Source Apportionment of Inorganic Solutes in Surface Waters of Lake Baikal Watershed

The aim of this study was to obtain a detailed picture of the origin of the anthropogenic and natural inorganic solutes in the surface waters of the Lake Baikal watershed using limited data on solute sources. To reveal the origin of solutes, the chemical composition of water was considered as a mixture of solutes from different sources such as rocks and anthropogenic wastes. The end-member mixing approach (EMMA), based on the observation that the element ratios in water uncorrelated with one another are those that exhibit differences in values across the different types of rocks and anthropogenic wastes, was used for source apportionment. According to the results of correlation analysis, two tracers of sources of most abundant ions present in riverine waters were selected. The first tracer was the ratio of combined concentration of calcium and magnesium ions to concentration of potassium ion ((Ca2+ + Mg2+)/K+), and the second tracer was the ratio of sulfate and bicarbonate ion concentrations (SO42−/HCO3−). Using these tracers, three sources of main ions in water, such as sulfide-bearing silicate rocks, non-sulfide silicate rocks and carbonate rocks, were apportioned. The results of cluster analysis showed the possibility of using the ratios of strontium, iron, manganese, molybdenum, nickel, and vanadium concentrations (Sr/Fe, Sr/Mn, Ni/V, Mo/V) as tracers of the trace element sources. The use of these tracers and the obtained data on sources of main ions showed the possibility of identifying the natural trace element sources and distinguishing between natural and anthropogenic trace element sources.

PETROLEUM AND BITUMEN CONTAINING AND INDUSTRIAL ANTHROPOGENIC MATERIALS FOR CONSTRUCTION OF LONG-LASTING ROARDS

This paper raises problem issues of technical conditions of the roads in the Republic in connection with the address of Kassym-Zhomart Tokayev, the President of the country to the people of Kazakhstan.The main problem is poor condition of roads infrastructure resulting in a high level of accidents on dual highways. The second problem is slow rate of roads’ construction and reconstruction according to outdated designing methods and traditional construction technologies for a short operating time of not more than 15-20 years that does not comply with worldwide standards of repair-free service life of roads of 50 years and more. Motorization of the country and freight traffic increases by 25-40% annually, the road load increased 2-3 times resulting in intensive destruction of outdated roads pavements. In connection with this the volume of repairs with respect to costs exceeds more than 50% of total road industry financing. The third problem is a high cost of roads construction. Cost plus technologies are still being widely applied in Kazakhstan. At the same time industrial waste discharge of Kazakhstan’s enterprises accumulated more than 45 billion tons of anthropogenic wastes including petroleum and bitumen containing anthropogenic materials with the application of which innovative resource-saving and power-saving nanotechnologies and nanostructured long-life materials were developed. At the same time, it is possible to reduce the cost of construction and expenses for road maintenance by 2-3 times within 50 years. In addition, to accelerate construction and repairs of 1-2 category roads by 2-3- times, while 3-4 category by 5-6 times. The scientific and technical program headed by national Engineering Academy of the Republic of Kazakhstan for 2021-2023 “To develop and implement efficient technologies of cast-insitu construction of road-transport structures according to world standards with a complex recycling of industrial anthropogenic wastes and recoverable resources” is developed for wide application of nanotechnologies and nanostructured materials in roads construction.

Circulation in the Gulf of Khambhat—A Lagrangian Perspective

The circulation of the Gulf of Khambhat (GoK) is studied from a Lagrangian point of view using a 2D numerical model. The model-predicted tide elevation and current speed are in agreement with the observations. Seasonal variations of advection of particles are simulated by releasing 237 particles homogeneously distributed over the Gulf. After one month of simulation, no particles escaped from the GoK except a few from the southern GoK during southwest monsoon (June–September), and the advection of particles was at its maximum in the northern part. Residual eddies are present inside the GoK during the northeast (October–January) and southwest monsoon seasons. Gulf circulation is studied with the combined forcing of tide and wind for different tidal conditions, which had noticeable seasonal difference. The maximum simulated current speeds of 3.4 and 2.8 m/s are noticed during southwest monsoon near to Bhavnagar and Dahej respectively, where the tide elevations are maximum indicating that GoK is a tide-dominated system. A seasonal barrier could be found in the southern Gulf, which not only makes the Gulf circulation distinct from that of the Arabian Sea (AS), but also restricts water-mass exchange between the Gulf and AS during ebb condition. As the Gulf is a dump yard for anthropogenic wastes, the present study puts forward an effort to determine the fate of the waste from a hydrodynamic point of view.

Inventarisasi dan Komposisi Jenis Ektoparasit Ikan Nila (Oreochromis niloticus) Sebagai Biomonitoring Perairan Sungai Tukad Badung, Bali

Environmental stressors which coming from anthropogenic wastes that indirectly enters into the river waters also affect the biota's health in the ecosystem such as the Tilapia Fish (Oreochromis niloticus) which is found in the waters of the Tukad Badung River, Bali. The presence of parasites in fish is also associated with changes of the water quality. The objectives of this study is to provide data and information on the inventory and composition of the parasite species in Tilapia fish (Oreochromis niloticus) as the aquatic health biomonitoring of in the effort of sustainable river ecosystem management. The results of ectoparasit observation of the Tilapia which obtained from five stations in Tukad Badung waters found 6 types of ectoparasites, which are Trichodina sp. Dactylogyrus sp. Gyrodactylus sp., Chilodonella sp., Vorticella sp. and Lernea sp. The composition of the ectoparasite species of nila tilapia fish (Oreochromis niloticus) obtained from all five research stations in Tukad Badung waters by percentage of presence of ectoparasite Trichodina sp. are 70%, Dactylogyrus sp. 31%, Gyrodactylus sp. 4% and Chilodonella sp., Vorticella sp. and Lernea sp. 1%.

DIETA ESTACIONAL DEL COYOTE (CANIS LATRANS) EN EL PARQUE ESTATAL SIERRA DE TEPOTZOTLÁN, ESTADO DE MÉXICO

<p>This study describes the seasonal variation of <em>Canis latrans</em> diet, through scats analysis, in Sierra de Tepotzotlán state Park. The area includes oak forest, crassicaule thicket, grasslands and deciduous sclerophyllous scrub. A total 53 scats were collected in the 2008-2009 period. With the weight of each prey and frequency of occurrence, the value food importance of each food item was calculated for the dry and rainy season. The coyote behaved like an opportunist-generalist, consumed a total of 19 prey items; the main groups used were: mammals, insects, vegetables, birds, reptiles and anthropogenic wastes. The most important prey in the dry season were the insects Acrididae, the mammal <em>Sciurus aureogaster</em> and fruits of <em>Opuntia estreptocantha</em>. While, for the rainy season was the rabbit <em>Sylvilagus floridanus</em>, followed by birds and insects Scarabeidae. The similarity of the diet between both seasons was low, reflecting the seasonal variation in the abundance and availability of the prey. The consumption of farm birds and food waste, may have negative effects on the health and coyote survival by conflict with the human.</p>