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A regional overview describes groundwater resources in Southwestern Algeria, assessing challenges and strategies for sustainable development under climatic and demand pressures.
The hydrodynamic production considers the filtration of liquid from the pits, fenced with spools of Zhchukovskiy, through a layer of soil, underrunable by a well-permeable pressure aquifer, on the roof of which contains an impenetrable area. To study infiltration on the free surface of groundwater, a mixed regional multi-parametric task of the theory of analytical functions is formulated, which is solved by the Semibarinova-Kochina method and methods of conformal display of areas of special species characteristic of the tasks of underground hydromechanics. Refs. 24. Il. 4. Table 1.
This study evaluated the bacteriological quality of groundwater from Imiringi in Ogbia Local government area of Bayelsa State, Nigeria. Groundwater samples were obtained in triplicates from four locations in the study area and analyzed for the bacteria quality using standard protocols. Results showed that the microbial density ranged from 2.97 – 6.03 x 104 cfu/ml (for total heterotrophic bacteria counts), 4.17 – 5.43 x 102 cfu/ml (for Enterobacteriaceae bacteria counts) and 0.00 – 1.48 x 102 cfu/ml (for Salmonella-Shigella counts). Statistically, there was no significant difference (p>0.05) across the various locations for each of the parameters. The density observed were higher than the allowable limit of 1.0 x 102 cfu/ml for drinking water as recommended by World Health Organization/Food and Agricultural Organization, and maximum permissible level of 10cfu/ml for total coliform as specified by Standard Organization of Nigeria. The prevalence of bacteria isolated in the water samples were Aeromonas species (8.00%), Citrobacter species (7.50%), Escherichiacoli (20.75%), Klebsiella species (5.50%), Pseudomonas species (12.00%), Salmonella species (2.25%), Shigella species (3.25%) and Staphylococcus species (40.75%). From the bacteria density and diversity, the water is not potable. Some of the bacterial found are of public health importance. Hence, there is a need to adequately treat the water using chlorination and boiling techniques before drinking.
Access to potable and quality water in most rural communities is low such that over 2.2 billion people worldwide are negatively affected. The increasing population in Fiapre and the inconsistent water supply by the Ghana Water Company Limited (GWCL) have forced most residents to resort to alternative groundwater sources such as boreholes, wells, etc. Yet, many residents use these sources of water unaware of the quality of the water and its potential health implications. This study assessed drinking water quality in Fiapre by calculating its Weight Average Water Quality Index (WAWQI) and investigating potential risk factors associated with contamination through a cross-sectional study and laboratory analysis of various physicochemical and microbiological water quality parameters. WAWQI was used to compute parameters using 10 factors including pH, electrical conductivity, temperature, TDS, phosphate, chloride, total hardness, nitrate, alkalinity, and faecal coliform. The findings revealed that the pH level of water, phosphate concentration, and fecal coliform count surpassed the recommended thresholds set by the World Health Organization (WHO) for safe drinking water. Although levels of electrical conductivity, TDS, nitrate, total hardness, and chlorine kept changing from one water source to another, the difference was not significant apart from phosphate and fecal coliform which shows a significant difference between the sachet water sources and other water sources (P<0.05). The study outcomes demonstrated that the overall water quality is predominantly categorized as good to fairly good, with the highest Water Quality Index (WQI) value reaching 87.84% and the lowest recorded at 54.81%. Therefore, to improve the water quality in the municipality, local management agencies should pay attention to the microbiological quality of the water sources. The study recommends regular handwashing practices, hygienic surroundings of the water source, and drinking water treatment to reduce the possible risk factors associated with the contamination of the water sources.
Small island states, such as Malta face numerous, unique challenges in relation to agricultural sustainability, with solutions amenable to larger states being unfit given the particular characteristics of the island. These include the poor soil conditions, the limited water resources, the aging farmer population, farming being mainly part-time, and most farmers having no formal training. Currently farmers practice intensive agriculture to achieve higher crop productivity at lower production costs by relying heavily on agri-chemicals and over-extracting groundwater. This destroys the Maltese natural environment and urges for the development and implementation of sustainable agriculture practices, whereby traditional farming is supplemented with sustainable alternatives such that local agriculture remains productive in the long-term while safeguarding the local environment. Here we outline some of the critical issues that urgently need to be addressed and potential ways forward in relation to soil, water and biodiversity, implementing permaculture principles in small-scale, practical actions in order to improve the sustainability of local agricultural through a combination of scientific evidence, agricultural technology and traditional practices.
Millions of people from different countries depend on groundwater, which might contain elevated levels of unhygienic constituents. Poor quality of drinking water in many countries has been forcing people to use bottled water. In the present study, groundwater samples were collected in November 2014 leading to twenty-nine analysis of groundwater samples. The primary objective of this paper is to study the selected groundwater quality parameters as an establishment of preliminary baselines on groundwater constituents. A total of twenty nine water samples were collected (fourteen and fifteen samples from North and South regions of Zanzibar Island respectively. Physical parameters (Turbidity, oxidation-reduction potential ORP, Eh, pH, total dissolved soild TDS, salinity, and Electrical conductivity (EC) were determined in situ using Horiba multiparameters digital meters. Analysis of anions (NO3-, Br- , SO42-, F-, NO2-) was carried out using Ion chromatography (IC). Nitrite and nitrate for some water were below detection limit (BDL) The order of relative abundance for anions in samples collected at Northern region of Zanzibar Island, was NO3- > Br- > SO42- > F- > NO2- , while for the Southern region the order was NO3- >Br- > NO2- > SO42- > F- . In both regions, the orders for other parameters were; Turbidity > pH > salinity; and EC >TDS > ORP > Eh. Almost all the measured parameters were within the WHO guidelines for drinking water. However, for nitrate and bromide, the percentage that exceeded the WHO limit was 7%, and 10.3% respectively. Based on toxicological perspective, although few samples had concentrations above groundwater quality criterion it is fundamental to estimate the intake by humans through the drinking water pathways.
Nitrogen leaching as a direct pathway of N loss from agricultural land can negatively affect groundwater and surface water quality. However, a simple and efficient method for nitrogen leaching loss estimation is still inefficient. In this study, an exponential model was developed using the experimental data from a two-year field experiment conducted in the Taihu Lake region of China to simulate the N leaching from the paddy soil. The results showed the leached N was in the range of 5.66 to 8.45 kg N/ha during the whole rice season, which was accounted for 1.7%-2.1% of the applied N. A good agreement between the measured and model predicted results for N leaching loss was observed, suggesting the validity of the established model. The model was further validated with the data of other studies in other regions. The results demonstrated this model is able to simulate the N leaching loss accurately and can provide a beneficial tool for users to predict N leaching loss in paddy soil.
With the possibility of the Water-Energy-Food (WEF) Nexus since a long time back, overlooked interlinkages between WEF are getting the chance to be indisputable. Nonetheless, agriculture is responsible for quite a bit of fresh water over-use. Food production further effects the water and energy sectors through degradation of land, changes in overflow, disturbance of groundwater release, water quality, accessibility of water and land for different purposes. The responsibilities of this unparalleled issue include particular parts of the organization around the Nexus. While a couple of papers try to conceptualize the Nexus-Governance, this phenomenal report gives a rich combination of work for further WEF-Nexus ponders and integrative methodologies.
We consider a plane steady-state filtration in a rectangular bridge with a partially impermeable vertical wall in the presence of evaporation from a free surface of groundwater. To study the effect of evaporation, a mixed multiparametric boundary-value problem of the theory of analytic functions is formulated and using the method of P. Y. Polubarinova-Kochina. Based on the proposed model, an algorithm is developed to calculate the dependence of efficiency and productivity of hydrodynamic analysis.