Applying adaptive prediction to sea-water quality measurements

2009 ◽  
Vol 36 (3) ◽  
pp. 6773-6779 ◽  
Author(s):  
E. Hatzikos ◽  
J. Hätönen ◽  
N. Bassiliades ◽  
I. Vlahavas ◽  
E. Fournou
Keyword(s):  
Water Quality ◽  
Sea Water ◽  
Adaptive Prediction ◽  
Quality Measurements

MEASURES FOR ENVIRONMENT CONSERVATION IN ENCLOSED COASTAL SEAS

2017 ◽  
Author(s):  
Keizo Negi ◽  
Keizo Negi ◽  
Takuya Ishikawa ◽  
Takuya Ishikawa ◽  
Kenichiro Iba ◽  
...  
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Water Mass ◽  
Sea Water ◽  
Red Tide ◽  
Water Environment ◽  
Quality Standard ◽  
Tokyo Bay ◽  
View Point ◽  
High Concentration

Japan experienced serious water pollution during the period of high economic growth in 1960s. It was also the period that we had such damages to human health, fishery and living conditions due to red tide as much of chemicals, organic materials and the like flowing into the seas along the growing population and industries in the coastal areas. Notable in those days was the issues of environment conservation in the enclosed coastal seas where pollutants were prone to accumulate inside due to low level of water circulation, resulting in the issues including red tide and oxygen-deficient water mass. In responding to these issues, we implemented countermeasures like effluent control with the Water Pollution Control Law and improvement/expansion of sewage facilities. In the extensive enclosed coastal seas of Tokyo Bay, Ise Bay and the Seto Inland Sea, the three areas of high concentration of population, we implemented water quality total reduction in seven terms from 1979, reducing the total quantities of pollutant load of COD, TN and TP. Sea water quality hence has been on an improvement trend as a whole along the steady reduction of pollutants from the land. We however recognize that there are differences in improvement by sea area such as red tide and oxygen-deficient water mass continue to occur in some areas. Meanwhile, it has been pointed out that bio-diversity and bio-productivity should be secured through conservation/creation of tidal flats and seaweed beds in the view point of “Bountiful Sea” To work at these challenges, through the studies depending on the circumstances of the water environment in the enclosed coastal seas, we composed “The Policy of Desirable State of 8th TPLCS” in 2015. We have also added the sediment DO into the water quality standard related to the life-environmental items in view of the preservation of aquatic creatures in the enclosed water areas. Important from now on, along the Policy, is to proceed with necessary measures to improve water quality with good considerations of differences by area in the view point of “Beautiful and bountiful Sea”.

First flush effects in an urban catchment area in Aalborg

1998 ◽  
Vol 37 (1) ◽  
pp. 251-257 ◽  
Author(s):  
Torben Larsen ◽  
Kirsten Broch ◽  
Margit Riis Andersen
Keyword(s):  
Water Quality ◽  
Catchment Area ◽  
Quality Parameters ◽  
Average Concentration ◽  
First Flush ◽  
Storm Events ◽  
Urban Catchment ◽  
Discharge Measurements ◽  
Quality Measurements

The paper describes the results of measurements from a 2 year period on a 95 hectare urban catchment in Aalborg, Denmark. The results of the rain/discharge measurements include 160 storm events corresponding to an accumulated rain depth of totally 753 mm. The water quality measurements include 15 events with time series of concentration of SS, COD, BOD, total nitrogen and total phosphorus. The quality parameters showed significant first flush effects. The paper discusses whether either the event average concentration or the accumulated event mass is the most appropriate way to characterize the quality of the outflow.

scholarly journals Spring and surface water quality of the Cyprus ophiolites

2002 ◽  
Vol 6 (5) ◽  
pp. 797-817 ◽  
Author(s):  
C. Neal ◽  
P. Shand
Keyword(s):  
Water Quality ◽  
Sea Water ◽  
Stream Water ◽  
Chemical Reactivity ◽  
Surface Water Quality ◽  
Calcium Sulphate ◽  
Stream Water Quality ◽  
Troodos Ophiolite ◽  
High Calcium ◽  
Hydrolysis Of

Abstract. A survey of surface, spring and borehole waters associated with the ophiolite rocks of Cyprus shows five broad water types (1) Mg-HCO3, (2) Na-SO4-Cl-HCO3, (3) Na-Ca-Cl-SO4-OH-CO3, (4) Na-Cl-SO4 and (5) Ca-SO4. The waters represent a progression in chemical reactivity from surface waters that evolve within a groundwater setting due to hydrolysis of the basic/ultrabasic rock as modified by CO2-weathering. An increase in salinity is also observed which is due to mixing with a saline end-member (modified sea-water) and dissolution of gypsum/anhydrite. In some cases, the waters have pH values greater than 11. Such high values are associated with low temperature serpentinisation reactions. The system is a net sink for CO2. This feature is related not only to the hydrolysis of the primary minerals in the rock, but also to CaCO3 or Ca-Mg-CO3 solubility controls. Under hyperalkaline conditions, virtually all the carbon dioxide is lost from the water due to the sufficiently high calcium levels and carbonate buffering is then insignificant. Calcium sulphate solubility controls may also be operative when calcium and sulphate concentrations are particularly high. Keywords: Cyprus, Troodos, ophiolite, serpentinisation, spring, stream, water quality, bromide, iodine, boron, trace elements, hyperalkaline.

Analysis of water pollution and evaluation of purification measures in an urban river basin

1996 ◽  
Vol 34 (12) ◽  
pp. 33-40 ◽  
Author(s):  
Y. Hosoi ◽  
Y. Kido ◽  
H. Nagira ◽  
H. Yoshida ◽  
Y. Bouda
Keyword(s):  
Water Quality ◽  
River Water ◽  
River Basin ◽  
Urban Areas ◽  
River Flow ◽  
Sea Water ◽  
Water Quality Management ◽  
River Water Quality ◽  
Urban River ◽  
Pollutant Load

The inflow of pollutant load from urban areas and the stagnation of water due to sea water intrusion cause the deterioration of river water quality in tidal zone. In order to improve water quality, various measures such as the reduction of pollutant load by sewage systems, discharge control from sewage treatment plants considering river flow, nutrient removal by aquatic plants, and the dredging of bottom sediments have been examined. The choice of these measures depends on the situation of the river environment and finances. In this study, a field survey was carried out in a typical urban river basin, first. Secondly, on the basis of this survey, a mathematical model was formed to simulate flow and water quality. Several purification alternatives designed for the investigated river basin were comparatively evaluated from the viewpoint of the effect of water quality improvement and their cost. Finally, they were prioritized. Through this case study, a planning process of river water quality management was shown.

scholarly journals WATER QUALITY OF POST CONTAMINATION OF MARINE DEBRIS IN THE KUTA BEACH OF BALI

2017 ◽  
Vol 9 (1) ◽  
pp. 57
Author(s):  
Aprizon Putra ◽  
Semeidi Husrin
Keyword(s):  
Water Quality ◽  
Sea Water ◽  
Measurement Data ◽  
Ocean Waves ◽  
Quality Parameters ◽  
Marine Debris ◽  
Physical Parameters ◽  
White Sand ◽  
Foreign Countries ◽  
Value Range

<p><em>Kuta Beach of Bali is one of the top tourist destination for a vacation in Bali Island.</em><em> </em><em>The beauty of the beach with white sand,</em><em> </em><em>ocean waves are excellent for surfing,</em><em> </em><em>sunset, and tourism infrastructure which detailed makes very famous Kuta beach to foreign countries.</em><em> </em><em>However,</em><em> </em><em>in recent years the beauty of Kuta beach which has become an icon of tourism in Bali began plagued by high levels of contaminant of the marine debris on the beach,</em><em> </em><em>mainly contamination of the marine debris that often accumulate in Kuta beach every season West. The purpose of this study was to determine the condition of water quality based the quality standards of sea water KMNLH Number 51 Years 2004 post contamination of the marine debris that occurred in the Kuta beach of Bali. The method used is to perform measurements using a </em><em>"</em><em>Water Quality Checker</em><em>"</em><em> at 8 measuring stations.</em><em> Water quality parameters which measured, namely physical parameters (temperature, turbidity) and chemical parameters (pH, salinity, DO).</em><em> The results showed a temperature with the range of value 29.10-29.40°C,</em><em> </em><em>turbidity with the value range </em><em>0.30-18.70 NTU</em><em>, pH</em><em> </em><em>with the value range 8.10-8.15 </em><em>DO</em><em> with the value range </em><em>6.85-7.38 mg/L</em><em> and</em><em> salinity</em><em> with the value range </em><em>30.6</em><em>0</em><em>-30.9</em><em>0</em><em>%<sub>o</sub></em><em>.</em><em> Based on the measurement data obtained indicates conditions of the waters chemistry of still suitable </em><em>and condition of the waters physical showed the value of the temperature is still </em><em>suitable</em><em>, except the turbidity value shows the value does not suitable in the station 1, 2 and 8.</em></p><p><em> </em></p><strong><em>Keywords:</em></strong><em> Bali, water quality, Kuta Beach, marine debris</em>

scholarly journals Design of Monitoring System for Salt Concentration in Milkfish Ponds using Android

2019 ◽  
Vol 9 (2) ◽  
pp. 42-46
Author(s):  
Nuzlya Ramadhana
Keyword(s):  
Water Quality ◽  
Water Content ◽  
Monitoring System ◽  
Salt Concentration ◽  
Sea Water ◽  
Salt Content ◽  
Temperature Sensors ◽  
Fish Mortality ◽  
Measuring Instruments ◽  
Ph Sensors

In the cultivation of milkfish, water quality is very concerned about in order to minimize fish mortality when cultivated. Several important factors in the cultivation of milkfish are the level of salt content in the water, temperature and pH. Currently, farmers monitor water quality manually by coming directly to see water quality. If there are dead fish, the cultivator will replace the new water. This will have an impact on fish production which will decrease. The milkfish pond uses brackish water for pond waters. The salt content is between the sea water content and the fresh water content. The grade level may change from season to season. This change is due to biological processes that occur in these waters as well as the interaction between pond waters and the surrounding environment. The results showed that the results of the design of the salt concentration monitoring system in the milkfish ponds that have been carried out using Arduino Uno, conductivity sensors, pH sensors, temperature sensors, wifi modules, Mi-Fi and Smartphones to access android applications. The results of testing the microcontroller functionality that have been made are in accordance with the design and are running well. The system designed to transmit information in the form of salinity values, pH sensors, temperature sensors and TDS values ??with sensor accuracy that is linear with measurement results using conventional measuring instruments with the highest error values ??of 1.3%, 2.06%, 0.702% and 1.5 respectively. %.

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