water Quality ◽  
Suspended Solids ◽  
Ad Hoc ◽  
Total Suspended Solids ◽  
Published Data ◽  
Secchi Disk ◽  
Secchi Disk Depth ◽  
Long Term Changes ◽  
Remedial Actions

Measurements of water temperature, salinity, pH, dissolved oxygen, secchi disk depth, turbidity and total suspended solids were taken monthly in the Knysna estuary between 1991 and 1994. Measurements of turbidity and total suspended solids of waters entering the Knysna estuary via rivers and man-made inlets were also taken on an ad hoc basis. These results are described and compared to published data on past water quality conditions. No clear long-term changes in water quality in the estuary were evident. High inputs of sediments from minor catchments indicate the necessity for remedial actions.

Seagrass depth range and water quality in southern Moreton Bay, Queensland, Australia

1996 ◽  
Vol 47 (6) ◽  
pp. 763 ◽  
Author(s):  
EG Abal ◽  
WC Dennison
Keyword(s):  
Water Quality ◽  
Chlorophyll A ◽  
Suspended Solids ◽  
Light Attenuation ◽  
River Mouth ◽  
Total Suspended Solids ◽  
Quality Parameters ◽  
Depth Range ◽  
Moreton Bay ◽  
A Site

Correlations between water quality parameters and seagrass depth penetration were developed for use as a biological indicator of integrated light availability and long-term trends in water quality. A year-long water quality monitoring programme in Moreton Bay was coupled with a series of seagrass depth transects. A strong gradient between the western (landward) and eastern (seaward) portions of Moreton Bay was observed in both water quality and seagrass depth range. Higher concentrations of chlorophyll a, total suspended solids, dissolved and total nutrients, and light attenuation coefficients in the water column and correspondingly shallower depth limits of the seagrass Zostera capricorni were observed in the western portions of the bay. Relatively high correlation coefficient values (r2 > 0.8) were observed between light attenuation coefficient, total suspended solids, chlorophyll a, total Kjeldahl nitrogen and Zostera capricorni depth range. Low correlation coefficient values (r2 < 0.8) between seagrass depth range and dissolved inorganic nutrients were observed. Seagrasses had disappeared over a five-year period near the mouth of the Logan River, a turbid river with increased land use in its watershed. At a site 9 km from the river mouth, a significant decrease in seagrass depth range corresponded to higher light attenuation, chlorophyll a, total suspended solids and total nitrogen content relative to a site 21 km from the river mouth. Seagrass depth penetration thus appears to be a sensitive bio-indicator of some water quality parameters, with application for water quality management.

scholarly journals Limnology of Merbok estuary, Kedah, Malaysia

2015 ◽  
Vol 41 (1) ◽  
pp. 13-19
Author(s):  
Kaniz Fatema ◽  
Wan Maznah Wan Omar ◽  
Mansor Mat Isa
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Suspended Solids ◽  
Total Suspended Solids ◽  
Quality Parameters ◽  
The Other ◽  
Wet Season ◽  
Hand Temperature ◽  
Do Concentration ◽  
Merbok Estuary

Water quality in three different stations of Merbok estuary was investigated limnologically from October, 2010 to September, 2011. Water temperature, transparency and total suspended solids (TSS) varied from 27.45 - 30.450C, 7.5 - 120 cm and 10 -140 mg/l, respectively. Dissolved Oxygen (DO) concentration ranged from 1.22-10.8 mg/l, while salinity ranged from 3.5-35.00 ppt. pH and conductivity ranged from 6.35 - 8.25 and 40 - 380 ?S/cm, respectively. Kruskal Wallis H test shows that water quality parameters were significantly different among the sampling months and stations (p<0.05). This study revealed that DO, salinity, conductivity and transparency were higher in wet season and TSS was higher in dry season. On the other hand, temperature and pH did not follow any seasonal trends.Bangladesh J. Zool. 41(1): 13-19, 2013

scholarly journals WATER QUALITY INDEX OF TIGRIS RIVER WITHIN BAGHDAD CITY: A REVIEW

2021 ◽  
Vol 25 (3) ◽  
pp. 34-43
Author(s):  
Tamarah A. Adnan ◽  
◽  
Eman A. Mohammed ◽  
Abdul-Sahib T. Al-Madhhachi ◽  
◽  
...  
Keyword(s):  
Water Quality ◽  
Fecal Coliform ◽  
Suspended Solids ◽  
Review Paper ◽  
Total Suspended Solids ◽  
Total Hardness ◽  
Iron Ion ◽  
The North ◽  
Tigris River ◽  
The City

Tigris River is the only potable source in Baghdad city therefor many water treatment plants were built on the banks such as Al-Karkh, Sharq Dijla, Al-Sadr, Al-Wathba, Al-Karama, AlQadisia, Al-Dora, Al-Wahda, and Al-Rashed project. Tigris River suffers from the pollution that comes from various sources such as Industry, domestic sanitation, and farming activities therefore several indices were used to calculate water quality within Baghdad to convert physicochemical parameters of water to a single value that represents the river status (good, bad, very bad, etc..).The aim of this review paper to show the results of previous studies about the water quality for the Baghdad region. Most results showed that water quality was good in the north of the city of Baghdad and bad in the south of Baghdad. The deterioration of water quality was due to many reasons such as the discharge of wastewater directly into the river without pretreatment, increase in (Electic conductivity, Turbidity, and total suspended solids, total hardness, Iron ion, the fecal coliform)concentrations, and Climate change, therefore, Tigris River needs intensive treatment before using by humans.

Uncertainties of spectral in situ measurements in wastewater using different calibration approaches

2006 ◽  
Vol 53 (12) ◽  
pp. 187-197 ◽  
Author(s):  
L. Rieger ◽  
G. Langergraber ◽  
H. Siegrist
Keyword(s):  
Suspended Solids ◽  
Wastewater Treatment Plants ◽  
Total Suspended Solids ◽  
Data Sets ◽  
Global Calibration ◽  
Nitrite Nitrogen ◽  
Calibration Methods ◽  
Using Data ◽  
Nitrate And Nitrite

Three calibration methods were applied to UV/VIS spectra recorded in the influent of six wastewater treatment plants (WWTPs) to measure total COD (CODtot), filtered COD (CODfil), nitrate and nitrite nitrogen (NOx-N) and total suspended solids (TSS). It could be shown that a calibration of the sensor using data sets from four Swiss WWTPs leads to an improvement of the precision in comparison to the global calibration provided by the manufacturer. A calibration to the specific wastewater matrix always improves the results and gives the highest accuracy. For CODtot a mean coefficient of variation CVx of 12.5% could be reached, whereas for NOx-N only weak results were achieved (average CVx=36%).

PERFORMANCE EVALUATION OF A DEVELOPED PADDLE AERATOR ON CATFISH EFFLUENTS IN LAGOS STATE, NIGERIA

2017 ◽  
Vol 16 (1) ◽  
pp. 75-85
Author(s):  
O. E. OMOFUNMI ◽  
J. K. . ADEWUMI ◽  
A. F. ADISA ◽  
S. O. ALEGBELEYE
Keyword(s):  
Water Quality ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Total Suspended Solids ◽  
Dilution Ratio ◽  
Paddle Wheel ◽  
Lagos State ◽  
Total Ammonia ◽  
The Impact ◽  
Natural Purification

Catfish production is one of the largest segments of fish culture in Lagos State, Nigeria. However, catfish effluents, which usually deteriorate the environment, need to be controlled. The effect of paddle-wheel aerator in catfish effluent was evaluated. The volume of catfish effluent was collected into two basins and diluted at given ratios. The paddle-wheel aerator was installed in one basin, while another basin served as control in determining the impact of paddle wheel aerator on catfish effluents. Water qualities such as Total Suspended Solids (TSS), Total Nitrogen (TN), Total Phosphorus (TP), Total Ammonia (TNH3) and Nitrite (NO2-N) and Biochemical oxygen demand (BOD5) examined and ana-lysed. Results indicated that paddle-wheel aerator reduced TSS (24.4±1.5 %), TN2-N (53.3±1.2 %) , TNH3-N (65.2±1.2 %) , NO2-N (97.1±1.1 %) , TP (61.8±1.1 %) and BOD5 (54 ±1.5 %). com-pared with natural purification 33.9±1.6 % of TSS, 22.7±1.4 % of TN2-N, 29.3±1.6 % of TNH3-N, 53.9±1.2 % of NO2-N, 21.6±1.5 % of TP and 15.4±1.6 % of BOD5 at the same dilution ratio There were significant different (P ≤0.05) between paddle wheel aerator and natural purification in concen-trations reduction. The paddle wheel aerator was found to be relevant in the water quality improve-ment and thus recommend for small and medium scale fish farmers in controlling effluents.

Assessment of Freshwater Inflow and Water Quality for an Urbanized, Subtropical Estuary (Lake Worth Lagoon, Florida, USA)

2018 ◽  
Vol 52 (4) ◽  
pp. 19-31
Author(s):  
Christopher Buzzelli ◽  
Zhiqiang Chen ◽  
Peter Doering ◽  
Amanda Kahn
Keyword(s):  
Water Quality ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Suspended Solids ◽  
Environmental Parameters ◽  
Total Suspended Solids ◽  
South Florida ◽  
Freshwater Inflow ◽  
Spatial And Temporal Variability ◽  
Palm Beach County

Abstract Coastal water bodies are impacted by watershed alterations, increased population density, modifications to inlets and shorelines, climatic periodicity, and increases in external material loads. Estuaries such as Lake Worth Lagoon (LWL) in south Florida possess all these attributes. The LWL watershed extends from the southeastern portion of Lake Okeechobee through Palm Beach County, where it meets the lagoon. Palm Beach County Department of Environmental Resources Management recognizes the social and ecological importance of the ~36 km lagoon and aims to maintain suitable water and habitat quality for all stakeholders. Recent declines and shifts of seagrass distribution along the lagoon prompted a step toward better understanding the water quality patterns of the system. In support of these efforts, this study assessed bathymetry, inflow, flushing, and water quality attributes (chlorophyll a, salinity, total nitrogen, total phosphorus, total suspended solids, turbidity) using data collected along a series of 14 midlagoon stations from 2007 to 2015. Salinity in the North Segment was higher and less variable because of proximity to Palm Beach Inlet. Although concentrations of chlorophyll a, total nitrogen, and total phosphorus correlated with freshwater inflow, turbidity and total suspended solids were not. Fast flushing of the lagoon on a scale of days likely precludes water quality issues common to many estuaries with higher resident times. However, the combination of landscape-scale water management, a shoreline that is almost 70% modified by hard structures, and changes in essential nearshore habitats, introduces new levels of uncertainty to both the understanding and management of LWL. From this study, increased knowledge of relationships among water quality parameters and their spatial and temporal variability in LWL provides points of reference from which targeted studies can be developed to explore links between environmental parameters and responses of key organisms in this unique system.

scholarly journals Linking Changes in Land Cover and Land Use of the Lower Mekong Basin to Instream Nitrate and Total Suspended Solids Variations

2020 ◽  
Vol 12 (7) ◽  
pp. 2992 ◽  
Author(s):  
Kongmeng Ly ◽  
Graciela Metternicht ◽  
Lucy Marshall
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Land Cover ◽  
Suspended Solids ◽  
Total Suspended Solids ◽  
Mekong River ◽  
Forest Land ◽  
Lulc Changes ◽  
Correlation Analyses ◽  
Forest Land Cover

Population growth and economic development are driving changes in land use/land cover (LULC) of the transboundary Lower Mekong River Basin (LMB), posing a serious threat to the integrity of the river system. Using data collected on a monthly basis over 30 years (1985–2015) at 14 stations located along the Lower Mekong river, this study explores whether spatiotemporal relationships exist between LULC changes and instream concentrations of total suspended solids (TSS) and nitrate—as proxies of water quality. The results show seasonal influences where temporal patterns of instream TSS and nitrate concentrations mirror patterns detected for discharge. Changes in LULC influenced instream TSS and nitrate levels differently over time and space. The seasonal Mann–Kendall (SMK) confirmed significant reduction of instream TSS concentrations at six stations (p < 0.05), while nitrate levels increased at five stations (p < 0.05), predominantly in stations located in the upper section of the basin where forest areas and mountainous topography dominate the landscape. Temporal correlation analyses point to the conversion of grassland (r = −0.61, p < 0.01) to paddy fields (r = 0.63, p < 0.01) and urban areas (r = 0.44, p < 0.05) as the changes in LULC that mostly impact instream nitrate contents. The reduction of TSS appears influenced by increased forest land cover (r = −0.72, p < 0.01) and by the development and operation of hydropower projects in the upper Mekong River. Spatial correlation analyses showed positive associations between forest land cover and instream concentrations of TSS (r = 0.64, p = 0.01) and nitrate (r = 0.54, p < 0.05), indicating that this type of LULC was heavily disturbed and harvested, resulting in soil erosion and runoff of nitrate rich sediment during the Wet season. Our results show that enhanced understanding of how LULC changes influence instream water quality at spatial and temporal scales is vital for assessing potential impacts of future land and water resource development on freshwater resources of the LMB.

Modelling of suspended sediment in a weir reach using EFDC model

2015 ◽  
Vol 73 (7) ◽  
pp. 1583-1590 ◽  
Author(s):  
Gijung Pak ◽  
Kristine Joy B. Mallari ◽  
Jongrak Baek ◽  
Deokwoo Kim ◽  
Hwansuk Kim ◽  
...  
Keyword(s):  
Water Quality ◽  
Suspended Solids ◽  
Water Quality Management ◽  
Total Suspended Solids ◽  
Rainfall Event ◽  
Hydraulic Structures ◽  
Rainfall Events ◽  
Efdc Model ◽  
Environmental Fluid ◽  
Modelling System

Construction of hydraulic structures often leads to alteration of river dynamics and water quality. Suspended solids entering the upstream of the weir cause adverse effects to the hydroecological system and, therefore, it is necessary to build a modelling system to predict the changes in the river characteristics for proper water quality management. In this study, the discharges and total suspended solids upstream and downstream of the Baekje Weir installed in Geum River, Korea, was modelled using the environmental fluid dynamics code (EFDC) model. The resulting trend of four rainfall events shows that as rainfall increases, the total suspended solids (TSS) concentration increases as well. For the two larger events, at the upstream of the weir, TSS was observed to decrease or remain constant after the rainfall event depending on the lowering of the open gate. At the downstream, TSS supply was controlled by the weir during and after the rainfall event resulting in decline in the TSS concentration. The modelling produced good results for discharge based on %Diff. (4.37–6.35), Nash–Sutcliffe efficiency (NSE) (0.94–0.99) and correlation coefficient (r) (0.97–0.99) values as well as for TSS with acceptable values for %Diff. (12.08–14.11), NSE (0.75–0.81) and r (0.88–0.91), suggesting good applicability of the model for the weir reach of the river in the study site.

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