Methods and device for in situ dissolved organic matter (DOM) monitoring in natural waters' environment

Чепыженко, А. И.; Chepyzhenko, Anna A.

doi:10.1117/12.2287797

Cited by 10 publications

(6 citation statements)

References 5 publications

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“…Geographical location of the Sevastopol Bay; scheme of the oceanological stations, location of the sewage releases [7] and the local maximums of the dissolved oil products' concentrations Along with the concentration field of oil products dissolved in water, the TSM and DOM content fields are considered in the interpretation of the results. These substances content was determined on the basis of optical methods [8,9] implemented in the Kondor optical biophysical probing complex (hydrobiophysical multiparameter immersion autonomous complex, URL: http://ecodevice.com.ru/ecodevice-catalogue/multiturbidimeter-kondor). By means of this device, arrays of synchronous measurements (in situ) of TSM and DOM contents in a sounding mode with a resolution of 0.1 m in depth were accumulated and analyzed.…”

Section: Initial Data and Research Methodsmentioning

confidence: 99%

Field of the Dissolved Oil Products Concentration in the Sevastopol Bay Waters (the Black Sea)

Lomakin¹,

Чепыженко²

2020

PhO

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The aim of the work is to identify the patterns of the dissolved oil (DO) field structure in the Sevastopol Bay waters and the factors conditioning its state, to compare the obtained result with the available ideas on large-scale distribution of the water quality indicators on the area under study, to evaluate the current trend of the dissolved oil field state, to consider the relationship between the fields of the dissolved oil concentration, the total suspended matter (TSM) and the dissolved organic matter (DOM). Methods and Results. Based on the data of a series of the oceanological expeditions carried out by Marine Hydrophysical Institute and Institute of Natural and Technical Systems in 1999-2018, the structure of the dissolved oil content field in the Sevastopol Bay (the Black Sea) and the forming it factors are considered. The obtained result is compared with the known structural regularities of the hydrochemical elements' fields. A tendency of the state of the dissolved oil concentration field is assessed. The relationship between the fields of the dissolved oil concentration, total suspended matter and the dissolved organic matter is considered. Conclusions. It is shown that the structure of the dissolved oil content field is conditioned by interaction of the polluted waters in the Sevastopol Bay apex (spacious maximum of the substance concentration was revealed in the region of the Neftyanaya Harbor) with the pure Black Sea waters in its western region. The characteristic structural element of the field under investigation is a wellpronounced meridian frontal section observed on the Southern Bay traverse. Significant local maximum values in the dissolved oil field were observed also in the bays Kilen, Korabel'naya, Artilleriyskaya and Severnaya. The frontal section in the dissolved oil concentration field coincided with the boundary section in the hydrochemical elements' fields, which was earlier revealed in course of studying water pollution in the Sevastopol Bay. Noted are the tendency to decrease of the dissolved oil products' concentration in the Southern Bay waters and the qualitative difference of this substance structure being compared to the fields of the total suspended matter and the dissolved organic matter concentrations.

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Section: Initial Data and Research Methodsmentioning

confidence: 99%

Field of the Dissolved Oil Products Concentration in the Sevastopol Bay Waters (the Black Sea)

Lomakin¹,

Чепыженко²

2020

PhO

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“…The TSM and DOM content was determined on the basis of optical methods [6,7], implemented in the Kondor Optical Probing Complex (URL: http://ecodevice.com.ua/ecodevice-catalogue/multiturbidimeter-kondor). By means of this device, arrays of synchronous in situ measurements of the TSM and DOM content in a probing mode with a depth resolution of 0.1 m were accumulated and analyzed.…”

Section: Initial Data and Research Methodsmentioning

confidence: 99%

Influence of dredging and dumping zones on the ecological situation in the Kerch Strait

Ломакин¹

2019

PhO

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In the present paper structural regularities of the total suspended matter (TSM) and dissolved organic matter (DOM) content fields and the dissolved oil products (OP) concentration in the dredging and dumping areas in the Kerch Strait and the adjacent regions are identified based on the oceanographic data of the expeditions of the Marine Hydrophysical Institute and the Southern Research Institute of Marine Fishery and Oceanography Data and methods. The data of nine complex expeditions in the Kerch Strait in 1999-2013 were analyzed. The concentrations of all the substances under study were determined applying the optical methods. All the surveys were carried out in a probing mode using the Kondor optical probe. Results. It is shown that sea dredging in the commercial port of Kerch was accompanied by significant increase of the total suspended matter content; its concentration was dozen times higher than that in the adjacent area. High content of the total suspended matter, characteristic for the port and the surrounding waters, contributes to accumulation and deposition of the anthropogenic dissolved organic matter, which concentration significantly exceeds the natural one. It is revealed that the dumping zones remain the sources of seawater environment pollution. The pronounced local maxima of the total suspended matter, dissolved organic matter and dissolved oil products concentrations were revealed in the bottom layer just in these zones: here they 1.5-3 times exceeded the natural standards of the considered characteristics. Discussion and conclusion. Dredging is the most significant factor determining the high concentration of suspended matter of anthropogenic origin in the Kerch Strait. The soil removed during dredging has an extremely low compaction and abnormally high fluidity that promotes intensive erosion of the dumping zones and further spread of suspension in the ambient waters. Dredging and dumping zones are not only pockets of environmental hazards; they are also unfavorable for navigation.

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“…В настоящее время флюориметрические измерители РОВ производятся ведущими компаниями мира. Растворенное органическое вещество и его флюоресцентный показатель fDOM нашли широкое применение в мировой практике при решении общих океанологических задач, а также в экологических исследованиях по оценке качества вод прибрежных океанских и морских акваторий, они активно используются известными научными организациями, в том числе и Woods Hole Oceanographic Institution [3][4][5][6][7][8][9][10] Измеритель концентрации fDOM [4] основан на оптическом методе фиксации флюоресцирующей составляющей этого вещества. Спектральные характеристики -участки спектра возбуждения эмиссии (Ex/Em) 370/450 нмстандартны для измерителей флюоресцирующей составляющей РОВ и используются в задачах мониторинга поля этой величины (dissolved organic matter or Carbon -DOM, DOC) [7].…”

Section: исходные данные и методы исследованияunclassified

Structure of the Field of the Colored Dissolved Organic Matter Concentration in the Kerch Strait

Ломакин¹,

Чепыженко²,

Chepyzhenko³

2021

MGZh

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Purpose. Using the data obtained in the expeditions, 2001–2014, the authors intend to identify the typical features of vertical structure of the colored dissolved organic matter (fDOM) concentration field in the Kerch Strait, to type the fDOM(z) profiles, to zone the region under consideration according to a given set of the qualitative features, and also to determine the features of statistical characteristics of the fDOM concentration distribution on the sea surface layer for the water areas with a typical structure. Methods and Results. The typing was carried out by the method of visual expert assessment of the curves of vertical distribution of concentration of the considered value. It was based on analyzing the fDOM(z) profile shapes. To reveal the boundaries of the areas with typical stratification of the fDOM content field, the thermohaline field structure was analyzed. Three types of water vertical structure were identified; they differed in the fDOM(z) profile shape and in statistical indices of empirical distribution of this substance concentration on the sea surface. These are the Azov Sea and the Black Sea types peculiar to the Azov and Black seas waters not contaminated by dissolved organic matter, and the type, the structure of which identifies the waters containing the anthropogenic component in the concentration field of the analyzed value. The latter type is characterized by a special intrusive shape of the fDOM(z) profile. For each of the identified stratification types, the histograms of the fDOM concentration distribution on the sea surface were calculated. Conclusions. The fDOM(z) profiles were typed. The Kerch Strait water area was zoned in accordance with a given set of the preliminary revealed qualitative features. The boundaries of the areas with typical stratification and their displacements were determined. It is shown that each structure type has its own statistical distribution of concentration of the considered value on the sea surface.

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Methods and device for in situ dissolved organic matter (DOM) monitoring in natural waters' environment

Cited by 10 publications

References 5 publications

Field of the Dissolved Oil Products Concentration in the Sevastopol Bay Waters (the Black Sea)

Field of the Dissolved Oil Products Concentration in the Sevastopol Bay Waters (the Black Sea)

Influence of dredging and dumping zones on the ecological situation in the Kerch Strait

Structure of the Field of the Colored Dissolved Organic Matter Concentration in the Kerch Strait

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