Alkalinity Research Articles

Impact assessment of the Gajke and Brstje landfills on groundwater status using stable and radioactive isotopes

Waste disposal in landfills represents a severe threat to aquatic environments on the local, regional, and global levels. In Slovenia, there are 69 registered landfills where groundwater is regularly monitored. However, isotope techniques are not regularly employed. Therefore, we employed isotope analysis of hydrogen, carbon, and oxygen in combination with total alkalinity to assess the impact of the selected landfill on groundwater and to evaluate the biogeochemical processes at work. The δ18O, δ2H, δ13CDIC, 3H activity and total alkalinity were determined in October 2020 at 12 sampling points from the surrounding area of the Gajke and Brstje landfills and leachate from the Gajke landfill. The δ18O (-9.24 ± 0.3 ‰) and δ2H (-64.9 ± 2.7 ‰) in groundwater indicate that the main water source consists in direct infiltration of precipitation, with no significant isotopic fractionation. Total alkalinity in the investigated area ranges from 5.45 to 73 mM and δ13CDIC from –14.9 to +6.1 ‰, respectively. Higher values of total alkalinity (up to 73 mM), δ13CDIC (up to +6.1 ‰), δ18O (-7.64 ‰) and 3H (209.8 TU) are detected in the leachate, indicating biogeochemical process related to CO2 reduction or methanogenesis. Methanogenesis could be present at locations GAP-10/13 (Brstje landfill) and G-2 (Gajke landfill) with δ13CDIC values ranging from –8.2 to –7.6 ‰ and with dissolved oxygen values around 0 % and elevated 3H values (from 16 to 18 TU). This study demonstrates the effectiveness of isotopic analysis as a valuable tool for monitoring landfills, revealing shifts in biogeochemical processes within the groundwater there.

Water Quality Parameters of Rupa Lake in Pokhara,Nepal

In this study, physical and biochemical water quality parameters are analyzed from five selected stations in Rupa Lake Pokhara, Nepal using standard procedures. Analyzed parameters are: temperature, turbidity, total solids (TS), electrical conductivity (EC), pH, total alkalinity (TA), total hardness (TH), chloride content, sulphate and dissolved oxygen (DO). Based on the observed water quality parameters, the quality of Rupa Lake water is discussed and compared with WHO standard values for drinking water. Recorded laboratory results shows that water of Rupa Lake is useful for agricultural, industrial, aquatic life, and fishery purposes.

Assessment of physicochemical characteristics and identification of groundwater quality indicator parameters in Aizawl, Mizoram, Northeast India

The increase in population and rapid industrial development have resulted in surface water pollution that stresses groundwater resources to ensure sustainable consumption and human well-being. The present study was aimed to assess the physico-chemical characteristics and heavy metal concentration of groundwater in Aizawl city. The study also seeks to determine the indicator parameters of water quality through analysis of variance (ANOVA) and correlation coefficient in relation to physico-chemical properties. The results revealed that all physico-chemical parameters were within the regulatory standards, except turbidity (80.9 NTU) and phosphate (0.6365 mg/L). Trace amounts of Zinc (Zn) and Copper (Cu) were also present; however, Iron (Fe) and Manganese (Mn) slightly exceeded (Fe: 1.162 mg/L; Mn: 0.6892 mg/L) the permissible limit. Statistically, two-way ANOVA revealed that temperature, chloride, total alkalinity (TA), total hardness (TH), calcium, and dissolved oxygen (DO) were significant (p<0.001) both between sites and seasons. Further, TH showed positive and significant correlation with total dissolved solid (TDS) (R2=0.792), chloride (R2=0.52), TA (R2=0.62), calcium (R2=0.88), and Zn (R2=0.61). Conversely, DO demonstrated negative and significant correlation with turbidity (R2=-0.73), chloride (R2=-0.52), phosphates (R2=-0.70), ammonia (R2=-0.81), and Mn (R2=-0.58). These results indicate that the analysis of TH and DO can serve function as proxies for indirectly indicating the presence and concentrations of the other correlated water quality parameters. Thus, TH and DO act as indicator parameters for water quality in holistic groundwater monitoring in Aizawl. The identification of water quality indicator parameters can play a key role in future research for cost-effective, rapid, and seasonal groundwater monitoring to ensure the sustainable management of this resource.

Quantitative Analysis of Plankton in the Paddy Fields of Kakching District, Manipur

The Plankton analysis along with physico-chemical characteristics of water was carried out on the four sampling sites in the paddy fields of Kakching District. Temperature, transparency, pH, dissolved oxygen, chloride, total alkalinity, acidity, hardness, nitrate and nitrite etc. were analysed and observed in favour on plankton in the paddy fields of the study areas. Phytoplankton recorded as increase during rainy season while decrease in zooplankton during the last part of October. Total 870 plankton, comprising 627 phytoplankton and 243 zooplankton were listed during the investigation period, July to October 2021.

Accelerated eutrophication alters fish and aquatic health: a quantitative assessment by using integrative multimarker, hydrochemical, and GIS modelling method in an urban lake.

The ramifications of anthropogenic activities on the environment and the welfare of aquatic life in lakes worldwide are becoming increasingly alarming. There is a lack of research in the Indian Himalayas on fish biomarker responses to stressful aquatic conditions and the use of environmetric modelling in GIS. Our research evaluates the environmental health of urban lakes in multiple basins using multi-biomarker endpoints (13 features) in Schizothorax niger and hydrochemical characterization (9 features) of water. The study covers 31 grids, each at a distance of 1 km2. This study demonstrated a statistically significant (P = 0.001) increase in white blood cells (WBC), mean cell size (MCH), helminth infection, and health assessment index score (HAIS) score in fish from a highly eutrophic cluster or basin compared to a reference cluster, which is indicative of environmental stress in fish. Based on hydrochemical similarities, the lake water datasets were divided into three categories using hierarchical cluster analysis (HCA). In the PCA analysis, the first three principal components were responsible for 78.1% of the data's variance. The first principal component (PC1) accounted for 57.4% of the variance and had a strong positive loading from ammonia, total phosphate, pH, nitrates, and total alkalinity for water quality parameters. Additionally, PC1 had a favourable loading from WBC, helminth infection (%), and the health assessment index score (HAIS) for biological endpoints. These findings are in alignment with the results of the multivariate analysis. The trophic state index (TSI) showed a significant (P < 0.05) increase in Cluster 1, which includes the peripheral areas of Hazratbal and Gagribal side (> 70), compared to the reference cluster. The multiple regression model indicates that ammonia, phosphate, and nitrate significantly impact the general health of fish (R2 > 0.7). A novel methodology for monitoring water quality fluctuations across different basins and clusters is presented in this study. By integrating fish health biomarkers and GIS technology, we have developed a comprehensive approach to evaluate the overall well-being of aquatic habitat. This technique may prove beneficial in the management of urban lentic water bodies in the Kashmir Himalayas and other comparable water systems around the globe, while also supporting sustainable practices.

A Tidal Flat Adjacent to a Fringe Mangrove Forest Mitigates pCO2 Increases and Enhances Lateral Export of Dissolved Carbon

Carbon export from mangrove forests to the oceans partly acts as a sink for atmospheric CO2, exceeding the rate of carbon burial in mangrove soils. Primary production in ecosystems adjacent to mangroves may prevent degassing and enhance further carbon export from mangroves to the oceans. In this study, we continuously monitored carbonate chemistry parameters (pCO2, dissolved inorganic carbon (DIC), total alkalinity (TA)) and dissolved organic carbon (DOC) in a tidal flat adjacent to a fringe mangrove forest over a spring-neap tidal cycle. Mean pCO2 during the entire period was 923 ± 318 μatm, and the export of TA, DIC, and DOC from the mangroves to the ocean was 36 ± 26 mmol m−2 d−1, 42 ± 39 mmol m−2 d−1, and 10 ± 9 mmol m−2 d−1, respectively. Semi-monthly pCO2 variations in the mangrove front were controlled by the tidal level during spring tide and by photosynthesis and respiration on the tidal flat during neap tide. This means that during neap tide, photosynthesis on the tidal flat offset the increase in pCO2 caused by the porewater export from the mangrove soil. The DIC/TA export ratio in this study was 1.17 ± 0.08, which was lower than the global average of 1.41 ± 1.39, indicating that the tidal flat adjacent to the mangrove forest may act as a buffer zone to mitigate the increase in pCO2, resulting in much of the exported DIC being stored in the ocean.

Seasonal and spatial variability of CO2 emissions in a large tropical mangrove‐dominated delta

AbstractThis study quantified the seasonal and spatial variability of partial pressure of CO2 (pCO2) and water‐atmosphere CO2 fluxes in the Parnaíba River Delta, the largest delta in the Americas. It is a pristine equatorial, mangrove‐dominated environment located in a transitional between humid and semi‐arid climates, with marked seasonality in rainfall and river discharge. Major channels and bays were sampled during dry and wet seasons, with continuous measurements of pCO2, temperature, salinity, and wind velocity. Subsurface water samples were collected in discrete stations for pH, total alkalinity (TA), dissolved inorganic carbon (DIC), dissolved oxygen and chlorophyll a quantification. A significant positive correlation between carbonate system parameters with salinity was found in both periods, with salinity significantly higher in the dry season. Strong deviations of pCO2, TA, and DIC from two endmembers conservative mixing were found, particularly in mangrove‐dominated waters, due to organic matter degradation. The Delta showed high spatial variability of pCO2, with the highest values in mangrove‐dominated waters, moderate in the river‐dominated regions, and lowest in the high salinity areas, suggesting that pCO2 variability is likely controlled by a combination of river‐ocean mixing and biological processes (respiration and photosynthesis). The Delta outgasses about 20 times less CO2 in the dry season (9.06 ± 11.09 mmol m−2.d−1) than in the rainy season (209.68 ± 250.87 mmol m−2 d−1). Our results indicate this large mangrove‐dominated tropical delta is an important source of CO2 to the atmosphere, but a sharp decrease was observed during dry periods.

A Comparative Assessment of the Physicochemical and Microbiological Qualities of Some Drinking Water Sources in Diobu, Portharcourt, Nigeria

Diseases caused as a results of drinking contaminated water pose a severe risk to the public's health. In the current study, various drinking water sources in Diobu, Port Harcourt, were evaluated and their microbiological and physicochemical characteristics were compared. Drinking water samples were collected from a borehole and a sachet (packaged) source. Physicochemical and bacteriological investigations were conducted using standard analytical techniques. The results of physiochemical parameters revealed that sachet water samples had higher pH values than borehole water. The borehole water samples had a mean pH of 4.37±1.21 which was much lower than the W.H.O.- recommended range (6.5-8.5). The study’s Total Suspended Solids readings were within the permissible limits of 30.0 mg/l. The borehole samples had the highest concentration of 6.5±4.31mg/l, while the sachet water samples had the lowest concentration of 2.5±1.5 mg/l. Total Dissolved Solids ranged between 15.8±13.5mg/l in sachet water and 55.6±33.4 mg/l in samples from boreholes. The Electrical Conductivity values were recorded as 33.5±28.4 µScm-1 in sachet water and 136.6±73.9 µScm-1 in borehole water. The mean total alkalinity value in sachet water was 0.57±0.29 mg/l whereas in borehole water, it was 3.29±1.39 mg/l. For sachet water and borehole water, the levels of water hardness ranged from 1.95±0.84 mg/l to 10.67±3.21 mg/l, respectively. The range of biological oxygen demand was &lt; 1±0.00 (for sachet water) to 2.13±13 (for borehole water). Dissolved oxygen levels ranged from 1.72±0.70 mg/l in sachet water to 1.95±0.62 mg/l in borehole water. Chemical oxygen demand levels ranged from 2.38±1.18mg/l (Sachet water) to 11.31±9.49 (Borehole water) while Turbidity ranged from &lt;1±0.00 NTU (Sachet water) to 1.1±0.64 NTU (Borehole water). Except for Chemical Oxygen Demand, there was no difference in the values that were observed that was significant at P≥ 0.05 in this study. The mean total bacterial counts ranged from 2.0 x 104 CFU/ml in sachet water to 9.0 x104 CFU/ml in borehole water, demonstrating high levels of contamination in the borehole water from human contamination. Comparatively to the other water sources, sachet water had the lowest overall bacterial and coliform levels. However, because the bacteriological values for total coliform counts was above the WHO threshold of zero per 100 ml, they did not comply with international standards. Salmonella spp., Pseudomonas spp., Staphylococcus spp., and Escherichia coli were the pathogenic bacteria of public health significance that were isolated from the diverse water samples. Five distinct isolates of fungi, including Penicillium spp., Aspergillus niger, Aspergillus flavus, Trichoderma spp., and Mucor spp., were found. In comparison to borehole water, which had the most bacterial pollutants, sachet water tests had the fewest. It is advised that the water sources be treated before being used for any domestic purposes as the water sources in this research area are not suitable for human consumption.

Forty years of ocean acidification observations (1983–2023) in the Sargasso Sea at the Bermuda Atlantic Time-series Study site

Ocean physical and biogeochemical conditions are rapidly changing over time. Forty years of observations from 1983 to 2023 collected at the Bermuda Atlantic Time-series Study (BATS) site near Bermuda in the North Atlantic Ocean shows continuing trends of surface warming, increase in salinity, loss of dissolved oxygen (DO), increase in carbon dioxide (CO2), and ocean acidification (OA) effects. Over this period, the ocean has warmed by about +1°C, increased in salinity by +0.136, and lost DO by 12.5 µmol kg−1 or ~6%. Since the 1980s, ocean dissolved inorganic carbon (DIC), total alkalinity (TA), a tracer of anthropogenic CO2 (CTrOCA), and fugacities/partial pressures of CO2 (i.e., fCO2 and pCO2) have continued to increase substantially, with no evidence of a reduction in the rates of change over time. Contemporaneously, ocean pH has decreased by ~0.1 pH units [with ocean acidity (i.e., H+) increasing by &amp;gt;30%], and the saturation states of calcium carbonate minerals (Ωcalcite and Ωaragonite) have decreased. These OA indicators show that the chemical conditions for calcification have become less favorable over the past 40 years. Updating of data and trends at the BATS site show how ocean chemistry of the 2020s is now outside the range observed in the 1980s, and how essential these data are for predicting the response of ocean chemistry and marine ecosystems to future shifting earth and ocean conditions.

Isolation of intake mediated effects demonstrate that the phenomic benefits of dietary omega-3 are nominal to Atlantic salmon when reared in a challenging (hypoxic) environment

The present study was designed to examine whether challenging environmental conditions (such as hypoxia) influence a fish's response to diet by changing responses to nutrient utilisation or down-regulation of appetite. To examine this, post-smolt Atlantic salmon (138.8 ± 0.65 g/fish; mean ± SD) were fed sub- (2.6% TFA; Ln3) and optimal (6.0% TFA; Hn3) levels of long-chain polyunsaturated omega-3 fatty acids (n-3 LC-PUFA) when maintained under either normoxic (8.1 ± 0.6 mg/L) or hypoxic (6.8 ± 0.5 mg/L) environmental conditions. To control for the anticipated effects of hypoxia on appetite and food intake, two additional treatments included the two diets that were pair-fed to the same intake levels as in the hypoxic treatments. The reduction in dissolved oxygen was accompanied by an increase in dissolved CO2 and decline in seawater pH, with no change in total alkalinity. After 138 days of the study the fish increased their average weight to between 616 and 720 g/fish subject to treatment. Hypoxia had a significant negative impact on final weight and weight gain, and these were the result primarily of effects on feed intake. No effects of treatments on feed conversion were observed. Significant diet x oxygen interactions were observed on whole-body lipid levels, but no other proximate compositional parameters. Sub-clinical effects of hypoxia and ration on several plasma chemistry parameters were observed, but few responses were diet related. Hypoxia affected plasma total protein, cholesterol, and red blood cell counts. Diet digestibility was typically not affected by hypoxia or ration, though a range of diet related effects were evident. Nutrient retention data showed evidence of elongation and desaturation of dietary short-chain PUFA, with clear effects of diet affecting the deposition of both omega-6 and omega-3 fatty acids. This study builds on findings from earlier studies, but crucially now include controls for the feed intake effects to clarify the roles of hypoxia on the nutrient and intake mediated effects. As a result of these controls, it is now clearer that many of the phenomic responses to long-chain omega-3 by Atlantic salmon are nominal and are largely unaffected by challenging environmental conditions like hypoxia. The inclusion of a series of pair-fed treatments, matching the feed intake levels of corresponding hypoxic treatments, shows that the effects of n-3 LC-PUFA appear to be largely intake mediated effects for Atlantic salmon post-smolts.

Statistical and Geochemical Evaluation of Fluoride-rich Groundwater from North Coastal Part of Odisha

Abstract The chemistry of the groundwater of north coastal part of Odisha is primarily controlled by weathering of minerals present in basement rocks superimposed by anthropogenic activities and sea water intrusion. The water is hard and alkaline in nature, but most of the constituent ions excluding F− are within permissible limits for human consumption. Four factors satisfying over 86% of the total variance and three clusters corresponding to geogenic, alkaline and anthropogenic processes have been identified. Ca2+, Mg2+, Na+, K+, F−, CO32− and HCO3− are geogenic, contributed by the basement rocks and soils. Cl–, SO42– and NO3– are anthropogenic, derived from haphazard household waste disposal, overflows of septic tanks, return flow from irrigation, animal wastes, manures, soil conditioners and chemical fertilizers. K+ and F− belong to both the categories while Na– and Cl– are contributed by saline intrusion to some extent. The pH, total alkalinity and F- represent alkaline component, while HCO3– is derived from weathering of minerals and influence of atmospheric CO2. Change of groundwater types from Ca-HCO3 (fresh water) → Ca-Mg-Cl → Na-Cl (saline water) as well as increase of total dissolved solids in seaward direction indicates the effect of seawater intrusion in the study area. Sympathetic relationship of F” with total alkalinity, pH and Na+ as well as negative correlation with Ca2+ suggest the prevalence of alkaline environment that favors dissolution of fluoride minerals of the basement rocks. It is suggested to minimize the anthropogenic activities like haphazard waste disposal and excessive use of agrochemicals, adopt artificial recharge measures, take up regular groundwater quality check and aware the public for proper management of groundwater resource in the study area.

Combined Effect of Anthropogenic and “Natural” Carbon on Acidification of the Subsurface Ocean Water at the Tip of the Antarctic Peninsula

AbstractDissolved inorganic carbon, total alkalinity, and dissolved N2O samples of upper 500 m were collected at the tip of the Antarctic Peninsula during the 32nd Chinese Antarctic National Research Expedition. The pH and anthropogenic carbon were calculated and the results show that the patterns of anthropogenic carbon uptake and acidification progresses are different in two adjacent regions of this study area. In the region of Weddell‐Scotia confluence, hydrographic processes such as convection prompt the transport of anthropogenic carbon into the subsurface layer, whereas in the region east of Powell Basin, where stratification existed, the downward transport of anthropogenic carbon to this depth is inhibited. However, the pH values indicate that the acidification status of the subsurface waters that are influenced by the above two hydrographic features are similar or even identical at a certain depth range. The progress of ocean acidification in the well‐ventilated region are dominated by anthropogenic carbon uptake, while in the adjacent well‐stratified region, anthropogenic carbon uptake and in situ remineralization of organic matter or horizontal advection of carbon rich water masses or both. In the later region, anthropogenic carbon uptake and in situ remineralization (or horizontal advection) contribute 40% and 60% to pH decline, respectively, suggesting that pH value in water mass of this region may significantly influenced by natural processes.

Some Chemical Properties of Wastewater from the Pharmaceutical Production Processes in the State Company for Drug and Medical Appliances Samarra

The study was conducted during six months, from September 2022 to February 2023, in the General Company for the Industry of Medicines and Medical Supplies in Samarra, one of the companies affiliated to the Ministry of Industry and Minerals. For the purpose of evaluating the efficiency of the biological treatment units for the liquid waste disposed by the company, the water discharged to the treatment units was divided into four sampling stations. : Primary collection basin water or equalization basin (water resulting from industrial processes), aeration basin water (water treated in the treatment unit), sedimentation basin water (water leaving the treatment plant) and liquefaction water (water entering the company). The study includes two aspects: the first is related to the measurement of the chemical properties of the water of the four stations, while the second aspect is that some water determinants were studied and local and international standards and classifications were adopted to compare them. The chemical parameters included pH, dissolved oxygen, biological oxygen requirement, total alkalinity, total hardness, and chloride. The results showed that the pH values tended to be low alkaline with a limited range of variation, as it ranged between 7.1-8.3, while the dissolved oxygen value ranged between 7.0-4.0 mg/l, and the biological oxygen requirement ranged between 1.0-95 mg/l. The results indicate that the values of BOD5 increased in the stations (St.1, St.2, and St.3), in contrast to the station (St.4) for the liquefied water, as it recorded very low values, with significant temporal and spatial differences in most stations within months. the study. As for the total alkalinity, it ranged between 110-200 mg/l in terms of CaCO3 and showed significant temporal and spatial differences in most stations during the months of the study. While the chloride values ranged between 38-255 mg/l. The results of the current study showed a significant variation in the chloride values from one month to the next. The study also confirmed that the chloride values increased during the winter compared to the summer.

Observing Temporally Varying Synoptic‐Scale Total Alkalinity and Dissolved Inorganic Carbon in the Arctic Ocean

AbstractThe long‐term absorption by the oceans of atmospheric carbon dioxide is leading to the slow decline of ocean pH, a process termed ocean acidification (OA). The Arctic is a challenging region to gather enough data to examine the changes in carbonate chemistry over sufficient scales. However, algorithms that calculate carbonate chemistry parameters from more frequently measured parameters, such as temperature and salinity, can be used to fill in data gaps. Here, these published algorithms were evaluated against in situ measurements using different data input types (data from satellites or in situ re‐analysis climatologies) across the Arctic Ocean. With the lowest uncertainties in the Atlantic influenced Seas (AiS), where re‐analysis inputs achieved total alkalinity estimates with Root Mean Squared Deviation (RMSD) of 21 μmol kg−1 and a bias of 2 μmol kg−1 (n = 162) and dissolved inorganic carbon RMSD of 24 μmol kg−1 and bias of −14 μmol kg−1 (n = 262). AiS results using satellite observation inputs show similar bias but larger RMSD, although due to the shorter time span of available satellite observations, more contemporary in situ data would provide further assessment and improvement. Synoptic‐scale observations of surface water carbonate conditions in the Arctic are now possible to monitor OA, but targeted in situ data collection is needed to enable the full exploitation of satellite observation‐based approaches.

Challenges Ahead in Groundwater of Sri Lanka

Groundwater has been a safe water storage in Sri Lanka throughout history and the unique characteristics of different aquifers impact variation of the water quality. However, due to population growth, unplanned urbanization, intensive agriculture, improper waste management, etc., the groundwater quality is considered unsafe. Therefore, it is important to refer to the available data related to the groundwater quality of Sri Lanka. Saltwater intrusion is a considerable factor in shallow karstic aquifers and as a result, relatively higher electrical conductivity, water hardness, total alkalinity, and higher anions concentrations (chloride, sulfate) were observed in the Jaffna area. The dry zone including Padaviya and Hambanthota shows relatively higher water hardness and fluoride in groundwater. Nitrate concentration is also a considerable factor, especially in the Jaffna and Padaviya areas may be due to intensive agriculture. Identification of groundwater recharge zones, recharge estimates, continuous monitoring of groundwater quality, vulnerability mapping of aquifers, and proper planning of urbanization have been identified as challenges ahead in groundwater of Sri Lanka and it is essential to include those items in the National Water Policy in Sri Lanka.

Origin and evolution of the surface desalinated layer of the Kara Sea during the ice-free period

This work focuses on the freshwater contribution (water from the Ob’ and Yenisei rivers and ice meltwater) to the surface layer of the Kara Sea according to 2015–2020 expedition data. Salinity and hydrochemical data (total alkalinity and silicates) were used to calculate the proportion of freshwater in the desalinated layer of the Kara Sea. The ratio of the water fractions with the linear mixing of several sources was considered. Our results showed that riverine sources varied greatly, and the total contributions of the Ob’ and Yenisei runoff ranged from 10 to 60%, while the contribution of ice meltwater did not exceed 25%. The relationship between the period of seasonal ice retreat in the Kara Sea and its proportion in the surface desalinated layer was revealed. The interannual variability in freshwater source composition varied greatly from the southwestern to the eastern part of the sea owing to wind forcing and seasonality in river discharge.

Influence of liqorice growing on the salt composition of low-fertility soils of the Syrdarya region, Uzbekistan

The article describes the influence of licorice on hard-to-reclaim lands, in order to obtain valuable roots and improve soils. The creation of a salt regime of the soil on irrigated lands is achieved only through the implementation of a complex of reclamation and agrotechnical measures, and the most important is the cultivation of licorice. For a comprehensive study of the effect of licorice on soil properties, reference sections were laid in key areas up to the groundwater table, and areas with different durations of licorice cultivation were selected. The following types of work were carried out in the field: description of the soil and soil profile, moisture content of soils and soils, selection of soil samples. Under laboratory conditions, the composition of water-soluble salts was determined. When planting licorice from the first year, a decrease in salt content is observed, by the fourth year of growing licorice, the content of dense residue ranges from 0.735 to 0.890%, by the sixth year, the soil profile to the groundwater level (GWL) turned out to be slightly saline along the profile, the content of dense residue ranges from non-saline to moderately saline degree (0.270-1.200%). With an increase in the limitation period of cultivation in the soil under licorice, the content of the chlorine ion decreases. The degree of alkalinity is strongly influenced by the content of magnesium and sodium in the soil. According to the content of total alkalinity under cultures of different age of growing licorice, there are no special differences in the profile. With an increase in the prescription of licorice cultivation, the amount of toxic salts decreases.

Assessing of Physicochemical Parameters and Seasonal Variations in the Tinau River of Palpa, Nepal

The water quality and quantity parameters in lakes, rivers, marshes and lagoons are affected from both natural factors and human activities. The present study was undertaken to assess the quality of water samples with special reference to physicochemical properties of Tinau River. The water samples were collected from November 2021 to September, 2022 and analysed 17 physico-chemical parameters (Temperature, PH, dissolved oxygen, free CO2, total alkalinity, hardness, turbidity, Ammonia, Nitrogen, Chlorine, Chromium, Copper, Cyanide, Iron, Nitrate nitrogen, Phosphorus, Silica and Sulphide). The result physic-chemical parameters show that turbidity of water is with slightly basic property with PH 8, temperature between16-17°C, DO (9-10.1mg/L), Total alkalinity (65-98mg/l), Hardness (4.8-10.5mg/l), Free CO2 (3-4), Ammonia nitrate trace and other components are negative. This showed that research area are good to excellent quality water for different purposes. In addition, for the purpose of maintaining water quality, it is essential to understand specifics about many physico-chemical properties. These factors need additional study because they can induce water poisoning or chronic poisoning in aquatic animals.

Impact of Physico-Chemical and Biological Parameters on Zooplankton Composition and Abundance in Freshwater Lake of Mulukanoor Karimnagar District, Telangana

The plankton constitutes the basic food sources of any aquatic ecosystem, which Supports fish and other aquatic animals. Zooplankton diversity is one of the most important ecological parameters in water quality assessment. Zooplankton is good indicator of the changes in water quality because they are strongly affected by environmental conditions and respond quickly to changes in water quality. In the present paper, Zooplankton diversity in relation to physico-chemical parameters of the Mulukanoor Lake located in Krimnagar District, Telangana state.The study was carried out for a period of one year from June 2015 to May 2016 to evaluate the relationship and influence between different water quality parameters and the abundance of zooplankton population. The physico-chemical parameters includes Temperature, Electrical Conductivity, Total Dissolved Solids, Water Transparency, PH, Dissolved Oxygen.Free Co2, Total Alkalinity, Total Hardness, Chloride, Biological Oxygen Demand, Phosphate, Nitrate and Ammonia were analyzed. All the values of these parameters were found within the prescribed standard limits. Therefore this lake has rich number of species biodiversity of aquatic animals. Four different groups of zooplankton were identified in this study which includes Rotifera, Cladocera, Copepoda and Ostracoda. Zooplankton diversity and abundance refers to variety within in the community. Numerically rotifers were dominant group throughout the study period. The season wise zooplankton analysis showed a maximum average abundance of species in Post-Monsoon season, minimum abundance in monsoon season due to the different environmental and inflow characteristics of the water body. The composition of zooplankton rotifers was dominant Rotifera(56%) followed by cladocera (23%), copepod (13%) and ostracoda (8%).Therefore it can be now concluded that this lake is highly potential to take up commercial fisheries.

Evaluation of Ground Water Quality in Yeliyur Grama Panchayath Villages, Kunigal Taluk

Life on Earth is dependent on water, which is an essential component of the atmosphere. The source of household water for millions of homes in both rural and urban areas is the tube well. Groundwater is the most alternative is facing threats. Tube well and open well samples were collected at different sites of Yeliyur grama panchayath Villages, Kunigal Taluk. The Physico- Chemical properties of all the collected 20 groundwater samples were analyzed. The quality of groundwater in and around Yeliyur grama panchayath Villages, Kunigal Taluk has been studied various parameter such as pH, Total Dissolved Solid (TDS), total hardness, total alkalinity, turbidity, Na+, K+, Cl-, F-, Ca2+, Mg2+, SO42-, NO32-, DO, Chromium and Pb. The final experimental results were compared with the WHO variable standards (2021).